Winit version 0.29.0-beta.0

.github/workflows/ci.yml

@@ -6,184 +6,146 @@ on:
     branches: [master]
 
 jobs:
-  fmt:
-    name: Check formatting
+  Check_Formatting:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-    - uses: dtolnay/rust-toolchain@stable
+    - uses: hecrj/setup-rust-action@v1
       with:
+        rust-version: stable
         components: rustfmt
     - name: Check Formatting
-      run: cargo fmt -- --check
-
-  tests:
-    name: Test ${{ matrix.toolchain }} ${{ matrix.platform.name }}
-    runs-on: ${{ matrix.platform.os }}
-
-    strategy:
-      fail-fast: false
-      matrix:
-        toolchain: [stable, nightly, '1.65.0']
-        platform:
-          # Note: Make sure that we test all the `docs.rs` targets defined in Cargo.toml!
-          - { name: 'Windows 64bit MSVC', target: x86_64-pc-windows-msvc,   os: windows-latest,  }
-          - { name: 'Windows 32bit MSVC', target: i686-pc-windows-msvc,     os: windows-latest,  }
-          - { name: 'Windows 64bit GNU',  target: x86_64-pc-windows-gnu,    os: windows-latest, host: -x86_64-pc-windows-gnu }
-          - { name: 'Windows 32bit GNU',  target: i686-pc-windows-gnu,      os: windows-latest, host: -i686-pc-windows-gnu }
-          - { name: 'Linux 32bit',        target: i686-unknown-linux-gnu,   os: ubuntu-latest,   }
-          - { name: 'Linux 64bit',        target: x86_64-unknown-linux-gnu, os: ubuntu-latest,   }
-          - { name: 'X11',                target: x86_64-unknown-linux-gnu, os: ubuntu-latest, options: '--no-default-features --features=x11' }
-          - { name: 'Wayland',            target: x86_64-unknown-linux-gnu, os: ubuntu-latest, options: '--no-default-features --features=wayland,wayland-dlopen' }
-          - { name: 'Redox OS',           target: x86_64-unknown-redox,     os: ubuntu-latest,   }
-          - { name: 'macOS',              target: x86_64-apple-darwin,      os: macos-latest,    }
-          - { name: 'iOS x86_64',         target: x86_64-apple-ios,         os: macos-latest,    }
-          - { name: 'iOS Aarch64',        target: aarch64-apple-ios,        os: macos-latest,    }
-          - { name: 'web',                target: wasm32-unknown-unknown,   os: ubuntu-latest,   }
-        include:
-          # Android is tested on stable-3
-          - toolchain: '1.69.0'
-            platform: { name: 'Android', target: aarch64-linux-android, os: ubuntu-latest, options: '--package=winit --features=android-native-activity' }
-          - toolchain: 'stable'
-            platform: { name: 'Android', target: aarch64-linux-android, os: ubuntu-latest, options: '--package=winit --features=android-native-activity' }
-          - toolchain: 'nightly'
-            platform: { name: 'Android', target: aarch64-linux-android, os: ubuntu-latest, options: '--package=winit --features=android-native-activity' }
-
-
-    env:
-      # Set more verbose terminal output
-      CARGO_TERM_VERBOSE: true
-      RUST_BACKTRACE: 1
-
-      # Faster compilation and error on warnings
-      RUSTFLAGS: '--codegen=debuginfo=0 --deny=warnings'
-      RUSTDOCFLAGS: '--deny=warnings'
-
-      OPTIONS: --target=${{ matrix.platform.target }} ${{ matrix.platform.options }}
-
-    steps:
-    - uses: actions/checkout@v3
-
-    - name: Restore cache of cargo folder
-      # We use `restore` and later `save`, so that we can create the key after
-      # the cache has been downloaded.
-      #
-      # This could be avoided if we added Cargo.lock to the repository.
-      uses: actions/cache/restore@v3
-      with:
-        # https://doc.rust-lang.org/cargo/guide/cargo-home.html#caching-the-cargo-home-in-ci
-        path: |
-          ~/.cargo/registry/index/
-          ~/.cargo/registry/cache/
-          ~/.cargo/git/db/
-        key: cargo-${{ matrix.toolchain }}-${{ matrix.platform.name }}-never-intended-to-be-found
-        restore-keys: cargo-${{ matrix.toolchain }}-${{ matrix.platform.name }}
-
-    - name: Generate lockfile
-      # Also updates the crates.io index
-      run: cargo generate-lockfile
-
-    - name: Install GCC Multilib
-      if: (matrix.platform.os == 'ubuntu-latest') && contains(matrix.platform.target, 'i686')
-      run: sudo apt-get update && sudo apt-get install gcc-multilib
-
-    - name: Install xbuild
-      uses: taiki-e/install-action@v2
-      if: contains(matrix.platform.target, 'android') || contains(matrix.platform.target, 'ios')
-      with:
-        tool: xbuild@0.2.0
-
-    - uses: dtolnay/rust-toolchain@master
-      with:
-        toolchain: ${{ matrix.toolchain }}${{ matrix.platform.host }}
-        targets: ${{ matrix.platform.target }}
-        components: clippy
-
-    - name: Install LLVM tools for Android
-      if: contains(matrix.platform.target, 'android')
-      run: sudo apt-get update && sudo apt-get install lld llvm
-
-    - name: Check documentation
-      run: cargo doc --no-deps $OPTIONS --document-private-items
-
-    - name: Build crate 
-      run: cargo build $OPTIONS
-
-    - name: Build and package crate for Android
-      if: contains(matrix.platform.target, 'android')
-      run: x build -p android-xbuild-target --platform android --arch arm64
-
-    - name: Build and package crate for iOS
-      if: contains(matrix.platform.target, 'ios')
-      run: x build -p ios-xbuild-target --platform ios --arch arm64
-
-    - name: Build tests
-      if: >
-        !contains(matrix.platform.target, 'redox') &&
-        !contains(matrix.platform.target, 'android') &&
-        matrix.toolchain != '1.65.0'
-      run: cargo test --no-run $OPTIONS
-
-    - name: Run tests
-      if: >
-        !contains(matrix.platform.target, 'android') &&
-        !contains(matrix.platform.target, 'ios') &&
-        !contains(matrix.platform.target, 'wasm32') &&
-        !contains(matrix.platform.target, 'redox') &&
-        matrix.toolchain != '1.65.0'
-      run: cargo test $OPTIONS
-
-    - name: Lint with clippy
-      if: (matrix.toolchain == 'stable') && !contains(matrix.platform.options, '--no-default-features')
-      run: cargo clippy --all-targets $OPTIONS -- -Dwarnings
-
-    - name: Build tests with serde enabled
-      if: >
-        !contains(matrix.platform.target, 'redox') &&
-        !contains(matrix.platform.target, 'android') &&
-        matrix.toolchain != '1.65.0'
-      run: cargo test --no-run $OPTIONS --features serde
-
-    - name: Run tests with serde enabled
-      if: >
-        !contains(matrix.platform.target, 'android') &&
-        !contains(matrix.platform.target, 'ios') &&
-        !contains(matrix.platform.target, 'wasm32') &&
-        !contains(matrix.platform.target, 'redox') &&
-        matrix.toolchain != '1.65.0'
-      run: cargo test $OPTIONS --features serde
-
-    # See restore step above
-    - name: Save cache of cargo folder
-      uses: actions/cache/save@v3
-      with:
-        path: |
-          ~/.cargo/registry/index/
-          ~/.cargo/registry/cache/
-          ~/.cargo/git/db/
-        key: cargo-${{ matrix.toolchain }}-${{ matrix.platform.name }}-${{ hashFiles('Cargo.lock') }}
-
+      run: cargo +stable fmt --all -- --check
+  
   cargo-deny:
-    name: Run cargo-deny on ${{ matrix.platform.name }}
-    runs-on: ubuntu-latest
+    name: cargo-deny
 
     # TODO: remove this matrix when https://github.com/EmbarkStudios/cargo-deny/issues/324 is resolved
     strategy:
       fail-fast: false
       matrix:
         platform:
-          - { name: 'Android', target: aarch64-linux-android }
-          - { name: 'iOS', target: aarch64-apple-ios }
-          - { name: 'Linux', target: x86_64-unknown-linux-gnu }
-          - { name: 'macOS', target: x86_64-apple-darwin }
-          - { name: 'Redox OS', target: x86_64-unknown-redox }
-          - { name: 'web', target: wasm32-unknown-unknown }
-          - { name: 'Windows', target: x86_64-pc-windows-gnu }
+          - aarch64-apple-ios
+          - aarch64-linux-android
+          - i686-pc-windows-gnu
+          - i686-pc-windows-msvc
+          - i686-unknown-linux-gnu
+          - wasm32-unknown-unknown
+          - x86_64-apple-darwin
+          - x86_64-apple-ios
+          - x86_64-pc-windows-gnu
+          - x86_64-pc-windows-msvc
+          - x86_64-unknown-linux-gnu
+          - x86_64-unknown-redox
 
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
     - uses: EmbarkStudios/cargo-deny-action@v1
       with:
         command: check
         log-level: error
-        arguments: --all-features --target ${{ matrix.platform.target }}
+        arguments: --all-features --target ${{ matrix.platform }}
+
+  tests:
+    name: Tests
+    strategy:
+      fail-fast: false
+      matrix:
+        rust_version: ['1.64.0', stable, nightly]
+        platform:
+          # Note: Make sure that we test all the `docs.rs` targets defined in Cargo.toml!
+          - { target: x86_64-pc-windows-msvc,   os: windows-latest,  }
+          - { target: i686-pc-windows-msvc,     os: windows-latest,  }
+          - { target: x86_64-pc-windows-gnu,    os: windows-latest, host: -x86_64-pc-windows-gnu }
+          - { target: i686-pc-windows-gnu,      os: windows-latest, host: -i686-pc-windows-gnu }
+          - { target: i686-unknown-linux-gnu,   os: ubuntu-latest,   }
+          - { target: x86_64-unknown-linux-gnu, os: ubuntu-latest,   }
+          - { target: x86_64-unknown-linux-gnu, os: ubuntu-latest, options: --no-default-features, features: x11 }
+          - { target: x86_64-unknown-linux-gnu, os: ubuntu-latest, options: --no-default-features, features: "wayland,wayland-dlopen" }
+          - { target: aarch64-linux-android,    os: ubuntu-latest, options: -p winit, cmd: 'apk --', features: "android-native-activity" }
+          - { target: x86_64-unknown-redox,     os: ubuntu-latest,   }
+          - { target: x86_64-apple-darwin,      os: macos-latest,    }
+          - { target: x86_64-apple-ios,         os: macos-latest,    }
+          - { target: aarch64-apple-ios,        os: macos-latest,    }
+          # We're using Windows rather than Ubuntu to run the wasm tests because caching cargo-web
+          # doesn't currently work on Linux.
+          - { target: wasm32-unknown-unknown,   os: windows-latest,  }
+
+    env:
+      RUST_BACKTRACE: 1
+      CARGO_INCREMENTAL: 0
+      RUSTFLAGS: "-C debuginfo=0 --deny warnings"
+      OPTIONS: ${{ matrix.platform.options }}
+      FEATURES: ${{ format(',{0}', matrix.platform.features ) }}
+      CMD: ${{ matrix.platform.cmd }}
+      RUSTDOCFLAGS: -Dwarnings
+
+    runs-on: ${{ matrix.platform.os }}
+    steps:
+    - uses: actions/checkout@v3
+    # Used to cache cargo-web
+    - name: Cache cargo folder
+      uses: actions/cache@v1
+      with:
+        path: ~/.cargo
+        key: ${{ matrix.platform.target }}-cargo-${{ matrix.rust_version }}
+
+    - uses: hecrj/setup-rust-action@v1
+      with:
+        rust-version: ${{ matrix.rust_version }}${{ matrix.platform.host }}
+        targets: ${{ matrix.platform.target }}
+        components: clippy
+
+    - name: Install GCC Multilib
+      if: (matrix.platform.os == 'ubuntu-latest') && contains(matrix.platform.target, 'i686')
+      run: sudo apt-get update && sudo apt-get install gcc-multilib
+    - name: Install cargo-apk
+      if: contains(matrix.platform.target, 'android')
+      run: cargo install cargo-apk
+
+    - name: Check documentation
+      shell: bash
+      run: cargo doc --no-deps --target ${{ matrix.platform.target }} $OPTIONS --features $FEATURES --document-private-items
+
+    - name: Build crate
+      shell: bash
+      run: cargo $CMD build --verbose --target ${{ matrix.platform.target }} $OPTIONS --features $FEATURES
+
+    - name: Build tests
+      shell: bash
+      if: >
+        !contains(matrix.platform.target, 'redox') &&
+        matrix.rust_version != '1.64.0'
+      run: cargo $CMD test --no-run --verbose --target ${{ matrix.platform.target }} $OPTIONS --features $FEATURES
+
+    - name: Run tests
+      shell: bash
+      if: >
+        !contains(matrix.platform.target, 'android') &&
+        !contains(matrix.platform.target, 'ios') &&
+        !contains(matrix.platform.target, 'wasm32') &&
+        !contains(matrix.platform.target, 'redox') &&
+        matrix.rust_version != '1.64.0'
+      run: cargo $CMD test --verbose --target ${{ matrix.platform.target }} $OPTIONS --features $FEATURES
+
+    - name: Lint with clippy
+      shell: bash
+      if: (matrix.rust_version == 'stable') && !contains(matrix.platform.options, '--no-default-features')
+      run: cargo clippy --all-targets --target ${{ matrix.platform.target }} $OPTIONS --features $FEATURES -- -Dwarnings
+
+    - name: Build tests with serde enabled
+      shell: bash
+      if: >
+        !contains(matrix.platform.target, 'redox') &&
+        matrix.rust_version != '1.64.0'
+      run: cargo $CMD test --no-run --verbose --target ${{ matrix.platform.target }} $OPTIONS --features serde,$FEATURES
+    - name: Run tests with serde enabled
+      shell: bash
+      if: >
+        !contains(matrix.platform.target, 'android') &&
+        !contains(matrix.platform.target, 'ios') &&
+        !contains(matrix.platform.target, 'wasm32') &&
+        !contains(matrix.platform.target, 'redox') &&
+        matrix.rust_version != '1.64.0'
+      run: cargo $CMD test --verbose --target ${{ matrix.platform.target }} $OPTIONS --features serde,$FEATURES

CHANGELOG.md

@@ -8,97 +8,6 @@ And please only add new entries to the top of this list, right below the `# Unre
 
 # Unreleased
 
-- Renamed `EventLoopExtRunOnDemand` / `run_ondemand` to `EventLoopExtRunOnDemand` / `run_on_demand`.
-- Make iOS `MonitorHandle` and `VideoMode` usable from other threads.
-- On Web, `ControlFlow::WaitUntil` now uses the Prioritized Task Scheduling API. `setTimeout()`, with a trick to circumvent throttling to 4ms, is used as a fallback.
-- On Web, never return a `MonitorHandle`.
-- **Breaking:** Move `Event::RedrawRequested` to `WindowEvent::RedrawRequested`.
-- On macOS, fix crash in `window.set_minimized(false)`.
-- On Web, enable event propagation and let `DeviceEvent`s appear after `WindowEvent`s.
-- On Web, take all transient activations on the canvas and window into account to queue a fullscreen request.
-- On Web, remove any fullscreen requests from the queue when an external fullscreen activation was detected.
-- On Wayland, fix `TouchPhase::Canceled` being sent for moved events.
-- Mark `startup_notify` unsafe functions as safe.
-- Fix a bug where Wayland would be chosen on Linux even if the user specified `with_x11`. (#3058)
-- **Breaking:** Moved `ControlFlow` to `EventLoopWindowTarget::set_control_flow()` and `EventLoopWindowTarget::control_flow()`.
-- **Breaking:** Moved `ControlFlow::Exit` to `EventLoopWindowTarget::exit()` and `EventLoopWindowTarget::exiting()` and removed `ControlFlow::ExitWithCode(_)` entirely.
-- On Web, add `EventLoopWindowTargetExtWebSys` and `PollStrategy`, which allows to set different strategies for `ControlFlow::Poll`. By default the Prioritized Task Scheduling API is used, but an option to use `Window.requestIdleCallback` is available as well. Both use `setTimeout()`, with a trick to circumvent throttling to 4ms, as a fallback.
-- Implement `PartialOrd` and `Ord` for `MouseButton`.
-- On X11, fix event loop not waking up on `ControlFlow::Poll` and `ControlFlow::WaitUntil`.
-- **Breaking:** Change default `ControlFlow` from `Poll` to `Wait`.
-- **Breaking:** remove `DeviceEvent::Text`.
-- On Android, fix `DeviceId` to contain device id's.
-- Add `Window::set_blur` to request a blur behind the window; implemented on Wayland for now.
-- On Web, fix `ControlFlow::WaitUntil` to never wake up **before** the given time.
-- Add `Window::show_window_menu` to request a titlebar/system menu; implemented on Wayland/Windows for now.
-- On iOS, send events `WindowEvent::Occluded(false)`, `WindowEvent::Occluded(true)` when application enters/leaves foreground.
-- **Breaking** add `Event::MemoryWarning`; implemented on iOS/Android.
-- On Wayland, support `Occluded` event with xdg-shell v6
-
-# 0.29.1-beta
-
-- **Breaking:** Bump `ndk` version to `0.8.0-beta.0`, ndk-sys to `v0.5.0-beta.0`, `android-activity` to `0.5.0-beta.1`.
-- **Breaking:** Bump MSRV from `1.64` to `1.65`.
-- Make iOS windows usable from other threads.
-- Reexport `raw-window-handle` in `window` module.
-- **Breaking:** `WINIT_UNIX_BACKEND` was removed in favor of standard `WAYLAND_DISPLAY` and `DISPLAY` variables.
-- **Breaking:** `EventLoop::new` and `EventLoopBuilder::build` now return `Result<Self, EventLoopError>`
-- On X11, set `visual_id` in returned `raw-window-handle`.
-- **Breaking:** on Wayland, dispatching user created wayland queue won't wake up the loop unless winit has event to send back.
-- Removed platform-specific extensions that should be retrieved through `raw-window-handle` trait implementations instead:
-  - `platform::windows::HINSTANCE`.
-  - `WindowExtWindows::hinstance`.
-  - `WindowExtWindows::hwnd`.
-  - `WindowExtIOS::ui_window`.
-  - `WindowExtIOS::ui_view_controller`.
-  - `WindowExtIOS::ui_view`.
-  - `WindowExtMacOS::ns_window`.
-  - `WindowExtMacOS::ns_view`.
-  - `EventLoopWindowTargetExtWayland::wayland_display`.
-  - `WindowExtWayland::wayland_surface`.
-  - `WindowExtWayland::wayland_display`.
-  - `WindowExtX11::xlib_window`.
-  - `WindowExtX11::xlib_display`.
-  - `WindowExtX11::xlib_screen_id`.
-  - `WindowExtX11::xcb_connection`.
-- On Web, use `Window.requestAnimationFrame()` to throttle `RedrawRequested` events.
-- On Wayland, use frame callbacks to throttle `RedrawRequested` events so redraws will align with compositor.
-- Add `Window::pre_present_notify` to notify winit before presenting to the windowing system.
-- On Windows, added `WindowBuilderExtWindows::with_class_name` to customize the internal class name.
-- **Breaking:** Remove lifetime parameter from `Event` and `WindowEvent`.
-- **Breaking:** `ScaleFactorChanged` now contains a writer instead of a reference to update inner size.
-- On iOS, always wake the event loop when transitioning from `ControlFlow::Poll` to `ControlFlow::Poll`.
-- **Breaking:** `ActivationTokenDone` event which could be requested with the new `startup_notify` module, see its docs for more.
-- On Wayland, make double clicking and moving the CSD frame more reliable.
-- On macOS, add tabbing APIs on `WindowExtMacOS` and `EventLoopWindowTargetExtMacOS`.
-- **Breaking:** Rename `Window::set_inner_size` to `Window::request_inner_size` and indicate if the size was applied immediately.
-- On X11, fix false positive flagging of key repeats when pressing different keys with no release between presses.
-- Implement `PartialOrd` and `Ord` for `Key`, `KeyCode`, `NativeKey`, and `NativeKeyCode`.
-- Add `ElementState::is_pressed`.
-- On Web, implement `WindowEvent::Occluded`.
-- On Web, fix touch location to be as accurate as mouse position.
-- On Web, account for CSS `padding`, `border`, and `margin` when getting or setting the canvas position.
-- On Web, add Fullscreen API compatibility for Safari.
-- On Web, implement `Window::set_(min|max)_inner_size()`.
-- On Web, fix some `Window` methods using incorrect HTML attributes instead of CSS properties.
-- On Web, fix some `WindowBuilder` methods doing nothing.
-- On Web, implement `Window::focus_window()`.
-- On Web, remove unnecessary `Window::is_dark_mode()`, which was replaced with `Window::theme()`.
-- On Web, add `WindowBuilderExtWebSys::with_append()` to append the canvas element to the web page on creation.
-- On Windows, add `drag_resize_window` method support.
-- **Breaking** `run() ->!` has been replaced by `run() -> Result<(), EventLoopError>` for returning errors without calling `std::process::exit()` ([#2767](https://github.com/rust-windowing/winit/pull/2767))
-- **Breaking** Removed `EventLoopExtRunReturn` / `run_return` in favor of `EventLoopExtPumpEvents` / `pump_events` and `EventLoopExtRunOnDemand` / `run_ondemand` ([#2767](https://github.com/rust-windowing/winit/pull/2767))
-- `RedrawRequested` is no longer guaranteed to be emitted after `MainEventsCleared`, it is now platform-specific when the event is emitted after being requested via `redraw_request()`.
-  - On Windows, `RedrawRequested` is now driven by `WM_PAINT` messages which are requested via `redraw_request()`
-- **Breaking** `LoopDestroyed` renamed to `LoopExiting` ([#2900](https://github.com/rust-windowing/winit/issues/2900))
-- **Breaking** `RedrawEventsCleared` removed ([#2900](https://github.com/rust-windowing/winit/issues/2900))
-- **Breaking** `MainEventsCleared` removed ([#2900](https://github.com/rust-windowing/winit/issues/2900))
-- Added `AboutToWait` event which is emitted when the event loop is about to block and wait for new events ([#2900](https://github.com/rust-windowing/winit/issues/2900))
-- **Breaking:** `with_x11_visual` now takes the visual ID instead of the bare pointer.
-- On X11, add a `with_embedded_parent_window` function to the window builder to allow embedding a window into another window.
-- On iOS, add force data to touch events when using the Apple Pencil.
-- On Android, add force data to touch events.
-
 # 0.29.0-beta.0
 
 - On Web, allow event loops to be recreated with `spawn`.
@@ -182,10 +91,6 @@ And please only add new entries to the top of this list, right below the `# Unre
 - **Breaking** `MouseButton` now supports `Back` and `Forward` variants, emitted from mouse events
   on Wayland, X11, Windows, macOS and Web.
 
-# 0.28.7
-
-- Fix window size sometimes being invalid when resizing on macOS 14 Sonoma.
-
 # 0.28.6
 
 - On macOS, fixed memory leak when getting monitor handle.

CONTRIBUTING.md

@@ -20,7 +20,7 @@ your description of the issue as detailed as possible:
 
 When making a code contribution to winit, before opening your pull request, please make sure that:
 
-- your patch builds with Winit's minimal supported rust version - Rust 1.65.
+- your patch builds with Winit's minimal supported rust version - Rust 1.64.
 - you tested your modifications on all the platforms impacted, or if not possible detail which platforms
   were not tested, and what should be tested, so that a maintainer or another contributor can test them
 - you updated any relevant documentation in winit

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "winit"
-version = "0.29.1-beta"
+version = "0.29.0-beta.0"
 authors = ["The winit contributors", "Pierre Krieger <pierre.krieger1708@gmail.com>"]
 description = "Cross-platform window creation library."
 edition = "2021"
@@ -10,10 +10,10 @@ readme = "README.md"
 repository = "https://github.com/rust-windowing/winit"
 documentation = "https://docs.rs/winit"
 categories = ["gui"]
-rust-version = "1.65.0"
+rust-version = "1.64.0"
 
 [package.metadata.docs.rs]
-features = ["rwh_04", "rwh_05", "rwh_06", "serde"]
+features = ["serde"]
 default-target = "x86_64-unknown-linux-gnu"
 # These are all tested in CI
 targets = [
@@ -35,9 +35,9 @@ targets = [
 rustdoc-args = ["--cfg", "docsrs"]
 
 [features]
-default = ["rwh_06", "x11", "wayland", "wayland-dlopen", "wayland-csd-adwaita"]
-x11 = ["x11-dl", "bytemuck", "percent-encoding", "xkbcommon-dl/x11", "x11rb"]
-wayland = ["wayland-client", "wayland-backend", "wayland-protocols", "wayland-protocols-plasma", "sctk", "ahash", "memmap2"]
+default = ["x11", "wayland", "wayland-dlopen", "wayland-csd-adwaita"]
+x11 = ["x11-dl", "percent-encoding", "xkbcommon-dl/x11"]
+wayland = ["wayland-client", "wayland-backend", "wayland-protocols", "sctk", "fnv", "memmap2"]
 wayland-dlopen = ["wayland-backend/dlopen"]
 wayland-csd-adwaita = ["sctk-adwaita", "sctk-adwaita/ab_glyph"]
 wayland-csd-adwaita-crossfont = ["sctk-adwaita", "sctk-adwaita/crossfont"]
@@ -55,9 +55,7 @@ cursor-icon = "1.0.0"
 log = "0.4"
 mint = { version = "0.5.6", optional = true }
 once_cell = "1.12"
-rwh_04 = { package = "raw-window-handle", version = "0.4", optional = true }
-rwh_05 = { package = "raw-window-handle", version = "0.5", features = ["std"], optional = true }
-rwh_06 = { package = "raw-window-handle", version = "0.6", features = ["std"], optional = true }
+raw_window_handle = { package = "raw-window-handle", version = "0.5" }
 serde = { version = "1", optional = true, features = ["serde_derive"] }
 smol_str = "0.2.0"
 
@@ -69,45 +67,18 @@ simple_logger = { version = "2.1.0", default_features = false }
 softbuffer = "0.3.0"
 
 [target.'cfg(target_os = "android")'.dependencies]
-# Coordinate the next winit release android-activity 0.5 release
-android-activity = "=0.5.0-beta.1"
-ndk = "=0.8.0-beta.0"
-ndk-sys = "=0.5.0-beta.0"
+# Coordinate the next winit release with android-ndk-rs: https://github.com/rust-windowing/winit/issues/1995
+android-activity = "0.4.0"
+ndk = "0.7.0"
+ndk-sys = "0.4.0"
 
 [target.'cfg(any(target_os = "ios", target_os = "macos"))'.dependencies]
 core-foundation = "0.9.3"
-objc2 = "0.4.1"
+objc2 = ">=0.3.0-beta.3, <0.3.0-beta.4" # Allow `0.3.0-beta.3.patch-leaks`
 
 [target.'cfg(target_os = "macos")'.dependencies]
-core-graphics = "0.23.1"
-
-[target.'cfg(target_os = "macos")'.dependencies.icrate]
-version = "0.0.4"
-features = [
-    "dispatch",
-    "Foundation",
-    "Foundation_NSArray",
-    "Foundation_NSAttributedString",
-    "Foundation_NSMutableAttributedString",
-    "Foundation_NSData",
-    "Foundation_NSDictionary",
-    "Foundation_NSString",
-    "Foundation_NSProcessInfo",
-    "Foundation_NSThread",
-    "Foundation_NSNumber",
-]
-
-[target.'cfg(target_os = "ios")'.dependencies.icrate]
-version = "0.0.4"
-features = [
-    "dispatch",
-    "Foundation",
-    "Foundation_NSArray",
-    "Foundation_NSString",
-    "Foundation_NSProcessInfo",
-    "Foundation_NSThread",
-    "Foundation_NSSet",
-]
+core-graphics = "0.22.3"
+dispatch = "0.2.0"
 
 [target.'cfg(target_os = "windows")'.dependencies]
 unicode-segmentation = "1.7.1"
@@ -142,22 +113,18 @@ features = [
 ]
 
 [target.'cfg(all(unix, not(any(target_os = "redox", target_family = "wasm", target_os = "android", target_os = "ios", target_os = "macos"))))'.dependencies]
-ahash = { version = "0.8.3", features = ["no-rng"], optional = true }
-bytemuck = { version = "1.13.1", default-features = false, optional = true }
-calloop = "0.12.3"
 libc = "0.2.64"
-memmap2 = { version = "0.9.0", optional = true }
 percent-encoding = { version = "2.0", optional = true }
-rustix = { version = "0.38.4", default-features = false, features = ["std", "system", "thread", "process"] }
-sctk = { package = "smithay-client-toolkit", version = "0.18.0", default-features = false, features = ["calloop"], optional = true }
-sctk-adwaita = { version = "0.7.0", default_features = false, optional = true }
-wayland-backend = { version = "0.3.0", default_features = false, features = ["client_system"], optional = true }
-wayland-client = { version = "0.31.1", optional = true }
-wayland-protocols = { version = "0.31.0", features = [ "staging"], optional = true }
-wayland-protocols-plasma = { version = "0.2.0", features = [ "client" ], optional = true }
+fnv = { version = "1.0.3", optional = true }
+sctk = { package = "smithay-client-toolkit", version = "0.17.0", default-features = false, features = ["calloop"], optional = true }
+sctk-adwaita = { version = "0.6.0", default_features = false, optional = true }
+wayland-client = { version = "0.30.0", optional = true }
+wayland-backend = { version = "0.1.0", default_features = false, features = ["client_system"], optional = true }
+wayland-protocols = { version = "0.30.0", features = [ "staging"], optional = true }
+calloop = "0.10.5"
 x11-dl = { version = "2.18.5", optional = true }
-x11rb = { version = "0.12.0", default-features = false, features = ["allow-unsafe-code", "dl-libxcb", "randr", "resource_manager", "xinput", "xkb"], optional = true }
 xkbcommon-dl = "0.4.0"
+memmap2 = { version = "0.5.0", optional = true }
 
 [target.'cfg(target_os = "redox")'.dependencies]
 orbclient = { version = "0.3.42", default-features = false }
@@ -167,8 +134,6 @@ redox_syscall = "0.3"
 package = "web-sys"
 version = "0.3.64"
 features = [
-    'AbortController',
-    'AbortSignal',
     'console',
     'CssStyleDeclaration',
     'Document',
@@ -180,12 +145,8 @@ features = [
     'FocusEvent',
     'HtmlCanvasElement',
     'HtmlElement',
-    'IntersectionObserver',
-    'IntersectionObserverEntry',
     'KeyboardEvent',
     'MediaQueryList',
-    'MessageChannel',
-    'MessagePort',
     'Node',
     'PageTransitionEvent',
     'PointerEvent',
@@ -194,7 +155,6 @@ features = [
     'ResizeObserverEntry',
     'ResizeObserverOptions',
     'ResizeObserverSize',
-    'VisibilityState',
     'Window',
     'WheelEvent'
 ]
@@ -212,7 +172,5 @@ web-sys = { version = "0.3.22", features = ['CanvasRenderingContext2d'] }
 
 [workspace]
 members = [
-    "xbuild/android-target",
-    "xbuild/ios-target",
     "run-wasm",
 ]

FEATURES.md

@@ -13,9 +13,7 @@ be used to create both games and applications. It supports the following main gr
   - iOS
   - Android
 - Web
-  - Chrome
-  - Firefox
-  - Safari 13.1+
+  - via WASM
 
 Most platforms expose capabilities that cannot be meaningfully transposed onto others. Winit does not
 aim to support every single feature of every platform, but rather to abstract over the common features
@@ -119,7 +117,6 @@ If your PR makes notable changes to Winit's features, please update this section
 
 ## Platform
 ### Windows
-* Setting the name of the internal window class
 * Setting the taskbar icon
 * Setting the parent window
 * Setting a menu bar
@@ -146,6 +143,9 @@ If your PR makes notable changes to Winit's features, please update this section
 
 ### iOS
 * `winit` has a minimum OS requirement of iOS 8
+* Get the `UIWindow` object pointer
+* Get the `UIViewController` object pointer
+* Get the `UIView` object pointer
 * Get the `UIScreen` object pointer
 * Setting the `UIView` hidpi factor
 * Valid orientations
@@ -172,7 +172,7 @@ Legend:
 - ❓: Unknown status
 
 ### Windowing
-|Feature                          |Windows|MacOS   |Linux x11   |Linux Wayland  |Android|iOS    |Web      |Redox OS|
+|Feature                          |Windows|MacOS   |Linux x11   |Linux Wayland  |Android|iOS    |WASM      |Redox OS|
 |-------------------------------- | ----- | ----   | -------    | -----------   | ----- | ----- | -------- | ------ |
 |Window initialization            |✔️     |✔️     |▢[#5]      |✔️             |▢[#33]|▢[#33] |✔️        |✔️      |
 |Providing pointer to init OpenGL |✔️     |✔️     |✔️         |✔️             |✔️     |✔️    |**N/A**|✔️      |
@@ -182,7 +182,6 @@ Legend:
 |Window resizing                  |✔️     |✔️     |✔️         |✔️        |**N/A**|**N/A**|✔️        |✔️      |
 |Window resize increments         |❌     |✔️     |✔️         |❌             |**N/A**|**N/A**|**N/A**|**N/A** |
 |Window transparency              |✔️     |✔️     |✔️         |✔️             |**N/A**|**N/A**|N/A        |✔️      |
-|Window blur                      |❌    |❌    |❌        |✔️             |**N/A**|**N/A**|N/A        |❌     |
 |Window maximization              |✔️     |✔️     |✔️         |✔️             |**N/A**|**N/A**|**N/A**|**N/A** |
 |Window maximization toggle       |✔️     |✔️     |✔️         |✔️             |**N/A**|**N/A**|**N/A**|**N/A** |
 |Window minimization              |✔️     |✔️     |✔️         |✔️             |**N/A**|**N/A**|**N/A**|**N/A** |
@@ -193,20 +192,20 @@ Legend:
 |Popup windows                    |❌     |❌     |❌         |❌             |❌    |❌     |**N/A**|**N/A** |
 
 ### System information
-|Feature          |Windows|MacOS |Linux x11|Linux Wayland|Android|iOS      |Web      |Redox OS|
+|Feature          |Windows|MacOS |Linux x11|Linux Wayland|Android|iOS      |WASM      |Redox OS|
 |---------------- | ----- | ---- | ------- | ----------- | ----- | ------- | -------- | ------ |
 |Monitor list     |✔️    |✔️    |✔️       |✔️          |✔️     |✔️      |**N/A**|❌      |
 |Video mode query |✔️    |✔️    |✔️       |✔️          |✔️     |✔️      |**N/A**|❌      |
 
 ### Input handling
-|Feature                 |Windows   |MacOS   |Linux x11|Linux Wayland|Android|iOS    |Web      |Redox OS|
+|Feature                 |Windows   |MacOS   |Linux x11|Linux Wayland|Android|iOS    |WASM      |Redox OS|
 |----------------------- | -----    | ----   | ------- | ----------- | ----- | ----- | -------- | ------ |
 |Mouse events            |✔️       |▢[#63]  |✔️       |✔️          |**N/A**|**N/A**|✔️        |✔️      |
 |Mouse set location      |✔️       |✔️      |✔️       |✔️(when locked)  |**N/A**|**N/A**|**N/A**|**N/A** |
 |Cursor locking          |❌       |✔️      |❌       |✔️          |**N/A**|**N/A**|✔️        |❌      |
 |Cursor confining        |✔️       |❌      |✔️       |✔️          |**N/A**|**N/A**|❌       |❌      |
 |Cursor icon             |✔️       |✔️      |✔️       |✔️          |**N/A**|**N/A**|✔️        |**N/A** |
-|Cursor hittest          |✔️       |✔️      |✔️       |✔️          |**N/A**|**N/A**|❌        |❌      |
+|Cursor hittest          |✔️       |✔️      |❌       |✔️          |**N/A**|**N/A**|❌        |❌      |
 |Touch events            |✔️       |❌      |✔️       |✔️          |✔️    |✔️     |✔️        |**N/A** |
 |Touch pressure          |✔️       |❌      |❌       |❌          |❌    |✔️     |✔️        |**N/A** |
 |Multitouch              |✔️       |❌      |✔️       |✔️          |✔️    |✔️     |❌        |**N/A** |
@@ -216,19 +215,19 @@ Legend:
 |Gamepad/Joystick events |❌[#804] |❌      |❌       |❌          |❌    |❌     |❓        |**N/A** |
 |Device movement events  |❓        |❓       |❓       |❓           |❌    |❌     |❓        |**N/A** |
 |Drag window with cursor |✔️       |✔️      |✔️       |✔️          |**N/A**|**N/A**|**N/A**   |**N/A** |
-|Resize with cursor      |✔️       |❌       |✔️       |✔️       |**N/A**|**N/A**|**N/A**   |**N/A** |
+|Resize with cursor      |❌         |❌       |✔️       |❌       |**N/A**|**N/A**|**N/A**   |**N/A** |
 
 ### Pending API Reworks
 Changes in the API that have been agreed upon but aren't implemented across all platforms.
 
-|Feature                             |Windows|MacOS |Linux x11|Linux Wayland|Android|iOS    |Web      |Redox OS|
+|Feature                             |Windows|MacOS |Linux x11|Linux Wayland|Android|iOS    |WASM      |Redox OS|
 |------------------------------      | ----- | ---- | ------- | ----------- | ----- | ----- | -------- | ------ |
 |New API for HiDPI ([#315] [#319])   |✔️      |✔️     |✔️        |✔️            |✔️      |✔️      |❓        |❓      |
 |Event Loop 2.0 ([#459])             |✔️      |✔️     |✔️        |✔️            |✔️      |✔️      |❓        |✔️       |
 |Keyboard Input 2.0 ([#753])         |✔️      |✔️     |✔️        |✔️            |✔️      |❌     |✔️         |✔️       |
 
 ### Completed API Reworks
-|Feature                             |Windows|MacOS |Linux x11|Linux Wayland|Android|iOS    |Web      |Redox OS|
+|Feature                             |Windows|MacOS |Linux x11|Linux Wayland|Android|iOS    |WASM      |Redox OS|
 |------------------------------      | ----- | ---- | ------- | ----------- | ----- | ----- | -------- | ------ |
 
 [#165]: https://github.com/rust-windowing/winit/issues/165

README.md

@@ -6,14 +6,14 @@
 
 ```toml
 [dependencies]
-winit = "0.29.1-beta"
+winit = "0.29.0-beta.0"
 ```
 
 ## [Documentation](https://docs.rs/winit)
 
 For features _within_ the scope of winit, see [FEATURES.md](FEATURES.md).
 
-For features _outside_ the scope of winit, see [Are we GUI Yet?](https://areweguiyet.com/) and [Are we game yet?](https://arewegameyet.rs/), depending on what kind of project you're looking to do.
+For features _outside_ the scope of winit, see [Missing features provided by other crates](https://github.com/rust-windowing/winit/wiki/Missing-features-provided-by-other-crates) in the wiki.
 
 ## Contact Us
 
@@ -35,21 +35,22 @@ another library.
 ```rust
 use winit::{
     event::{Event, WindowEvent},
-    event_loop::EventLoop,
+    event_loop::{ControlFlow, EventLoop},
     window::WindowBuilder,
 };
 
 fn main() {
     let event_loop = EventLoop::new();
-    event_loop.set_control_flow(ControlFlow::Wait);
     let window = WindowBuilder::new().build(&event_loop).unwrap();
 
-    event_loop.run(move |event, elwt| {
+    event_loop.run(move |event, _, control_flow| {
+        *control_flow = ControlFlow::Wait;
+
         match event {
             Event::WindowEvent {
                 event: WindowEvent::CloseRequested,
                 window_id,
-            } if window_id == window.id() => elwt.exit(),
+            } if window_id == window.id() => *control_flow = ControlFlow::Exit,
             _ => (),
         }
     });
@@ -66,35 +67,6 @@ Winit provides the following features, which can be enabled in your `Cargo.toml`
 * `wayland` (enabled by default): On Unix platform, compiles with the Wayland backend
 * `mint`: Enables mint (math interoperability standard types) conversions.
 
-## MSRV Policy
-
-The Minimum Supported Rust Version (MSRV) of this crate is **1.65**. Changes to
-the MSRV will be accompanied by a minor version bump.
-
-As a **tentative** policy, the upper bound of the MSRV is given by the following
-formula:
-
-```
-min(sid, stable - 3)
-```
-
-Where `sid` is the current version of `rustc` provided by [Debian Sid], and
-`stable` is the latest stable version of Rust. This bound may be broken in the
-event of a major ecosystem shift or a security vulnerability.
-
-[Debian Sid]: https://packages.debian.org/sid/rustc
-
-The exception to this is for the Android platform, where a higher Rust version
-must be used for certain Android features. In this case, the MSRV will be
-capped at the latest stable version of Rust minus three. This inconsistency is
-not reflected in Cargo metadata, as it is not powerful enough to expose this
-restriction.
-
-All crates in the [`rust-windowing`] organizations have the
-same MSRV policy.
-
-[`rust-windowing`]: https://github.com/rust-windowing
-
 ### Platform-specific usage
 
 #### Wayland
@@ -123,7 +95,7 @@ book].
 
 #### Android
 
-The Android backend builds on (and exposes types from) the [`ndk`](https://docs.rs/ndk/latest/ndk/) crate.
+The Android backend builds on (and exposes types from) the [`ndk`](https://docs.rs/ndk/0.7.0/ndk/) crate.
 
 Native Android applications need some form of "glue" crate that is responsible
 for defining the main entry point for your Rust application as well as tracking
@@ -142,7 +114,6 @@ clash.
 
 | winit |       ndk-glue               |
 | :---: | :--------------------------: |
-| 0.29.1-beta  | `android-activity = "0.5.0-beta.1"`   |
 | 0.28  | `android-activity = "0.4"`   |
 | 0.27  | `ndk-glue = "0.7"`           |
 | 0.26  | `ndk-glue = "0.5"`           |
@@ -179,7 +150,7 @@ class. Your application _must_ specify the base class it needs via a feature fla
 
 For example, add this to Cargo.toml:
 ```toml
-winit = { version = "0.29.1-beta", features = [ "android-native-activity" ] }
+winit = { version = "0.28", features = [ "android-native-activity" ] }
 
 [target.'cfg(target_os = "android")'.dependencies]
 android_logger = "0.11.0"
@@ -210,7 +181,7 @@ For more details, refer to these `android-activity` [example applications](https
 
 If your application is currently based on `NativeActivity` via the `ndk-glue` crate and building with `cargo apk` then the minimal changes would be:
 1. Remove `ndk-glue` from your `Cargo.toml`
-2. Enable the `"android-native-activity"` feature for Winit: `winit = { version = "0.29.1-beta", features = [ "android-native-activity" ] }`
+2. Enable the `"android-native-activity"` feature for Winit: `winit = { version = "0.28", features = [ "android-native-activity" ] }`
 3. Add an `android_main` entrypoint (as above), instead of using the '`[ndk_glue::main]` proc macro from `ndk-macros` (optionally add a dependency on `android_logger` and initialize logging as above).
 4. Pass a clone of the `AndroidApp` that your application receives to Winit when building your event loop (as shown above).
 

build.rs

@@ -8,12 +8,12 @@ fn main() {
     cfg_aliases! {
         // Systems.
         android_platform: { target_os = "android" },
-        wasm_platform: { all(target_family = "wasm", not(target_os = "emscripten")) },
+        wasm_platform: { target_family = "wasm" },
         macos_platform: { target_os = "macos" },
         ios_platform: { target_os = "ios" },
         windows_platform: { target_os = "windows" },
         apple: { any(target_os = "ios", target_os = "macos") },
-        free_unix: { all(unix, not(apple), not(android_platform), not(target_os = "emscripten")) },
+        free_unix: { all(unix, not(apple), not(android_platform)) },
         redox: { target_os = "redox" },
 
         // Native displays.

clippy.toml

@@ -4,10 +4,4 @@ disallowed-methods = [
     { path = "web_sys::HtmlCanvasElement::height", reason = "Winit shouldn't touch the internal canvas size" },
     { path = "web_sys::HtmlCanvasElement::set_width", reason = "Winit shouldn't touch the internal canvas size" },
     { path = "web_sys::HtmlCanvasElement::set_height", reason = "Winit shouldn't touch the internal canvas size" },
-    { path = "web_sys::Window::document", reason = "cache this to reduce calls to JS" },
-    { path = "web_sys::Window::get_computed_style", reason = "cache this to reduce calls to JS" },
-    { path = "web_sys::Element::request_fullscreen", reason = "Doesn't account for compatibility with Safari" },
-    { path = "web_sys::Document::exit_fullscreen", reason = "Doesn't account for compatibility with Safari" },
-    { path = "web_sys::Document::fullscreen_element", reason = "Doesn't account for compatibility with Safari" },
-    { path = "icrate::AppKit::NSView::visibleRect", reason = "We expose a render target to the user, and visibility is not really relevant to that (and can break if you don't use the rectangle position as well). Use `frame` instead." },
 ]

deny.toml

@@ -31,16 +31,16 @@ multiple-versions = "deny"
 wildcards = "allow" # at least until https://github.com/EmbarkStudios/cargo-deny/issues/241 is fixed
 deny = []
 skip = [
-    { name = "raw-window-handle" },    # we intentionally have multiple versions of this
-    { name = "bitflags" },             # the ecosystem is in the process of migrating.
-    { name = "libloading" },           # x11rb uses a different version until the next update
-    { name = "syn" },                  # https://github.com/rust-mobile/ndk/issues/392
-    { name = "num_enum"},              # See above ^, waiting for release
-    { name = "num_enum_derive"},       # See above ^, waiting for release
-    { name = "miniz_oxide"},           # https://github.com/rust-lang/flate2-rs/issues/340
-    { name = "redox_syscall" },        # https://gitlab.redox-os.org/redox-os/orbclient/-/issues/46
-    { name = "foreign-types-shared" }, # https://github.com/servo/core-foundation-rs/issues/634
-    { name = "foreign-types" },        # See above ^, waiting for release
+    { name = "bitflags" },      # the ecosystem is in the process of migrating.
+    { name = "nix" },           # differing version - as of 2023-03-02 whis can be solved with `cargo update && cargo update -p calloop --precise 0.10.2`
+    { name = "memoffset"},      # due to different nix versions.
+    { name = "memmap2" },       # sctk uses a different version until the next update
+    { name = "libloading" },    # x11rb uses a different version until the next update
+    { name = "syn" },           # https://github.com/rust-mobile/ndk/issues/392 and https://github.com/rustwasm/wasm-bindgen/issues/3390
+    { name = "num_enum"},       # See above ^, waiting for release
+    { name = "num_enum_derive"},# See above ^, waiting for release
+    { name = "miniz_oxide"},    # https://github.com/rust-lang/flate2-rs/issues/340
+    { name = "redox_syscall" }, # https://gitlab.redox-os.org/redox-os/orbclient/-/issues/46
 ]
 skip-tree = []
 

examples/child_window.rs

@@ -1,23 +1,16 @@
-#[cfg(all(
-    feature = "rwh_06",
-    any(x11_platform, macos_platform, windows_platform)
-))]
+#[cfg(any(x11_platform, macos_platform, windows_platform))]
 #[path = "util/fill.rs"]
 mod fill;
 
-#[cfg(all(
-    feature = "rwh_06",
-    any(x11_platform, macos_platform, windows_platform)
-))]
-#[allow(deprecated)]
-fn main() -> Result<(), impl std::error::Error> {
+#[cfg(any(x11_platform, macos_platform, windows_platform))]
+fn main() {
     use std::collections::HashMap;
 
+    use raw_window_handle::HasRawWindowHandle;
     use winit::{
         dpi::{LogicalPosition, LogicalSize, Position},
         event::{ElementState, Event, KeyEvent, WindowEvent},
-        event_loop::{EventLoop, EventLoopWindowTarget},
-        raw_window_handle::HasRawWindowHandle,
+        event_loop::{ControlFlow, EventLoop, EventLoopWindowTarget},
         window::{Window, WindowBuilder, WindowId},
     };
 
@@ -26,7 +19,7 @@ fn main() -> Result<(), impl std::error::Error> {
         event_loop: &EventLoopWindowTarget<()>,
         windows: &mut HashMap<WindowId, Window>,
     ) {
-        let parent = parent.raw_window_handle().unwrap();
+        let parent = parent.raw_window_handle();
         let mut builder = WindowBuilder::new()
             .with_title("child window")
             .with_inner_size(LogicalSize::new(200.0f32, 200.0f32))
@@ -43,7 +36,7 @@ fn main() -> Result<(), impl std::error::Error> {
 
     let mut windows = HashMap::new();
 
-    let event_loop: EventLoop<()> = EventLoop::new().unwrap();
+    let event_loop: EventLoop<()> = EventLoop::new();
     let parent_window = WindowBuilder::new()
         .with_title("parent window")
         .with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
@@ -53,12 +46,14 @@ fn main() -> Result<(), impl std::error::Error> {
 
     println!("parent window: {parent_window:?})");
 
-    event_loop.run(move |event: Event<()>, elwt| {
+    event_loop.run(move |event: Event<'_, ()>, event_loop, control_flow| {
+        *control_flow = ControlFlow::Wait;
+
         if let Event::WindowEvent { event, window_id } = event {
             match event {
                 WindowEvent::CloseRequested => {
                     windows.clear();
-                    elwt.exit();
+                    *control_flow = ControlFlow::Exit;
                 }
                 WindowEvent::CursorEntered { device_id: _ } => {
                     // On x11, println when the cursor entered in a window even if the child window is created
@@ -75,23 +70,19 @@ fn main() -> Result<(), impl std::error::Error> {
                         },
                     ..
                 } => {
-                    spawn_child_window(&parent_window, elwt, &mut windows);
-                }
-                WindowEvent::RedrawRequested => {
-                    if let Some(window) = windows.get(&window_id) {
-                        fill::fill_window(window);
-                    }
+                    spawn_child_window(&parent_window, event_loop, &mut windows);
                 }
                 _ => (),
             }
+        } else if let Event::RedrawRequested(wid) = event {
+            if let Some(window) = windows.get(&wid) {
+                fill::fill_window(window);
+            }
         }
     })
 }
 
-#[cfg(not(all(
-    feature = "rwh_06",
-    any(x11_platform, macos_platform, windows_platform)
-)))]
+#[cfg(not(any(x11_platform, macos_platform, windows_platform)))]
 fn main() {
-    panic!("This example is supported only on x11, macOS, and Windows, with the `rwh_06` feature enabled.");
+    panic!("This example is supported only on x11, macOS, and Windows.");
 }

examples/control_flow.rs

@@ -9,7 +9,7 @@ use web_time as time;
 use simple_logger::SimpleLogger;
 use winit::{
     event::{ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::{ControlFlow, EventLoop},
+    event_loop::EventLoop,
     keyboard::Key,
     window::WindowBuilder,
 };
@@ -27,7 +27,7 @@ enum Mode {
 const WAIT_TIME: time::Duration = time::Duration::from_millis(100);
 const POLL_SLEEP_TIME: time::Duration = time::Duration::from_millis(100);
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
 
     println!("Press '1' to switch to Wait mode.");
@@ -36,7 +36,7 @@ fn main() -> Result<(), impl std::error::Error> {
     println!("Press 'R' to toggle request_redraw() calls.");
     println!("Press 'Esc' to close the window.");
 
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
     let window = WindowBuilder::new()
         .with_title("Press 1, 2, 3 to change control flow mode. Press R to toggle redraw requests.")
         .build(&event_loop)
@@ -47,7 +47,7 @@ fn main() -> Result<(), impl std::error::Error> {
     let mut wait_cancelled = false;
     let mut close_requested = false;
 
-    event_loop.run(move |event, elwt| {
+    event_loop.run(move |event, _, control_flow| {
         use winit::event::StartCause;
         println!("{event:?}");
         match event {
@@ -93,36 +93,34 @@ fn main() -> Result<(), impl std::error::Error> {
                     }
                     _ => (),
                 },
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
                 _ => (),
             },
-            Event::AboutToWait => {
+            Event::MainEventsCleared => {
                 if request_redraw && !wait_cancelled && !close_requested {
                     window.request_redraw();
                 }
-
+                if close_requested {
+                    control_flow.set_exit();
+                }
+            }
+            Event::RedrawRequested(_window_id) => {
+                fill::fill_window(&window);
+            }
+            Event::RedrawEventsCleared => {
                 match mode {
-                    Mode::Wait => elwt.set_control_flow(ControlFlow::Wait),
+                    Mode::Wait => control_flow.set_wait(),
                     Mode::WaitUntil => {
                         if !wait_cancelled {
-                            elwt.set_control_flow(ControlFlow::WaitUntil(
-                                time::Instant::now() + WAIT_TIME,
-                            ));
+                            control_flow.set_wait_until(time::Instant::now() + WAIT_TIME);
                         }
                     }
                     Mode::Poll => {
                         thread::sleep(POLL_SLEEP_TIME);
-                        elwt.set_control_flow(ControlFlow::Poll);
+                        control_flow.set_poll();
                     }
                 };
-
-                if close_requested {
-                    elwt.exit();
-                }
             }
             _ => (),
         }
-    })
+    });
 }

examples/cursor.rs

@@ -10,44 +10,51 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new().build(&event_loop).unwrap();
     window.set_title("A fantastic window!");
 
     let mut cursor_idx = 0;
 
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::KeyboardInput {
-                    event:
-                        KeyEvent {
-                            state: ElementState::Pressed,
-                            ..
-                        },
-                    ..
-                } => {
-                    println!("Setting cursor to \"{:?}\"", CURSORS[cursor_idx]);
-                    window.set_cursor_icon(CURSORS[cursor_idx]);
-                    if cursor_idx < CURSORS.len() - 1 {
-                        cursor_idx += 1;
-                    } else {
-                        cursor_idx = 0;
-                    }
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
+
+        match event {
+            Event::WindowEvent {
+                event:
+                    WindowEvent::KeyboardInput {
+                        event:
+                            KeyEvent {
+                                state: ElementState::Pressed,
+                                ..
+                            },
+                        ..
+                    },
+                ..
+            } => {
+                println!("Setting cursor to \"{:?}\"", CURSORS[cursor_idx]);
+                window.set_cursor_icon(CURSORS[cursor_idx]);
+                if cursor_idx < CURSORS.len() - 1 {
+                    cursor_idx += 1;
+                } else {
+                    cursor_idx = 0;
                 }
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
-                WindowEvent::CloseRequested => {
-                    elwt.exit();
-                }
-                _ => (),
             }
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => {
+                control_flow.set_exit();
+            }
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
+            }
+            _ => (),
         }
-    })
+    });
 }
 
 const CURSORS: &[CursorIcon] = &[

examples/cursor_grab.rs

@@ -11,9 +11,9 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("Super Cursor Grab'n'Hide Simulator 9000")
@@ -22,52 +22,56 @@ fn main() -> Result<(), impl std::error::Error> {
 
     let mut modifiers = ModifiersState::default();
 
-    event_loop.run(move |event, elwt| match event {
-        Event::WindowEvent { event, .. } => match event {
-            WindowEvent::CloseRequested => elwt.exit(),
-            WindowEvent::KeyboardInput {
-                event:
-                    KeyEvent {
-                        logical_key: key,
-                        state: ElementState::Released,
-                        ..
-                    },
-                ..
-            } => {
-                let result = match key {
-                    Key::Escape => {
-                        elwt.exit();
-                        Ok(())
-                    }
-                    Key::Character(ch) => match ch.to_lowercase().as_str() {
-                        "g" => window.set_cursor_grab(CursorGrabMode::Confined),
-                        "l" => window.set_cursor_grab(CursorGrabMode::Locked),
-                        "a" => window.set_cursor_grab(CursorGrabMode::None),
-                        "h" => {
-                            window.set_cursor_visible(modifiers.shift_key());
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
+
+        match event {
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::CloseRequested => control_flow.set_exit(),
+                WindowEvent::KeyboardInput {
+                    event:
+                        KeyEvent {
+                            logical_key: key,
+                            state: ElementState::Released,
+                            ..
+                        },
+                    ..
+                } => {
+                    let result = match key {
+                        Key::Escape => {
+                            control_flow.set_exit();
                             Ok(())
                         }
+                        Key::Character(ch) => match ch.to_lowercase().as_str() {
+                            "g" => window.set_cursor_grab(CursorGrabMode::Confined),
+                            "l" => window.set_cursor_grab(CursorGrabMode::Locked),
+                            "a" => window.set_cursor_grab(CursorGrabMode::None),
+                            "h" => {
+                                window.set_cursor_visible(modifiers.shift_key());
+                                Ok(())
+                            }
+                            _ => Ok(()),
+                        },
                         _ => Ok(()),
-                    },
-                    _ => Ok(()),
-                };
+                    };
 
-                if let Err(err) = result {
-                    println!("error: {err}");
+                    if let Err(err) = result {
+                        println!("error: {err}");
+                    }
                 }
-            }
-            WindowEvent::ModifiersChanged(new) => modifiers = new.state(),
-            WindowEvent::RedrawRequested => fill::fill_window(&window),
-            _ => (),
-        },
-        Event::DeviceEvent { event, .. } => match event {
-            DeviceEvent::MouseMotion { delta } => println!("mouse moved: {delta:?}"),
-            DeviceEvent::Button { button, state } => match state {
-                ElementState::Pressed => println!("mouse button {button} pressed"),
-                ElementState::Released => println!("mouse button {button} released"),
+                WindowEvent::ModifiersChanged(new) => modifiers = new.state(),
+                _ => (),
             },
+            Event::DeviceEvent { event, .. } => match event {
+                DeviceEvent::MouseMotion { delta } => println!("mouse moved: {delta:?}"),
+                DeviceEvent::Button { button, state } => match state {
+                    ElementState::Pressed => println!("mouse button {button} pressed"),
+                    ElementState::Released => println!("mouse button {button} released"),
+                },
+                _ => (),
+            },
+            Event::RedrawRequested(_) => fill::fill_window(&window),
             _ => (),
-        },
-        _ => (),
-    })
+        }
+    });
 }

examples/custom_events.rs

@@ -1,7 +1,7 @@
 #![allow(clippy::single_match)]
 
 #[cfg(not(wasm_platform))]
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     use simple_logger::SimpleLogger;
     use winit::{
         event::{Event, WindowEvent},
@@ -18,9 +18,7 @@ fn main() -> Result<(), impl std::error::Error> {
     }
 
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoopBuilder::<CustomEvent>::with_user_event()
-        .build()
-        .unwrap();
+    let event_loop = EventLoopBuilder::<CustomEvent>::with_user_event().build();
 
     let window = WindowBuilder::new()
         .with_title("A fantastic window!")
@@ -40,20 +38,21 @@ fn main() -> Result<(), impl std::error::Error> {
         }
     });
 
-    event_loop.run(move |event, elwt| match event {
-        Event::UserEvent(event) => println!("user event: {event:?}"),
-        Event::WindowEvent {
-            event: WindowEvent::CloseRequested,
-            ..
-        } => elwt.exit(),
-        Event::WindowEvent {
-            event: WindowEvent::RedrawRequested,
-            ..
-        } => {
-            fill::fill_window(&window);
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
+
+        match event {
+            Event::UserEvent(event) => println!("user event: {event:?}"),
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => control_flow.set_exit(),
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
+            }
+            _ => (),
         }
-        _ => (),
-    })
+    });
 }
 
 #[cfg(wasm_platform)]

examples/drag_window.rs

@@ -11,25 +11,27 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window_1 = WindowBuilder::new().build(&event_loop).unwrap();
     let window_2 = WindowBuilder::new().build(&event_loop).unwrap();
 
     let mut switched = false;
     let mut entered_id = window_2.id();
-    let mut cursor_location = None;
 
-    event_loop.run(move |event, elwt| match event {
+    event_loop.run(move |event, _, control_flow| match event {
         Event::NewEvents(StartCause::Init) => {
             eprintln!("Switch which window is to be dragged by pressing \"x\".")
         }
         Event::WindowEvent { event, window_id } => match event {
-            WindowEvent::CloseRequested => elwt.exit(),
-            WindowEvent::CursorMoved { position, .. } => cursor_location = Some(position),
-            WindowEvent::MouseInput { state, button, .. } => {
+            WindowEvent::CloseRequested => control_flow.set_exit(),
+            WindowEvent::MouseInput {
+                state: ElementState::Pressed,
+                button: MouseButton::Left,
+                ..
+            } => {
                 let window = if (window_id == window_1.id() && switched)
                     || (window_id == window_2.id() && !switched)
                 {
@@ -38,15 +40,7 @@ fn main() -> Result<(), impl std::error::Error> {
                     &window_1
                 };
 
-                match (button, state) {
-                    (MouseButton::Left, ElementState::Pressed) => window.drag_window().unwrap(),
-                    (MouseButton::Right, ElementState::Released) => {
-                        if let Some(position) = cursor_location {
-                            window.show_window_menu(position);
-                        }
-                    }
-                    _ => (),
-                }
+                window.drag_window().unwrap()
             }
             WindowEvent::CursorEntered { .. } => {
                 entered_id = window_id;
@@ -60,37 +54,22 @@ fn main() -> Result<(), impl std::error::Error> {
                         ..
                     },
                 ..
-            } => match c.as_str() {
-                "x" => {
-                    switched = !switched;
-                    name_windows(entered_id, switched, &window_1, &window_2);
-                    println!("Switched!")
-                }
-                "d" => {
-                    let window = if (window_id == window_1.id() && switched)
-                        || (window_id == window_2.id() && !switched)
-                    {
-                        &window_2
-                    } else {
-                        &window_1
-                    };
-
-                    window.set_decorations(!window.is_decorated());
-                }
-                _ => (),
-            },
-            WindowEvent::RedrawRequested => {
-                if window_id == window_1.id() {
-                    fill::fill_window(&window_1);
-                } else if window_id == window_2.id() {
-                    fill::fill_window(&window_2);
-                }
+            } if c == "x" => {
+                switched = !switched;
+                name_windows(entered_id, switched, &window_1, &window_2);
+                println!("Switched!")
             }
             _ => (),
         },
-
+        Event::RedrawRequested(wid) => {
+            if wid == window_1.id() {
+                fill::fill_window(&window_1);
+            } else if wid == window_2.id() {
+                fill::fill_window(&window_2);
+            }
+        }
         _ => (),
-    })
+    });
 }
 
 fn name_windows(window_id: WindowId, switched: bool, window_1: &Window, window_2: &Window) {

examples/fullscreen.rs

@@ -1,7 +1,6 @@
 #![allow(clippy::single_match)]
 
 use simple_logger::SimpleLogger;
-use winit::dpi::PhysicalSize;
 use winit::event::{ElementState, Event, KeyEvent, WindowEvent};
 use winit::event_loop::EventLoop;
 use winit::keyboard::Key;
@@ -13,14 +12,12 @@ use winit::platform::macos::WindowExtMacOS;
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let mut decorations = true;
     let mut minimized = false;
-    let mut with_min_size = false;
-    let mut with_max_size = false;
 
     let window = WindowBuilder::new()
         .with_title("Hello world!")
@@ -49,13 +46,13 @@ fn main() -> Result<(), impl std::error::Error> {
     println!("- D\tToggle window decorations");
     println!("- X\tMaximize window");
     println!("- Z\tMinimize window");
-    println!("- I\tToggle mIn size limit");
-    println!("- A\tToggle mAx size limit");
 
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
+    event_loop.run(move |event, elwt, control_flow| {
+        control_flow.set_wait();
+
+        match event {
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::CloseRequested => control_flow.set_exit(),
                 WindowEvent::KeyboardInput {
                     event:
                         KeyEvent {
@@ -65,7 +62,7 @@ fn main() -> Result<(), impl std::error::Error> {
                         },
                     ..
                 } => match key {
-                    Key::Escape => elwt.exit(),
+                    Key::Escape => control_flow.set_exit(),
                     // WARNING: Consider using `key_without_modifers()` if available on your platform.
                     // See the `key_binding` example
                     Key::Character(ch) => match ch.to_lowercase().as_str() {
@@ -123,41 +120,16 @@ fn main() -> Result<(), impl std::error::Error> {
                             minimized = !minimized;
                             window.set_minimized(minimized);
                         }
-                        "i" => {
-                            with_min_size = !with_min_size;
-                            let min_size = if with_min_size {
-                                Some(PhysicalSize::new(100, 100))
-                            } else {
-                                None
-                            };
-                            window.set_min_inner_size(min_size);
-                            eprintln!(
-                                "Min: {with_min_size}: {min_size:?} => {:?}",
-                                window.inner_size()
-                            );
-                        }
-                        "a" => {
-                            with_max_size = !with_max_size;
-                            let max_size = if with_max_size {
-                                Some(PhysicalSize::new(200, 200))
-                            } else {
-                                None
-                            };
-                            window.set_max_inner_size(max_size);
-                            eprintln!(
-                                "Max: {with_max_size}: {max_size:?} => {:?}",
-                                window.inner_size()
-                            );
-                        }
                         _ => (),
                     },
                     _ => (),
                 },
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
                 _ => (),
+            },
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
             }
+            _ => {}
         }
-    })
+    });
 }

examples/handling_close.rs

@@ -11,9 +11,9 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("Your faithful window")
@@ -22,65 +22,70 @@ fn main() -> Result<(), impl std::error::Error> {
 
     let mut close_requested = false;
 
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => {
-                    // `CloseRequested` is sent when the close button on the window is pressed (or
-                    // through whatever other mechanisms the window manager provides for closing a
-                    // window). If you don't handle this event, the close button won't actually do
-                    // anything.
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
 
-                    // A common thing to do here is prompt the user if they have unsaved work.
-                    // Creating a proper dialog box for that is far beyond the scope of this
-                    // example, so here we'll just respond to the Y and N keys.
-                    println!("Are you ready to bid your window farewell? [Y/N]");
-                    close_requested = true;
+        match event {
+            Event::WindowEvent { event, .. } => {
+                match event {
+                    WindowEvent::CloseRequested => {
+                        // `CloseRequested` is sent when the close button on the window is pressed (or
+                        // through whatever other mechanisms the window manager provides for closing a
+                        // window). If you don't handle this event, the close button won't actually do
+                        // anything.
 
-                    // In applications where you can safely close the window without further
-                    // action from the user, this is generally where you'd handle cleanup before
-                    // closing the window. How to close the window is detailed in the handler for
-                    // the Y key.
-                }
-                WindowEvent::KeyboardInput {
-                    event:
-                        KeyEvent {
-                            logical_key: key,
-                            state: ElementState::Released,
-                            ..
-                        },
-                    ..
-                } => {
-                    // WARNING: Consider using `key_without_modifers()` if available on your platform.
-                    // See the `key_binding` example
-                    match key.as_ref() {
-                        Key::Character("y") => {
-                            if close_requested {
-                                // This is where you'll want to do any cleanup you need.
-                                println!("Buh-bye!");
+                        // A common thing to do here is prompt the user if they have unsaved work.
+                        // Creating a proper dialog box for that is far beyond the scope of this
+                        // example, so here we'll just respond to the Y and N keys.
+                        println!("Are you ready to bid your window farewell? [Y/N]");
+                        close_requested = true;
 
-                                // For a single-window application like this, you'd normally just
-                                // break out of the event loop here. If you wanted to keep running the
-                                // event loop (i.e. if it's a multi-window application), you need to
-                                // drop the window. That closes it, and results in `Destroyed` being
-                                // sent.
-                                elwt.exit();
-                            }
-                        }
-                        Key::Character("n") => {
-                            if close_requested {
-                                println!("Your window will continue to stay by your side.");
-                                close_requested = false;
-                            }
-                        }
-                        _ => (),
+                        // In applications where you can safely close the window without further
+                        // action from the user, this is generally where you'd handle cleanup before
+                        // closing the window. How to close the window is detailed in the handler for
+                        // the Y key.
                     }
+                    WindowEvent::KeyboardInput {
+                        event:
+                            KeyEvent {
+                                logical_key: key,
+                                state: ElementState::Released,
+                                ..
+                            },
+                        ..
+                    } => {
+                        // WARNING: Consider using `key_without_modifers()` if available on your platform.
+                        // See the `key_binding` example
+                        match key.as_ref() {
+                            Key::Character("y") => {
+                                if close_requested {
+                                    // This is where you'll want to do any cleanup you need.
+                                    println!("Buh-bye!");
+
+                                    // For a single-window application like this, you'd normally just
+                                    // break out of the event loop here. If you wanted to keep running the
+                                    // event loop (i.e. if it's a multi-window application), you need to
+                                    // drop the window. That closes it, and results in `Destroyed` being
+                                    // sent.
+                                    control_flow.set_exit();
+                                }
+                            }
+                            Key::Character("n") => {
+                                if close_requested {
+                                    println!("Your window will continue to stay by your side.");
+                                    close_requested = false;
+                                }
+                            }
+                            _ => (),
+                        }
+                    }
+                    _ => (),
                 }
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
-                _ => (),
             }
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
+            }
+            _ => (),
         }
-    })
+    });
 }

examples/ime.rs

@@ -5,7 +5,7 @@ use simple_logger::SimpleLogger;
 use winit::{
     dpi::{PhysicalPosition, PhysicalSize},
     event::{ElementState, Event, Ime, WindowEvent},
-    event_loop::EventLoop,
+    event_loop::{ControlFlow, EventLoop},
     keyboard::{Key, KeyCode},
     window::{ImePurpose, WindowBuilder},
 };
@@ -13,7 +13,7 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new()
         .with_level(LevelFilter::Trace)
         .init()
@@ -24,7 +24,7 @@ fn main() -> Result<(), impl std::error::Error> {
     println!("Press F2 to toggle IME. See the documentation of `set_ime_allowed` for more info");
     println!("Press F3 to cycle through IME purposes.");
 
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_inner_size(winit::dpi::LogicalSize::new(256f64, 128f64))
@@ -39,56 +39,71 @@ fn main() -> Result<(), impl std::error::Error> {
     let mut cursor_position = PhysicalPosition::new(0.0, 0.0);
     let mut ime_pos = PhysicalPosition::new(0.0, 0.0);
 
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
-                WindowEvent::CursorMoved { position, .. } => {
-                    cursor_position = position;
-                }
-                WindowEvent::MouseInput {
-                    state: ElementState::Released,
-                    ..
-                } => {
-                    println!(
-                        "Setting ime position to {}, {}",
-                        cursor_position.x, cursor_position.y
-                    );
-                    ime_pos = cursor_position;
-                    if may_show_ime {
-                        window.set_ime_cursor_area(ime_pos, PhysicalSize::new(10, 10));
-                    }
-                }
-                WindowEvent::Ime(event) => {
-                    println!("{event:?}");
-                    may_show_ime = event != Ime::Disabled;
-                    if may_show_ime {
-                        window.set_ime_cursor_area(ime_pos, PhysicalSize::new(10, 10));
-                    }
-                }
-                WindowEvent::KeyboardInput { event, .. } => {
-                    println!("key: {event:?}");
-
-                    if event.state == ElementState::Pressed && event.physical_key == KeyCode::F2 {
-                        ime_allowed = !ime_allowed;
-                        window.set_ime_allowed(ime_allowed);
-                        println!("\nIME allowed: {ime_allowed}\n");
-                    }
-                    if event.state == ElementState::Pressed && event.logical_key == Key::F3 {
-                        ime_purpose = match ime_purpose {
-                            ImePurpose::Normal => ImePurpose::Password,
-                            ImePurpose::Password => ImePurpose::Terminal,
-                            _ => ImePurpose::Normal,
-                        };
-                        window.set_ime_purpose(ime_purpose);
-                        println!("\nIME purpose: {ime_purpose:?}\n");
-                    }
-                }
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
-                _ => (),
+    event_loop.run(move |event, _, control_flow| {
+        *control_flow = ControlFlow::Wait;
+        match event {
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => *control_flow = ControlFlow::Exit,
+            Event::WindowEvent {
+                event: WindowEvent::CursorMoved { position, .. },
+                ..
+            } => {
+                cursor_position = position;
             }
+            Event::WindowEvent {
+                event:
+                    WindowEvent::MouseInput {
+                        state: ElementState::Released,
+                        ..
+                    },
+                ..
+            } => {
+                println!(
+                    "Setting ime position to {}, {}",
+                    cursor_position.x, cursor_position.y
+                );
+                ime_pos = cursor_position;
+                if may_show_ime {
+                    window.set_ime_cursor_area(ime_pos, PhysicalSize::new(10, 10));
+                }
+            }
+            Event::WindowEvent {
+                event: WindowEvent::Ime(event),
+                ..
+            } => {
+                println!("{event:?}");
+                may_show_ime = event != Ime::Disabled;
+                if may_show_ime {
+                    window.set_ime_cursor_area(ime_pos, PhysicalSize::new(10, 10));
+                }
+            }
+            Event::WindowEvent {
+                event: WindowEvent::KeyboardInput { event, .. },
+                ..
+            } => {
+                println!("key: {event:?}");
+
+                if event.state == ElementState::Pressed && event.physical_key == KeyCode::F2 {
+                    ime_allowed = !ime_allowed;
+                    window.set_ime_allowed(ime_allowed);
+                    println!("\nIME allowed: {ime_allowed}\n");
+                }
+                if event.state == ElementState::Pressed && event.logical_key == Key::F3 {
+                    ime_purpose = match ime_purpose {
+                        ImePurpose::Normal => ImePurpose::Password,
+                        ImePurpose::Password => ImePurpose::Terminal,
+                        _ => ImePurpose::Normal,
+                    };
+                    window.set_ime_purpose(ime_purpose);
+                    println!("\nIME purpose: {ime_purpose:?}\n");
+                }
+            }
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
+            }
+            _ => (),
         }
-    })
+    });
 }

examples/key_binding.rs

@@ -4,7 +4,7 @@
 use winit::{
     dpi::LogicalSize,
     event::{ElementState, Event, WindowEvent},
-    event_loop::EventLoop,
+    event_loop::{ControlFlow, EventLoop},
     keyboard::{Key, ModifiersState},
     // WARNING: This is not available on all platforms (for example on the web).
     platform::modifier_supplement::KeyEventExtModifierSupplement,
@@ -17,12 +17,12 @@ fn main() {
 }
 
 #[cfg(any(target_os = "macos", target_os = "windows", target_os = "linux"))]
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     #[path = "util/fill.rs"]
     mod fill;
 
     simple_logger::SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_inner_size(LogicalSize::new(400.0, 200.0))
@@ -31,10 +31,12 @@ fn main() -> Result<(), impl std::error::Error> {
 
     let mut modifiers = ModifiersState::default();
 
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
+    event_loop.run(move |event, _, control_flow| {
+        *control_flow = ControlFlow::Wait;
+
+        match event {
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
                 WindowEvent::ModifiersChanged(new) => {
                     modifiers = new.state();
                 }
@@ -52,11 +54,12 @@ fn main() -> Result<(), impl std::error::Error> {
                         }
                     }
                 }
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
                 _ => (),
+            },
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
             }
+            _ => (),
         };
-    })
+    });
 }

examples/monitor_list.rs

@@ -7,7 +7,7 @@ use winit::{event_loop::EventLoop, window::WindowBuilder};
 
 fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
     let window = WindowBuilder::new().build(&event_loop).unwrap();
 
     if let Some(mon) = window.primary_monitor() {

examples/mouse_wheel.rs

@@ -10,9 +10,9 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("Mouse Wheel events")
@@ -34,10 +34,12 @@ In both cases the example window should move like the content of a scroll area i
 In other words, the deltas indicate the direction in which to move the content (in this case the window)."
     );
 
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
+
+        match event {
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::CloseRequested => control_flow.set_exit(),
                 WindowEvent::MouseWheel { delta, .. } => match delta {
                     winit::event::MouseScrollDelta::LineDelta(x, y) => {
                         println!("mouse wheel Line Delta: ({x},{y})");
@@ -55,11 +57,12 @@ In other words, the deltas indicate the direction in which to move the content (
                         window.set_outer_position(pos)
                     }
                 },
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
                 _ => (),
+            },
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
             }
+            _ => (),
         }
-    })
+    });
 }

examples/multithreaded.rs

@@ -1,7 +1,7 @@
 #![allow(clippy::single_match)]
 
 #[cfg(not(wasm_platform))]
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     use std::{collections::HashMap, sync::mpsc, thread, time::Duration};
 
     use simple_logger::SimpleLogger;
@@ -17,7 +17,7 @@ fn main() -> Result<(), impl std::error::Error> {
     const WINDOW_SIZE: PhysicalSize<u32> = PhysicalSize::new(600, 400);
 
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
     let mut window_senders = HashMap::with_capacity(WINDOW_COUNT);
     for _ in 0..WINDOW_COUNT {
         let window = WindowBuilder::new()
@@ -137,15 +137,13 @@ fn main() -> Result<(), impl std::error::Error> {
                                 }),
                                 "q" => window.request_redraw(),
                                 "r" => window.set_resizable(state),
-                                "s" => {
-                                    let _ = window.request_inner_size(match state {
-                                        true => PhysicalSize::new(
-                                            WINDOW_SIZE.width + 100,
-                                            WINDOW_SIZE.height + 100,
-                                        ),
-                                        false => WINDOW_SIZE,
-                                    });
-                                }
+                                "s" => window.set_inner_size(match state {
+                                    true => PhysicalSize::new(
+                                        WINDOW_SIZE.width + 100,
+                                        WINDOW_SIZE.height + 100,
+                                    ),
+                                    false => WINDOW_SIZE,
+                                }),
                                 "w" => {
                                     if let Size::Physical(size) = WINDOW_SIZE.into() {
                                         window
@@ -173,10 +171,11 @@ fn main() -> Result<(), impl std::error::Error> {
             }
         });
     }
-    event_loop.run(move |event, elwt| {
-        if window_senders.is_empty() {
-            elwt.exit()
-        }
+    event_loop.run(move |event, _event_loop, control_flow| {
+        match !window_senders.is_empty() {
+            true => control_flow.set_wait(),
+            false => control_flow.set_exit(),
+        };
         match event {
             Event::WindowEvent { event, window_id } => match event {
                 WindowEvent::CloseRequested
@@ -194,7 +193,9 @@ fn main() -> Result<(), impl std::error::Error> {
                 }
                 _ => {
                     if let Some(tx) = window_senders.get(&window_id) {
-                        tx.send(event).unwrap();
+                        if let Some(event) = event.to_static() {
+                            tx.send(event).unwrap();
+                        }
                     }
                 }
             },

examples/multiwindow.rs

@@ -13,9 +13,9 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let mut windows = HashMap::new();
     for _ in 0..3 {
@@ -26,40 +26,45 @@ fn main() -> Result<(), impl std::error::Error> {
 
     println!("Press N to open a new window.");
 
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, window_id } = event {
-            match event {
-                WindowEvent::CloseRequested => {
-                    println!("Window {window_id:?} has received the signal to close");
+    event_loop.run(move |event, event_loop, control_flow| {
+        control_flow.set_wait();
 
-                    // This drops the window, causing it to close.
-                    windows.remove(&window_id);
+        match event {
+            Event::WindowEvent { event, window_id } => {
+                match event {
+                    WindowEvent::CloseRequested => {
+                        println!("Window {window_id:?} has received the signal to close");
 
-                    if windows.is_empty() {
-                        elwt.exit();
+                        // This drops the window, causing it to close.
+                        windows.remove(&window_id);
+
+                        if windows.is_empty() {
+                            control_flow.set_exit();
+                        }
                     }
-                }
-                WindowEvent::KeyboardInput {
-                    event:
-                        KeyEvent {
-                            state: ElementState::Pressed,
-                            logical_key: Key::Character(c),
-                            ..
-                        },
-                    is_synthetic: false,
-                    ..
-                } if matches!(c.as_ref(), "n" | "N") => {
-                    let window = Window::new(elwt).unwrap();
-                    println!("Opened a new window: {:?}", window.id());
-                    windows.insert(window.id(), window);
-                }
-                WindowEvent::RedrawRequested => {
-                    if let Some(window) = windows.get(&window_id) {
-                        fill::fill_window(window);
+                    WindowEvent::KeyboardInput {
+                        event:
+                            KeyEvent {
+                                state: ElementState::Pressed,
+                                logical_key: Key::Character(c),
+                                ..
+                            },
+                        is_synthetic: false,
+                        ..
+                    } if matches!(c.as_ref(), "n" | "N") => {
+                        let window = Window::new(event_loop).unwrap();
+                        println!("Opened a new window: {:?}", window.id());
+                        windows.insert(window.id(), window);
                     }
+                    _ => (),
                 }
-                _ => (),
             }
+            Event::RedrawRequested(window_id) => {
+                if let Some(window) = windows.get(&window_id) {
+                    fill::fill_window(window);
+                }
+            }
+            _ => (),
         }
     })
 }

examples/request_redraw.rs

@@ -10,33 +10,36 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("A fantastic window!")
         .build(&event_loop)
         .unwrap();
 
-    event_loop.run(move |event, elwt| {
+    event_loop.run(move |event, _, control_flow| {
         println!("{event:?}");
 
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
+        control_flow.set_wait();
+
+        match event {
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::CloseRequested => control_flow.set_exit(),
                 WindowEvent::MouseInput {
                     state: ElementState::Released,
                     ..
                 } => {
                     window.request_redraw();
                 }
-                WindowEvent::RedrawRequested => {
-                    println!("\nredrawing!\n");
-                    fill::fill_window(&window);
-                }
                 _ => (),
+            },
+            Event::RedrawRequested(_) => {
+                println!("\nredrawing!\n");
+                fill::fill_window(&window);
             }
+            _ => (),
         }
-    })
+    });
 }

examples/request_redraw_threaded.rs

@@ -1,7 +1,7 @@
 #![allow(clippy::single_match)]
 
 #[cfg(not(wasm_platform))]
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     use std::{sync::Arc, thread, time};
 
     use simple_logger::SimpleLogger;
@@ -15,7 +15,7 @@ fn main() -> Result<(), impl std::error::Error> {
     mod fill;
 
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = {
         let window = WindowBuilder::new()
@@ -33,24 +33,23 @@ fn main() -> Result<(), impl std::error::Error> {
         }
     });
 
-    event_loop.run(move |event, elwt| {
+    event_loop.run(move |event, _, control_flow| {
         println!("{event:?}");
 
+        control_flow.set_wait();
+
         match event {
             Event::WindowEvent {
                 event: WindowEvent::CloseRequested,
                 ..
-            } => elwt.exit(),
-            Event::WindowEvent {
-                event: WindowEvent::RedrawRequested,
-                ..
-            } => {
+            } => control_flow.set_exit(),
+            Event::RedrawRequested(_) => {
                 println!("\nredrawing!\n");
                 fill::fill_window(&window);
             }
             _ => (),
         }
-    })
+    });
 }
 
 #[cfg(wasm_platform)]

examples/resizable.rs

@@ -12,9 +12,9 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let mut resizable = false;
 
@@ -27,10 +27,12 @@ fn main() -> Result<(), impl std::error::Error> {
         .build(&event_loop)
         .unwrap();
 
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
+
+        match event {
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::CloseRequested => control_flow.set_exit(),
                 WindowEvent::KeyboardInput {
                     event:
                         KeyEvent {
@@ -44,11 +46,12 @@ fn main() -> Result<(), impl std::error::Error> {
                     println!("Resizable: {resizable}");
                     window.set_resizable(resizable);
                 }
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
                 _ => (),
+            },
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
             }
+            _ => (),
         };
-    })
+    });
 }

examples/startup_notification.rs

@@ -1,117 +0,0 @@
-//! Demonstrates the use of startup notifications on Linux.
-
-#[cfg(any(x11_platform, wayland_platform))]
-#[path = "./util/fill.rs"]
-mod fill;
-
-#[cfg(any(x11_platform, wayland_platform))]
-mod example {
-    use std::collections::HashMap;
-    use std::rc::Rc;
-
-    use winit::event::{ElementState, Event, KeyEvent, WindowEvent};
-    use winit::event_loop::EventLoop;
-    use winit::keyboard::Key;
-    use winit::platform::startup_notify::{
-        EventLoopExtStartupNotify, WindowBuilderExtStartupNotify, WindowExtStartupNotify,
-    };
-    use winit::window::{Window, WindowBuilder, WindowId};
-
-    pub(super) fn main() -> Result<(), impl std::error::Error> {
-        // Create the event loop and get the activation token.
-        let event_loop = EventLoop::new().unwrap();
-        let mut current_token = match event_loop.read_token_from_env() {
-            Some(token) => Some(token),
-            None => {
-                println!("No startup notification token found in environment.");
-                None
-            }
-        };
-
-        let mut windows: HashMap<WindowId, Rc<Window>> = HashMap::new();
-        let mut counter = 0;
-        let mut create_first_window = false;
-
-        event_loop.run(move |event, elwt| {
-            match event {
-                Event::Resumed => create_first_window = true,
-
-                Event::WindowEvent { window_id, event } => match event {
-                    WindowEvent::KeyboardInput {
-                        event:
-                            KeyEvent {
-                                logical_key,
-                                state: ElementState::Pressed,
-                                ..
-                            },
-                        ..
-                    } => {
-                        if logical_key == Key::Character("n".into()) {
-                            if let Some(window) = windows.get(&window_id) {
-                                // Request a new activation token on this window.
-                                // Once we get it we will use it to create a window.
-                                window
-                                    .request_activation_token()
-                                    .expect("Failed to request activation token.");
-                            }
-                        }
-                    }
-
-                    WindowEvent::CloseRequested => {
-                        // Remove the window from the map.
-                        windows.remove(&window_id);
-                        if windows.is_empty() {
-                            elwt.exit();
-                            return;
-                        }
-                    }
-
-                    WindowEvent::ActivationTokenDone { token, .. } => {
-                        current_token = Some(token);
-                    }
-
-                    WindowEvent::RedrawRequested => {
-                        if let Some(window) = windows.get(&window_id) {
-                            super::fill::fill_window(window);
-                        }
-                    }
-
-                    _ => {}
-                },
-                _ => (),
-            }
-
-            // See if we've passed the deadline.
-            if current_token.is_some() || create_first_window {
-                // Create the initial window.
-                let window = {
-                    let mut builder =
-                        WindowBuilder::new().with_title(format!("Window {}", counter));
-
-                    if let Some(token) = current_token.take() {
-                        println!("Creating a window with token {token:?}");
-                        builder = builder.with_activation_token(token);
-                    }
-
-                    Rc::new(builder.build(elwt).unwrap())
-                };
-
-                // Add the window to the map.
-                windows.insert(window.id(), window.clone());
-
-                counter += 1;
-                create_first_window = false;
-            }
-        })
-    }
-}
-
-#[cfg(any(x11_platform, wayland_platform))]
-fn main() -> Result<(), impl std::error::Error> {
-    example::main()
-}
-
-#[cfg(not(any(x11_platform, wayland_platform)))]
-fn main() {
-    println!("This example is only supported on X11 and Wayland platforms.");
-}

examples/theme.rs

@@ -3,7 +3,7 @@
 use simple_logger::SimpleLogger;
 use winit::{
     event::{ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::EventLoop,
+    event_loop::{ControlFlow, EventLoop},
     keyboard::Key,
     window::{Theme, WindowBuilder},
 };
@@ -11,9 +11,9 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("A fantastic window!")
@@ -27,42 +27,53 @@ fn main() -> Result<(), impl std::error::Error> {
     println!("  (L) Light theme");
     println!("  (D) Dark theme");
 
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { window_id, event } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
-                WindowEvent::ThemeChanged(theme) if window_id == window.id() => {
-                    println!("Theme is changed: {theme:?}")
+    event_loop.run(move |event, _, control_flow| {
+        *control_flow = ControlFlow::Wait;
+
+        match event {
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => *control_flow = ControlFlow::Exit,
+            Event::WindowEvent {
+                event: WindowEvent::ThemeChanged(theme),
+                window_id,
+                ..
+            } if window_id == window.id() => {
+                println!("Theme is changed: {theme:?}")
+            }
+            Event::WindowEvent {
+                event:
+                    WindowEvent::KeyboardInput {
+                        event:
+                            KeyEvent {
+                                logical_key: key,
+                                state: ElementState::Pressed,
+                                ..
+                            },
+                        ..
+                    },
+                ..
+            } => match key.as_ref() {
+                Key::Character("A" | "a") => {
+                    println!("Theme was: {:?}", window.theme());
+                    window.set_theme(None);
                 }
-                WindowEvent::KeyboardInput {
-                    event:
-                        KeyEvent {
-                            logical_key: key,
-                            state: ElementState::Pressed,
-                            ..
-                        },
-                    ..
-                } => match key.as_ref() {
-                    Key::Character("A" | "a") => {
-                        println!("Theme was: {:?}", window.theme());
-                        window.set_theme(None);
-                    }
-                    Key::Character("L" | "l") => {
-                        println!("Theme was: {:?}", window.theme());
-                        window.set_theme(Some(Theme::Light));
-                    }
-                    Key::Character("D" | "d") => {
-                        println!("Theme was: {:?}", window.theme());
-                        window.set_theme(Some(Theme::Dark));
-                    }
-                    _ => (),
-                },
-                WindowEvent::RedrawRequested => {
-                    println!("\nredrawing!\n");
-                    fill::fill_window(&window);
+                Key::Character("L" | "l") => {
+                    println!("Theme was: {:?}", window.theme());
+                    window.set_theme(Some(Theme::Light));
+                }
+                Key::Character("D" | "d") => {
+                    println!("Theme was: {:?}", window.theme());
+                    window.set_theme(Some(Theme::Dark));
                 }
                 _ => (),
+            },
+            Event::RedrawRequested(_) => {
+                println!("\nredrawing!\n");
+                fill::fill_window(&window);
             }
+            _ => (),
         }
-    })
+    });
 }

examples/timer.rs

@@ -9,16 +9,16 @@ use web_time::Instant;
 use simple_logger::SimpleLogger;
 use winit::{
     event::{Event, StartCause, WindowEvent},
-    event_loop::{ControlFlow, EventLoop},
+    event_loop::EventLoop,
     window::WindowBuilder,
 };
 
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("A fantastic window!")
@@ -27,28 +27,25 @@ fn main() -> Result<(), impl std::error::Error> {
 
     let timer_length = Duration::new(1, 0);
 
-    event_loop.run(move |event, elwt| {
+    event_loop.run(move |event, _, control_flow| {
         println!("{event:?}");
 
         match event {
             Event::NewEvents(StartCause::Init) => {
-                elwt.set_control_flow(ControlFlow::WaitUntil(Instant::now() + timer_length));
+                control_flow.set_wait_until(Instant::now() + timer_length);
             }
             Event::NewEvents(StartCause::ResumeTimeReached { .. }) => {
-                elwt.set_control_flow(ControlFlow::WaitUntil(Instant::now() + timer_length));
+                control_flow.set_wait_until(Instant::now() + timer_length);
                 println!("\nTimer\n");
             }
             Event::WindowEvent {
                 event: WindowEvent::CloseRequested,
                 ..
-            } => elwt.exit(),
-            Event::WindowEvent {
-                event: WindowEvent::RedrawRequested,
-                ..
-            } => {
+            } => control_flow.set_exit(),
+            Event::RedrawRequested(_) => {
                 fill::fill_window(&window);
             }
             _ => (),
         }
-    })
+    });
 }

examples/touchpad_gestures.rs

@@ -1,16 +1,16 @@
 use simple_logger::SimpleLogger;
 use winit::{
     event::{Event, WindowEvent},
-    event_loop::EventLoop,
+    event_loop::{ControlFlow, EventLoop},
     window::WindowBuilder,
 };
 
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("Touchpad gestures")
@@ -19,10 +19,12 @@ fn main() -> Result<(), impl std::error::Error> {
 
     println!("Only supported on macOS at the moment.");
 
-    event_loop.run(move |event, elwt| {
+    event_loop.run(move |event, _, control_flow| {
+        *control_flow = ControlFlow::Wait;
+
         if let Event::WindowEvent { event, .. } = event {
             match event {
-                WindowEvent::CloseRequested => elwt.exit(),
+                WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
                 WindowEvent::TouchpadMagnify { delta, .. } => {
                     if delta > 0.0 {
                         println!("Zoomed in {delta}");
@@ -40,11 +42,10 @@ fn main() -> Result<(), impl std::error::Error> {
                         println!("Rotated clockwise {delta}");
                     }
                 }
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
                 _ => (),
             }
+        } else if let Event::RedrawRequested(_) = event {
+            fill::fill_window(&window);
         }
-    })
+    });
 }

examples/transparent.rs

@@ -10,9 +10,9 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_decorations(false)
@@ -22,17 +22,19 @@ fn main() -> Result<(), impl std::error::Error> {
 
     window.set_title("A fantastic window!");
 
-    event_loop.run(move |event, elwt| {
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
         println!("{event:?}");
 
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
-                _ => (),
+        match event {
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                ..
+            } => control_flow.set_exit(),
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
             }
+            _ => (),
         }
-    })
+    });
 }

examples/util/fill.rs

@@ -9,7 +9,7 @@
 
 use winit::window::Window;
 
-#[cfg(all(feature = "rwh_05", not(any(target_os = "android", target_os = "ios"))))]
+#[cfg(not(any(target_os = "android", target_os = "ios")))]
 pub(super) fn fill_window(window: &Window) {
     use softbuffer::{Context, Surface};
     use std::cell::RefCell;
@@ -80,7 +80,7 @@ pub(super) fn fill_window(window: &Window) {
     })
 }
 
-#[cfg(not(all(feature = "rwh_05", not(any(target_os = "android", target_os = "ios")))))]
+#[cfg(any(target_os = "android", target_os = "ios"))]
 pub(super) fn fill_window(_window: &Window) {
     // No-op on mobile platforms.
 }

examples/video_modes.rs

@@ -5,7 +5,7 @@ use winit::event_loop::EventLoop;
 
 fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
     let monitor = match event_loop.primary_monitor() {
         Some(monitor) => monitor,
         None => {

examples/web.rs

@@ -7,21 +7,20 @@ use winit::{
     window::{Fullscreen, WindowBuilder},
 };
 
-pub fn main() -> Result<(), impl std::error::Error> {
-    let event_loop = EventLoop::new().unwrap();
+pub fn main() {
+    let event_loop = EventLoop::new();
 
-    let builder = WindowBuilder::new().with_title("A fantastic window!");
-    #[cfg(wasm_platform)]
-    let builder = {
-        use winit::platform::web::WindowBuilderExtWebSys;
-        builder.with_append(true)
-    };
-    let window = builder.build(&event_loop).unwrap();
+    let window = WindowBuilder::new()
+        .with_title("A fantastic window!")
+        .build(&event_loop)
+        .unwrap();
 
     #[cfg(wasm_platform)]
     let log_list = wasm::insert_canvas_and_create_log_list(&window);
 
-    event_loop.run(move |event, elwt| {
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
+
         #[cfg(wasm_platform)]
         wasm::log_event(&log_list, &event);
 
@@ -29,8 +28,8 @@ pub fn main() -> Result<(), impl std::error::Error> {
             Event::WindowEvent {
                 event: WindowEvent::CloseRequested,
                 window_id,
-            } if window_id == window.id() => elwt.exit(),
-            Event::AboutToWait => {
+            } if window_id == window.id() => control_flow.set_exit(),
+            Event::MainEventsCleared => {
                 window.request_redraw();
             }
             Event::WindowEvent {
@@ -54,52 +53,37 @@ pub fn main() -> Result<(), impl std::error::Error> {
             }
             _ => (),
         }
-    })
+    });
 }
 
 #[cfg(wasm_platform)]
 mod wasm {
-    use std::num::NonZeroU32;
-
-    use softbuffer::{Surface, SurfaceExtWeb};
     use wasm_bindgen::prelude::*;
-    use winit::{
-        event::{Event, WindowEvent},
-        window::Window,
-    };
+    use winit::{event::Event, window::Window};
 
     #[wasm_bindgen(start)]
     pub fn run() {
         console_log::init_with_level(log::Level::Debug).expect("error initializing logger");
 
         #[allow(clippy::main_recursion)]
-        let _ = super::main();
+        super::main();
     }
 
     pub fn insert_canvas_and_create_log_list(window: &Window) -> web_sys::Element {
         use winit::platform::web::WindowExtWebSys;
 
         let canvas = window.canvas().unwrap();
-        let mut surface = Surface::from_canvas(canvas.clone()).unwrap();
-        surface
-            .resize(
-                NonZeroU32::new(canvas.width()).unwrap(),
-                NonZeroU32::new(canvas.height()).unwrap(),
-            )
-            .unwrap();
-        let mut buffer = surface.buffer_mut().unwrap();
-        buffer.fill(0xFFF0000);
-        buffer.present().unwrap();
 
         let window = web_sys::window().unwrap();
         let document = window.document().unwrap();
         let body = document.body().unwrap();
 
-        let style = &canvas.style();
-        style.set_property("margin", "50px").unwrap();
-        // Use to test interactions with border and padding.
-        //style.set_property("border", "50px solid black").unwrap();
-        //style.set_property("padding", "50px").unwrap();
+        // Set a background color for the canvas to make it easier to tell where the canvas is for debugging purposes.
+        canvas
+            .style()
+            .set_property("background-color", "crimson")
+            .unwrap();
+        body.append_child(&canvas).unwrap();
 
         let log_header = document.create_element("h2").unwrap();
         log_header.set_text_content(Some("Event Log"));
@@ -116,29 +100,11 @@ mod wasm {
         // Getting access to browser logs requires a lot of setup on mobile devices.
         // So we implement this basic logging system into the page to give developers an easy alternative.
         // As a bonus its also kind of handy on desktop.
-        let event = match event {
-            Event::WindowEvent {
-                event: WindowEvent::RedrawRequested,
-                ..
-            } => None,
-            Event::WindowEvent { event, .. } => Some(format!("{event:?}")),
-            Event::Resumed | Event::Suspended => Some(format!("{event:?}")),
-            _ => None,
-        };
-        if let Some(event) = event {
+        if let Event::WindowEvent { event, .. } = &event {
             let window = web_sys::window().unwrap();
             let document = window.document().unwrap();
             let log = document.create_element("li").unwrap();
-
-            let date = js_sys::Date::new_0();
-            log.set_text_content(Some(&format!(
-                "{:02}:{:02}:{:02}.{:03}: {event}",
-                date.get_hours(),
-                date.get_minutes(),
-                date.get_seconds(),
-                date.get_milliseconds(),
-            )));
-
+            log.set_text_content(Some(&format!("{event:?}")));
             log_list
                 .insert_before(&log, log_list.first_child().as_ref())
                 .unwrap();

examples/web_aspect_ratio.rs

@@ -12,8 +12,7 @@ mod wasm {
     use winit::{
         dpi::PhysicalSize,
         event::{Event, WindowEvent},
-        event_loop::EventLoop,
-        platform::web::WindowBuilderExtWebSys,
+        event_loop::{ControlFlow, EventLoop},
         window::{Window, WindowBuilder},
     };
 
@@ -31,14 +30,13 @@ This example demonstrates the desired future functionality which will possibly b
     #[wasm_bindgen(start)]
     pub fn run() {
         console_log::init_with_level(log::Level::Debug).expect("error initializing logger");
-        let event_loop = EventLoop::new().unwrap();
+        let event_loop = EventLoop::new();
 
         let window = WindowBuilder::new()
             .with_title("A fantastic window!")
             // When running in a non-wasm environment this would set the window size to 100x100.
             // However in this example it just sets a default initial size of 100x100 that is immediately overwritten due to the layout + styling of the page.
             .with_inner_size(PhysicalSize::new(100, 100))
-            .with_append(true)
             .build(&event_loop)
             .unwrap();
 
@@ -47,14 +45,18 @@ This example demonstrates the desired future functionality which will possibly b
         // Render once with the size info we currently have
         render_circle(&canvas, window.inner_size());
 
-        let _ = event_loop.run(move |event, _| match event {
-            Event::WindowEvent {
-                event: WindowEvent::Resized(resize),
-                window_id,
-            } if window_id == window.id() => {
-                render_circle(&canvas, resize);
+        event_loop.run(move |event, _, control_flow| {
+            *control_flow = ControlFlow::Wait;
+
+            match event {
+                Event::WindowEvent {
+                    event: WindowEvent::Resized(resize),
+                    window_id,
+                } if window_id == window.id() => {
+                    render_circle(&canvas, resize);
+                }
+                _ => (),
             }
-            _ => (),
         });
     }
 
@@ -70,6 +72,7 @@ This example demonstrates the desired future functionality which will possibly b
         canvas
             .style()
             .set_css_text("display: block; background-color: crimson; margin: auto; width: 50%; aspect-ratio: 4 / 1;");
+        body.append_child(&canvas).unwrap();
 
         let explanation = document.create_element("pre").unwrap();
         explanation.set_text_content(Some(EXPLANATION));

examples/window.rs

@@ -10,9 +10,9 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("A fantastic window!")
@@ -20,24 +20,22 @@ fn main() -> Result<(), impl std::error::Error> {
         .build(&event_loop)
         .unwrap();
 
-    event_loop.run(move |event, elwt| {
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
         println!("{event:?}");
 
         match event {
-            Event::WindowEvent { event, window_id } if window_id == window.id() => match event {
-                WindowEvent::CloseRequested => elwt.exit(),
-                WindowEvent::RedrawRequested => {
-                    // Notify the windowing system that we'll be presenting to the window.
-                    window.pre_present_notify();
-                    fill::fill_window(&window);
-                }
-                _ => (),
-            },
-            Event::AboutToWait => {
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                window_id,
+            } if window_id == window.id() => control_flow.set_exit(),
+            Event::MainEventsCleared => {
                 window.request_redraw();
             }
-
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
+            }
             _ => (),
         }
-    })
+    });
 }

examples/window_buttons.rs

@@ -14,9 +14,9 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("A fantastic window!")
@@ -31,38 +31,45 @@ fn main() -> Result<(), impl std::error::Error> {
 
     event_loop.listen_device_events(DeviceEvents::Always);
 
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { window_id, event } = event {
-            match event {
-                WindowEvent::KeyboardInput {
-                    event:
-                        KeyEvent {
-                            logical_key: key,
-                            state: ElementState::Pressed,
-                            ..
-                        },
-                    ..
-                } => match key.as_ref() {
-                    Key::Character("F" | "f") => {
-                        let buttons = window.enabled_buttons();
-                        window.set_enabled_buttons(buttons ^ WindowButtons::CLOSE);
-                    }
-                    Key::Character("G" | "g") => {
-                        let buttons = window.enabled_buttons();
-                        window.set_enabled_buttons(buttons ^ WindowButtons::MAXIMIZE);
-                    }
-                    Key::Character("H" | "h") => {
-                        let buttons = window.enabled_buttons();
-                        window.set_enabled_buttons(buttons ^ WindowButtons::MINIMIZE);
-                    }
-                    _ => (),
-                },
-                WindowEvent::CloseRequested if window_id == window.id() => elwt.exit(),
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
+
+        match event {
+            Event::WindowEvent {
+                event:
+                    WindowEvent::KeyboardInput {
+                        event:
+                            KeyEvent {
+                                logical_key: key,
+                                state: ElementState::Pressed,
+                                ..
+                            },
+                        ..
+                    },
+                ..
+            } => match key.as_ref() {
+                Key::Character("F" | "f") => {
+                    let buttons = window.enabled_buttons();
+                    window.set_enabled_buttons(buttons ^ WindowButtons::CLOSE);
+                }
+                Key::Character("G" | "g") => {
+                    let buttons = window.enabled_buttons();
+                    window.set_enabled_buttons(buttons ^ WindowButtons::MAXIMIZE);
+                }
+                Key::Character("H" | "h") => {
+                    let buttons = window.enabled_buttons();
+                    window.set_enabled_buttons(buttons ^ WindowButtons::MINIMIZE);
                 }
                 _ => (),
+            },
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                window_id,
+            } if window_id == window.id() => control_flow.set_exit(),
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
             }
+            _ => (),
         }
-    })
+    });
 }

examples/window_debug.rs

@@ -14,9 +14,9 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("A fantastic window!")
@@ -38,7 +38,9 @@ fn main() -> Result<(), impl std::error::Error> {
 
     event_loop.listen_device_events(DeviceEvents::Always);
 
-    event_loop.run(move |event, elwt| {
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
+
         match event {
             // This used to use the virtual key, but the new API
             // only provides the `physical_key` (`Code`).
@@ -66,72 +68,76 @@ fn main() -> Result<(), impl std::error::Error> {
                 }
                 _ => (),
             },
-            Event::WindowEvent { window_id, event } => match event {
-                WindowEvent::KeyboardInput {
-                    event:
-                        KeyEvent {
-                            logical_key: Key::Character(key_str),
-                            state: ElementState::Pressed,
-                            ..
-                        },
-                    ..
-                } => match key_str.as_ref() {
-                    // WARNING: Consider using `key_without_modifers()` if available on your platform.
-                    // See the `key_binding` example
-                    "e" => {
-                        fn area(size: PhysicalSize<u32>) -> u32 {
-                            size.width * size.height
-                        }
+            Event::WindowEvent {
+                event:
+                    WindowEvent::KeyboardInput {
+                        event:
+                            KeyEvent {
+                                logical_key: Key::Character(key_str),
+                                state: ElementState::Pressed,
+                                ..
+                            },
+                        ..
+                    },
+                ..
+            } => match key_str.as_ref() {
+                // WARNING: Consider using `key_without_modifers()` if available on your platform.
+                // See the `key_binding` example
+                "e" => {
+                    fn area(size: PhysicalSize<u32>) -> u32 {
+                        size.width * size.height
+                    }
 
-                        let monitor = window.current_monitor().unwrap();
-                        if let Some(mode) = monitor
-                            .video_modes()
-                            .max_by(|a, b| area(a.size()).cmp(&area(b.size())))
-                        {
-                            window.set_fullscreen(Some(Fullscreen::Exclusive(mode)));
-                        } else {
-                            eprintln!("no video modes available");
-                        }
+                    let monitor = window.current_monitor().unwrap();
+                    if let Some(mode) = monitor
+                        .video_modes()
+                        .max_by(|a, b| area(a.size()).cmp(&area(b.size())))
+                    {
+                        window.set_fullscreen(Some(Fullscreen::Exclusive(mode)));
+                    } else {
+                        eprintln!("no video modes available");
                     }
-                    "f" => {
-                        if window.fullscreen().is_some() {
-                            window.set_fullscreen(None);
-                        } else {
-                            let monitor = window.current_monitor();
-                            window.set_fullscreen(Some(Fullscreen::Borderless(monitor)));
-                        }
+                }
+                "f" => {
+                    if window.fullscreen().is_some() {
+                        window.set_fullscreen(None);
+                    } else {
+                        let monitor = window.current_monitor();
+                        window.set_fullscreen(Some(Fullscreen::Borderless(monitor)));
                     }
-                    "p" => {
-                        if window.fullscreen().is_some() {
-                            window.set_fullscreen(None);
-                        } else {
-                            window.set_fullscreen(Some(Fullscreen::Borderless(None)));
-                        }
+                }
+                "p" => {
+                    if window.fullscreen().is_some() {
+                        window.set_fullscreen(None);
+                    } else {
+                        window.set_fullscreen(Some(Fullscreen::Borderless(None)));
                     }
-                    "m" => {
-                        minimized = !minimized;
-                        window.set_minimized(minimized);
-                    }
-                    "q" => {
-                        elwt.exit();
-                    }
-                    "v" => {
-                        visible = !visible;
-                        window.set_visible(visible);
-                    }
-                    "x" => {
-                        let is_maximized = window.is_maximized();
-                        window.set_maximized(!is_maximized);
-                    }
-                    _ => (),
-                },
-                WindowEvent::CloseRequested if window_id == window.id() => elwt.exit(),
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
+                }
+                "m" => {
+                    minimized = !minimized;
+                    window.set_minimized(minimized);
+                }
+                "q" => {
+                    control_flow.set_exit();
+                }
+                "v" => {
+                    visible = !visible;
+                    window.set_visible(visible);
+                }
+                "x" => {
+                    let is_maximized = window.is_maximized();
+                    window.set_maximized(!is_maximized);
                 }
                 _ => (),
             },
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                window_id,
+            } if window_id == window.id() => control_flow.set_exit(),
+            Event::RedrawRequested(_) => {
+                fill::fill_window(&window);
+            }
             _ => (),
         }
-    })
+    });
 }

examples/window_drag_resize.rs

@@ -3,7 +3,7 @@
 use simple_logger::SimpleLogger;
 use winit::{
     event::{ElementState, Event, KeyEvent, MouseButton, StartCause, WindowEvent},
-    event_loop::EventLoop,
+    event_loop::{ControlFlow, EventLoop},
     keyboard::Key,
     window::{CursorIcon, ResizeDirection, WindowBuilder},
 };
@@ -13,9 +13,9 @@ const BORDER: f64 = 8.0;
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_inner_size(winit::dpi::LogicalSize::new(600.0, 400.0))
@@ -27,12 +27,12 @@ fn main() -> Result<(), impl std::error::Error> {
     let mut border = false;
     let mut cursor_location = None;
 
-    event_loop.run(move |event, elwt| match event {
+    event_loop.run(move |event, _, control_flow| match event {
         Event::NewEvents(StartCause::Init) => {
             eprintln!("Press 'B' to toggle borderless")
         }
         Event::WindowEvent { event, .. } => match event {
-            WindowEvent::CloseRequested => elwt.exit(),
+            WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
             WindowEvent::CursorMoved { position, .. } => {
                 if !window.is_decorated() {
                     let new_location =
@@ -52,8 +52,6 @@ fn main() -> Result<(), impl std::error::Error> {
             } => {
                 if let Some(dir) = cursor_location {
                     let _res = window.drag_resize_window(dir);
-                } else if !window.is_decorated() {
-                    let _res = window.drag_window();
                 }
             }
             WindowEvent::KeyboardInput {
@@ -68,14 +66,13 @@ fn main() -> Result<(), impl std::error::Error> {
                 border = !border;
                 window.set_decorations(border);
             }
-            WindowEvent::RedrawRequested => {
-                fill::fill_window(&window);
-            }
             _ => (),
         },
-
+        Event::RedrawRequested(_) => {
+            fill::fill_window(&window);
+        }
         _ => (),
-    })
+    });
 }
 
 fn cursor_direction_icon(resize_direction: Option<ResizeDirection>) -> CursorIcon {

examples/window_icon.rs

@@ -4,7 +4,7 @@ use std::path::Path;
 
 use simple_logger::SimpleLogger;
 use winit::{
-    event::{Event, WindowEvent},
+    event::Event,
     event_loop::EventLoop,
     window::{Icon, WindowBuilder},
 };
@@ -12,7 +12,7 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
 
     // You'll have to choose an icon size at your own discretion. On X11, the desired size varies
@@ -23,7 +23,7 @@ fn main() -> Result<(), impl std::error::Error> {
 
     let icon = load_icon(Path::new(path));
 
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("An iconic window!")
@@ -33,18 +33,22 @@ fn main() -> Result<(), impl std::error::Error> {
         .build(&event_loop)
         .unwrap();
 
-    event_loop.run(move |event, elwt| {
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
+
         if let Event::WindowEvent { event, .. } = event {
+            use winit::event::WindowEvent::*;
             match event {
-                WindowEvent::CloseRequested => elwt.exit(),
-                WindowEvent::DroppedFile(path) => {
+                CloseRequested => control_flow.set_exit(),
+                DroppedFile(path) => {
                     window.set_window_icon(Some(load_icon(&path)));
                 }
-                WindowEvent::RedrawRequested => fill::fill_window(&window),
                 _ => (),
             }
+        } else if let Event::RedrawRequested(_) = event {
+            fill::fill_window(&window);
         }
-    })
+    });
 }
 
 fn load_icon(path: &Path) -> Icon {

examples/window_on_demand.rs

@@ -1,92 +0,0 @@
-#![allow(clippy::single_match)]
-
-// Limit this example to only compatible platforms.
-#[cfg(any(windows_platform, macos_platform, x11_platform, wayland_platform,))]
-fn main() -> Result<(), impl std::error::Error> {
-    use std::time::Duration;
-
-    use simple_logger::SimpleLogger;
-
-    use winit::{
-        error::EventLoopError,
-        event::{Event, WindowEvent},
-        event_loop::EventLoop,
-        platform::run_on_demand::EventLoopExtRunOnDemand,
-        window::{Window, WindowBuilder, WindowId},
-    };
-
-    #[path = "util/fill.rs"]
-    mod fill;
-
-    #[derive(Default)]
-    struct App {
-        window_id: Option<WindowId>,
-        window: Option<Window>,
-    }
-
-    SimpleLogger::new().init().unwrap();
-    let mut event_loop = EventLoop::new().unwrap();
-
-    fn run_app(event_loop: &mut EventLoop<()>, idx: usize) -> Result<(), EventLoopError> {
-        let mut app = App::default();
-
-        event_loop.run_on_demand(move |event, elwt| {
-            println!("Run {idx}: {:?}", event);
-
-            if let Some(window) = &app.window {
-                match event {
-                    Event::WindowEvent {
-                        event: WindowEvent::CloseRequested,
-                        window_id,
-                    } if window.id() == window_id => {
-                        println!("--------------------------------------------------------- Window {idx} CloseRequested");
-                        app.window = None;
-                    }
-                    Event::AboutToWait => window.request_redraw(),
-                    Event::WindowEvent {
-                        event: WindowEvent::RedrawRequested,
-                        ..
-                    }  => {
-                        fill::fill_window(window);
-                    }
-                    _ => (),
-                }
-            } else if let Some(id) = app.window_id {
-                match event {
-                    Event::WindowEvent {
-                        event: WindowEvent::Destroyed,
-                        window_id,
-                    } if id == window_id => {
-                        println!("--------------------------------------------------------- Window {idx} Destroyed");
-                        app.window_id = None;
-                        elwt.exit();
-                    }
-                    _ => (),
-                }
-            } else if let Event::Resumed = event {
-                let window = WindowBuilder::new()
-                        .with_title("Fantastic window number one!")
-                        .with_inner_size(winit::dpi::LogicalSize::new(128.0, 128.0))
-                        .build(elwt)
-                        .unwrap();
-                app.window_id = Some(window.id());
-                app.window = Some(window);
-            }
-        })
-    }
-
-    run_app(&mut event_loop, 1)?;
-
-    println!("--------------------------------------------------------- Finished first loop");
-    println!("--------------------------------------------------------- Waiting 5 seconds");
-    std::thread::sleep(Duration::from_secs(5));
-
-    let ret = run_app(&mut event_loop, 2);
-    println!("--------------------------------------------------------- Finished second loop");
-    ret
-}
-
-#[cfg(not(any(windows_platform, macos_platform, x11_platform, wayland_platform,)))]
-fn main() {
-    println!("This example is not supported on this platform");
-}

examples/window_option_as_alt.rs

@@ -18,8 +18,8 @@ mod fill;
 /// Prints the keyboard events characters received when option_is_alt is true versus false.
 /// A left mouse click will toggle option_is_alt.
 #[cfg(target_os = "macos")]
-fn main() -> Result<(), impl std::error::Error> {
-    let event_loop = EventLoop::new().unwrap();
+fn main() {
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("A fantastic window!")
@@ -31,39 +31,42 @@ fn main() -> Result<(), impl std::error::Error> {
 
     let mut option_as_alt = window.option_as_alt();
 
-    event_loop.run(move |event, elwt| match event {
-        Event::WindowEvent {
-            event: WindowEvent::CloseRequested,
-            window_id,
-        } if window_id == window.id() => elwt.exit(),
-        Event::WindowEvent { event, .. } => match event {
-            WindowEvent::MouseInput {
-                state: ElementState::Pressed,
-                button: MouseButton::Left,
-                ..
-            } => {
-                option_as_alt = match option_as_alt {
-                    OptionAsAlt::None => OptionAsAlt::OnlyLeft,
-                    OptionAsAlt::OnlyLeft => OptionAsAlt::OnlyRight,
-                    OptionAsAlt::OnlyRight => OptionAsAlt::Both,
-                    OptionAsAlt::Both => OptionAsAlt::None,
-                };
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
 
-                println!("Received Mouse click, toggling option_as_alt to: {option_as_alt:?}");
-                window.set_option_as_alt(option_as_alt);
+        match event {
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                window_id,
+            } if window_id == window.id() => control_flow.set_exit(),
+            Event::WindowEvent { event, .. } => match event {
+                WindowEvent::MouseInput {
+                    state: ElementState::Pressed,
+                    button: MouseButton::Left,
+                    ..
+                } => {
+                    option_as_alt = match option_as_alt {
+                        OptionAsAlt::None => OptionAsAlt::OnlyLeft,
+                        OptionAsAlt::OnlyLeft => OptionAsAlt::OnlyRight,
+                        OptionAsAlt::OnlyRight => OptionAsAlt::Both,
+                        OptionAsAlt::Both => OptionAsAlt::None,
+                    };
+
+                    println!("Received Mouse click, toggling option_as_alt to: {option_as_alt:?}");
+                    window.set_option_as_alt(option_as_alt);
+                }
+                WindowEvent::KeyboardInput { .. } => println!("KeyboardInput: {event:?}"),
+                _ => (),
+            },
+            Event::MainEventsCleared => {
+                window.request_redraw();
             }
-            WindowEvent::KeyboardInput { .. } => println!("KeyboardInput: {event:?}"),
-            WindowEvent::RedrawRequested => {
+            Event::RedrawRequested(_) => {
                 fill::fill_window(&window);
             }
             _ => (),
-        },
-        Event::AboutToWait => {
-            window.request_redraw();
         }
-
-        _ => (),
-    })
+    });
 }
 
 #[cfg(not(target_os = "macos"))]

examples/window_resize_increments.rs

@@ -11,9 +11,9 @@ use winit::{
 #[path = "util/fill.rs"]
 mod fill;
 
-fn main() -> Result<(), impl std::error::Error> {
+fn main() {
     SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
+    let event_loop = EventLoop::new();
 
     let window = WindowBuilder::new()
         .with_title("A fantastic window!")
@@ -24,18 +24,27 @@ fn main() -> Result<(), impl std::error::Error> {
 
     let mut has_increments = true;
 
-    event_loop.run(move |event, elwt| match event {
-        Event::WindowEvent { event, window_id } if window_id == window.id() => match event {
-            WindowEvent::CloseRequested => elwt.exit(),
-            WindowEvent::KeyboardInput {
+    event_loop.run(move |event, _, control_flow| {
+        control_flow.set_wait();
+
+        match event {
+            Event::WindowEvent {
+                event: WindowEvent::CloseRequested,
+                window_id,
+            } if window_id == window.id() => control_flow.set_exit(),
+            Event::WindowEvent {
                 event:
-                    KeyEvent {
-                        logical_key: Key::Space,
-                        state: ElementState::Released,
+                    WindowEvent::KeyboardInput {
+                        event:
+                            KeyEvent {
+                                logical_key: Key::Space,
+                                state: ElementState::Released,
+                                ..
+                            },
                         ..
                     },
-                ..
-            } => {
+                window_id,
+            } if window_id == window.id() => {
                 has_increments = !has_increments;
 
                 let new_increments = match window.resize_increments() {
@@ -45,13 +54,11 @@ fn main() -> Result<(), impl std::error::Error> {
                 debug!("Had increments: {}", new_increments.is_none());
                 window.set_resize_increments(new_increments);
             }
-            WindowEvent::RedrawRequested => {
+            Event::MainEventsCleared => window.request_redraw(),
+            Event::RedrawRequested(_) => {
                 fill::fill_window(&window);
             }
             _ => (),
-        },
-        Event::AboutToWait => window.request_redraw(),
-
-        _ => (),
-    })
+        }
+    });
 }

examples/window_run_return.rs

@@ -7,22 +7,23 @@
     x11_platform,
     wayland_platform,
     android_platform,
+    orbital_platform,
 ))]
-fn main() -> std::process::ExitCode {
-    use std::{process::ExitCode, thread::sleep, time::Duration};
+fn main() {
+    use std::{thread::sleep, time::Duration};
 
     use simple_logger::SimpleLogger;
     use winit::{
         event::{Event, WindowEvent},
         event_loop::EventLoop,
-        platform::pump_events::{EventLoopExtPumpEvents, PumpStatus},
+        platform::run_return::EventLoopExtRunReturn,
         window::WindowBuilder,
     };
 
     #[path = "util/fill.rs"]
     mod fill;
 
-    let mut event_loop = EventLoop::new().unwrap();
+    let mut event_loop = EventLoop::new();
 
     SimpleLogger::new().init().unwrap();
     let window = WindowBuilder::new()
@@ -30,9 +31,12 @@ fn main() -> std::process::ExitCode {
         .build(&event_loop)
         .unwrap();
 
-    'main: loop {
-        let timeout = Some(Duration::ZERO);
-        let status = event_loop.pump_events(timeout, |event, elwt| {
+    let mut quit = false;
+
+    while !quit {
+        event_loop.run_return(|event, _, control_flow| {
+            control_flow.set_wait();
+
             if let Event::WindowEvent { event, .. } = &event {
                 // Print only Window events to reduce noise
                 println!("{event:?}");
@@ -41,34 +45,27 @@ fn main() -> std::process::ExitCode {
             match event {
                 Event::WindowEvent {
                     event: WindowEvent::CloseRequested,
-                    window_id,
-                } if window_id == window.id() => elwt.exit(),
-                Event::AboutToWait => {
-                    window.request_redraw();
-                }
-                Event::WindowEvent {
-                    event: WindowEvent::RedrawRequested,
                     ..
                 } => {
+                    quit = true;
+                }
+                Event::MainEventsCleared => {
+                    control_flow.set_exit();
+                }
+                Event::RedrawRequested(_) => {
                     fill::fill_window(&window);
                 }
                 _ => (),
             }
         });
-        if let PumpStatus::Exit(exit_code) = status {
-            break 'main ExitCode::from(exit_code as u8);
-        }
 
-        // Sleep for 1/60 second to simulate application work
-        //
-        // Since `pump_events` doesn't block it will be important to
-        // throttle the loop in the app somehow.
-        println!("Update()");
+        // Sleep for 1/60 second to simulate rendering
+        println!("rendering");
         sleep(Duration::from_millis(16));
     }
 }
 
-#[cfg(any(ios_platform, wasm_platform, orbital_platform))]
+#[cfg(any(ios_platform, wasm_platform))]
 fn main() {
-    println!("This platform doesn't support pump_events.");
+    println!("This platform doesn't support run_return.");
 }

examples/window_tabbing.rs

@@ -1,107 +0,0 @@
-#![allow(clippy::single_match)]
-
-#[cfg(target_os = "macos")]
-use std::{collections::HashMap, num::NonZeroUsize};
-
-#[cfg(target_os = "macos")]
-use simple_logger::SimpleLogger;
-#[cfg(target_os = "macos")]
-use winit::{
-    event::{ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::Key,
-    platform::macos::{WindowBuilderExtMacOS, WindowExtMacOS},
-    window::{Window, WindowBuilder},
-};
-
-#[cfg(target_os = "macos")]
-#[path = "util/fill.rs"]
-mod fill;
-
-#[cfg(target_os = "macos")]
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let mut windows = HashMap::new();
-    let window = Window::new(&event_loop).unwrap();
-    println!("Opened a new window: {:?}", window.id());
-    windows.insert(window.id(), window);
-
-    println!("Press N to open a new window.");
-
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, window_id } = event {
-            match event {
-                WindowEvent::CloseRequested => {
-                    println!("Window {window_id:?} has received the signal to close");
-
-                    // This drops the window, causing it to close.
-                    windows.remove(&window_id);
-
-                    if windows.is_empty() {
-                        elwt.exit();
-                    }
-                }
-                WindowEvent::Resized(_) => {
-                    if let Some(window) = windows.get(&window_id) {
-                        window.request_redraw();
-                    }
-                }
-                WindowEvent::KeyboardInput {
-                    event:
-                        KeyEvent {
-                            state: ElementState::Pressed,
-                            logical_key,
-                            ..
-                        },
-                    is_synthetic: false,
-                    ..
-                } => match logical_key.as_ref() {
-                    Key::Character("t") => {
-                        let tabbing_id = windows.get(&window_id).unwrap().tabbing_identifier();
-                        let window = WindowBuilder::new()
-                            .with_tabbing_identifier(&tabbing_id)
-                            .build(elwt)
-                            .unwrap();
-                        println!("Added a new tab: {:?}", window.id());
-                        windows.insert(window.id(), window);
-                    }
-                    Key::Character("w") => {
-                        let _ = windows.remove(&window_id);
-                    }
-                    Key::ArrowRight => {
-                        windows.get(&window_id).unwrap().select_next_tab();
-                    }
-                    Key::ArrowLeft => {
-                        windows.get(&window_id).unwrap().select_previous_tab();
-                    }
-                    Key::Character(ch) => {
-                        if let Ok(index) = ch.parse::<NonZeroUsize>() {
-                            let index = index.get();
-                            // Select the last tab when pressing `9`.
-                            let window = windows.get(&window_id).unwrap();
-                            if index == 9 {
-                                window.select_tab_at_index(window.num_tabs() - 1)
-                            } else {
-                                window.select_tab_at_index(index - 1);
-                            }
-                        }
-                    }
-                    _ => (),
-                },
-                WindowEvent::RedrawRequested => {
-                    if let Some(window) = windows.get(&window_id) {
-                        fill::fill_window(window);
-                    }
-                }
-                _ => (),
-            }
-        }
-    })
-}
-
-#[cfg(not(target_os = "macos"))]
-fn main() {
-    println!("This example is only supported on MacOS");
-}

examples/x11_embed.rs

@@ -1,70 +0,0 @@
-//! A demonstration of embedding a winit window in an existing X11 application.
-
-#[cfg(x11_platform)]
-#[path = "util/fill.rs"]
-mod fill;
-
-#[cfg(x11_platform)]
-mod imple {
-    use super::fill;
-    use simple_logger::SimpleLogger;
-    use winit::{
-        event::{Event, WindowEvent},
-        event_loop::EventLoop,
-        platform::x11::WindowBuilderExtX11,
-        window::WindowBuilder,
-    };
-
-    pub(super) fn entry() -> Result<(), Box<dyn std::error::Error>> {
-        // First argument should be a 32-bit X11 window ID.
-        let parent_window_id = std::env::args()
-            .nth(1)
-            .ok_or("Expected a 32-bit X11 window ID as the first argument.")?
-            .parse::<u32>()?;
-
-        SimpleLogger::new().init().unwrap();
-        let event_loop = EventLoop::new()?;
-
-        let window = WindowBuilder::new()
-            .with_title("An embedded window!")
-            .with_inner_size(winit::dpi::LogicalSize::new(128.0, 128.0))
-            .with_embed_parent_window(parent_window_id)
-            .build(&event_loop)
-            .unwrap();
-
-        event_loop.run(move |event, elwt| {
-            match event {
-                Event::WindowEvent {
-                    event: WindowEvent::CloseRequested,
-                    window_id,
-                } if window_id == window.id() => elwt.exit(),
-                Event::AboutToWait => {
-                    window.request_redraw();
-                }
-                Event::WindowEvent {
-                    event: WindowEvent::RedrawRequested,
-                    ..
-                } => {
-                    // Notify the windowing system that we'll be presenting to the window.
-                    window.pre_present_notify();
-                    fill::fill_window(&window);
-                }
-                _ => (),
-            }
-        })?;
-
-        Ok(())
-    }
-}
-
-#[cfg(not(x11_platform))]
-mod imple {
-    pub(super) fn entry() -> Result<(), Box<dyn std::error::Error>> {
-        println!("This example is only supported on X11 platforms.");
-        Ok(())
-    }
-}
-
-fn main() -> Result<(), Box<dyn std::error::Error>> {
-    imple::entry()
-}

src/dpi.rs

@@ -82,7 +82,8 @@
 //!   If `WINIT_X11_SCALE_FACTOR` is set to `randr`, it'll ignore the `Xft.dpi` field and use the
 //!   XRandR scaling method. Generally speaking, you should try to configure the standard system
 //!   variables to do what you want before resorting to `WINIT_X11_SCALE_FACTOR`.
-//! - **Wayland:** Scale factor is suggested by the the compositor.
+//! - **Wayland:** On Wayland, scale factors are set per-screen by the server, and are always
+//!   integers (most often 1 or 2).
 //! - **iOS:** Scale factors are set by Apple to the value that best suits the device, and range
 //!   from `1.0` to `3.0`. See [this article][apple_1] and [this article][apple_2] for more
 //!   information.
@@ -580,421 +581,3 @@ impl<P: Pixel> From<LogicalPosition<P>> for Position {
         Position::Logical(position.cast())
     }
 }
-
-#[cfg(test)]
-mod tests {
-    use crate::dpi;
-    use std::collections::HashSet;
-
-    macro_rules! test_pixel_int_impl {
-        ($($name:ident => $ty:ty),*) => {$(
-            #[test]
-            fn $name() {
-                use dpi::Pixel;
-
-                assert_eq!(
-                    <$ty as Pixel>::from_f64(37.0),
-                    37,
-                );
-                assert_eq!(
-                    <$ty as Pixel>::from_f64(37.4),
-                    37,
-                );
-                assert_eq!(
-                    <$ty as Pixel>::from_f64(37.5),
-                    38,
-                );
-                assert_eq!(
-                    <$ty as Pixel>::from_f64(37.9),
-                    38,
-                );
-
-                assert_eq!(
-                    <$ty as Pixel>::cast::<u8>(37),
-                    37,
-                );
-                assert_eq!(
-                    <$ty as Pixel>::cast::<u16>(37),
-                    37,
-                );
-                assert_eq!(
-                    <$ty as Pixel>::cast::<u32>(37),
-                    37,
-                );
-                assert_eq!(
-                    <$ty as Pixel>::cast::<i8>(37),
-                    37,
-                );
-                assert_eq!(
-                    <$ty as Pixel>::cast::<i16>(37),
-                    37,
-                );
-                assert_eq!(
-                    <$ty as Pixel>::cast::<i32>(37),
-                    37,
-                );
-            }
-        )*};
-    }
-
-    test_pixel_int_impl! {
-        test_pixel_int_u8 => u8,
-        test_pixel_int_u16 => u16,
-        test_pixel_int_u32 => u32,
-        test_pixel_int_i8 => i8,
-        test_pixel_int_i16 => i16
-    }
-
-    macro_rules! assert_approx_eq {
-        ($a:expr, $b:expr $(,)?) => {
-            assert!(
-                ($a - $b).abs() < 0.001,
-                "{} is not approximately equal to {}",
-                $a,
-                $b
-            );
-        };
-    }
-
-    macro_rules! test_pixel_float_impl {
-    ($($name:ident => $ty:ty),*) => {$(
-        #[test]
-        fn $name() {
-            use dpi::Pixel;
-
-            assert_approx_eq!(
-                <$ty as Pixel>::from_f64(37.0),
-                37.0,
-            );
-            assert_approx_eq!(
-                <$ty as Pixel>::from_f64(37.4),
-                37.4,
-            );
-            assert_approx_eq!(
-                <$ty as Pixel>::from_f64(37.5),
-                37.5,
-            );
-            assert_approx_eq!(
-                <$ty as Pixel>::from_f64(37.9),
-                37.9,
-            );
-
-            assert_eq!(
-                <$ty as Pixel>::cast::<u8>(37.0),
-                37,
-            );
-            assert_eq!(
-                <$ty as Pixel>::cast::<u8>(37.4),
-                37,
-            );
-            assert_eq!(
-                <$ty as Pixel>::cast::<u8>(37.5),
-                38,
-            );
-
-            assert_eq!(
-                <$ty as Pixel>::cast::<u16>(37.0),
-                37,
-            );
-            assert_eq!(
-                <$ty as Pixel>::cast::<u16>(37.4),
-                37,
-            );
-            assert_eq!(
-                <$ty as Pixel>::cast::<u16>(37.5),
-                38,
-            );
-
-            assert_eq!(
-                <$ty as Pixel>::cast::<u32>(37.0),
-                37,
-            );
-            assert_eq!(
-                <$ty as Pixel>::cast::<u32>(37.4),
-                37,
-            );
-            assert_eq!(
-                <$ty as Pixel>::cast::<u32>(37.5),
-                38,
-            );
-
-            assert_eq!(
-                <$ty as Pixel>::cast::<i8>(37.0),
-                37,
-            );
-            assert_eq!(
-                <$ty as Pixel>::cast::<i8>(37.4),
-                37,
-            );
-            assert_eq!(
-                <$ty as Pixel>::cast::<i8>(37.5),
-                38,
-            );
-
-            assert_eq!(
-                <$ty as Pixel>::cast::<i16>(37.0),
-                37,
-            );
-            assert_eq!(
-                <$ty as Pixel>::cast::<i16>(37.4),
-                37,
-            );
-            assert_eq!(
-                <$ty as Pixel>::cast::<i16>(37.5),
-                38,
-            );
-        }
-    )*};
-}
-
-    test_pixel_float_impl! {
-        test_pixel_float_f32 => f32,
-        test_pixel_float_f64 => f64
-    }
-
-    #[test]
-    fn test_validate_scale_factor() {
-        assert!(dpi::validate_scale_factor(1.0));
-        assert!(dpi::validate_scale_factor(2.0));
-        assert!(dpi::validate_scale_factor(3.0));
-        assert!(dpi::validate_scale_factor(1.5));
-        assert!(dpi::validate_scale_factor(0.5));
-
-        assert!(!dpi::validate_scale_factor(0.0));
-        assert!(!dpi::validate_scale_factor(-1.0));
-        assert!(!dpi::validate_scale_factor(f64::INFINITY));
-        assert!(!dpi::validate_scale_factor(f64::NAN));
-        assert!(!dpi::validate_scale_factor(f64::NEG_INFINITY));
-    }
-
-    #[test]
-    fn test_logical_position() {
-        let log_pos = dpi::LogicalPosition::new(1.0, 2.0);
-        assert_eq!(
-            log_pos.to_physical::<u32>(1.0),
-            dpi::PhysicalPosition::new(1, 2)
-        );
-        assert_eq!(
-            log_pos.to_physical::<u32>(2.0),
-            dpi::PhysicalPosition::new(2, 4)
-        );
-        assert_eq!(log_pos.cast::<u32>(), dpi::LogicalPosition::new(1, 2));
-        assert_eq!(
-            log_pos,
-            dpi::LogicalPosition::from_physical(dpi::PhysicalPosition::new(1.0, 2.0), 1.0)
-        );
-        assert_eq!(
-            log_pos,
-            dpi::LogicalPosition::from_physical(dpi::PhysicalPosition::new(2.0, 4.0), 2.0)
-        );
-        assert_eq!(
-            dpi::LogicalPosition::from((2.0, 2.0)),
-            dpi::LogicalPosition::new(2.0, 2.0)
-        );
-        assert_eq!(
-            dpi::LogicalPosition::from([2.0, 3.0]),
-            dpi::LogicalPosition::new(2.0, 3.0)
-        );
-
-        let x: (f64, f64) = log_pos.into();
-        assert_eq!(x, (1.0, 2.0));
-        let x: [f64; 2] = log_pos.into();
-        assert_eq!(x, [1.0, 2.0]);
-    }
-
-    #[test]
-    fn test_physical_position() {
-        assert_eq!(
-            dpi::PhysicalPosition::from_logical(dpi::LogicalPosition::new(1.0, 2.0), 1.0),
-            dpi::PhysicalPosition::new(1, 2)
-        );
-        assert_eq!(
-            dpi::PhysicalPosition::from_logical(dpi::LogicalPosition::new(2.0, 4.0), 0.5),
-            dpi::PhysicalPosition::new(1, 2)
-        );
-        assert_eq!(
-            dpi::PhysicalPosition::from((2.0, 2.0)),
-            dpi::PhysicalPosition::new(2.0, 2.0)
-        );
-        assert_eq!(
-            dpi::PhysicalPosition::from([2.0, 3.0]),
-            dpi::PhysicalPosition::new(2.0, 3.0)
-        );
-
-        let x: (f64, f64) = dpi::PhysicalPosition::new(1, 2).into();
-        assert_eq!(x, (1.0, 2.0));
-        let x: [f64; 2] = dpi::PhysicalPosition::new(1, 2).into();
-        assert_eq!(x, [1.0, 2.0]);
-    }
-
-    #[test]
-    fn test_logical_size() {
-        let log_size = dpi::LogicalSize::new(1.0, 2.0);
-        assert_eq!(
-            log_size.to_physical::<u32>(1.0),
-            dpi::PhysicalSize::new(1, 2)
-        );
-        assert_eq!(
-            log_size.to_physical::<u32>(2.0),
-            dpi::PhysicalSize::new(2, 4)
-        );
-        assert_eq!(log_size.cast::<u32>(), dpi::LogicalSize::new(1, 2));
-        assert_eq!(
-            log_size,
-            dpi::LogicalSize::from_physical(dpi::PhysicalSize::new(1.0, 2.0), 1.0)
-        );
-        assert_eq!(
-            log_size,
-            dpi::LogicalSize::from_physical(dpi::PhysicalSize::new(2.0, 4.0), 2.0)
-        );
-        assert_eq!(
-            dpi::LogicalSize::from((2.0, 2.0)),
-            dpi::LogicalSize::new(2.0, 2.0)
-        );
-        assert_eq!(
-            dpi::LogicalSize::from([2.0, 3.0]),
-            dpi::LogicalSize::new(2.0, 3.0)
-        );
-
-        let x: (f64, f64) = log_size.into();
-        assert_eq!(x, (1.0, 2.0));
-        let x: [f64; 2] = log_size.into();
-        assert_eq!(x, [1.0, 2.0]);
-    }
-
-    #[test]
-    fn test_physical_size() {
-        assert_eq!(
-            dpi::PhysicalSize::from_logical(dpi::LogicalSize::new(1.0, 2.0), 1.0),
-            dpi::PhysicalSize::new(1, 2)
-        );
-        assert_eq!(
-            dpi::PhysicalSize::from_logical(dpi::LogicalSize::new(2.0, 4.0), 0.5),
-            dpi::PhysicalSize::new(1, 2)
-        );
-        assert_eq!(
-            dpi::PhysicalSize::from((2.0, 2.0)),
-            dpi::PhysicalSize::new(2.0, 2.0)
-        );
-        assert_eq!(
-            dpi::PhysicalSize::from([2.0, 3.0]),
-            dpi::PhysicalSize::new(2.0, 3.0)
-        );
-
-        let x: (f64, f64) = dpi::PhysicalSize::new(1, 2).into();
-        assert_eq!(x, (1.0, 2.0));
-        let x: [f64; 2] = dpi::PhysicalSize::new(1, 2).into();
-        assert_eq!(x, [1.0, 2.0]);
-    }
-
-    #[test]
-    fn test_size() {
-        assert_eq!(
-            dpi::Size::new(dpi::PhysicalSize::new(1, 2)),
-            dpi::Size::Physical(dpi::PhysicalSize::new(1, 2))
-        );
-        assert_eq!(
-            dpi::Size::new(dpi::LogicalSize::new(1.0, 2.0)),
-            dpi::Size::Logical(dpi::LogicalSize::new(1.0, 2.0))
-        );
-
-        assert_eq!(
-            dpi::Size::new(dpi::PhysicalSize::new(1, 2)).to_logical::<f64>(1.0),
-            dpi::LogicalSize::new(1.0, 2.0)
-        );
-        assert_eq!(
-            dpi::Size::new(dpi::PhysicalSize::new(1, 2)).to_logical::<f64>(2.0),
-            dpi::LogicalSize::new(0.5, 1.0)
-        );
-        assert_eq!(
-            dpi::Size::new(dpi::LogicalSize::new(1.0, 2.0)).to_logical::<f64>(1.0),
-            dpi::LogicalSize::new(1.0, 2.0)
-        );
-
-        assert_eq!(
-            dpi::Size::new(dpi::PhysicalSize::new(1, 2)).to_physical::<u32>(1.0),
-            dpi::PhysicalSize::new(1, 2)
-        );
-        assert_eq!(
-            dpi::Size::new(dpi::PhysicalSize::new(1, 2)).to_physical::<u32>(2.0),
-            dpi::PhysicalSize::new(1, 2)
-        );
-        assert_eq!(
-            dpi::Size::new(dpi::LogicalSize::new(1.0, 2.0)).to_physical::<u32>(1.0),
-            dpi::PhysicalSize::new(1, 2)
-        );
-        assert_eq!(
-            dpi::Size::new(dpi::LogicalSize::new(1.0, 2.0)).to_physical::<u32>(2.0),
-            dpi::PhysicalSize::new(2, 4)
-        );
-
-        let small = dpi::Size::Physical((1, 2).into());
-        let medium = dpi::Size::Logical((3, 4).into());
-        let medium_physical = dpi::Size::new(medium.to_physical::<u32>(1.0));
-        let large = dpi::Size::Physical((5, 6).into());
-        assert_eq!(dpi::Size::clamp(medium, small, large, 1.0), medium_physical);
-        assert_eq!(dpi::Size::clamp(small, medium, large, 1.0), medium_physical);
-        assert_eq!(dpi::Size::clamp(large, small, medium, 1.0), medium_physical);
-    }
-
-    #[test]
-    fn test_position() {
-        assert_eq!(
-            dpi::Position::new(dpi::PhysicalPosition::new(1, 2)),
-            dpi::Position::Physical(dpi::PhysicalPosition::new(1, 2))
-        );
-        assert_eq!(
-            dpi::Position::new(dpi::LogicalPosition::new(1.0, 2.0)),
-            dpi::Position::Logical(dpi::LogicalPosition::new(1.0, 2.0))
-        );
-
-        assert_eq!(
-            dpi::Position::new(dpi::PhysicalPosition::new(1, 2)).to_logical::<f64>(1.0),
-            dpi::LogicalPosition::new(1.0, 2.0)
-        );
-        assert_eq!(
-            dpi::Position::new(dpi::PhysicalPosition::new(1, 2)).to_logical::<f64>(2.0),
-            dpi::LogicalPosition::new(0.5, 1.0)
-        );
-        assert_eq!(
-            dpi::Position::new(dpi::LogicalPosition::new(1.0, 2.0)).to_logical::<f64>(1.0),
-            dpi::LogicalPosition::new(1.0, 2.0)
-        );
-
-        assert_eq!(
-            dpi::Position::new(dpi::PhysicalPosition::new(1, 2)).to_physical::<u32>(1.0),
-            dpi::PhysicalPosition::new(1, 2)
-        );
-        assert_eq!(
-            dpi::Position::new(dpi::PhysicalPosition::new(1, 2)).to_physical::<u32>(2.0),
-            dpi::PhysicalPosition::new(1, 2)
-        );
-        assert_eq!(
-            dpi::Position::new(dpi::LogicalPosition::new(1.0, 2.0)).to_physical::<u32>(1.0),
-            dpi::PhysicalPosition::new(1, 2)
-        );
-        assert_eq!(
-            dpi::Position::new(dpi::LogicalPosition::new(1.0, 2.0)).to_physical::<u32>(2.0),
-            dpi::PhysicalPosition::new(2, 4)
-        );
-    }
-
-    // Eat coverage for the Debug impls et al
-    #[test]
-    fn ensure_attrs_do_not_panic() {
-        let _ = format!("{:?}", dpi::LogicalPosition::<u32>::default().clone());
-        HashSet::new().insert(dpi::LogicalPosition::<u32>::default());
-
-        let _ = format!("{:?}", dpi::PhysicalPosition::<u32>::default().clone());
-        HashSet::new().insert(dpi::PhysicalPosition::<u32>::default());
-
-        let _ = format!("{:?}", dpi::LogicalSize::<u32>::default().clone());
-        HashSet::new().insert(dpi::LogicalSize::<u32>::default());
-
-        let _ = format!("{:?}", dpi::PhysicalSize::<u32>::default().clone());
-        HashSet::new().insert(dpi::PhysicalSize::<u32>::default());
-
-        let _ = format!("{:?}", dpi::Size::Physical((1, 2).into()).clone());
-        let _ = format!("{:?}", dpi::Position::Physical((1, 2).into()).clone());
-    }
-}

src/error.rs

@@ -2,14 +2,11 @@ use std::{error, fmt};
 
 use crate::platform_impl;
 
-// TODO: Rename
-/// An error that may be generated when requesting Winit state
+/// An error whose cause it outside Winit's control.
 #[derive(Debug)]
 pub enum ExternalError {
     /// The operation is not supported by the backend.
     NotSupported(NotSupportedError),
-    /// The operation was ignored.
-    Ignored,
     /// The OS cannot perform the operation.
     Os(OsError),
 }
@@ -28,27 +25,6 @@ pub struct OsError {
     error: platform_impl::OsError,
 }
 
-/// A general error that may occur while running the Winit event loop
-#[derive(Debug)]
-pub enum EventLoopError {
-    /// The operation is not supported by the backend.
-    NotSupported(NotSupportedError),
-    /// The OS cannot perform the operation.
-    Os(OsError),
-    /// The event loop can't be re-run while it's already running
-    AlreadyRunning,
-    /// The event loop can't be re-created.
-    RecreationAttempt,
-    /// Application has exit with an error status.
-    ExitFailure(i32),
-}
-
-impl From<OsError> for EventLoopError {
-    fn from(value: OsError) -> Self {
-        Self::Os(value)
-    }
-}
-
 impl NotSupportedError {
     #[inline]
     #[allow(dead_code)]
@@ -84,7 +60,6 @@ impl fmt::Display for ExternalError {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
         match self {
             ExternalError::NotSupported(e) => e.fmt(f),
-            ExternalError::Ignored => write!(f, "Operation was ignored"),
             ExternalError::Os(e) => e.fmt(f),
         }
     }
@@ -102,41 +77,6 @@ impl fmt::Display for NotSupportedError {
     }
 }
 
-impl fmt::Display for EventLoopError {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
-        match self {
-            EventLoopError::AlreadyRunning => write!(f, "EventLoop is already running"),
-            EventLoopError::RecreationAttempt => write!(f, "EventLoop can't be recreated"),
-            EventLoopError::NotSupported(e) => e.fmt(f),
-            EventLoopError::Os(e) => e.fmt(f),
-            EventLoopError::ExitFailure(status) => write!(f, "Exit Failure: {status}"),
-        }
-    }
-}
-
 impl error::Error for OsError {}
 impl error::Error for ExternalError {}
 impl error::Error for NotSupportedError {}
-impl error::Error for EventLoopError {}
-
-#[cfg(test)]
-mod tests {
-    #![allow(clippy::redundant_clone)]
-
-    use super::*;
-
-    // Eat attributes for testing
-    #[test]
-    fn ensure_fmt_does_not_panic() {
-        let _ = format!(
-            "{:?}, {}",
-            NotSupportedError::new(),
-            NotSupportedError::new().clone()
-        );
-        let _ = format!(
-            "{:?}, {}",
-            ExternalError::NotSupported(NotSupportedError::new()),
-            ExternalError::NotSupported(NotSupportedError::new())
-        );
-    }
-}

src/event.rs

@@ -7,24 +7,26 @@
 //! approximate the basic ordering loop of [`EventLoop::run(...)`] like this:
 //!
 //! ```rust,ignore
+//! let mut control_flow = ControlFlow::Poll;
 //! let mut start_cause = StartCause::Init;
 //!
-//! while !elwt.exiting() {
-//!     event_handler(NewEvents(start_cause), elwt);
+//! while control_flow != ControlFlow::Exit {
+//!     event_handler(NewEvents(start_cause), ..., &mut control_flow);
 //!
 //!     for e in (window events, user events, device events) {
-//!         event_handler(e, elwt);
+//!         event_handler(e, ..., &mut control_flow);
 //!     }
+//!     event_handler(MainEventsCleared, ..., &mut control_flow);
 //!
 //!     for w in (redraw windows) {
-//!         event_handler(RedrawRequested(w), elwt);
+//!         event_handler(RedrawRequested(w), ..., &mut control_flow);
 //!     }
+//!     event_handler(RedrawEventsCleared, ..., &mut control_flow);
 //!
-//!     event_handler(AboutToWait, elwt);
-//!     start_cause = wait_if_necessary();
+//!     start_cause = wait_if_necessary(control_flow);
 //! }
 //!
-//! event_handler(LoopExiting, elwt);
+//! event_handler(LoopDestroyed, ..., &mut control_flow);
 //! ```
 //!
 //! This leaves out timing details like [`ControlFlow::WaitUntil`] but hopefully
@@ -32,43 +34,39 @@
 //!
 //! [`EventLoop::run(...)`]: crate::event_loop::EventLoop::run
 //! [`ControlFlow::WaitUntil`]: crate::event_loop::ControlFlow::WaitUntil
+use smol_str::SmolStr;
 use std::path::PathBuf;
-use std::sync::{Mutex, Weak};
 #[cfg(not(wasm_platform))]
 use std::time::Instant;
-
-use smol_str::SmolStr;
 #[cfg(wasm_platform)]
 use web_time::Instant;
 
-use crate::error::ExternalError;
 #[cfg(doc)]
 use crate::window::Window;
 use crate::{
     dpi::{PhysicalPosition, PhysicalSize},
-    event_loop::AsyncRequestSerial,
     keyboard::{self, ModifiersKeyState, ModifiersKeys, ModifiersState},
     platform_impl,
-    window::{ActivationToken, Theme, WindowId},
+    window::{Theme, WindowId},
 };
 
 /// Describes a generic event.
 ///
 /// See the module-level docs for more information on the event loop manages each event.
-#[derive(Debug, Clone, PartialEq)]
-pub enum Event<T: 'static> {
+#[derive(Debug, PartialEq)]
+pub enum Event<'a, T: 'static> {
     /// Emitted when new events arrive from the OS to be processed.
     ///
     /// This event type is useful as a place to put code that should be done before you start
     /// processing events, such as updating frame timing information for benchmarking or checking
-    /// the [`StartCause`] to see if a timer set by
+    /// the [`StartCause`][crate::event::StartCause] to see if a timer set by
     /// [`ControlFlow::WaitUntil`](crate::event_loop::ControlFlow::WaitUntil) has elapsed.
     NewEvents(StartCause),
 
     /// Emitted when the OS sends an event to a winit window.
     WindowEvent {
         window_id: WindowId,
-        event: WindowEvent,
+        event: WindowEvent<'a>,
     },
 
     /// Emitted when the OS sends an event to a device.
@@ -86,7 +84,7 @@ pub enum Event<T: 'static> {
     ///
     /// Not all platforms support the notion of suspending applications, and there may be no
     /// technical way to guarantee being able to emit a `Suspended` event if the OS has
-    /// no formal application lifecycle (currently only Android, iOS, and Web do). For this reason,
+    /// no formal application lifecycle (currently only Android and iOS do). For this reason,
     /// Winit does not currently try to emit pseudo `Suspended` events before the application
     /// quits on platforms without an application lifecycle.
     ///
@@ -131,7 +129,7 @@ pub enum Event<T: 'static> {
     ///
     /// On Web, the `Suspended` event is emitted in response to a [`pagehide`] event
     /// with the property [`persisted`] being true, which means that the page is being
-    /// put in the [`bfcache`] (back/forward cache) - an in-memory cache that stores a
+    /// put in the [´bfcache`] (back/forward cache) - an in-memory cache that stores a
     /// complete snapshot of a page (including the JavaScript heap) as the user is
     /// navigating away.
     ///
@@ -197,7 +195,7 @@ pub enum Event<T: 'static> {
     ///
     /// On Web, the `Resumed` event is emitted in response to a [`pageshow`] event
     /// with the property [`persisted`] being true, which means that the page is being
-    /// restored from the [`bfcache`] (back/forward cache) - an in-memory cache that
+    /// restored from the [´bfcache`] (back/forward cache) - an in-memory cache that
     /// stores a complete snapshot of a page (including the JavaScript heap) as the
     /// user is navigating away.
     ///
@@ -208,65 +206,119 @@ pub enum Event<T: 'static> {
     /// [`Suspended`]: Self::Suspended
     Resumed,
 
-    /// Emitted when the event loop is about to block and wait for new events.
+    /// Emitted when all of the event loop's input events have been processed and redraw processing
+    /// is about to begin.
     ///
-    /// Most applications shouldn't need to hook into this event since there is no real relationship
-    /// between how often the event loop needs to wake up and the dispatching of any specific events.
+    /// This event is useful as a place to put your code that should be run after all
+    /// state-changing events have been handled and you want to do stuff (updating state, performing
+    /// calculations, etc) that happens as the "main body" of your event loop. If your program only draws
+    /// graphics when something changes, it's usually better to do it in response to
+    /// [`Event::RedrawRequested`](crate::event::Event::RedrawRequested), which gets emitted
+    /// immediately after this event. Programs that draw graphics continuously, like most games,
+    /// can render here unconditionally for simplicity.
+    MainEventsCleared,
+
+    /// Emitted after [`MainEventsCleared`] when a window should be redrawn.
     ///
-    /// High frequency event sources, such as input devices could potentially lead to lots of wake
-    /// ups and also lots of corresponding `AboutToWait` events.
+    /// This gets triggered in two scenarios:
+    /// - The OS has performed an operation that's invalidated the window's contents (such as
+    ///   resizing the window).
+    /// - The application has explicitly requested a redraw via [`Window::request_redraw`].
     ///
-    /// This is not an ideal event to drive application rendering from and instead applications
-    /// should render in response to [`WindowEvent::RedrawRequested`] events.
-    AboutToWait,
+    /// During each iteration of the event loop, Winit will aggregate duplicate redraw requests
+    /// into a single event, to help avoid duplicating rendering work.
+    ///
+    /// Mainly of interest to applications with mostly-static graphics that avoid redrawing unless
+    /// something changes, like most non-game GUIs.
+    ///
+    ///
+    /// ## Platform-specific
+    ///
+    /// - **macOS / iOS:** Due to implementation difficulties, this will often, but not always, be
+    ///   emitted directly inside `drawRect:`, with neither a preceding [`MainEventsCleared`] nor
+    ///   subsequent `RedrawEventsCleared`. See [#2640] for work on this.
+    ///
+    /// [`MainEventsCleared`]: Self::MainEventsCleared
+    /// [`RedrawEventsCleared`]: Self::RedrawEventsCleared
+    /// [#2640]: https://github.com/rust-windowing/winit/issues/2640
+    RedrawRequested(WindowId),
+
+    /// Emitted after all [`RedrawRequested`] events have been processed and control flow is about to
+    /// be taken away from the program. If there are no `RedrawRequested` events, it is emitted
+    /// immediately after `MainEventsCleared`.
+    ///
+    /// This event is useful for doing any cleanup or bookkeeping work after all the rendering
+    /// tasks have been completed.
+    ///
+    /// [`RedrawRequested`]: Self::RedrawRequested
+    RedrawEventsCleared,
 
     /// Emitted when the event loop is being shut down.
     ///
     /// This is irreversible - if this event is emitted, it is guaranteed to be the last event that
     /// gets emitted. You generally want to treat this as a "do on quit" event.
-    LoopExiting,
-
-    /// Emitted when the application has received a memory warning.
-    ///
-    /// ## Platform-specific
-    ///
-    /// ### Android
-    ///
-    /// On Android, the `MemoryWarning` event is sent when [`onLowMemory`] was called. The application
-    /// must [release memory] or risk being killed.
-    ///
-    /// [`onLowMemory`]: https://developer.android.com/reference/android/app/Application.html#onLowMemory()
-    /// [release memory]: https://developer.android.com/topic/performance/memory#release
-    ///
-    /// ### iOS
-    ///
-    /// On iOS, the `MemoryWarning` event is emitted in response to an [`applicationDidReceiveMemoryWarning`]
-    /// callback. The application must free as much memory as possible or risk being terminated, see
-    /// [how to respond to memory warnings].
-    ///
-    /// [`applicationDidReceiveMemoryWarning`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1623063-applicationdidreceivememorywarni
-    /// [how to respond to memory warnings]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle/responding_to_memory_warnings
-    ///
-    /// ### Others
-    ///
-    /// - **macOS / Wayland / Windows / Orbital:** Unsupported.
-    MemoryWarning,
+    LoopDestroyed,
 }
 
-impl<T> Event<T> {
+impl<T: Clone> Clone for Event<'static, T> {
+    fn clone(&self) -> Self {
+        use self::Event::*;
+        match self {
+            WindowEvent { window_id, event } => WindowEvent {
+                window_id: *window_id,
+                event: event.clone(),
+            },
+            UserEvent(event) => UserEvent(event.clone()),
+            DeviceEvent { device_id, event } => DeviceEvent {
+                device_id: *device_id,
+                event: event.clone(),
+            },
+            NewEvents(cause) => NewEvents(*cause),
+            MainEventsCleared => MainEventsCleared,
+            RedrawRequested(wid) => RedrawRequested(*wid),
+            RedrawEventsCleared => RedrawEventsCleared,
+            LoopDestroyed => LoopDestroyed,
+            Suspended => Suspended,
+            Resumed => Resumed,
+        }
+    }
+}
+
+impl<'a, T> Event<'a, T> {
     #[allow(clippy::result_large_err)]
-    pub fn map_nonuser_event<U>(self) -> Result<Event<U>, Event<T>> {
+    pub fn map_nonuser_event<U>(self) -> Result<Event<'a, U>, Event<'a, T>> {
         use self::Event::*;
         match self {
             UserEvent(_) => Err(self),
             WindowEvent { window_id, event } => Ok(WindowEvent { window_id, event }),
             DeviceEvent { device_id, event } => Ok(DeviceEvent { device_id, event }),
             NewEvents(cause) => Ok(NewEvents(cause)),
-            AboutToWait => Ok(AboutToWait),
-            LoopExiting => Ok(LoopExiting),
+            MainEventsCleared => Ok(MainEventsCleared),
+            RedrawRequested(wid) => Ok(RedrawRequested(wid)),
+            RedrawEventsCleared => Ok(RedrawEventsCleared),
+            LoopDestroyed => Ok(LoopDestroyed),
             Suspended => Ok(Suspended),
             Resumed => Ok(Resumed),
-            MemoryWarning => Ok(MemoryWarning),
+        }
+    }
+
+    /// If the event doesn't contain a reference, turn it into an event with a `'static` lifetime.
+    /// Otherwise, return `None`.
+    pub fn to_static(self) -> Option<Event<'static, T>> {
+        use self::Event::*;
+        match self {
+            WindowEvent { window_id, event } => event
+                .to_static()
+                .map(|event| WindowEvent { window_id, event }),
+            UserEvent(event) => Some(UserEvent(event)),
+            DeviceEvent { device_id, event } => Some(DeviceEvent { device_id, event }),
+            NewEvents(cause) => Some(NewEvents(cause)),
+            MainEventsCleared => Some(MainEventsCleared),
+            RedrawRequested(wid) => Some(RedrawRequested(wid)),
+            RedrawEventsCleared => Some(RedrawEventsCleared),
+            LoopDestroyed => Some(LoopDestroyed),
+            Suspended => Some(Suspended),
+            Resumed => Some(Resumed),
         }
     }
 }
@@ -302,22 +354,8 @@ pub enum StartCause {
 }
 
 /// Describes an event from a [`Window`].
-#[derive(Debug, Clone, PartialEq)]
-pub enum WindowEvent {
-    /// The activation token was delivered back and now could be used.
-    ///
-    #[cfg_attr(
-        not(any(x11_platform, wayland_platfrom)),
-        allow(rustdoc::broken_intra_doc_links)
-    )]
-    /// Delivered in response to [`request_activation_token`].
-    ///
-    /// [`request_activation_token`]: crate::platform::startup_notify::WindowExtStartupNotify::request_activation_token
-    ActivationTokenDone {
-        serial: AsyncRequestSerial,
-        token: ActivationToken,
-    },
-
+#[derive(Debug, PartialEq)]
+pub enum WindowEvent<'a> {
     /// The size of the window has changed. Contains the client area's new dimensions.
     Resized(PhysicalSize<u32>),
 
@@ -392,14 +430,6 @@ pub enum WindowEvent {
     Ime(Ime),
 
     /// The cursor has moved on the window.
-    ///
-    /// ## Platform-specific
-    ///
-    /// - **Web:** Doesn't take into account CSS [`border`], [`padding`], or [`transform`].
-    ///
-    /// [`border`]: https://developer.mozilla.org/en-US/docs/Web/CSS/border
-    /// [`padding`]: https://developer.mozilla.org/en-US/docs/Web/CSS/padding
-    /// [`transform`]: https://developer.mozilla.org/en-US/docs/Web/CSS/transform
     CursorMoved {
         device_id: DeviceId,
 
@@ -410,25 +440,9 @@ pub enum WindowEvent {
     },
 
     /// The cursor has entered the window.
-    ///
-    /// ## Platform-specific
-    ///
-    /// - **Web:** Doesn't take into account CSS [`border`], [`padding`], or [`transform`].
-    ///
-    /// [`border`]: https://developer.mozilla.org/en-US/docs/Web/CSS/border
-    /// [`padding`]: https://developer.mozilla.org/en-US/docs/Web/CSS/padding
-    /// [`transform`]: https://developer.mozilla.org/en-US/docs/Web/CSS/transform
     CursorEntered { device_id: DeviceId },
 
     /// The cursor has left the window.
-    ///
-    /// ## Platform-specific
-    ///
-    /// - **Web:** Doesn't take into account CSS [`border`], [`padding`], or [`transform`].
-    ///
-    /// [`border`]: https://developer.mozilla.org/en-US/docs/Web/CSS/border
-    /// [`padding`]: https://developer.mozilla.org/en-US/docs/Web/CSS/padding
-    /// [`transform`]: https://developer.mozilla.org/en-US/docs/Web/CSS/transform
     CursorLeft { device_id: DeviceId },
 
     /// A mouse wheel movement or touchpad scroll occurred.
@@ -514,12 +528,7 @@ pub enum WindowEvent {
     ///
     /// ## Platform-specific
     ///
-    /// - **Web:** Doesn't take into account CSS [`border`], [`padding`], or [`transform`].
     /// - **macOS:** Unsupported.
-    ///
-    /// [`border`]: https://developer.mozilla.org/en-US/docs/Web/CSS/border
-    /// [`padding`]: https://developer.mozilla.org/en-US/docs/Web/CSS/padding
-    /// [`transform`]: https://developer.mozilla.org/en-US/docs/Web/CSS/transform
     Touch(Touch),
 
     /// The window's scale factor has changed.
@@ -537,10 +546,7 @@ pub enum WindowEvent {
     /// For more information about DPI in general, see the [`dpi`](crate::dpi) module.
     ScaleFactorChanged {
         scale_factor: f64,
-        /// Handle to update inner size during scale changes.
-        ///
-        /// See [`InnerSizeWriter`] docs for more details.
-        inner_size_writer: InnerSizeWriter,
+        new_inner_size: &'a mut PhysicalSize<u32>,
     },
 
     /// The system window theme has changed.
@@ -558,39 +564,207 @@ pub enum WindowEvent {
     /// This is different to window visibility as it depends on whether the window is closed,
     /// minimised, set invisible, or fully occluded by another window.
     ///
-    /// ## Platform-specific
-    ///
-    /// ### iOS
-    ///
-    /// On iOS, the `Occluded(false)` event is emitted in response to an [`applicationWillEnterForeground`]
-    /// callback which means the application should start preparing its data. The `Occluded(true)` event is
-    /// emitted in response to an [`applicationDidEnterBackground`] callback which means the application
-    /// should free resources (according to the [iOS application lifecycle]).
-    ///
-    /// [`applicationWillEnterForeground`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1623076-applicationwillenterforeground
-    /// [`applicationDidEnterBackground`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1622997-applicationdidenterbackground
-    /// [iOS application lifecycle]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle
-    ///
-    /// ### Others
-    ///
-    /// - **Web:** Doesn't take into account CSS [`border`], [`padding`], or [`transform`].
-    /// - **Android / Windows / Orbital:** Unsupported.
-    ///
-    /// [`border`]: https://developer.mozilla.org/en-US/docs/Web/CSS/border
-    /// [`padding`]: https://developer.mozilla.org/en-US/docs/Web/CSS/padding
-    /// [`transform`]: https://developer.mozilla.org/en-US/docs/Web/CSS/transform
+    /// Platform-specific behavior:
+    /// - **iOS / Android / Web / Wayland / Windows / Orbital:** Unsupported.
     Occluded(bool),
+}
 
-    /// Emitted when a window should be redrawn.
-    ///
-    /// This gets triggered in two scenarios:
-    /// - The OS has performed an operation that's invalidated the window's contents (such as
-    ///   resizing the window).
-    /// - The application has explicitly requested a redraw via [`Window::request_redraw`].
-    ///
-    /// Winit will aggregate duplicate redraw requests into a single event, to
-    /// help avoid duplicating rendering work.
-    RedrawRequested,
+impl Clone for WindowEvent<'static> {
+    fn clone(&self) -> Self {
+        use self::WindowEvent::*;
+        return match self {
+            Resized(size) => Resized(*size),
+            Moved(pos) => Moved(*pos),
+            CloseRequested => CloseRequested,
+            Destroyed => Destroyed,
+            DroppedFile(file) => DroppedFile(file.clone()),
+            HoveredFile(file) => HoveredFile(file.clone()),
+            HoveredFileCancelled => HoveredFileCancelled,
+            Focused(f) => Focused(*f),
+            KeyboardInput {
+                device_id,
+                event,
+                is_synthetic,
+            } => KeyboardInput {
+                device_id: *device_id,
+                event: event.clone(),
+                is_synthetic: *is_synthetic,
+            },
+            Ime(preedit_state) => Ime(preedit_state.clone()),
+            ModifiersChanged(modifiers) => ModifiersChanged(*modifiers),
+            CursorMoved {
+                device_id,
+                position,
+            } => CursorMoved {
+                device_id: *device_id,
+                position: *position,
+            },
+            CursorEntered { device_id } => CursorEntered {
+                device_id: *device_id,
+            },
+            CursorLeft { device_id } => CursorLeft {
+                device_id: *device_id,
+            },
+            MouseWheel {
+                device_id,
+                delta,
+                phase,
+            } => MouseWheel {
+                device_id: *device_id,
+                delta: *delta,
+                phase: *phase,
+            },
+            MouseInput {
+                device_id,
+                state,
+                button,
+            } => MouseInput {
+                device_id: *device_id,
+                state: *state,
+                button: *button,
+            },
+            TouchpadMagnify {
+                device_id,
+                delta,
+                phase,
+            } => TouchpadMagnify {
+                device_id: *device_id,
+                delta: *delta,
+                phase: *phase,
+            },
+            SmartMagnify { device_id } => SmartMagnify {
+                device_id: *device_id,
+            },
+            TouchpadRotate {
+                device_id,
+                delta,
+                phase,
+            } => TouchpadRotate {
+                device_id: *device_id,
+                delta: *delta,
+                phase: *phase,
+            },
+            TouchpadPressure {
+                device_id,
+                pressure,
+                stage,
+            } => TouchpadPressure {
+                device_id: *device_id,
+                pressure: *pressure,
+                stage: *stage,
+            },
+            AxisMotion {
+                device_id,
+                axis,
+                value,
+            } => AxisMotion {
+                device_id: *device_id,
+                axis: *axis,
+                value: *value,
+            },
+            Touch(touch) => Touch(*touch),
+            ThemeChanged(theme) => ThemeChanged(*theme),
+            ScaleFactorChanged { .. } => {
+                unreachable!("Static event can't be about scale factor changing")
+            }
+            Occluded(occluded) => Occluded(*occluded),
+        };
+    }
+}
+
+impl<'a> WindowEvent<'a> {
+    pub fn to_static(self) -> Option<WindowEvent<'static>> {
+        use self::WindowEvent::*;
+        match self {
+            Resized(size) => Some(Resized(size)),
+            Moved(position) => Some(Moved(position)),
+            CloseRequested => Some(CloseRequested),
+            Destroyed => Some(Destroyed),
+            DroppedFile(file) => Some(DroppedFile(file)),
+            HoveredFile(file) => Some(HoveredFile(file)),
+            HoveredFileCancelled => Some(HoveredFileCancelled),
+            Focused(focused) => Some(Focused(focused)),
+            KeyboardInput {
+                device_id,
+                event,
+                is_synthetic,
+            } => Some(KeyboardInput {
+                device_id,
+                event,
+                is_synthetic,
+            }),
+            ModifiersChanged(modifers) => Some(ModifiersChanged(modifers)),
+            Ime(event) => Some(Ime(event)),
+            CursorMoved {
+                device_id,
+                position,
+            } => Some(CursorMoved {
+                device_id,
+                position,
+            }),
+            CursorEntered { device_id } => Some(CursorEntered { device_id }),
+            CursorLeft { device_id } => Some(CursorLeft { device_id }),
+            MouseWheel {
+                device_id,
+                delta,
+                phase,
+            } => Some(MouseWheel {
+                device_id,
+                delta,
+                phase,
+            }),
+            MouseInput {
+                device_id,
+                state,
+                button,
+            } => Some(MouseInput {
+                device_id,
+                state,
+                button,
+            }),
+            TouchpadMagnify {
+                device_id,
+                delta,
+                phase,
+            } => Some(TouchpadMagnify {
+                device_id,
+                delta,
+                phase,
+            }),
+            SmartMagnify { device_id } => Some(SmartMagnify { device_id }),
+            TouchpadRotate {
+                device_id,
+                delta,
+                phase,
+            } => Some(TouchpadRotate {
+                device_id,
+                delta,
+                phase,
+            }),
+            TouchpadPressure {
+                device_id,
+                pressure,
+                stage,
+            } => Some(TouchpadPressure {
+                device_id,
+                pressure,
+                stage,
+            }),
+            AxisMotion {
+                device_id,
+                axis,
+                value,
+            } => Some(AxisMotion {
+                device_id,
+                axis,
+                value,
+            }),
+            Touch(touch) => Some(Touch(touch)),
+            ThemeChanged(theme) => Some(ThemeChanged(theme)),
+            ScaleFactorChanged { .. } => None,
+            Occluded(occluded) => Some(Occluded(occluded)),
+        }
+    }
 }
 
 /// Identifier of an input device.
@@ -612,8 +786,7 @@ impl DeviceId {
     ///
     /// **Passing this into a winit function will result in undefined behavior.**
     pub const unsafe fn dummy() -> Self {
-        #[allow(unused_unsafe)]
-        DeviceId(unsafe { platform_impl::DeviceId::dummy() })
+        DeviceId(platform_impl::DeviceId::dummy())
     }
 }
 
@@ -659,6 +832,10 @@ pub enum DeviceEvent {
     },
 
     Key(RawKeyEvent),
+
+    Text {
+        codepoint: char,
+    },
 }
 
 /// Describes a keyboard input as a raw device event.
@@ -708,7 +885,7 @@ pub struct KeyEvent {
     // Allowing `broken_intra_doc_links` for `logical_key`, because
     // `key_without_modifiers` is not available on all platforms
     #[cfg_attr(
-        not(any(windows_platform, macos_platform, x11_platform, wayland_platform)),
+        not(any(target_os = "macos", target_os = "windows", target_os = "linux")),
         allow(rustdoc::broken_intra_doc_links)
     )]
     /// This value is affected by all modifiers except <kbd>Ctrl</kbd>.
@@ -960,12 +1137,7 @@ pub enum TouchPhase {
 ///
 /// ## Platform-specific
 ///
-/// - **Web:** Doesn't take into account CSS [`border`], [`padding`], or [`transform`].
 /// - **macOS:** Unsupported.
-///
-/// [`border`]: https://developer.mozilla.org/en-US/docs/Web/CSS/border
-/// [`padding`]: https://developer.mozilla.org/en-US/docs/Web/CSS/padding
-/// [`transform`]: https://developer.mozilla.org/en-US/docs/Web/CSS/transform
 #[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Touch {
     pub device_id: DeviceId,
@@ -976,10 +1148,7 @@ pub struct Touch {
     ///
     /// ## Platform-specific
     ///
-    /// - Only available on **iOS** 9.0+, **Windows** 8+, **Web**, and **Android**.
-    /// - **Android**: This will never be [None]. If the device doesn't support pressure
-    /// sensitivity, force will either be 0.0 or 1.0. Also see the
-    /// [android documentation](https://developer.android.com/reference/android/view/MotionEvent#AXIS_PRESSURE).
+    /// - Only available on **iOS** 9.0+ and **Windows** 8+.
     pub force: Option<Force>,
     /// Unique identifier of a finger.
     pub id: u64,
@@ -1056,20 +1225,13 @@ pub enum ElementState {
     Released,
 }
 
-impl ElementState {
-    /// True if `self == Pressed`.
-    pub fn is_pressed(self) -> bool {
-        self == ElementState::Pressed
-    }
-}
-
 /// Describes a button of a mouse controller.
 ///
 /// ## Platform-specific
 ///
 /// **macOS:** `Back` and `Forward` might not work with all hardware.
 /// **Orbital:** `Back` and `Forward` are unsupported due to orbital not supporting them.
-#[derive(Debug, Hash, PartialEq, Eq, PartialOrd, Ord, Clone, Copy)]
+#[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum MouseButton {
     Left,
@@ -1106,237 +1268,3 @@ pub enum MouseScrollDelta {
     /// and move the content right and down (to reveal more things left and up).
     PixelDelta(PhysicalPosition<f64>),
 }
-
-/// Handle to synchroniously change the size of the window from the
-/// [`WindowEvent`].
-#[derive(Debug, Clone)]
-pub struct InnerSizeWriter {
-    pub(crate) new_inner_size: Weak<Mutex<PhysicalSize<u32>>>,
-}
-
-impl InnerSizeWriter {
-    #[cfg(not(orbital_platform))]
-    pub(crate) fn new(new_inner_size: Weak<Mutex<PhysicalSize<u32>>>) -> Self {
-        Self { new_inner_size }
-    }
-
-    /// Try to request inner size which will be set synchroniously on the window.
-    pub fn request_inner_size(
-        &mut self,
-        new_inner_size: PhysicalSize<u32>,
-    ) -> Result<(), ExternalError> {
-        if let Some(inner) = self.new_inner_size.upgrade() {
-            *inner.lock().unwrap() = new_inner_size;
-            Ok(())
-        } else {
-            Err(ExternalError::Ignored)
-        }
-    }
-}
-
-impl PartialEq for InnerSizeWriter {
-    fn eq(&self, other: &Self) -> bool {
-        self.new_inner_size.as_ptr() == other.new_inner_size.as_ptr()
-    }
-}
-
-#[cfg(test)]
-mod tests {
-    use crate::event;
-    use std::collections::{BTreeSet, HashSet};
-
-    macro_rules! foreach_event {
-        ($closure:expr) => {{
-            #[allow(unused_mut)]
-            let mut x = $closure;
-            let did = unsafe { event::DeviceId::dummy() };
-
-            #[allow(deprecated)]
-            {
-                use crate::event::{Event::*, Ime::Enabled, WindowEvent::*};
-                use crate::window::WindowId;
-
-                // Mainline events.
-                let wid = unsafe { WindowId::dummy() };
-                x(UserEvent(()));
-                x(NewEvents(event::StartCause::Init));
-                x(AboutToWait);
-                x(LoopExiting);
-                x(Suspended);
-                x(Resumed);
-
-                // Window events.
-                let with_window_event = |wev| {
-                    x(WindowEvent {
-                        window_id: wid,
-                        event: wev,
-                    })
-                };
-
-                with_window_event(CloseRequested);
-                with_window_event(Destroyed);
-                with_window_event(Focused(true));
-                with_window_event(Moved((0, 0).into()));
-                with_window_event(Resized((0, 0).into()));
-                with_window_event(DroppedFile("x.txt".into()));
-                with_window_event(HoveredFile("x.txt".into()));
-                with_window_event(HoveredFileCancelled);
-                with_window_event(Ime(Enabled));
-                with_window_event(CursorMoved {
-                    device_id: did,
-                    position: (0, 0).into(),
-                });
-                with_window_event(ModifiersChanged(event::Modifiers::default()));
-                with_window_event(CursorEntered { device_id: did });
-                with_window_event(CursorLeft { device_id: did });
-                with_window_event(MouseWheel {
-                    device_id: did,
-                    delta: event::MouseScrollDelta::LineDelta(0.0, 0.0),
-                    phase: event::TouchPhase::Started,
-                });
-                with_window_event(MouseInput {
-                    device_id: did,
-                    state: event::ElementState::Pressed,
-                    button: event::MouseButton::Other(0),
-                });
-                with_window_event(TouchpadMagnify {
-                    device_id: did,
-                    delta: 0.0,
-                    phase: event::TouchPhase::Started,
-                });
-                with_window_event(SmartMagnify { device_id: did });
-                with_window_event(TouchpadRotate {
-                    device_id: did,
-                    delta: 0.0,
-                    phase: event::TouchPhase::Started,
-                });
-                with_window_event(TouchpadPressure {
-                    device_id: did,
-                    pressure: 0.0,
-                    stage: 0,
-                });
-                with_window_event(AxisMotion {
-                    device_id: did,
-                    axis: 0,
-                    value: 0.0,
-                });
-                with_window_event(Touch(event::Touch {
-                    device_id: did,
-                    phase: event::TouchPhase::Started,
-                    location: (0.0, 0.0).into(),
-                    id: 0,
-                    force: Some(event::Force::Normalized(0.0)),
-                }));
-                with_window_event(ThemeChanged(crate::window::Theme::Light));
-                with_window_event(Occluded(true));
-            }
-
-            #[allow(deprecated)]
-            {
-                use event::DeviceEvent::*;
-
-                let with_device_event = |dev_ev| {
-                    x(event::Event::DeviceEvent {
-                        device_id: did,
-                        event: dev_ev,
-                    })
-                };
-
-                with_device_event(Added);
-                with_device_event(Removed);
-                with_device_event(MouseMotion {
-                    delta: (0.0, 0.0).into(),
-                });
-                with_device_event(MouseWheel {
-                    delta: event::MouseScrollDelta::LineDelta(0.0, 0.0),
-                });
-                with_device_event(Motion {
-                    axis: 0,
-                    value: 0.0,
-                });
-                with_device_event(Button {
-                    button: 0,
-                    state: event::ElementState::Pressed,
-                });
-            }
-        }};
-    }
-
-    #[allow(clippy::redundant_clone)]
-    #[test]
-    fn test_event_clone() {
-        foreach_event!(|event: event::Event<()>| {
-            let event2 = event.clone();
-            assert_eq!(event, event2);
-        })
-    }
-
-    #[test]
-    fn test_map_nonuser_event() {
-        foreach_event!(|event: event::Event<()>| {
-            let is_user = matches!(event, event::Event::UserEvent(()));
-            let event2 = event.map_nonuser_event::<()>();
-            if is_user {
-                assert_eq!(event2, Err(event::Event::UserEvent(())));
-            } else {
-                assert!(event2.is_ok());
-            }
-        })
-    }
-
-    #[test]
-    fn test_force_normalize() {
-        let force = event::Force::Normalized(0.0);
-        assert_eq!(force.normalized(), 0.0);
-
-        let force2 = event::Force::Calibrated {
-            force: 5.0,
-            max_possible_force: 2.5,
-            altitude_angle: None,
-        };
-        assert_eq!(force2.normalized(), 2.0);
-
-        let force3 = event::Force::Calibrated {
-            force: 5.0,
-            max_possible_force: 2.5,
-            altitude_angle: Some(std::f64::consts::PI / 2.0),
-        };
-        assert_eq!(force3.normalized(), 2.0);
-    }
-
-    #[allow(clippy::clone_on_copy)]
-    #[test]
-    fn ensure_attrs_do_not_panic() {
-        foreach_event!(|event: event::Event<()>| {
-            let _ = format!("{:?}", event);
-        });
-        let _ = event::StartCause::Init.clone();
-
-        let did = unsafe { crate::event::DeviceId::dummy() }.clone();
-        HashSet::new().insert(did);
-        let mut set = [did, did, did];
-        set.sort_unstable();
-        let mut set2 = BTreeSet::new();
-        set2.insert(did);
-        set2.insert(did);
-
-        HashSet::new().insert(event::TouchPhase::Started.clone());
-        HashSet::new().insert(event::MouseButton::Left.clone());
-        HashSet::new().insert(event::Ime::Enabled);
-
-        let _ = event::Touch {
-            device_id: did,
-            phase: event::TouchPhase::Started,
-            location: (0.0, 0.0).into(),
-            id: 0,
-            force: Some(event::Force::Normalized(0.0)),
-        }
-        .clone();
-        let _ = event::Force::Calibrated {
-            force: 0.0,
-            max_possible_force: 0.0,
-            altitude_angle: None,
-        }
-        .clone();
-    }
-}

src/event_loop.rs

@@ -9,15 +9,15 @@
 //! handle events.
 use std::marker::PhantomData;
 use std::ops::Deref;
-use std::sync::atomic::{AtomicBool, AtomicU64, Ordering};
+use std::sync::atomic::{AtomicBool, Ordering};
 use std::{error, fmt};
 
+use raw_window_handle::{HasRawDisplayHandle, RawDisplayHandle};
 #[cfg(not(wasm_platform))]
 use std::time::{Duration, Instant};
 #[cfg(wasm_platform)]
 use web_time::{Duration, Instant};
 
-use crate::error::EventLoopError;
 use crate::{event::Event, monitor::MonitorHandle, platform_impl};
 
 /// Provides a way to retrieve events from the system and from the windows that were registered to
@@ -87,23 +87,23 @@ impl<T> EventLoopBuilder<T> {
     /// ***For cross-platform compatibility, the [`EventLoop`] must be created on the main thread,
     /// and only once per application.***
     ///
+    /// Attempting to create the event loop on a different thread, or multiple event loops in
+    /// the same application, will panic. This restriction isn't
+    /// strictly necessary on all platforms, but is imposed to eliminate any nasty surprises when
+    /// porting to platforms that require it. `EventLoopBuilderExt::any_thread` functions are exposed
+    /// in the relevant [`platform`] module if the target platform supports creating an event loop on
+    /// any thread.
+    ///
     /// Calling this function will result in display backend initialisation.
     ///
-    /// ## Panics
-    ///
-    /// Attempting to create the event loop off the main thread will panic. This
-    /// restriction isn't strictly necessary on all platforms, but is imposed to
-    /// eliminate any nasty surprises when porting to platforms that require it.
-    /// `EventLoopBuilderExt::any_thread` functions are exposed in the relevant
-    /// [`platform`] module if the target platform supports creating an event
-    /// loop on any thread.
-    ///
     /// ## Platform-specific
     ///
-    /// - **Wayland/X11:** to prevent running under `Wayland` or `X11` unset `WAYLAND_DISPLAY`
-    ///                    or `DISPLAY` respectively when building the event loop.
-    /// - **Android:** must be configured with an `AndroidApp` from `android_main()` by calling
-    ///     [`.with_android_app(app)`] before calling `.build()`, otherwise it'll panic.
+    /// - **Linux:** Backend type can be controlled using an environment variable
+    ///   `WINIT_UNIX_BACKEND`. Legal values are `x11` and `wayland`.
+    ///   If it is not set, winit will try to connect to a Wayland connection, and if that fails,
+    ///   will fall back on X11. If this variable is set with any other value, winit will panic.
+    /// - **Android:** Must be configured with an `AndroidApp` from `android_main()` by calling
+    ///     [`.with_android_app(app)`] before calling `.build()`.
     ///
     /// [`platform`]: crate::platform
     #[cfg_attr(
@@ -115,17 +115,17 @@ impl<T> EventLoopBuilder<T> {
         doc = "[`.with_android_app(app)`]: #only-available-on-android"
     )]
     #[inline]
-    pub fn build(&mut self) -> Result<EventLoop<T>, EventLoopError> {
+    pub fn build(&mut self) -> EventLoop<T> {
         if EVENT_LOOP_CREATED.swap(true, Ordering::Relaxed) {
-            return Err(EventLoopError::RecreationAttempt);
+            panic!("Creating EventLoop multiple times is not supported.");
         }
 
         // Certain platforms accept a mutable reference in their API.
         #[allow(clippy::unnecessary_mut_passed)]
-        Ok(EventLoop {
-            event_loop: platform_impl::EventLoop::new(&mut self.platform_specific)?,
+        EventLoop {
+            event_loop: platform_impl::EventLoop::new(&mut self.platform_specific),
             _marker: PhantomData,
-        })
+        }
     }
 
     #[cfg(wasm_platform)]
@@ -146,21 +146,28 @@ impl<T> fmt::Debug for EventLoopWindowTarget<T> {
     }
 }
 
-/// Set through [`EventLoopWindowTarget::set_control_flow()`].
+/// Set by the user callback given to the [`EventLoop::run`] method.
 ///
-/// Indicates the desired behavior of the event loop after [`Event::AboutToWait`] is emitted.
+/// Indicates the desired behavior of the event loop after [`Event::RedrawEventsCleared`] is emitted.
 ///
-/// Defaults to [`Wait`].
+/// Defaults to [`Poll`].
 ///
-/// [`Wait`]: Self::Wait
-#[derive(Copy, Clone, Debug, Default, PartialEq, Eq)]
+/// ## Persistency
+///
+/// Almost every change is persistent between multiple calls to the event loop closure within a
+/// given run loop. The only exception to this is [`ExitWithCode`] which, once set, cannot be unset.
+/// Changes are **not** persistent between multiple calls to `run_return` - issuing a new call will
+/// reset the control flow to [`Poll`].
+///
+/// [`ExitWithCode`]: Self::ExitWithCode
+/// [`Poll`]: Self::Poll
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
 pub enum ControlFlow {
     /// When the current loop iteration finishes, immediately begin a new iteration regardless of
     /// whether or not new events are available to process.
     Poll,
 
     /// When the current loop iteration finishes, suspend the thread until another event arrives.
-    #[default]
     Wait,
 
     /// When the current loop iteration finishes, suspend the thread until either another event
@@ -172,22 +179,88 @@ pub enum ControlFlow {
     ///
     /// [`Poll`]: Self::Poll
     WaitUntil(Instant),
+
+    /// Send a [`LoopDestroyed`] event and stop the event loop. This variant is *sticky* - once set,
+    /// `control_flow` cannot be changed from `ExitWithCode`, and any future attempts to do so will
+    /// result in the `control_flow` parameter being reset to `ExitWithCode`.
+    ///
+    /// The contained number will be used as exit code. The [`Exit`] constant is a shortcut for this
+    /// with exit code 0.
+    ///
+    /// ## Platform-specific
+    ///
+    /// - **Android / iOS / WASM:** The supplied exit code is unused.
+    /// - **Unix:** On most Unix-like platforms, only the 8 least significant bits will be used,
+    ///   which can cause surprises with negative exit values (`-42` would end up as `214`). See
+    ///   [`std::process::exit`].
+    ///
+    /// [`LoopDestroyed`]: Event::LoopDestroyed
+    /// [`Exit`]: ControlFlow::Exit
+    ExitWithCode(i32),
 }
 
 impl ControlFlow {
-    /// Creates a [`ControlFlow`] that waits until a timeout has expired.
+    /// Alias for [`ExitWithCode`]`(0)`.
+    ///
+    /// [`ExitWithCode`]: Self::ExitWithCode
+    #[allow(non_upper_case_globals)]
+    pub const Exit: Self = Self::ExitWithCode(0);
+
+    /// Sets this to [`Poll`].
+    ///
+    /// [`Poll`]: Self::Poll
+    pub fn set_poll(&mut self) {
+        *self = Self::Poll;
+    }
+
+    /// Sets this to [`Wait`].
+    ///
+    /// [`Wait`]: Self::Wait
+    pub fn set_wait(&mut self) {
+        *self = Self::Wait;
+    }
+
+    /// Sets this to [`WaitUntil`]`(instant)`.
+    ///
+    /// [`WaitUntil`]: Self::WaitUntil
+    pub fn set_wait_until(&mut self, instant: Instant) {
+        *self = Self::WaitUntil(instant);
+    }
+
+    /// Sets this to wait until a timeout has expired.
     ///
     /// In most cases, this is set to [`WaitUntil`]. However, if the timeout overflows, it is
     /// instead set to [`Wait`].
     ///
     /// [`WaitUntil`]: Self::WaitUntil
     /// [`Wait`]: Self::Wait
-    pub fn wait_duration(timeout: Duration) -> Self {
+    pub fn set_wait_timeout(&mut self, timeout: Duration) {
         match Instant::now().checked_add(timeout) {
-            Some(instant) => Self::WaitUntil(instant),
-            None => Self::Wait,
+            Some(instant) => self.set_wait_until(instant),
+            None => self.set_wait(),
         }
     }
+
+    /// Sets this to [`ExitWithCode`]`(code)`.
+    ///
+    /// [`ExitWithCode`]: Self::ExitWithCode
+    pub fn set_exit_with_code(&mut self, code: i32) {
+        *self = Self::ExitWithCode(code);
+    }
+
+    /// Sets this to [`Exit`].
+    ///
+    /// [`Exit`]: Self::Exit
+    pub fn set_exit(&mut self) {
+        *self = Self::Exit;
+    }
+}
+
+impl Default for ControlFlow {
+    #[inline(always)]
+    fn default() -> Self {
+        Self::Poll
+    }
 }
 
 impl EventLoop<()> {
@@ -195,46 +268,42 @@ impl EventLoop<()> {
     ///
     /// [`EventLoopBuilder::new().build()`]: EventLoopBuilder::build
     #[inline]
-    pub fn new() -> Result<EventLoop<()>, EventLoopError> {
+    pub fn new() -> EventLoop<()> {
         EventLoopBuilder::new().build()
     }
 }
 
+impl Default for EventLoop<()> {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl<T> EventLoop<T> {
     #[deprecated = "Use `EventLoopBuilder::<T>::with_user_event().build()` instead."]
-    pub fn with_user_event() -> Result<EventLoop<T>, EventLoopError> {
+    pub fn with_user_event() -> EventLoop<T> {
         EventLoopBuilder::<T>::with_user_event().build()
     }
 
-    /// Runs the event loop in the calling thread and calls the given `event_handler` closure
-    /// to dispatch any pending events.
-    ///
-    /// Since the closure is `'static`, it must be a `move` closure if it needs to
+    /// Hijacks the calling thread and initializes the winit event loop with the provided
+    /// closure. Since the closure is `'static`, it must be a `move` closure if it needs to
     /// access any data from the calling context.
     ///
-    /// See the [`set_control_flow()`] docs on how to change the event loop's behavior.
+    /// See the [`ControlFlow`] docs for information on how changes to `&mut ControlFlow` impact the
+    /// event loop's behavior.
+    ///
+    /// Any values not passed to this function will *not* be dropped.
     ///
     /// ## Platform-specific
     ///
-    /// - **iOS:** Will never return to the caller and so values not passed to this function will
-    ///   *not* be dropped before the process exits.
-    /// - **Web:** Will _act_ as if it never returns to the caller by throwing a Javascript exception
-    ///   (that Rust doesn't see) that will also mean that the rest of the function is never executed
-    ///   and any values not passed to this function will *not* be dropped.
+    /// - **X11 / Wayland:** The program terminates with exit code 1 if the display server
+    ///   disconnects.
     ///
-    ///   Web applications are recommended to use `spawn()` instead of `run()` to avoid the need
-    ///   for the Javascript exception trick, and to make it clearer that the event loop runs
-    ///   asynchronously (via the browser's own, internal, event loop) and doesn't block the
-    ///   current thread of execution like it does on other platforms.
-    ///
-    ///   This function won't be available with `target_feature = "exception-handling"`.
-    ///
-    /// [`set_control_flow()`]: EventLoopWindowTarget::set_control_flow
+    /// [`ControlFlow`]: crate::event_loop::ControlFlow
     #[inline]
-    #[cfg(not(all(wasm_platform, target_feature = "exception-handling")))]
-    pub fn run<F>(self, event_handler: F) -> Result<(), EventLoopError>
+    pub fn run<F>(self, event_handler: F) -> !
     where
-        F: FnMut(Event<T>, &EventLoopWindowTarget<T>),
+        F: 'static + FnMut(Event<'_, T>, &EventLoopWindowTarget<T>, &mut ControlFlow),
     {
         self.event_loop.run(event_handler)
     }
@@ -247,18 +316,10 @@ impl<T> EventLoop<T> {
     }
 }
 
-#[cfg(feature = "rwh_06")]
-impl<T> rwh_06::HasDisplayHandle for EventLoop<T> {
-    fn display_handle(&self) -> Result<rwh_06::DisplayHandle<'_>, rwh_06::HandleError> {
-        rwh_06::HasDisplayHandle::display_handle(&**self)
-    }
-}
-
-#[cfg(feature = "rwh_05")]
-unsafe impl<T> rwh_05::HasRawDisplayHandle for EventLoop<T> {
+unsafe impl<T> HasRawDisplayHandle for EventLoop<T> {
     /// Returns a [`raw_window_handle::RawDisplayHandle`] for the event loop.
-    fn raw_display_handle(&self) -> rwh_05::RawDisplayHandle {
-        rwh_05::HasRawDisplayHandle::raw_display_handle(&**self)
+    fn raw_display_handle(&self) -> RawDisplayHandle {
+        self.event_loop.window_target().p.raw_display_handle()
     }
 }
 
@@ -286,7 +347,7 @@ impl<T> EventLoopWindowTarget<T> {
     ///
     /// ## Platform-specific
     ///
-    /// **Wayland / Web:** Always returns `None`.
+    /// **Wayland:** Always returns `None`.
     #[inline]
     pub fn primary_monitor(&self) -> Option<MonitorHandle> {
         self.p
@@ -305,49 +366,16 @@ impl<T> EventLoopWindowTarget<T> {
     /// - **Wayland / macOS / iOS / Android / Orbital:** Unsupported.
     ///
     /// [`DeviceEvent`]: crate::event::DeviceEvent
-    pub fn listen_device_events(&self, allowed: DeviceEvents) {
-        self.p.listen_device_events(allowed);
-    }
-
-    /// Sets the [`ControlFlow`].
-    pub fn set_control_flow(&self, control_flow: ControlFlow) {
-        self.p.set_control_flow(control_flow)
-    }
-
-    /// Gets the current [`ControlFlow`].
-    pub fn control_flow(&self) -> ControlFlow {
-        self.p.control_flow()
-    }
-
-    /// This exits the event loop.
-    ///
-    /// See [`LoopExiting`](Event::LoopExiting).
-    pub fn exit(&self) {
-        self.p.exit()
-    }
-
-    /// Returns if the [`EventLoop`] is about to stop.
-    ///
-    /// See [`exit()`](Self::exit).
-    pub fn exiting(&self) -> bool {
-        self.p.exiting()
+    pub fn listen_device_events(&self, _allowed: DeviceEvents) {
+        #[cfg(any(x11_platform, wasm_platform, wayland_platform, windows))]
+        self.p.listen_device_events(_allowed);
     }
 }
 
-#[cfg(feature = "rwh_06")]
-impl<T> rwh_06::HasDisplayHandle for EventLoopWindowTarget<T> {
-    fn display_handle(&self) -> Result<rwh_06::DisplayHandle<'_>, rwh_06::HandleError> {
-        let raw = self.p.raw_display_handle_rwh_06()?;
-        // SAFETY: The display will never be deallocated while the event loop is alive.
-        Ok(unsafe { rwh_06::DisplayHandle::borrow_raw(raw) })
-    }
-}
-
-#[cfg(feature = "rwh_05")]
-unsafe impl<T> rwh_05::HasRawDisplayHandle for EventLoopWindowTarget<T> {
+unsafe impl<T> HasRawDisplayHandle for EventLoopWindowTarget<T> {
     /// Returns a [`raw_window_handle::RawDisplayHandle`] for the event loop.
-    fn raw_display_handle(&self) -> rwh_05::RawDisplayHandle {
-        self.p.raw_display_handle_rwh_05()
+    fn raw_display_handle(&self) -> RawDisplayHandle {
+        self.p.raw_display_handle()
     }
 }
 
@@ -409,29 +437,3 @@ pub enum DeviceEvents {
     /// Never capture device events.
     Never,
 }
-
-/// A unique identifier of the winit's async request.
-///
-/// This could be used to identify the async request once it's done
-/// and a specific action must be taken.
-///
-/// One of the handling scenarious could be to maintain a working list
-/// containing [`AsyncRequestSerial`] and some closure associated with it.
-/// Then once event is arriving the working list is being traversed and a job
-/// executed and removed from the list.
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-pub struct AsyncRequestSerial {
-    serial: u64,
-}
-
-impl AsyncRequestSerial {
-    // TODO(kchibisov) remove `cfg` when the clipboard will be added.
-    #[allow(dead_code)]
-    pub(crate) fn get() -> Self {
-        static CURRENT_SERIAL: AtomicU64 = AtomicU64::new(0);
-        // NOTE: we rely on wrap around here, while the user may just request
-        // in the loop u64::MAX times that's issue is considered on them.
-        let serial = CURRENT_SERIAL.fetch_add(1, Ordering::Relaxed);
-        Self { serial }
-    }
-}

src/keyboard.rs

@@ -69,7 +69,7 @@
 //
 // --------- END OF W3C SHORT NOTICE ---------------------------------------------------------------
 
-pub use smol_str::SmolStr;
+use smol_str::SmolStr;
 
 /// Contains the platform-native physical key identifier
 ///
@@ -82,7 +82,7 @@ pub use smol_str::SmolStr;
 ///
 /// - Correctly match key press and release events.
 /// - On non-web platforms, support assigning keybinds to virtually any key through a UI.
-#[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[derive(Clone, Copy, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum NativeKeyCode {
     Unidentified,
@@ -135,7 +135,7 @@ impl std::fmt::Debug for NativeKeyCode {
 /// This enum is primarily used to store raw keysym when Winit doesn't map a given native logical
 /// key identifier to a meaningful [`Key`] variant. This lets you use [`Key`], and let the user
 /// define keybinds which work in the presence of identifiers we haven't mapped for you yet.
-#[derive(Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
+#[derive(Clone, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum NativeKey {
     Unidentified,
@@ -196,7 +196,7 @@ impl std::fmt::Debug for NativeKey {
 ///
 /// [`KeyboardEvent.code`]: https://w3c.github.io/uievents-code/#code-value-tables
 #[non_exhaustive]
-#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Hash)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum KeyCode {
     /// This variant is used when the key cannot be translated to any other variant.
@@ -662,7 +662,7 @@ pub enum KeyCode {
 ///
 /// [`KeyboardEvent.key`]: https://w3c.github.io/uievents-key/
 #[non_exhaustive]
-#[derive(Debug, Clone, PartialEq, Eq, Hash, PartialOrd, Ord)]
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum Key<Str = SmolStr> {
     /// A key string that corresponds to the character typed by the user, taking into account the

src/lib.rs

@@ -7,7 +7,7 @@
 //!
 //! ```no_run
 //! use winit::event_loop::EventLoop;
-//! let event_loop = EventLoop::new().unwrap();
+//! let event_loop = EventLoop::new();
 //! ```
 //!
 //! Once this is done there are two ways to create a [`Window`]:
@@ -30,44 +30,46 @@
 //!
 //! You can retrieve events by calling [`EventLoop::run`][event_loop_run]. This function will
 //! dispatch events for every [`Window`] that was created with that particular [`EventLoop`], and
-//! will run until [`exit()`] is used, at which point [`Event`]`::`[`LoopExiting`].
+//! will run until the `control_flow` argument given to the closure is set to
+//! [`ControlFlow`]`::`[`ExitWithCode`] (which [`ControlFlow`]`::`[`Exit`] aliases to), at which
+//! point [`Event`]`::`[`LoopDestroyed`] is emitted and the entire program terminates.
 //!
 //! Winit no longer uses a `EventLoop::poll_events() -> impl Iterator<Event>`-based event loop
 //! model, since that can't be implemented properly on some platforms (e.g web, iOS) and works poorly on
 //! most other platforms. However, this model can be re-implemented to an extent with
-//! [`EventLoopExtPumpEvents::pump_events`]. See that method's documentation for more reasons about why
+//! [`EventLoopExtRunReturn::run_return`]. See that method's documentation for more reasons about why
 //! it's discouraged, beyond compatibility reasons.
 //!
 //!
 //! ```no_run
 //! use winit::{
 //!     event::{Event, WindowEvent},
-//!     event_loop::{ControlFlow, EventLoop},
+//!     event_loop::EventLoop,
 //!     window::WindowBuilder,
 //! };
 //!
-//! let event_loop = EventLoop::new().unwrap();
+//! let event_loop = EventLoop::new();
 //! let window = WindowBuilder::new().build(&event_loop).unwrap();
 //!
-//! // ControlFlow::Poll continuously runs the event loop, even if the OS hasn't
-//! // dispatched any events. This is ideal for games and similar applications.
-//! event_loop.set_control_flow(ControlFlow::Poll);
+//! event_loop.run(move |event, _, control_flow| {
+//!     // ControlFlow::Poll continuously runs the event loop, even if the OS hasn't
+//!     // dispatched any events. This is ideal for games and similar applications.
+//!     control_flow.set_poll();
 //!
-//! // ControlFlow::Wait pauses the event loop if no events are available to process.
-//! // This is ideal for non-game applications that only update in response to user
-//! // input, and uses significantly less power/CPU time than ControlFlow::Poll.
-//! event_loop.set_control_flow(ControlFlow::Wait);
+//!     // ControlFlow::Wait pauses the event loop if no events are available to process.
+//!     // This is ideal for non-game applications that only update in response to user
+//!     // input, and uses significantly less power/CPU time than ControlFlow::Poll.
+//!     control_flow.set_wait();
 //!
-//! event_loop.run(move |event, elwt| {
 //!     match event {
 //!         Event::WindowEvent {
 //!             event: WindowEvent::CloseRequested,
 //!             ..
 //!         } => {
 //!             println!("The close button was pressed; stopping");
-//!             elwt.exit();
+//!             control_flow.set_exit();
 //!         },
-//!         Event::AboutToWait => {
+//!         Event::MainEventsCleared => {
 //!             // Application update code.
 //!
 //!             // Queue a RedrawRequested event.
@@ -77,14 +79,11 @@
 //!             // can just render here instead.
 //!             window.request_redraw();
 //!         },
-//!         Event::WindowEvent {
-//!             event: WindowEvent::RedrawRequested,
-//!             ..
-//!         } => {
+//!         Event::RedrawRequested(_) => {
 //!             // Redraw the application.
 //!             //
 //!             // It's preferable for applications that do not render continuously to render in
-//!             // this event rather than in AboutToWait, since rendering in here allows
+//!             // this event rather than in MainEventsCleared, since rendering in here allows
 //!             // the program to gracefully handle redraws requested by the OS.
 //!         },
 //!         _ => ()
@@ -110,10 +109,12 @@
 //! window visible only once you're ready to render into it.
 //!
 //! [`EventLoop`]: event_loop::EventLoop
-//! [`EventLoopExtPumpEvents::pump_events`]: ./platform/pump_events/trait.EventLoopExtPumpEvents.html#tymethod.pump_events
+//! [`EventLoopExtRunReturn::run_return`]: ./platform/run_return/trait.EventLoopExtRunReturn.html#tymethod.run_return
 //! [`EventLoop::new()`]: event_loop::EventLoop::new
 //! [event_loop_run]: event_loop::EventLoop::run
-//! [`exit()`]: event_loop::EventLoopWindowTarget::exit
+//! [`ControlFlow`]: event_loop::ControlFlow
+//! [`Exit`]: event_loop::ControlFlow::Exit
+//! [`ExitWithCode`]: event_loop::ControlFlow::ExitWithCode
 //! [`Window`]: window::Window
 //! [`WindowId`]: window::WindowId
 //! [`WindowBuilder`]: window::WindowBuilder
@@ -125,7 +126,7 @@
 //! [`WindowEvent`]: event::WindowEvent
 //! [`DeviceEvent`]: event::DeviceEvent
 //! [`UserEvent`]: event::Event::UserEvent
-//! [`LoopExiting`]: event::Event::LoopExiting
+//! [`LoopDestroyed`]: event::Event::LoopDestroyed
 //! [`platform`]: platform
 //! [`raw_window_handle`]: ./window/struct.Window.html#method.raw_window_handle
 //! [`raw_display_handle`]: ./window/struct.Window.html#method.raw_display_handle
@@ -133,15 +134,11 @@
 #![deny(rust_2018_idioms)]
 #![deny(rustdoc::broken_intra_doc_links)]
 #![deny(clippy::all)]
-#![deny(unsafe_op_in_unsafe_fn)]
 #![cfg_attr(feature = "cargo-clippy", deny(warnings))]
 // Doc feature labels can be tested locally by running RUSTDOCFLAGS="--cfg=docsrs" cargo +nightly doc
 #![cfg_attr(docsrs, feature(doc_auto_cfg))]
 #![allow(clippy::missing_safety_doc)]
 
-#[cfg(feature = "rwh_06")]
-pub use rwh_06 as raw_window_handle;
-
 #[allow(unused_imports)]
 #[macro_use]
 extern crate log;

src/monitor.rs

@@ -108,12 +108,20 @@ impl MonitorHandle {
     /// Returns a human-readable name of the monitor.
     ///
     /// Returns `None` if the monitor doesn't exist anymore.
+    ///
+    /// ## Platform-specific
+    ///
+    /// - **Web:** Always returns None
     #[inline]
     pub fn name(&self) -> Option<String> {
         self.inner.name()
     }
 
     /// Returns the monitor's resolution.
+    ///
+    /// ## Platform-specific
+    ///
+    /// - **Web:** Always returns (0,0)
     #[inline]
     pub fn size(&self) -> PhysicalSize<u32> {
         self.inner.size()
@@ -121,6 +129,10 @@ impl MonitorHandle {
 
     /// Returns the top-left corner position of the monitor relative to the larger full
     /// screen area.
+    ///
+    /// ## Platform-specific
+    ///
+    /// - **Web:** Always returns (0,0)
     #[inline]
     pub fn position(&self) -> PhysicalPosition<i32> {
         self.inner.position()
@@ -146,6 +158,7 @@ impl MonitorHandle {
     ///
     /// - **X11:** Can be overridden using the `WINIT_X11_SCALE_FACTOR` environment variable.
     /// - **Android:** Always returns 1.0.
+    /// - **Web:** Always returns 1.0
     #[inline]
     pub fn scale_factor(&self) -> f64 {
         self.inner.scale_factor()

src/platform/ios.rs

@@ -1,6 +1,5 @@
 use std::os::raw::c_void;
 
-use icrate::Foundation::MainThreadMarker;
 use objc2::rc::Id;
 
 use crate::{
@@ -23,6 +22,27 @@ impl<T: 'static> EventLoopExtIOS for EventLoop<T> {
 
 /// Additional methods on [`Window`] that are specific to iOS.
 pub trait WindowExtIOS {
+    /// Returns a pointer to the [`UIWindow`] that is used by this window.
+    ///
+    /// The pointer will become invalid when the [`Window`] is destroyed.
+    ///
+    /// [`UIWindow`]: https://developer.apple.com/documentation/uikit/uiwindow?language=objc
+    fn ui_window(&self) -> *mut c_void;
+
+    /// Returns a pointer to the [`UIViewController`] that is used by this window.
+    ///
+    /// The pointer will become invalid when the [`Window`] is destroyed.
+    ///
+    /// [`UIViewController`]: https://developer.apple.com/documentation/uikit/uiviewcontroller?language=objc
+    fn ui_view_controller(&self) -> *mut c_void;
+
+    /// Returns a pointer to the [`UIView`] that is used by this window.
+    ///
+    /// The pointer will become invalid when the [`Window`] is destroyed.
+    ///
+    /// [`UIView`]: https://developer.apple.com/documentation/uikit/uiview?language=objc
+    fn ui_view(&self) -> *mut c_void;
+
     /// Sets the [`contentScaleFactor`] of the underlying [`UIWindow`] to `scale_factor`.
     ///
     /// The default value is device dependent, and it's recommended GLES or Metal applications set
@@ -77,35 +97,45 @@ pub trait WindowExtIOS {
 }
 
 impl WindowExtIOS for Window {
+    #[inline]
+    fn ui_window(&self) -> *mut c_void {
+        self.window.ui_window()
+    }
+
+    #[inline]
+    fn ui_view_controller(&self) -> *mut c_void {
+        self.window.ui_view_controller()
+    }
+
+    #[inline]
+    fn ui_view(&self) -> *mut c_void {
+        self.window.ui_view()
+    }
+
     #[inline]
     fn set_scale_factor(&self, scale_factor: f64) {
-        self.window
-            .maybe_queue_on_main(move |w| w.set_scale_factor(scale_factor))
+        self.window.set_scale_factor(scale_factor)
     }
 
     #[inline]
     fn set_valid_orientations(&self, valid_orientations: ValidOrientations) {
-        self.window
-            .maybe_queue_on_main(move |w| w.set_valid_orientations(valid_orientations))
+        self.window.set_valid_orientations(valid_orientations)
     }
 
     #[inline]
     fn set_prefers_home_indicator_hidden(&self, hidden: bool) {
-        self.window
-            .maybe_queue_on_main(move |w| w.set_prefers_home_indicator_hidden(hidden))
+        self.window.set_prefers_home_indicator_hidden(hidden)
     }
 
     #[inline]
     fn set_preferred_screen_edges_deferring_system_gestures(&self, edges: ScreenEdge) {
-        self.window.maybe_queue_on_main(move |w| {
-            w.set_preferred_screen_edges_deferring_system_gestures(edges)
-        })
+        self.window
+            .set_preferred_screen_edges_deferring_system_gestures(edges)
     }
 
     #[inline]
     fn set_prefers_status_bar_hidden(&self, hidden: bool) {
-        self.window
-            .maybe_queue_on_main(move |w| w.set_prefers_status_bar_hidden(hidden))
+        self.window.set_prefers_status_bar_hidden(hidden)
     }
 }
 
@@ -118,7 +148,7 @@ pub trait WindowBuilderExtIOS {
     ///
     /// [`UIWindow`]: https://developer.apple.com/documentation/uikit/uiwindow?language=objc
     /// [`contentScaleFactor`]: https://developer.apple.com/documentation/uikit/uiview/1622657-contentscalefactor?language=objc
-    fn with_scale_factor(self, scale_factor: f64) -> Self;
+    fn with_scale_factor(self, scale_factor: f64) -> WindowBuilder;
 
     /// Sets the valid orientations for the [`Window`].
     ///
@@ -126,7 +156,7 @@ pub trait WindowBuilderExtIOS {
     ///
     /// This sets the initial value returned by
     /// [`-[UIViewController supportedInterfaceOrientations]`](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621435-supportedinterfaceorientations?language=objc).
-    fn with_valid_orientations(self, valid_orientations: ValidOrientations) -> Self;
+    fn with_valid_orientations(self, valid_orientations: ValidOrientations) -> WindowBuilder;
 
     /// Sets whether the [`Window`] prefers the home indicator hidden.
     ///
@@ -136,7 +166,7 @@ pub trait WindowBuilderExtIOS {
     /// [`-[UIViewController prefersHomeIndicatorAutoHidden]`](https://developer.apple.com/documentation/uikit/uiviewcontroller/2887510-prefershomeindicatorautohidden?language=objc).
     ///
     /// This only has an effect on iOS 11.0+.
-    fn with_prefers_home_indicator_hidden(self, hidden: bool) -> Self;
+    fn with_prefers_home_indicator_hidden(self, hidden: bool) -> WindowBuilder;
 
     /// Sets the screen edges for which the system gestures will take a lower priority than the
     /// application's touch handling.
@@ -145,7 +175,10 @@ pub trait WindowBuilderExtIOS {
     /// [`-[UIViewController preferredScreenEdgesDeferringSystemGestures]`](https://developer.apple.com/documentation/uikit/uiviewcontroller/2887512-preferredscreenedgesdeferringsys?language=objc).
     ///
     /// This only has an effect on iOS 11.0+.
-    fn with_preferred_screen_edges_deferring_system_gestures(self, edges: ScreenEdge) -> Self;
+    fn with_preferred_screen_edges_deferring_system_gestures(
+        self,
+        edges: ScreenEdge,
+    ) -> WindowBuilder;
 
     /// Sets whether the [`Window`] prefers the status bar hidden.
     ///
@@ -153,37 +186,40 @@ pub trait WindowBuilderExtIOS {
     ///
     /// This sets the initial value returned by
     /// [`-[UIViewController prefersStatusBarHidden]`](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621440-prefersstatusbarhidden?language=objc).
-    fn with_prefers_status_bar_hidden(self, hidden: bool) -> Self;
+    fn with_prefers_status_bar_hidden(self, hidden: bool) -> WindowBuilder;
 }
 
 impl WindowBuilderExtIOS for WindowBuilder {
     #[inline]
-    fn with_scale_factor(mut self, scale_factor: f64) -> Self {
+    fn with_scale_factor(mut self, scale_factor: f64) -> WindowBuilder {
         self.platform_specific.scale_factor = Some(scale_factor);
         self
     }
 
     #[inline]
-    fn with_valid_orientations(mut self, valid_orientations: ValidOrientations) -> Self {
+    fn with_valid_orientations(mut self, valid_orientations: ValidOrientations) -> WindowBuilder {
         self.platform_specific.valid_orientations = valid_orientations;
         self
     }
 
     #[inline]
-    fn with_prefers_home_indicator_hidden(mut self, hidden: bool) -> Self {
+    fn with_prefers_home_indicator_hidden(mut self, hidden: bool) -> WindowBuilder {
         self.platform_specific.prefers_home_indicator_hidden = hidden;
         self
     }
 
     #[inline]
-    fn with_preferred_screen_edges_deferring_system_gestures(mut self, edges: ScreenEdge) -> Self {
+    fn with_preferred_screen_edges_deferring_system_gestures(
+        mut self,
+        edges: ScreenEdge,
+    ) -> WindowBuilder {
         self.platform_specific
             .preferred_screen_edges_deferring_system_gestures = edges;
         self
     }
 
     #[inline]
-    fn with_prefers_status_bar_hidden(mut self, hidden: bool) -> Self {
+    fn with_prefers_status_bar_hidden(mut self, hidden: bool) -> WindowBuilder {
         self.platform_specific.prefers_status_bar_hidden = hidden;
         self
     }
@@ -205,9 +241,7 @@ pub trait MonitorHandleExtIOS {
 impl MonitorHandleExtIOS for MonitorHandle {
     #[inline]
     fn ui_screen(&self) -> *mut c_void {
-        // SAFETY: The marker is only used to get the pointer of the screen
-        let mtm = unsafe { MainThreadMarker::new_unchecked() };
-        Id::as_ptr(self.inner.ui_screen(mtm)) as *mut c_void
+        Id::as_ptr(self.inner.ui_screen()) as *mut c_void
     }
 
     #[inline]

src/platform/macos.rs

@@ -10,6 +10,16 @@ use crate::{
 
 /// Additional methods on [`Window`] that are specific to MacOS.
 pub trait WindowExtMacOS {
+    /// Returns a pointer to the cocoa `NSWindow` that is used by this window.
+    ///
+    /// The pointer will become invalid when the [`Window`] is destroyed.
+    fn ns_window(&self) -> *mut c_void;
+
+    /// Returns a pointer to the cocoa `NSView` that is used by this window.
+    ///
+    /// The pointer will become invalid when the [`Window`] is destroyed.
+    fn ns_view(&self) -> *mut c_void;
+
     /// Returns whether or not the window is in simple fullscreen mode.
     fn simple_fullscreen(&self) -> bool;
 
@@ -28,28 +38,6 @@ pub trait WindowExtMacOS {
     /// Sets whether or not the window has shadow.
     fn set_has_shadow(&self, has_shadow: bool);
 
-    /// Group windows together by using the same tabbing identifier.
-    ///
-    /// <https://developer.apple.com/documentation/appkit/nswindow/1644704-tabbingidentifier>
-    fn set_tabbing_identifier(&self, identifier: &str);
-
-    /// Returns the window's tabbing identifier.
-    fn tabbing_identifier(&self) -> String;
-
-    /// Select next tab.
-    fn select_next_tab(&self);
-
-    /// Select previous tab.
-    fn select_previous_tab(&self);
-
-    /// Select the tab with the given index.
-    ///
-    /// Will no-op when the index is out of bounds.
-    fn select_tab_at_index(&self, index: usize);
-
-    /// Get the number of tabs in the window tab group.
-    fn num_tabs(&self) -> usize;
-
     /// Get the window's edit state.
     ///
     /// # Examples
@@ -82,80 +70,54 @@ pub trait WindowExtMacOS {
 }
 
 impl WindowExtMacOS for Window {
+    #[inline]
+    fn ns_window(&self) -> *mut c_void {
+        self.window.ns_window()
+    }
+
+    #[inline]
+    fn ns_view(&self) -> *mut c_void {
+        self.window.ns_view()
+    }
+
     #[inline]
     fn simple_fullscreen(&self) -> bool {
-        self.window.maybe_wait_on_main(|w| w.simple_fullscreen())
+        self.window.simple_fullscreen()
     }
 
     #[inline]
     fn set_simple_fullscreen(&self, fullscreen: bool) -> bool {
-        self.window
-            .maybe_wait_on_main(move |w| w.set_simple_fullscreen(fullscreen))
+        self.window.set_simple_fullscreen(fullscreen)
     }
 
     #[inline]
     fn has_shadow(&self) -> bool {
-        self.window.maybe_wait_on_main(|w| w.has_shadow())
+        self.window.has_shadow()
     }
 
     #[inline]
     fn set_has_shadow(&self, has_shadow: bool) {
-        self.window
-            .maybe_queue_on_main(move |w| w.set_has_shadow(has_shadow))
-    }
-
-    #[inline]
-    fn set_tabbing_identifier(&self, identifier: &str) {
-        self.window
-            .maybe_wait_on_main(|w| w.set_tabbing_identifier(identifier))
-    }
-
-    #[inline]
-    fn tabbing_identifier(&self) -> String {
-        self.window.maybe_wait_on_main(|w| w.tabbing_identifier())
-    }
-
-    #[inline]
-    fn select_next_tab(&self) {
-        self.window.maybe_queue_on_main(|w| w.select_next_tab())
-    }
-
-    #[inline]
-    fn select_previous_tab(&self) {
-        self.window.maybe_queue_on_main(|w| w.select_previous_tab())
-    }
-
-    #[inline]
-    fn select_tab_at_index(&self, index: usize) {
-        self.window
-            .maybe_queue_on_main(move |w| w.select_tab_at_index(index))
-    }
-
-    #[inline]
-    fn num_tabs(&self) -> usize {
-        self.window.maybe_wait_on_main(|w| w.num_tabs())
+        self.window.set_has_shadow(has_shadow)
     }
 
     #[inline]
     fn is_document_edited(&self) -> bool {
-        self.window.maybe_wait_on_main(|w| w.is_document_edited())
+        self.window.is_document_edited()
     }
 
     #[inline]
     fn set_document_edited(&self, edited: bool) {
-        self.window
-            .maybe_queue_on_main(move |w| w.set_document_edited(edited))
+        self.window.set_document_edited(edited)
     }
 
     #[inline]
     fn set_option_as_alt(&self, option_as_alt: OptionAsAlt) {
-        self.window
-            .maybe_queue_on_main(move |w| w.set_option_as_alt(option_as_alt))
+        self.window.set_option_as_alt(option_as_alt)
     }
 
     #[inline]
     fn option_as_alt(&self) -> OptionAsAlt {
-        self.window.maybe_wait_on_main(|w| w.option_as_alt())
+        self.window.option_as_alt()
     }
 }
 
@@ -183,96 +145,88 @@ pub enum ActivationPolicy {
 /// - `with_fullsize_content_view`
 pub trait WindowBuilderExtMacOS {
     /// Enables click-and-drag behavior for the entire window, not just the titlebar.
-    fn with_movable_by_window_background(self, movable_by_window_background: bool) -> Self;
+    fn with_movable_by_window_background(self, movable_by_window_background: bool)
+        -> WindowBuilder;
     /// Makes the titlebar transparent and allows the content to appear behind it.
-    fn with_titlebar_transparent(self, titlebar_transparent: bool) -> Self;
+    fn with_titlebar_transparent(self, titlebar_transparent: bool) -> WindowBuilder;
     /// Hides the window title.
-    fn with_title_hidden(self, title_hidden: bool) -> Self;
+    fn with_title_hidden(self, title_hidden: bool) -> WindowBuilder;
     /// Hides the window titlebar.
-    fn with_titlebar_hidden(self, titlebar_hidden: bool) -> Self;
+    fn with_titlebar_hidden(self, titlebar_hidden: bool) -> WindowBuilder;
     /// Hides the window titlebar buttons.
-    fn with_titlebar_buttons_hidden(self, titlebar_buttons_hidden: bool) -> Self;
+    fn with_titlebar_buttons_hidden(self, titlebar_buttons_hidden: bool) -> WindowBuilder;
     /// Makes the window content appear behind the titlebar.
-    fn with_fullsize_content_view(self, fullsize_content_view: bool) -> Self;
-    fn with_disallow_hidpi(self, disallow_hidpi: bool) -> Self;
-    fn with_has_shadow(self, has_shadow: bool) -> Self;
+    fn with_fullsize_content_view(self, fullsize_content_view: bool) -> WindowBuilder;
+    fn with_disallow_hidpi(self, disallow_hidpi: bool) -> WindowBuilder;
+    fn with_has_shadow(self, has_shadow: bool) -> WindowBuilder;
     /// Window accepts click-through mouse events.
-    fn with_accepts_first_mouse(self, accepts_first_mouse: bool) -> Self;
-    /// Defines the window tabbing identifier.
-    ///
-    /// <https://developer.apple.com/documentation/appkit/nswindow/1644704-tabbingidentifier>
-    fn with_tabbing_identifier(self, identifier: &str) -> Self;
+    fn with_accepts_first_mouse(self, accepts_first_mouse: bool) -> WindowBuilder;
     /// Set how the <kbd>Option</kbd> keys are interpreted.
     ///
     /// See [`WindowExtMacOS::set_option_as_alt`] for details on what this means if set.
-    fn with_option_as_alt(self, option_as_alt: OptionAsAlt) -> Self;
+    fn with_option_as_alt(self, option_as_alt: OptionAsAlt) -> WindowBuilder;
 }
 
 impl WindowBuilderExtMacOS for WindowBuilder {
     #[inline]
-    fn with_movable_by_window_background(mut self, movable_by_window_background: bool) -> Self {
+    fn with_movable_by_window_background(
+        mut self,
+        movable_by_window_background: bool,
+    ) -> WindowBuilder {
         self.platform_specific.movable_by_window_background = movable_by_window_background;
         self
     }
 
     #[inline]
-    fn with_titlebar_transparent(mut self, titlebar_transparent: bool) -> Self {
+    fn with_titlebar_transparent(mut self, titlebar_transparent: bool) -> WindowBuilder {
         self.platform_specific.titlebar_transparent = titlebar_transparent;
         self
     }
 
     #[inline]
-    fn with_titlebar_hidden(mut self, titlebar_hidden: bool) -> Self {
+    fn with_titlebar_hidden(mut self, titlebar_hidden: bool) -> WindowBuilder {
         self.platform_specific.titlebar_hidden = titlebar_hidden;
         self
     }
 
     #[inline]
-    fn with_titlebar_buttons_hidden(mut self, titlebar_buttons_hidden: bool) -> Self {
+    fn with_titlebar_buttons_hidden(mut self, titlebar_buttons_hidden: bool) -> WindowBuilder {
         self.platform_specific.titlebar_buttons_hidden = titlebar_buttons_hidden;
         self
     }
 
     #[inline]
-    fn with_title_hidden(mut self, title_hidden: bool) -> Self {
+    fn with_title_hidden(mut self, title_hidden: bool) -> WindowBuilder {
         self.platform_specific.title_hidden = title_hidden;
         self
     }
 
     #[inline]
-    fn with_fullsize_content_view(mut self, fullsize_content_view: bool) -> Self {
+    fn with_fullsize_content_view(mut self, fullsize_content_view: bool) -> WindowBuilder {
         self.platform_specific.fullsize_content_view = fullsize_content_view;
         self
     }
 
     #[inline]
-    fn with_disallow_hidpi(mut self, disallow_hidpi: bool) -> Self {
+    fn with_disallow_hidpi(mut self, disallow_hidpi: bool) -> WindowBuilder {
         self.platform_specific.disallow_hidpi = disallow_hidpi;
         self
     }
 
     #[inline]
-    fn with_has_shadow(mut self, has_shadow: bool) -> Self {
+    fn with_has_shadow(mut self, has_shadow: bool) -> WindowBuilder {
         self.platform_specific.has_shadow = has_shadow;
         self
     }
 
     #[inline]
-    fn with_accepts_first_mouse(mut self, accepts_first_mouse: bool) -> Self {
+    fn with_accepts_first_mouse(mut self, accepts_first_mouse: bool) -> WindowBuilder {
         self.platform_specific.accepts_first_mouse = accepts_first_mouse;
         self
     }
 
     #[inline]
-    fn with_tabbing_identifier(mut self, tabbing_identifier: &str) -> Self {
-        self.platform_specific
-            .tabbing_identifier
-            .replace(tabbing_identifier.to_string());
-        self
-    }
-
-    #[inline]
-    fn with_option_as_alt(mut self, option_as_alt: OptionAsAlt) -> Self {
+    fn with_option_as_alt(mut self, option_as_alt: OptionAsAlt) -> WindowBuilder {
         self.platform_specific.option_as_alt = option_as_alt;
         self
     }
@@ -375,12 +329,6 @@ pub trait EventLoopWindowTargetExtMacOS {
     fn hide_application(&self);
     /// Hide the other applications. In most applications this is typically triggered with Command+Option-H.
     fn hide_other_applications(&self);
-    /// Set whether the system can automatically organize windows into tabs.
-    ///
-    /// <https://developer.apple.com/documentation/appkit/nswindow/1646657-allowsautomaticwindowtabbing>
-    fn set_allows_automatic_window_tabbing(&self, enabled: bool);
-    /// Returns whether the system can automatically organize windows into tabs.
-    fn allows_automatic_window_tabbing(&self) -> bool;
 }
 
 impl<T> EventLoopWindowTargetExtMacOS for EventLoopWindowTarget<T> {
@@ -391,14 +339,6 @@ impl<T> EventLoopWindowTargetExtMacOS for EventLoopWindowTarget<T> {
     fn hide_other_applications(&self) {
         self.p.hide_other_applications()
     }
-
-    fn set_allows_automatic_window_tabbing(&self, enabled: bool) {
-        self.p.set_allows_automatic_window_tabbing(enabled);
-    }
-
-    fn allows_automatic_window_tabbing(&self) -> bool {
-        self.p.allows_automatic_window_tabbing()
-    }
 }
 
 /// Option as alt behavior.

src/platform/mod.rs

@@ -9,10 +9,9 @@
 //!  - `windows`
 //!  - `web`
 //!
-//! And the following platform-specific modules:
+//! And the following platform-specific module:
 //!
-//! - `run_on_demand` (available on `windows`, `unix`, `macos`, `android`)
-//! - `pump_events` (available on `windows`, `unix`, `macos`, `android`)
+//! - `run_return` (available on `windows`, `unix`, `macos`, and `android`)
 //!
 //! However only the module corresponding to the platform you're compiling to will be available.
 
@@ -24,8 +23,6 @@ pub mod ios;
 pub mod macos;
 #[cfg(orbital_platform)]
 pub mod orbital;
-#[cfg(any(x11_platform, wayland_platform))]
-pub mod startup_notify;
 #[cfg(wayland_platform)]
 pub mod wayland;
 #[cfg(wasm_platform)]
@@ -35,23 +32,14 @@ pub mod windows;
 #[cfg(x11_platform)]
 pub mod x11;
 
-#[cfg(any(
-    windows_platform,
-    macos_platform,
-    android_platform,
-    x11_platform,
-    wayland_platform
-))]
-pub mod run_on_demand;
-
-#[cfg(any(
-    windows_platform,
-    macos_platform,
-    android_platform,
-    x11_platform,
-    wayland_platform
-))]
-pub mod pump_events;
-
 pub mod modifier_supplement;
+#[cfg(any(
+    windows_platform,
+    macos_platform,
+    android_platform,
+    x11_platform,
+    wayland_platform,
+    orbital_platform
+))]
+pub mod run_return;
 pub mod scancode;

src/platform/pump_events.rs

@@ -1,189 +0,0 @@
-use std::time::Duration;
-
-use crate::{
-    event::Event,
-    event_loop::{EventLoop, EventLoopWindowTarget},
-};
-
-/// The return status for `pump_events`
-pub enum PumpStatus {
-    /// Continue running external loop.
-    Continue,
-    /// Exit external loop.
-    Exit(i32),
-}
-
-/// Additional methods on [`EventLoop`] for pumping events within an external event loop
-pub trait EventLoopExtPumpEvents {
-    /// A type provided by the user that can be passed through [`Event::UserEvent`].
-    type UserEvent;
-
-    /// Pump the `EventLoop` to check for and dispatch pending events.
-    ///
-    /// This API is designed to enable applications to integrate Winit into an
-    /// external event loop, for platforms that can support this.
-    ///
-    /// The given `timeout` limits how long it may block waiting for new events.
-    ///
-    /// Passing a `timeout` of `Some(Duration::ZERO)` would ensure your external
-    /// event loop is never blocked but you would likely need to consider how
-    /// to throttle your own external loop.
-    ///
-    /// Passing a `timeout` of `None` means that it may wait indefinitely for new
-    /// events before returning control back to the external loop.
-    ///
-    /// ## Example
-    ///
-    /// ```rust,no_run
-    /// # // Copied from examples/window_pump_events.rs
-    /// # #[cfg(any(
-    /// #     windows_platform,
-    /// #     macos_platform,
-    /// #     x11_platform,
-    /// #     wayland_platform,
-    /// #     android_platform,
-    /// # ))]
-    /// fn main() -> std::process::ExitCode {
-    /// #     use std::{process::ExitCode, thread::sleep, time::Duration};
-    /// #
-    /// #     use simple_logger::SimpleLogger;
-    /// #     use winit::{
-    /// #         event::{Event, WindowEvent},
-    /// #         event_loop::EventLoop,
-    /// #         platform::pump_events::{EventLoopExtPumpEvents, PumpStatus},
-    /// #         window::WindowBuilder,
-    /// #     };
-    ///     let mut event_loop = EventLoop::new().unwrap();
-    /// #
-    /// #   SimpleLogger::new().init().unwrap();
-    ///     let window = WindowBuilder::new()
-    ///         .with_title("A fantastic window!")
-    ///         .build(&event_loop)
-    ///         .unwrap();
-    ///
-    ///     'main: loop {
-    ///         let timeout = Some(Duration::ZERO);
-    ///         let status = event_loop.pump_events(timeout, |event, elwt| {
-    /// #            if let Event::WindowEvent { event, .. } = &event {
-    /// #                // Print only Window events to reduce noise
-    /// #                println!("{event:?}");
-    /// #            }
-    /// #
-    ///             match event {
-    ///                 Event::WindowEvent {
-    ///                     event: WindowEvent::CloseRequested,
-    ///                     window_id,
-    ///                 } if window_id == window.id() => elwt.exit(),
-    ///                 Event::AboutToWait => {
-    ///                     window.request_redraw();
-    ///                 }
-    ///                 _ => (),
-    ///             }
-    ///         });
-    ///         if let PumpStatus::Exit(exit_code) = status {
-    ///             break 'main ExitCode::from(exit_code as u8);
-    ///         }
-    ///
-    ///         // Sleep for 1/60 second to simulate application work
-    ///         //
-    ///         // Since `pump_events` doesn't block it will be important to
-    ///         // throttle the loop in the app somehow.
-    ///         println!("Update()");
-    ///         sleep(Duration::from_millis(16));
-    ///     }
-    /// }
-    /// ```
-    ///
-    /// **Note:** This is not a portable API, and its usage involves a number of
-    /// caveats and trade offs that should be considered before using this API!
-    ///
-    /// You almost certainly shouldn't use this API, unless you absolutely know it's
-    /// the only practical option you have.
-    ///
-    /// ## Synchronous events
-    ///
-    /// Some events _must_ only be handled synchronously via the closure that
-    /// is passed to Winit so that the handler will also be synchronized with
-    /// the window system and operating system.
-    ///
-    /// This is because some events are driven by a window system callback
-    /// where the window systems expects the application to have handled the
-    /// event before returning.
-    ///
-    /// **These events can not be buffered and handled outside of the closure
-    /// passed to Winit.**
-    ///
-    /// As a general rule it is not recommended to ever buffer events to handle
-    /// them outside of the closure passed to Winit since it's difficult to
-    /// provide guarantees about which events are safe to buffer across all
-    /// operating systems.
-    ///
-    /// Notable events that will certainly create portability problems if
-    /// buffered and handled outside of Winit include:
-    /// - `RedrawRequested` events, used to schedule rendering.
-    ///
-    ///     macOS for example uses a `drawRect` callback to drive rendering
-    /// within applications and expects rendering to be finished before
-    /// the `drawRect` callback returns.
-    ///
-    ///     For portability it's strongly recommended that applications should
-    /// keep their rendering inside the closure provided to Winit.
-    /// - Any lifecycle events, such as `Suspended` / `Resumed`.
-    ///
-    ///     The handling of these events needs to be synchronized with the
-    /// operating system and it would never be appropriate to buffer a
-    /// notification that your application has been suspended or resumed and
-    /// then handled that later since there would always be a chance that
-    /// other lifecycle events occur while the event is buffered.
-    ///
-    /// ## Supported Platforms
-    /// - Windows
-    /// - Linux
-    /// - MacOS
-    /// - Android
-    ///
-    /// ## Unsupported Platforms
-    /// - **Web:**  This API is fundamentally incompatible with the event-based way in which
-    /// Web browsers work because it's not possible to have a long-running external
-    /// loop that would block the browser and there is nothing that can be
-    /// polled to ask for new new events. Events are delivered via callbacks based
-    /// on an event loop that is internal to the browser itself.
-    /// - **iOS:** It's not possible to stop and start an `NSApplication` repeatedly on iOS so
-    /// there's no way to support the same approach to polling as on MacOS.
-    ///
-    /// ## Platform-specific
-    /// - **Windows**: The implementation will use `PeekMessage` when checking for
-    ///   window messages to avoid blocking your external event loop.
-    ///
-    /// - **MacOS**: The implementation works in terms of stopping the global `NSApp`
-    ///   whenever the application `RunLoop` indicates that it is preparing to block
-    ///   and wait for new events.
-    ///
-    ///   This is very different to the polling APIs that are available on other
-    ///   platforms (the lower level polling primitives on MacOS are private
-    ///   implementation details for `NSApp` which aren't accessible to application
-    ///   developers)
-    ///
-    ///   It's likely this will be less efficient than polling on other OSs and
-    ///   it also means the `NSApp` is stopped while outside of the Winit
-    ///   event loop - and that's observable (for example to crates like `rfd`)
-    ///   because the `NSApp` is global state.
-    ///
-    ///   If you render outside of Winit you are likely to see window resizing artifacts
-    ///   since MacOS expects applications to render synchronously during any `drawRect`
-    ///   callback.
-    fn pump_events<F>(&mut self, timeout: Option<Duration>, event_handler: F) -> PumpStatus
-    where
-        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>);
-}
-
-impl<T> EventLoopExtPumpEvents for EventLoop<T> {
-    type UserEvent = T;
-
-    fn pump_events<F>(&mut self, timeout: Option<Duration>, event_handler: F) -> PumpStatus
-    where
-        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>),
-    {
-        self.event_loop.pump_events(timeout, event_handler)
-    }
-}

src/platform/run_on_demand.rs

@@ -1,76 +0,0 @@
-use crate::{
-    error::EventLoopError,
-    event::Event,
-    event_loop::{EventLoop, EventLoopWindowTarget},
-};
-
-#[cfg(doc)]
-use crate::{platform::pump_events::EventLoopExtPumpEvents, window::Window};
-
-/// Additional methods on [`EventLoop`] to return control flow to the caller.
-pub trait EventLoopExtRunOnDemand {
-    /// A type provided by the user that can be passed through [`Event::UserEvent`].
-    type UserEvent;
-
-    /// Runs the event loop in the calling thread and calls the given `event_handler` closure
-    /// to dispatch any window system events.
-    ///
-    /// Unlike [`EventLoop::run`], this function accepts non-`'static` (i.e. non-`move`) closures
-    /// and it is possible to return control back to the caller without
-    /// consuming the `EventLoop` (by using [`exit()`]) and
-    /// so the event loop can be re-run after it has exit.
-    ///
-    /// It's expected that each run of the loop will be for orthogonal instantiations of your
-    /// Winit application, but internally each instantiation may re-use some common window
-    /// system resources, such as a display server connection.
-    ///
-    /// This API is not designed to run an event loop in bursts that you can exit from and return
-    /// to while maintaining the full state of your application. (If you need something like this
-    /// you can look at the [`EventLoopExtPumpEvents::pump_events()`] API)
-    ///
-    /// Each time `run_on_demand` is called the `event_handler` can expect to receive a
-    /// `NewEvents(Init)` and `Resumed` event (even on platforms that have no suspend/resume
-    /// lifecycle) - which can be used to consistently initialize application state.
-    ///
-    /// See the [`set_control_flow()`] docs on how to change the event loop's behavior.
-    ///
-    /// # Caveats
-    /// - This extension isn't available on all platforms, since it's not always possible to
-    ///   return to the caller (specifically this is impossible on iOS and Web - though with
-    ///   the Web backend it is possible to use `spawn()` more than once instead).
-    /// - No [`Window`] state can be carried between separate runs of the event loop.
-    ///
-    /// You are strongly encouraged to use [`EventLoop::run()`] for portability, unless you specifically need
-    /// the ability to re-run a single event loop more than once
-    ///
-    /// # Supported Platforms
-    /// - Windows
-    /// - Linux
-    /// - macOS
-    /// - Android
-    ///
-    /// # Unsupported Platforms
-    /// - **Web:**  This API is fundamentally incompatible with the event-based way in which
-    ///   Web browsers work because it's not possible to have a long-running external
-    ///   loop that would block the browser and there is nothing that can be
-    ///   polled to ask for new events. Events are delivered via callbacks based
-    ///   on an event loop that is internal to the browser itself.
-    /// - **iOS:** It's not possible to stop and start an `NSApplication` repeatedly on iOS.
-    ///
-    /// [`exit()`]: EventLoopWindowTarget::exit
-    /// [`set_control_flow()`]: EventLoopWindowTarget::set_control_flow
-    fn run_on_demand<F>(&mut self, event_handler: F) -> Result<(), EventLoopError>
-    where
-        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>);
-}
-
-impl<T> EventLoopExtRunOnDemand for EventLoop<T> {
-    type UserEvent = T;
-
-    fn run_on_demand<F>(&mut self, event_handler: F) -> Result<(), EventLoopError>
-    where
-        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>),
-    {
-        self.event_loop.run_on_demand(event_handler)
-    }
-}

src/platform/run_return.rs

@@ -0,0 +1,53 @@
+use crate::{
+    event::Event,
+    event_loop::{ControlFlow, EventLoop, EventLoopWindowTarget},
+};
+
+/// Additional methods on [`EventLoop`] to return control flow to the caller.
+pub trait EventLoopExtRunReturn {
+    /// A type provided by the user that can be passed through [`Event::UserEvent`].
+    type UserEvent;
+
+    /// Initializes the `winit` event loop.
+    ///
+    /// Unlike [`EventLoop::run`], this function accepts non-`'static` (i.e. non-`move`) closures
+    /// and returns control flow to the caller when `control_flow` is set to [`ControlFlow::Exit`].
+    ///
+    /// # Caveats
+    ///
+    /// Despite its appearance at first glance, this is *not* a perfect replacement for
+    /// `poll_events`. For example, this function will not return on Windows or macOS while a
+    /// window is getting resized, resulting in all application logic outside of the
+    /// `event_handler` closure not running until the resize operation ends. Other OS operations
+    /// may also result in such freezes. This behavior is caused by fundamental limitations in the
+    /// underlying OS APIs, which cannot be hidden by `winit` without severe stability repercussions.
+    ///
+    /// You are strongly encouraged to use `run`, unless the use of this is absolutely necessary.
+    ///
+    /// ## Platform-specific
+    ///
+    /// - **X11 / Wayland:** This function returns `1` upon disconnection from
+    ///   the display server.
+    fn run_return<F>(&mut self, event_handler: F) -> i32
+    where
+        F: FnMut(
+            Event<'_, Self::UserEvent>,
+            &EventLoopWindowTarget<Self::UserEvent>,
+            &mut ControlFlow,
+        );
+}
+
+impl<T> EventLoopExtRunReturn for EventLoop<T> {
+    type UserEvent = T;
+
+    fn run_return<F>(&mut self, event_handler: F) -> i32
+    where
+        F: FnMut(
+            Event<'_, Self::UserEvent>,
+            &EventLoopWindowTarget<Self::UserEvent>,
+            &mut ControlFlow,
+        ),
+    {
+        self.event_loop.run_return(event_handler)
+    }
+}

src/platform/startup_notify.rs

@@ -1,99 +0,0 @@
-//! Window startup notification to handle window raising.
-//!
-//! The [`ActivationToken`] is essential to ensure that your newly
-//! created window will obtain the focus, otherwise the user could
-//! be requered to click on the window.
-//!
-//! Such token is usually delivered via the environment variable and
-//! could be read from it with the [`EventLoopExtStartupNotify::read_token_from_env`].
-//!
-//! Such token must also be reset after reading it from your environment with
-//! [`reset_activation_token_env`] otherwise child processes could inherit it.
-//!
-//! When starting a new child process with a newly obtained [`ActivationToken`] from
-//! [`WindowExtStartupNotify::request_activation_token`] the [`set_activation_token_env`]
-//! must be used to propagate it to the child
-//!
-//! To ensure the delivery of such token by other processes to you, the user should
-//! set `StartupNotify=true` inside the `.desktop` file of their application.
-//!
-//! The specification could be found [`here`].
-//!
-//! [`here`]: https://specifications.freedesktop.org/startup-notification-spec/startup-notification-latest.txt
-
-use std::env;
-
-use crate::error::NotSupportedError;
-use crate::event_loop::{AsyncRequestSerial, EventLoopWindowTarget};
-use crate::window::{ActivationToken, Window, WindowBuilder};
-
-/// The variable which is used mostly on X11.
-const X11_VAR: &str = "DESKTOP_STARTUP_ID";
-
-/// The variable which is used mostly on Wayland.
-const WAYLAND_VAR: &str = "XDG_ACTIVATION_TOKEN";
-
-pub trait EventLoopExtStartupNotify {
-    /// Read the token from the environment.
-    ///
-    /// It's recommended **to unset** this environment variable for child processes.
-    fn read_token_from_env(&self) -> Option<ActivationToken>;
-}
-
-pub trait WindowExtStartupNotify {
-    /// Request a new activation token.
-    ///
-    /// The token will be delivered inside
-    fn request_activation_token(&self) -> Result<AsyncRequestSerial, NotSupportedError>;
-}
-
-pub trait WindowBuilderExtStartupNotify {
-    /// Use this [`ActivationToken`] during window creation.
-    ///
-    /// Not using such a token upon a window could make your window not gaining
-    /// focus until the user clicks on the window.
-    fn with_activation_token(self, token: ActivationToken) -> Self;
-}
-
-impl<T> EventLoopExtStartupNotify for EventLoopWindowTarget<T> {
-    fn read_token_from_env(&self) -> Option<ActivationToken> {
-        match self.p {
-            #[cfg(wayland_platform)]
-            crate::platform_impl::EventLoopWindowTarget::Wayland(_) => env::var(WAYLAND_VAR),
-            #[cfg(x11_platform)]
-            crate::platform_impl::EventLoopWindowTarget::X(_) => env::var(X11_VAR),
-        }
-        .ok()
-        .map(ActivationToken::_new)
-    }
-}
-
-impl WindowExtStartupNotify for Window {
-    fn request_activation_token(&self) -> Result<AsyncRequestSerial, NotSupportedError> {
-        self.window.request_activation_token()
-    }
-}
-
-impl WindowBuilderExtStartupNotify for WindowBuilder {
-    fn with_activation_token(mut self, token: ActivationToken) -> Self {
-        self.platform_specific.activation_token = Some(token);
-        self
-    }
-}
-
-/// Remove the activation environment variables from the current process.
-///
-/// This is wise to do before running child processes,
-/// which may not to support the activation token.
-pub fn reset_activation_token_env() {
-    env::remove_var(X11_VAR);
-    env::remove_var(WAYLAND_VAR);
-}
-
-/// Set environment variables responsible for activation token.
-///
-/// This could be used before running daemon processes.
-pub fn set_activation_token_env(token: ActivationToken) {
-    env::set_var(X11_VAR, &token._token);
-    env::set_var(WAYLAND_VAR, token._token);
-}

src/platform/wayland.rs

@@ -1,10 +1,17 @@
+use std::os::raw;
+
+use sctk::reexports::client::Proxy;
+
 use crate::{
     event_loop::{EventLoopBuilder, EventLoopWindowTarget},
     monitor::MonitorHandle,
     window::{Window, WindowBuilder},
 };
 
-use crate::platform_impl::{ApplicationName, Backend};
+use crate::platform_impl::{
+    ApplicationName, Backend, EventLoopWindowTarget as LinuxEventLoopWindowTarget,
+    Window as LinuxWindow,
+};
 
 pub use crate::window::Theme;
 
@@ -12,6 +19,16 @@ pub use crate::window::Theme;
 pub trait EventLoopWindowTargetExtWayland {
     /// True if the [`EventLoopWindowTarget`] uses Wayland.
     fn is_wayland(&self) -> bool;
+
+    /// Returns a pointer to the `wl_display` object of wayland that is used by this
+    /// [`EventLoopWindowTarget`].
+    ///
+    /// Returns `None` if the [`EventLoop`] doesn't use wayland (if it uses xlib for example).
+    ///
+    /// The pointer will become invalid when the winit [`EventLoop`] is destroyed.
+    ///
+    /// [`EventLoop`]: crate::event_loop::EventLoop
+    fn wayland_display(&self) -> Option<*mut raw::c_void>;
 }
 
 impl<T> EventLoopWindowTargetExtWayland for EventLoopWindowTarget<T> {
@@ -19,6 +36,17 @@ impl<T> EventLoopWindowTargetExtWayland for EventLoopWindowTarget<T> {
     fn is_wayland(&self) -> bool {
         self.p.is_wayland()
     }
+
+    #[inline]
+    fn wayland_display(&self) -> Option<*mut raw::c_void> {
+        match self.p {
+            LinuxEventLoopWindowTarget::Wayland(ref p) => {
+                Some(p.connection.display().id().as_ptr() as *mut _)
+            }
+            #[cfg(x11_platform)]
+            _ => None,
+        }
+    }
 }
 
 /// Additional methods on [`EventLoopBuilder`] that are specific to Wayland.
@@ -48,9 +76,41 @@ impl<T> EventLoopBuilderExtWayland for EventLoopBuilder<T> {
 }
 
 /// Additional methods on [`Window`] that are specific to Wayland.
-pub trait WindowExtWayland {}
+pub trait WindowExtWayland {
+    /// Returns a pointer to the `wl_surface` object of wayland that is used by this window.
+    ///
+    /// Returns `None` if the window doesn't use wayland (if it uses xlib for example).
+    ///
+    /// The pointer will become invalid when the [`Window`] is destroyed.
+    fn wayland_surface(&self) -> Option<*mut raw::c_void>;
 
-impl WindowExtWayland for Window {}
+    /// Returns a pointer to the `wl_display` object of wayland that is used by this window.
+    ///
+    /// Returns `None` if the window doesn't use wayland (if it uses xlib for example).
+    ///
+    /// The pointer will become invalid when the [`Window`] is destroyed.
+    fn wayland_display(&self) -> Option<*mut raw::c_void>;
+}
+
+impl WindowExtWayland for Window {
+    #[inline]
+    fn wayland_surface(&self) -> Option<*mut raw::c_void> {
+        match self.window {
+            LinuxWindow::Wayland(ref w) => Some(w.surface().id().as_ptr() as *mut _),
+            #[cfg(x11_platform)]
+            _ => None,
+        }
+    }
+
+    #[inline]
+    fn wayland_display(&self) -> Option<*mut raw::c_void> {
+        match self.window {
+            LinuxWindow::Wayland(ref w) => Some(w.display().id().as_ptr() as *mut _),
+            #[cfg(x11_platform)]
+            _ => None,
+        }
+    }
+}
 
 /// Additional methods on [`WindowBuilder`] that are specific to Wayland.
 pub trait WindowBuilderExtWayland {

src/platform/web.rs

@@ -2,57 +2,24 @@
 //! allow end users to determine how the page should be laid out. Use the [`WindowExtWebSys`] trait
 //! to retrieve the canvas from the Window. Alternatively, use the [`WindowBuilderExtWebSys`] trait
 //! to provide your own canvas.
-//!
-//! It is recommended **not** to apply certain CSS properties to the canvas:
-//! - [`transform`]
-//! - [`border`]
-//! - [`padding`]
-//!
-//! The following APIs can't take them into account and will therefore provide inaccurate results:
-//! - [`WindowEvent::Resized`] and [`Window::(set_)inner_size()`]
-//! - [`WindowEvent::Occluded`]
-//! - [`WindowEvent::CursorMoved`], [`WindowEvent::CursorEntered`], [`WindowEvent::CursorLeft`],
-//!   and [`WindowEvent::Touch`].
-//! - [`Window::set_outer_position()`]
-//!
-//! [`WindowEvent::Resized`]: crate::event::WindowEvent::Resized
-//! [`Window::(set_)inner_size()`]: crate::window::Window::inner_size()
-//! [`WindowEvent::Occluded`]: crate::event::WindowEvent::Occluded
-//! [`WindowEvent::CursorMoved`]: crate::event::WindowEvent::CursorMoved
-//! [`WindowEvent::CursorEntered`]: crate::event::WindowEvent::CursorEntered
-//! [`WindowEvent::CursorLeft`]: crate::event::WindowEvent::CursorLeft
-//! [`WindowEvent::Touch`]: crate::event::WindowEvent::Touch
-//! [`Window::set_outer_position()`]: crate::window::Window::set_outer_position()
-//! [`transform`]: https://developer.mozilla.org/en-US/docs/Web/CSS/transform
-//! [`border`]: https://developer.mozilla.org/en-US/docs/Web/CSS/border
-//! [`padding`]: https://developer.mozilla.org/en-US/docs/Web/CSS/padding
 
 use crate::event::Event;
+use crate::event_loop::ControlFlow;
 use crate::event_loop::EventLoop;
 use crate::event_loop::EventLoopWindowTarget;
-use crate::window::{Window, WindowBuilder};
+use crate::window::WindowBuilder;
 
 use web_sys::HtmlCanvasElement;
 
 pub trait WindowExtWebSys {
     /// Only returns the canvas if called from inside the window.
     fn canvas(&self) -> Option<HtmlCanvasElement>;
-}
 
-impl WindowExtWebSys for Window {
-    #[inline]
-    fn canvas(&self) -> Option<HtmlCanvasElement> {
-        self.window.canvas()
-    }
+    /// Whether the browser reports the preferred color scheme to be "dark".
+    fn is_dark_mode(&self) -> bool;
 }
 
 pub trait WindowBuilderExtWebSys {
-    /// Pass an [`HtmlCanvasElement`] to be used for this [`Window`]. If [`None`],
-    /// [`WindowBuilder::build()`] will create one.
-    ///
-    /// In any case, the canvas won't be automatically inserted into the web page.
-    ///
-    /// [`None`] by default.
     fn with_canvas(self, canvas: Option<HtmlCanvasElement>) -> Self;
 
     /// Whether `event.preventDefault` should be automatically called to prevent event propagation
@@ -63,20 +30,11 @@ pub trait WindowBuilderExtWebSys {
     ///
     /// Some events are impossible to prevent. E.g. Firefox allows to access the native browser
     /// context menu with Shift+Rightclick.
-    ///
-    /// Enabled by default.
     fn with_prevent_default(self, prevent_default: bool) -> Self;
 
     /// Whether the canvas should be focusable using the tab key. This is necessary to capture
     /// canvas keyboard events.
-    ///
-    /// Enabled by default.
     fn with_focusable(self, focusable: bool) -> Self;
-
-    /// On window creation, append the canvas element to the web page if it isn't already.
-    ///
-    /// Disabled by default.
-    fn with_append(self, append: bool) -> Self;
 }
 
 impl WindowBuilderExtWebSys for WindowBuilder {
@@ -97,12 +55,6 @@ impl WindowBuilderExtWebSys for WindowBuilder {
 
         self
     }
-
-    fn with_append(mut self, append: bool) -> Self {
-        self.platform_specific.append = append;
-
-        self
-    }
 }
 
 /// Additional methods on `EventLoop` that are specific to the web.
@@ -121,7 +73,12 @@ pub trait EventLoopExtWebSys {
     /// event loop when switching between tabs on a single page application.
     fn spawn<F>(self, event_handler: F)
     where
-        F: 'static + FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>);
+        F: 'static
+            + FnMut(
+                Event<'_, Self::UserEvent>,
+                &EventLoopWindowTarget<Self::UserEvent>,
+                &mut ControlFlow,
+            );
 }
 
 impl<T> EventLoopExtWebSys for EventLoop<T> {
@@ -129,62 +86,13 @@ impl<T> EventLoopExtWebSys for EventLoop<T> {
 
     fn spawn<F>(self, event_handler: F)
     where
-        F: 'static + FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>),
+        F: 'static
+            + FnMut(
+                Event<'_, Self::UserEvent>,
+                &EventLoopWindowTarget<Self::UserEvent>,
+                &mut ControlFlow,
+            ),
     {
         self.event_loop.spawn(event_handler)
     }
 }
-
-pub trait EventLoopWindowTargetExtWebSys {
-    /// Sets the strategy for [`ControlFlow::Poll`].
-    ///
-    /// See [`PollStrategy`].
-    ///
-    /// [`ControlFlow::Poll`]: crate::event_loop::ControlFlow::Poll
-    fn set_poll_strategy(&self, strategy: PollStrategy);
-
-    /// Gets the strategy for [`ControlFlow::Poll`].
-    ///
-    /// See [`PollStrategy`].
-    ///
-    /// [`ControlFlow::Poll`]: crate::event_loop::ControlFlow::Poll
-    fn poll_strategy(&self) -> PollStrategy;
-}
-
-impl<T> EventLoopWindowTargetExtWebSys for EventLoopWindowTarget<T> {
-    #[inline]
-    fn set_poll_strategy(&self, strategy: PollStrategy) {
-        self.p.set_poll_strategy(strategy);
-    }
-
-    #[inline]
-    fn poll_strategy(&self) -> PollStrategy {
-        self.p.poll_strategy()
-    }
-}
-
-/// Strategy used for [`ControlFlow::Poll`](crate::event_loop::ControlFlow::Poll).
-#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
-pub enum PollStrategy {
-    /// Uses [`Window.requestIdleCallback()`] to queue the next event loop. If not available
-    /// this will fallback to [`setTimeout()`].
-    ///
-    /// This strategy will wait for the browser to enter an idle period before running and might
-    /// be affected by browser throttling.
-    ///
-    /// [`Window.requestIdleCallback()`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/requestIdleCallback
-    /// [`setTimeout()`]: https://developer.mozilla.org/en-US/docs/Web/API/setTimeout
-    IdleCallback,
-    /// Uses the [Prioritized Task Scheduling API] to queue the next event loop. If not available
-    /// this will fallback to [`setTimeout()`].
-    ///
-    /// This strategy will run as fast as possible without disturbing users from interacting with
-    /// the page and is not affected by browser throttling.
-    ///
-    /// This is the default strategy.
-    ///
-    /// [Prioritized Task Scheduling API]: https://developer.mozilla.org/en-US/docs/Web/API/Prioritized_Task_Scheduling_API
-    /// [`setTimeout()`]: https://developer.mozilla.org/en-US/docs/Web/API/setTimeout
-    #[default]
-    Scheduler,
-}

src/platform/windows.rs

@@ -17,6 +17,8 @@ pub type HWND = isize;
 pub type HMENU = isize;
 /// Monitor Handle type used by Win32 API
 pub type HMONITOR = isize;
+/// Instance Handle type used by Win32 API
+pub type HINSTANCE = isize;
 
 /// Additional methods on `EventLoop` that are specific to Windows.
 pub trait EventLoopBuilderExtWindows {
@@ -111,6 +113,13 @@ impl<T> EventLoopBuilderExtWindows for EventLoopBuilder<T> {
 
 /// Additional methods on `Window` that are specific to Windows.
 pub trait WindowExtWindows {
+    /// Returns the HINSTANCE of the window
+    fn hinstance(&self) -> HINSTANCE;
+    /// Returns the native handle that is used by this window.
+    ///
+    /// The pointer will become invalid when the native window was destroyed.
+    fn hwnd(&self) -> HWND;
+
     /// Enables or disables mouse and keyboard input to the specified window.
     ///
     /// A window must be enabled before it can be activated.
@@ -139,6 +148,16 @@ pub trait WindowExtWindows {
 }
 
 impl WindowExtWindows for Window {
+    #[inline]
+    fn hinstance(&self) -> HINSTANCE {
+        self.window.hinstance()
+    }
+
+    #[inline]
+    fn hwnd(&self) -> HWND {
+        self.window.hwnd()
+    }
+
     #[inline]
     fn set_enable(&self, enabled: bool) {
         self.window.set_enable(enabled)
@@ -161,7 +180,6 @@ impl WindowExtWindows for Window {
 }
 
 /// Additional methods on `WindowBuilder` that are specific to Windows.
-#[allow(rustdoc::broken_intra_doc_links)]
 pub trait WindowBuilderExtWindows {
     /// Set an owner to the window to be created. Can be used to create a dialog box, for example.
     /// This only works when [`WindowBuilder::with_parent_window`] isn't called or set to `None`.
@@ -174,7 +192,7 @@ pub trait WindowBuilderExtWindows {
     /// - An owned window is hidden when its owner is minimized.
     ///
     /// For more information, see <https://docs.microsoft.com/en-us/windows/win32/winmsg/window-features#owned-windows>
-    fn with_owner_window(self, parent: HWND) -> Self;
+    fn with_owner_window(self, parent: HWND) -> WindowBuilder;
 
     /// Sets a menu on the window to be created.
     ///
@@ -186,13 +204,13 @@ pub trait WindowBuilderExtWindows {
     /// If you use this, it is recommended that you combine it with `with_theme(Some(Theme::Light))` to avoid a jarring effect.
     ///
     /// [`CreateMenu`]: windows_sys::Win32::UI::WindowsAndMessaging::CreateMenu
-    fn with_menu(self, menu: HMENU) -> Self;
+    fn with_menu(self, menu: HMENU) -> WindowBuilder;
 
     /// This sets `ICON_BIG`. A good ceiling here is 256x256.
-    fn with_taskbar_icon(self, taskbar_icon: Option<Icon>) -> Self;
+    fn with_taskbar_icon(self, taskbar_icon: Option<Icon>) -> WindowBuilder;
 
     /// This sets `WS_EX_NOREDIRECTIONBITMAP`.
-    fn with_no_redirection_bitmap(self, flag: bool) -> Self;
+    fn with_no_redirection_bitmap(self, flag: bool) -> WindowBuilder;
 
     /// Enables or disables drag and drop support (enabled by default). Will interfere with other crates
     /// that use multi-threaded COM API (`CoInitializeEx` with `COINIT_MULTITHREADED` instead of
@@ -200,66 +218,57 @@ pub trait WindowBuilderExtWindows {
     /// COM API regardless of this option. Currently only fullscreen mode does that, but there may be more in the future.
     /// If you need COM API with `COINIT_MULTITHREADED` you must initialize it before calling any winit functions.
     /// See <https://docs.microsoft.com/en-us/windows/win32/api/objbase/nf-objbase-coinitialize#remarks> for more information.
-    fn with_drag_and_drop(self, flag: bool) -> Self;
+    fn with_drag_and_drop(self, flag: bool) -> WindowBuilder;
 
     /// Whether show or hide the window icon in the taskbar.
-    fn with_skip_taskbar(self, skip: bool) -> Self;
-
-    /// Customize the window class name.
-    fn with_class_name<S: Into<String>>(self, class_name: S) -> Self;
+    fn with_skip_taskbar(self, skip: bool) -> WindowBuilder;
 
     /// Shows or hides the background drop shadow for undecorated windows.
     ///
     /// The shadow is hidden by default.
     /// Enabling the shadow causes a thin 1px line to appear on the top of the window.
-    fn with_undecorated_shadow(self, shadow: bool) -> Self;
+    fn with_undecorated_shadow(self, shadow: bool) -> WindowBuilder;
 }
 
 impl WindowBuilderExtWindows for WindowBuilder {
     #[inline]
-    fn with_owner_window(mut self, parent: HWND) -> Self {
+    fn with_owner_window(mut self, parent: HWND) -> WindowBuilder {
         self.platform_specific.owner = Some(parent);
         self
     }
 
     #[inline]
-    fn with_menu(mut self, menu: HMENU) -> Self {
+    fn with_menu(mut self, menu: HMENU) -> WindowBuilder {
         self.platform_specific.menu = Some(menu);
         self
     }
 
     #[inline]
-    fn with_taskbar_icon(mut self, taskbar_icon: Option<Icon>) -> Self {
+    fn with_taskbar_icon(mut self, taskbar_icon: Option<Icon>) -> WindowBuilder {
         self.platform_specific.taskbar_icon = taskbar_icon;
         self
     }
 
     #[inline]
-    fn with_no_redirection_bitmap(mut self, flag: bool) -> Self {
+    fn with_no_redirection_bitmap(mut self, flag: bool) -> WindowBuilder {
         self.platform_specific.no_redirection_bitmap = flag;
         self
     }
 
     #[inline]
-    fn with_drag_and_drop(mut self, flag: bool) -> Self {
+    fn with_drag_and_drop(mut self, flag: bool) -> WindowBuilder {
         self.platform_specific.drag_and_drop = flag;
         self
     }
 
     #[inline]
-    fn with_skip_taskbar(mut self, skip: bool) -> Self {
+    fn with_skip_taskbar(mut self, skip: bool) -> WindowBuilder {
         self.platform_specific.skip_taskbar = skip;
         self
     }
 
     #[inline]
-    fn with_class_name<S: Into<String>>(mut self, class_name: S) -> Self {
-        self.platform_specific.class_name = class_name.into();
-        self
-    }
-
-    #[inline]
-    fn with_undecorated_shadow(mut self, shadow: bool) -> Self {
+    fn with_undecorated_shadow(mut self, shadow: bool) -> WindowBuilder {
         self.platform_specific.decoration_shadow = shadow;
         self
     }

src/platform/x11.rs

@@ -1,3 +1,6 @@
+use std::os::raw;
+use std::ptr;
+
 use crate::{
     event_loop::{EventLoopBuilder, EventLoopWindowTarget},
     monitor::MonitorHandle,
@@ -5,7 +8,9 @@ use crate::{
 };
 
 use crate::dpi::Size;
-use crate::platform_impl::{ApplicationName, Backend, XLIB_ERROR_HOOKS};
+use crate::platform_impl::{
+    x11::ffi::XVisualInfo, ApplicationName, Backend, Window as LinuxWindow, XLIB_ERROR_HOOKS,
+};
 
 pub use crate::platform_impl::{x11::util::WindowType as XWindowType, XNotSupported};
 
@@ -17,12 +22,6 @@ pub use crate::platform_impl::{x11::util::WindowType as XWindowType, XNotSupport
 pub type XlibErrorHook =
     Box<dyn Fn(*mut std::ffi::c_void, *mut std::ffi::c_void) -> bool + Send + Sync>;
 
-/// A unique identifer for an X11 visual.
-pub type XVisualID = u32;
-
-/// A unique identifier for an X11 window.
-pub type XWindow = u32;
-
 /// Hook to winit's xlib error handling callback.
 ///
 /// This method is provided as a safe way to handle the errors comming from X11
@@ -82,14 +81,70 @@ impl<T> EventLoopBuilderExtX11 for EventLoopBuilder<T> {
 }
 
 /// Additional methods on [`Window`] that are specific to X11.
-pub trait WindowExtX11 {}
+pub trait WindowExtX11 {
+    /// Returns the ID of the [`Window`] xlib object that is used by this window.
+    ///
+    /// Returns `None` if the window doesn't use xlib (if it uses wayland for example).
+    fn xlib_window(&self) -> Option<raw::c_ulong>;
 
-impl WindowExtX11 for Window {}
+    /// Returns a pointer to the `Display` object of xlib that is used by this window.
+    ///
+    /// Returns `None` if the window doesn't use xlib (if it uses wayland for example).
+    ///
+    /// The pointer will become invalid when the [`Window`] is destroyed.
+    fn xlib_display(&self) -> Option<*mut raw::c_void>;
+
+    fn xlib_screen_id(&self) -> Option<raw::c_int>;
+
+    /// This function returns the underlying `xcb_connection_t` of an xlib `Display`.
+    ///
+    /// Returns `None` if the window doesn't use xlib (if it uses wayland for example).
+    ///
+    /// The pointer will become invalid when the [`Window`] is destroyed.
+    fn xcb_connection(&self) -> Option<*mut raw::c_void>;
+}
+
+impl WindowExtX11 for Window {
+    #[inline]
+    fn xlib_window(&self) -> Option<raw::c_ulong> {
+        match self.window {
+            LinuxWindow::X(ref w) => Some(w.xlib_window()),
+            #[cfg(wayland_platform)]
+            _ => None,
+        }
+    }
+
+    #[inline]
+    fn xlib_display(&self) -> Option<*mut raw::c_void> {
+        match self.window {
+            LinuxWindow::X(ref w) => Some(w.xlib_display()),
+            #[cfg(wayland_platform)]
+            _ => None,
+        }
+    }
+
+    #[inline]
+    fn xlib_screen_id(&self) -> Option<raw::c_int> {
+        match self.window {
+            LinuxWindow::X(ref w) => Some(w.xlib_screen_id()),
+            #[cfg(wayland_platform)]
+            _ => None,
+        }
+    }
+
+    #[inline]
+    fn xcb_connection(&self) -> Option<*mut raw::c_void> {
+        match self.window {
+            LinuxWindow::X(ref w) => Some(w.xcb_connection()),
+            #[cfg(wayland_platform)]
+            _ => None,
+        }
+    }
+}
 
 /// Additional methods on [`WindowBuilder`] that are specific to X11.
 pub trait WindowBuilderExtX11 {
-    /// Create this window with a specific X11 visual.
-    fn with_x11_visual(self, visual_id: XVisualID) -> Self;
+    fn with_x11_visual<T>(self, visual_infos: *const T) -> Self;
 
     fn with_x11_screen(self, screen_id: i32) -> Self;
 
@@ -121,35 +176,21 @@ pub trait WindowBuilderExtX11 {
     /// WindowBuilder::new().with_base_size(PhysicalSize::new(400, 200));
     /// ```
     fn with_base_size<S: Into<Size>>(self, base_size: S) -> Self;
-
-    /// Embed this window into another parent window.
-    ///
-    /// # Example
-    ///
-    /// ```no_run
-    /// use winit::window::WindowBuilder;
-    /// use winit::platform::x11::{XWindow, WindowBuilderExtX11};
-    /// # fn main() -> Result<(), Box<dyn std::error::Error>> {
-    /// let event_loop = winit::event_loop::EventLoop::new().unwrap();
-    /// let parent_window_id = std::env::args().nth(1).unwrap().parse::<XWindow>()?;
-    /// let window = WindowBuilder::new()
-    ///     .with_embed_parent_window(parent_window_id)
-    ///     .build(&event_loop)?;
-    /// # Ok(()) }
-    /// ```
-    fn with_embed_parent_window(self, parent_window_id: XWindow) -> Self;
 }
 
 impl WindowBuilderExtX11 for WindowBuilder {
     #[inline]
-    fn with_x11_visual(mut self, visual_id: XVisualID) -> Self {
-        self.platform_specific.x11.visual_id = Some(visual_id);
+    fn with_x11_visual<T>(mut self, visual_infos: *const T) -> Self {
+        {
+            self.platform_specific.visual_infos =
+                Some(unsafe { ptr::read(visual_infos as *const XVisualInfo) });
+        }
         self
     }
 
     #[inline]
     fn with_x11_screen(mut self, screen_id: i32) -> Self {
-        self.platform_specific.x11.screen_id = Some(screen_id);
+        self.platform_specific.screen_id = Some(screen_id);
         self
     }
 
@@ -161,25 +202,19 @@ impl WindowBuilderExtX11 for WindowBuilder {
 
     #[inline]
     fn with_override_redirect(mut self, override_redirect: bool) -> Self {
-        self.platform_specific.x11.override_redirect = override_redirect;
+        self.platform_specific.override_redirect = override_redirect;
         self
     }
 
     #[inline]
     fn with_x11_window_type(mut self, x11_window_types: Vec<XWindowType>) -> Self {
-        self.platform_specific.x11.x11_window_types = x11_window_types;
+        self.platform_specific.x11_window_types = x11_window_types;
         self
     }
 
     #[inline]
     fn with_base_size<S: Into<Size>>(mut self, base_size: S) -> Self {
-        self.platform_specific.x11.base_size = Some(base_size.into());
-        self
-    }
-
-    #[inline]
-    fn with_embed_parent_window(mut self, parent_window_id: XWindow) -> Self {
-        self.platform_specific.x11.embed_window = Some(parent_window_id);
+        self.platform_specific.base_size = Some(base_size.into());
         self
     }
 }

src/platform_impl/android/keycodes.rs

@@ -1,7 +1,4 @@
-use android_activity::{
-    input::{KeyAction, KeyEvent, KeyMapChar, Keycode},
-    AndroidApp,
-};
+use android_activity::input::Keycode;
 
 use crate::keyboard::{Key, KeyCode, KeyLocation, NativeKey, NativeKeyCode};
 
@@ -159,403 +156,324 @@ pub fn to_physical_keycode(keycode: Keycode) -> KeyCode {
     }
 }
 
-/// Tries to map the `key_event` to a `KeyMapChar` containing a unicode character or dead key accent
-///
-/// This takes a `KeyEvent` and looks up its corresponding `KeyCharacterMap` and
-/// uses that to try and map the `key_code` + `meta_state` to a unicode
-/// character or a dead key that can be combined with the next key press.
-pub fn character_map_and_combine_key(
-    app: &AndroidApp,
-    key_event: &KeyEvent<'_>,
-    combining_accent: &mut Option<char>,
-) -> Option<KeyMapChar> {
-    let device_id = key_event.device_id();
-
-    let key_map = match app.device_key_character_map(device_id) {
-        Ok(key_map) => key_map,
-        Err(err) => {
-            log::warn!("Failed to look up `KeyCharacterMap` for device {device_id}: {err:?}");
-            return None;
-        }
-    };
-
-    match key_map.get(key_event.key_code(), key_event.meta_state()) {
-        Ok(KeyMapChar::Unicode(unicode)) => {
-            // Only do dead key combining on key down
-            if key_event.action() == KeyAction::Down {
-                let combined_unicode = if let Some(accent) = combining_accent {
-                    match key_map.get_dead_char(*accent, unicode) {
-                        Ok(Some(key)) => Some(key),
-                        Ok(None) => None,
-                        Err(err) => {
-                            log::warn!("KeyEvent: Failed to combine 'dead key' accent '{accent}' with '{unicode}': {err:?}");
-                            None
-                        }
-                    }
-                } else {
-                    Some(unicode)
-                };
-                *combining_accent = None;
-                combined_unicode.map(KeyMapChar::Unicode)
-            } else {
-                Some(KeyMapChar::Unicode(unicode))
-            }
-        }
-        Ok(KeyMapChar::CombiningAccent(accent)) => {
-            if key_event.action() == KeyAction::Down {
-                *combining_accent = Some(accent);
-            }
-            Some(KeyMapChar::CombiningAccent(accent))
-        }
-        Ok(KeyMapChar::None) => {
-            // Leave any combining_accent state in tact (seems to match how other
-            // Android apps work)
-            None
-        }
-        Err(err) => {
-            log::warn!("KeyEvent: Failed to get key map character: {err:?}");
-            *combining_accent = None;
-            None
-        }
-    }
-}
-
-pub fn to_logical(key_char: Option<KeyMapChar>, keycode: Keycode) -> Key {
+// TODO: We need to expose getUnicodeChar via android-activity instead of having
+// a fixed mapping from key codes
+pub fn to_logical(keycode: Keycode, native: NativeKey) -> Key {
     use android_activity::input::Keycode::*;
 
-    let native = NativeKey::Android(keycode.into());
+    match keycode {
+        Unknown => Key::Unidentified(native),
 
-    match key_char {
-        Some(KeyMapChar::Unicode(c)) => Key::Character(smol_str::SmolStr::from_iter([c])),
-        Some(KeyMapChar::CombiningAccent(c)) => Key::Dead(Some(c)),
-        None | Some(KeyMapChar::None) => match keycode {
-            // Using `BrowserHome` instead of `GoHome` according to
-            // https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key/Key_Values
-            Home => Key::BrowserHome,
-            Back => Key::BrowserBack,
-            Call => Key::Call,
-            Endcall => Key::EndCall,
+        // Can be added on demand
+        SoftLeft => Key::Unidentified(native),
+        SoftRight => Key::Unidentified(native),
 
-            //-------------------------------------------------------------------------------
-            // These should be redundant because they should have already been matched
-            // as `KeyMapChar::Unicode`, but also matched here as a fallback
-            Keycode0 => Key::Character("0".into()),
-            Keycode1 => Key::Character("1".into()),
-            Keycode2 => Key::Character("2".into()),
-            Keycode3 => Key::Character("3".into()),
-            Keycode4 => Key::Character("4".into()),
-            Keycode5 => Key::Character("5".into()),
-            Keycode6 => Key::Character("6".into()),
-            Keycode7 => Key::Character("7".into()),
-            Keycode8 => Key::Character("8".into()),
-            Keycode9 => Key::Character("9".into()),
-            Star => Key::Character("*".into()),
-            Pound => Key::Character("#".into()),
-            A => Key::Character("a".into()),
-            B => Key::Character("b".into()),
-            C => Key::Character("c".into()),
-            D => Key::Character("d".into()),
-            E => Key::Character("e".into()),
-            F => Key::Character("f".into()),
-            G => Key::Character("g".into()),
-            H => Key::Character("h".into()),
-            I => Key::Character("i".into()),
-            J => Key::Character("j".into()),
-            K => Key::Character("k".into()),
-            L => Key::Character("l".into()),
-            M => Key::Character("m".into()),
-            N => Key::Character("n".into()),
-            O => Key::Character("o".into()),
-            P => Key::Character("p".into()),
-            Q => Key::Character("q".into()),
-            R => Key::Character("r".into()),
-            S => Key::Character("s".into()),
-            T => Key::Character("t".into()),
-            U => Key::Character("u".into()),
-            V => Key::Character("v".into()),
-            W => Key::Character("w".into()),
-            X => Key::Character("x".into()),
-            Y => Key::Character("y".into()),
-            Z => Key::Character("z".into()),
-            Comma => Key::Character(",".into()),
-            Period => Key::Character(".".into()),
-            Grave => Key::Character("`".into()),
-            Minus => Key::Character("-".into()),
-            Equals => Key::Character("=".into()),
-            LeftBracket => Key::Character("[".into()),
-            RightBracket => Key::Character("]".into()),
-            Backslash => Key::Character("\\".into()),
-            Semicolon => Key::Character(";".into()),
-            Apostrophe => Key::Character("'".into()),
-            Slash => Key::Character("/".into()),
-            At => Key::Character("@".into()),
-            Plus => Key::Character("+".into()),
-            //-------------------------------------------------------------------------------
-            DpadUp => Key::ArrowUp,
-            DpadDown => Key::ArrowDown,
-            DpadLeft => Key::ArrowLeft,
-            DpadRight => Key::ArrowRight,
-            DpadCenter => Key::Enter,
+        // Using `BrowserHome` instead of `GoHome` according to
+        // https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key/Key_Values
+        Home => Key::BrowserHome,
+        Back => Key::BrowserBack,
+        Call => Key::Call,
+        Endcall => Key::EndCall,
 
-            VolumeUp => Key::AudioVolumeUp,
-            VolumeDown => Key::AudioVolumeDown,
-            Power => Key::Power,
-            Camera => Key::Camera,
-            Clear => Key::Clear,
+        //-------------------------------------------------------------------------------
+        // Reporting unidentified, because the specific character is layout dependent.
+        // (I'm not sure though)
+        Keycode0 => Key::Character("0".into()),
+        Keycode1 => Key::Character("1".into()),
+        Keycode2 => Key::Character("2".into()),
+        Keycode3 => Key::Character("3".into()),
+        Keycode4 => Key::Character("4".into()),
+        Keycode5 => Key::Character("5".into()),
+        Keycode6 => Key::Character("6".into()),
+        Keycode7 => Key::Character("7".into()),
+        Keycode8 => Key::Character("8".into()),
+        Keycode9 => Key::Character("9".into()),
+        Star => Key::Character("*".into()),
+        Pound => Key::Character("#".into()),
+        A => Key::Character("a".into()),
+        B => Key::Character("b".into()),
+        C => Key::Character("c".into()),
+        D => Key::Character("d".into()),
+        E => Key::Character("e".into()),
+        F => Key::Character("f".into()),
+        G => Key::Character("g".into()),
+        H => Key::Character("h".into()),
+        I => Key::Character("i".into()),
+        J => Key::Character("j".into()),
+        K => Key::Character("k".into()),
+        L => Key::Character("l".into()),
+        M => Key::Character("m".into()),
+        N => Key::Character("n".into()),
+        O => Key::Character("o".into()),
+        P => Key::Character("p".into()),
+        Q => Key::Character("q".into()),
+        R => Key::Character("r".into()),
+        S => Key::Character("s".into()),
+        T => Key::Character("t".into()),
+        U => Key::Character("u".into()),
+        V => Key::Character("v".into()),
+        W => Key::Character("w".into()),
+        X => Key::Character("x".into()),
+        Y => Key::Character("y".into()),
+        Z => Key::Character("z".into()),
+        Comma => Key::Character(",".into()),
+        Period => Key::Character(".".into()),
+        Grave => Key::Character("`".into()),
+        Minus => Key::Character("-".into()),
+        Equals => Key::Character("=".into()),
+        LeftBracket => Key::Character("[".into()),
+        RightBracket => Key::Character("]".into()),
+        Backslash => Key::Character("\\".into()),
+        Semicolon => Key::Character(";".into()),
+        Apostrophe => Key::Character("'".into()),
+        Slash => Key::Character("/".into()),
+        At => Key::Character("@".into()),
+        Plus => Key::Character("+".into()),
+        //-------------------------------------------------------------------------------
+        DpadUp => Key::ArrowUp,
+        DpadDown => Key::ArrowDown,
+        DpadLeft => Key::ArrowLeft,
+        DpadRight => Key::ArrowRight,
+        DpadCenter => Key::Enter,
 
-            AltLeft => Key::Alt,
-            AltRight => Key::Alt,
-            ShiftLeft => Key::Shift,
-            ShiftRight => Key::Shift,
-            Tab => Key::Tab,
-            Space => Key::Space,
-            Sym => Key::Symbol,
-            Explorer => Key::LaunchWebBrowser,
-            Envelope => Key::LaunchMail,
-            Enter => Key::Enter,
-            Del => Key::Backspace,
+        VolumeUp => Key::AudioVolumeUp,
+        VolumeDown => Key::AudioVolumeDown,
+        Power => Key::Power,
+        Camera => Key::Camera,
+        Clear => Key::Clear,
 
-            // According to https://developer.android.com/reference/android/view/KeyEvent#KEYCODE_NUM
-            Num => Key::Alt,
+        AltLeft => Key::Alt,
+        AltRight => Key::Alt,
+        ShiftLeft => Key::Shift,
+        ShiftRight => Key::Shift,
+        Tab => Key::Tab,
+        Space => Key::Space,
+        Sym => Key::Symbol,
+        Explorer => Key::LaunchWebBrowser,
+        Envelope => Key::LaunchMail,
+        Enter => Key::Enter,
+        Del => Key::Backspace,
 
-            Headsethook => Key::HeadsetHook,
-            Focus => Key::CameraFocus,
+        // According to https://developer.android.com/reference/android/view/KeyEvent#KEYCODE_NUM
+        Num => Key::Alt,
 
-            Notification => Key::Notification,
-            Search => Key::BrowserSearch,
-            MediaPlayPause => Key::MediaPlayPause,
-            MediaStop => Key::MediaStop,
-            MediaNext => Key::MediaTrackNext,
-            MediaPrevious => Key::MediaTrackPrevious,
-            MediaRewind => Key::MediaRewind,
-            MediaFastForward => Key::MediaFastForward,
-            Mute => Key::MicrophoneVolumeMute,
-            PageUp => Key::PageUp,
-            PageDown => Key::PageDown,
+        Headsethook => Key::HeadsetHook,
+        Focus => Key::CameraFocus,
 
-            Escape => Key::Escape,
-            ForwardDel => Key::Delete,
-            CtrlLeft => Key::Control,
-            CtrlRight => Key::Control,
-            CapsLock => Key::CapsLock,
-            ScrollLock => Key::ScrollLock,
-            MetaLeft => Key::Super,
-            MetaRight => Key::Super,
-            Function => Key::Fn,
-            Sysrq => Key::PrintScreen,
-            Break => Key::Pause,
-            MoveHome => Key::Home,
-            MoveEnd => Key::End,
-            Insert => Key::Insert,
-            Forward => Key::BrowserForward,
-            MediaPlay => Key::MediaPlay,
-            MediaPause => Key::MediaPause,
-            MediaClose => Key::MediaClose,
-            MediaEject => Key::Eject,
-            MediaRecord => Key::MediaRecord,
-            F1 => Key::F1,
-            F2 => Key::F2,
-            F3 => Key::F3,
-            F4 => Key::F4,
-            F5 => Key::F5,
-            F6 => Key::F6,
-            F7 => Key::F7,
-            F8 => Key::F8,
-            F9 => Key::F9,
-            F10 => Key::F10,
-            F11 => Key::F11,
-            F12 => Key::F12,
-            NumLock => Key::NumLock,
-            Numpad0 => Key::Character("0".into()),
-            Numpad1 => Key::Character("1".into()),
-            Numpad2 => Key::Character("2".into()),
-            Numpad3 => Key::Character("3".into()),
-            Numpad4 => Key::Character("4".into()),
-            Numpad5 => Key::Character("5".into()),
-            Numpad6 => Key::Character("6".into()),
-            Numpad7 => Key::Character("7".into()),
-            Numpad8 => Key::Character("8".into()),
-            Numpad9 => Key::Character("9".into()),
-            NumpadDivide => Key::Character("/".into()),
-            NumpadMultiply => Key::Character("*".into()),
-            NumpadSubtract => Key::Character("-".into()),
-            NumpadAdd => Key::Character("+".into()),
-            NumpadDot => Key::Character(".".into()),
-            NumpadComma => Key::Character(",".into()),
-            NumpadEnter => Key::Enter,
-            NumpadEquals => Key::Character("=".into()),
-            NumpadLeftParen => Key::Character("(".into()),
-            NumpadRightParen => Key::Character(")".into()),
+        Menu => Key::Unidentified(native),
 
-            VolumeMute => Key::AudioVolumeMute,
-            Info => Key::Info,
-            ChannelUp => Key::ChannelUp,
-            ChannelDown => Key::ChannelDown,
-            ZoomIn => Key::ZoomIn,
-            ZoomOut => Key::ZoomOut,
-            Tv => Key::TV,
-            Guide => Key::Guide,
-            Dvr => Key::DVR,
-            Bookmark => Key::BrowserFavorites,
-            Captions => Key::ClosedCaptionToggle,
-            Settings => Key::Settings,
-            TvPower => Key::TVPower,
-            TvInput => Key::TVInput,
-            StbPower => Key::STBPower,
-            StbInput => Key::STBInput,
-            AvrPower => Key::AVRPower,
-            AvrInput => Key::AVRInput,
-            ProgRed => Key::ColorF0Red,
-            ProgGreen => Key::ColorF1Green,
-            ProgYellow => Key::ColorF2Yellow,
-            ProgBlue => Key::ColorF3Blue,
-            AppSwitch => Key::AppSwitch,
-            LanguageSwitch => Key::GroupNext,
-            MannerMode => Key::MannerMode,
-            Keycode3dMode => Key::TV3DMode,
-            Contacts => Key::LaunchContacts,
-            Calendar => Key::LaunchCalendar,
-            Music => Key::LaunchMusicPlayer,
-            Calculator => Key::LaunchApplication2,
-            ZenkakuHankaku => Key::ZenkakuHankaku,
-            Eisu => Key::Eisu,
-            Muhenkan => Key::NonConvert,
-            Henkan => Key::Convert,
-            KatakanaHiragana => Key::HiraganaKatakana,
-            Kana => Key::KanjiMode,
-            BrightnessDown => Key::BrightnessDown,
-            BrightnessUp => Key::BrightnessUp,
-            MediaAudioTrack => Key::MediaAudioTrack,
-            Sleep => Key::Standby,
-            Wakeup => Key::WakeUp,
-            Pairing => Key::Pairing,
-            MediaTopMenu => Key::MediaTopMenu,
-            LastChannel => Key::MediaLast,
-            TvDataService => Key::TVDataService,
-            VoiceAssist => Key::VoiceDial,
-            TvRadioService => Key::TVRadioService,
-            TvTeletext => Key::Teletext,
-            TvNumberEntry => Key::TVNumberEntry,
-            TvTerrestrialAnalog => Key::TVTerrestrialAnalog,
-            TvTerrestrialDigital => Key::TVTerrestrialDigital,
-            TvSatellite => Key::TVSatellite,
-            TvSatelliteBs => Key::TVSatelliteBS,
-            TvSatelliteCs => Key::TVSatelliteCS,
-            TvSatelliteService => Key::TVSatelliteToggle,
-            TvNetwork => Key::TVNetwork,
-            TvAntennaCable => Key::TVAntennaCable,
-            TvInputHdmi1 => Key::TVInputHDMI1,
-            TvInputHdmi2 => Key::TVInputHDMI2,
-            TvInputHdmi3 => Key::TVInputHDMI3,
-            TvInputHdmi4 => Key::TVInputHDMI4,
-            TvInputComposite1 => Key::TVInputComposite1,
-            TvInputComposite2 => Key::TVInputComposite2,
-            TvInputComponent1 => Key::TVInputComponent1,
-            TvInputComponent2 => Key::TVInputComponent2,
-            TvInputVga1 => Key::TVInputVGA1,
-            TvAudioDescription => Key::TVAudioDescription,
-            TvAudioDescriptionMixUp => Key::TVAudioDescriptionMixUp,
-            TvAudioDescriptionMixDown => Key::TVAudioDescriptionMixDown,
-            TvZoomMode => Key::ZoomToggle,
-            TvContentsMenu => Key::TVContentsMenu,
-            TvMediaContextMenu => Key::TVMediaContext,
-            TvTimerProgramming => Key::TVTimer,
-            Help => Key::Help,
-            NavigatePrevious => Key::NavigatePrevious,
-            NavigateNext => Key::NavigateNext,
-            NavigateIn => Key::NavigateIn,
-            NavigateOut => Key::NavigateOut,
-            MediaSkipForward => Key::MediaSkipForward,
-            MediaSkipBackward => Key::MediaSkipBackward,
-            MediaStepForward => Key::MediaStepForward,
-            MediaStepBackward => Key::MediaStepBackward,
-            Cut => Key::Cut,
-            Copy => Key::Copy,
-            Paste => Key::Paste,
-            Refresh => Key::BrowserRefresh,
+        Notification => Key::Notification,
+        Search => Key::BrowserSearch,
+        MediaPlayPause => Key::MediaPlayPause,
+        MediaStop => Key::MediaStop,
+        MediaNext => Key::MediaTrackNext,
+        MediaPrevious => Key::MediaTrackPrevious,
+        MediaRewind => Key::MediaRewind,
+        MediaFastForward => Key::MediaFastForward,
+        Mute => Key::MicrophoneVolumeMute,
+        PageUp => Key::PageUp,
+        PageDown => Key::PageDown,
+        Pictsymbols => Key::Unidentified(native),
+        SwitchCharset => Key::Unidentified(native),
 
-            // -----------------------------------------------------------------
-            // Keycodes that don't have a logical Key mapping
-            // -----------------------------------------------------------------
-            Unknown => Key::Unidentified(native),
+        // -----------------------------------------------------------------
+        // Gamepad events should be exposed through a separate API, not
+        // keyboard events
+        ButtonA => Key::Unidentified(native),
+        ButtonB => Key::Unidentified(native),
+        ButtonC => Key::Unidentified(native),
+        ButtonX => Key::Unidentified(native),
+        ButtonY => Key::Unidentified(native),
+        ButtonZ => Key::Unidentified(native),
+        ButtonL1 => Key::Unidentified(native),
+        ButtonR1 => Key::Unidentified(native),
+        ButtonL2 => Key::Unidentified(native),
+        ButtonR2 => Key::Unidentified(native),
+        ButtonThumbl => Key::Unidentified(native),
+        ButtonThumbr => Key::Unidentified(native),
+        ButtonStart => Key::Unidentified(native),
+        ButtonSelect => Key::Unidentified(native),
+        ButtonMode => Key::Unidentified(native),
+        // -----------------------------------------------------------------
+        Escape => Key::Escape,
+        ForwardDel => Key::Delete,
+        CtrlLeft => Key::Control,
+        CtrlRight => Key::Control,
+        CapsLock => Key::CapsLock,
+        ScrollLock => Key::ScrollLock,
+        MetaLeft => Key::Super,
+        MetaRight => Key::Super,
+        Function => Key::Fn,
+        Sysrq => Key::PrintScreen,
+        Break => Key::Pause,
+        MoveHome => Key::Home,
+        MoveEnd => Key::End,
+        Insert => Key::Insert,
+        Forward => Key::BrowserForward,
+        MediaPlay => Key::MediaPlay,
+        MediaPause => Key::MediaPause,
+        MediaClose => Key::MediaClose,
+        MediaEject => Key::Eject,
+        MediaRecord => Key::MediaRecord,
+        F1 => Key::F1,
+        F2 => Key::F2,
+        F3 => Key::F3,
+        F4 => Key::F4,
+        F5 => Key::F5,
+        F6 => Key::F6,
+        F7 => Key::F7,
+        F8 => Key::F8,
+        F9 => Key::F9,
+        F10 => Key::F10,
+        F11 => Key::F11,
+        F12 => Key::F12,
+        NumLock => Key::NumLock,
+        Numpad0 => Key::Character("0".into()),
+        Numpad1 => Key::Character("1".into()),
+        Numpad2 => Key::Character("2".into()),
+        Numpad3 => Key::Character("3".into()),
+        Numpad4 => Key::Character("4".into()),
+        Numpad5 => Key::Character("5".into()),
+        Numpad6 => Key::Character("6".into()),
+        Numpad7 => Key::Character("7".into()),
+        Numpad8 => Key::Character("8".into()),
+        Numpad9 => Key::Character("9".into()),
+        NumpadDivide => Key::Character("/".into()),
+        NumpadMultiply => Key::Character("*".into()),
+        NumpadSubtract => Key::Character("-".into()),
+        NumpadAdd => Key::Character("+".into()),
+        NumpadDot => Key::Character(".".into()),
+        NumpadComma => Key::Character(",".into()),
+        NumpadEnter => Key::Enter,
+        NumpadEquals => Key::Character("=".into()),
+        NumpadLeftParen => Key::Character("(".into()),
+        NumpadRightParen => Key::Character(")".into()),
 
-            // Can be added on demand
-            SoftLeft => Key::Unidentified(native),
-            SoftRight => Key::Unidentified(native),
-
-            Menu => Key::Unidentified(native),
-
-            Pictsymbols => Key::Unidentified(native),
-            SwitchCharset => Key::Unidentified(native),
-
-            // -----------------------------------------------------------------
-            // Gamepad events should be exposed through a separate API, not
-            // keyboard events
-            ButtonA => Key::Unidentified(native),
-            ButtonB => Key::Unidentified(native),
-            ButtonC => Key::Unidentified(native),
-            ButtonX => Key::Unidentified(native),
-            ButtonY => Key::Unidentified(native),
-            ButtonZ => Key::Unidentified(native),
-            ButtonL1 => Key::Unidentified(native),
-            ButtonR1 => Key::Unidentified(native),
-            ButtonL2 => Key::Unidentified(native),
-            ButtonR2 => Key::Unidentified(native),
-            ButtonThumbl => Key::Unidentified(native),
-            ButtonThumbr => Key::Unidentified(native),
-            ButtonStart => Key::Unidentified(native),
-            ButtonSelect => Key::Unidentified(native),
-            ButtonMode => Key::Unidentified(native),
-            // -----------------------------------------------------------------
-            Window => Key::Unidentified(native),
-
-            Button1 => Key::Unidentified(native),
-            Button2 => Key::Unidentified(native),
-            Button3 => Key::Unidentified(native),
-            Button4 => Key::Unidentified(native),
-            Button5 => Key::Unidentified(native),
-            Button6 => Key::Unidentified(native),
-            Button7 => Key::Unidentified(native),
-            Button8 => Key::Unidentified(native),
-            Button9 => Key::Unidentified(native),
-            Button10 => Key::Unidentified(native),
-            Button11 => Key::Unidentified(native),
-            Button12 => Key::Unidentified(native),
-            Button13 => Key::Unidentified(native),
-            Button14 => Key::Unidentified(native),
-            Button15 => Key::Unidentified(native),
-            Button16 => Key::Unidentified(native),
-
-            Yen => Key::Unidentified(native),
-            Ro => Key::Unidentified(native),
-
-            Assist => Key::Unidentified(native),
-
-            Keycode11 => Key::Unidentified(native),
-            Keycode12 => Key::Unidentified(native),
-
-            StemPrimary => Key::Unidentified(native),
-            Stem1 => Key::Unidentified(native),
-            Stem2 => Key::Unidentified(native),
-            Stem3 => Key::Unidentified(native),
-
-            DpadUpLeft => Key::Unidentified(native),
-            DpadDownLeft => Key::Unidentified(native),
-            DpadUpRight => Key::Unidentified(native),
-            DpadDownRight => Key::Unidentified(native),
-
-            SoftSleep => Key::Unidentified(native),
-
-            SystemNavigationUp => Key::Unidentified(native),
-            SystemNavigationDown => Key::Unidentified(native),
-            SystemNavigationLeft => Key::Unidentified(native),
-            SystemNavigationRight => Key::Unidentified(native),
-
-            AllApps => Key::Unidentified(native),
-            ThumbsUp => Key::Unidentified(native),
-            ThumbsDown => Key::Unidentified(native),
-            ProfileSwitch => Key::Unidentified(native),
-        },
+        VolumeMute => Key::AudioVolumeMute,
+        Info => Key::Info,
+        ChannelUp => Key::ChannelUp,
+        ChannelDown => Key::ChannelDown,
+        ZoomIn => Key::ZoomIn,
+        ZoomOut => Key::ZoomOut,
+        Tv => Key::TV,
+        Window => Key::Unidentified(native),
+        Guide => Key::Guide,
+        Dvr => Key::DVR,
+        Bookmark => Key::BrowserFavorites,
+        Captions => Key::ClosedCaptionToggle,
+        Settings => Key::Settings,
+        TvPower => Key::TVPower,
+        TvInput => Key::TVInput,
+        StbPower => Key::STBPower,
+        StbInput => Key::STBInput,
+        AvrPower => Key::AVRPower,
+        AvrInput => Key::AVRInput,
+        ProgRed => Key::ColorF0Red,
+        ProgGreen => Key::ColorF1Green,
+        ProgYellow => Key::ColorF2Yellow,
+        ProgBlue => Key::ColorF3Blue,
+        AppSwitch => Key::AppSwitch,
+        Button1 => Key::Unidentified(native),
+        Button2 => Key::Unidentified(native),
+        Button3 => Key::Unidentified(native),
+        Button4 => Key::Unidentified(native),
+        Button5 => Key::Unidentified(native),
+        Button6 => Key::Unidentified(native),
+        Button7 => Key::Unidentified(native),
+        Button8 => Key::Unidentified(native),
+        Button9 => Key::Unidentified(native),
+        Button10 => Key::Unidentified(native),
+        Button11 => Key::Unidentified(native),
+        Button12 => Key::Unidentified(native),
+        Button13 => Key::Unidentified(native),
+        Button14 => Key::Unidentified(native),
+        Button15 => Key::Unidentified(native),
+        Button16 => Key::Unidentified(native),
+        LanguageSwitch => Key::GroupNext,
+        MannerMode => Key::MannerMode,
+        Keycode3dMode => Key::TV3DMode,
+        Contacts => Key::LaunchContacts,
+        Calendar => Key::LaunchCalendar,
+        Music => Key::LaunchMusicPlayer,
+        Calculator => Key::LaunchApplication2,
+        ZenkakuHankaku => Key::ZenkakuHankaku,
+        Eisu => Key::Eisu,
+        Muhenkan => Key::NonConvert,
+        Henkan => Key::Convert,
+        KatakanaHiragana => Key::HiraganaKatakana,
+        Yen => Key::Unidentified(native),
+        Ro => Key::Unidentified(native),
+        Kana => Key::KanjiMode,
+        Assist => Key::Unidentified(native),
+        BrightnessDown => Key::BrightnessDown,
+        BrightnessUp => Key::BrightnessUp,
+        MediaAudioTrack => Key::MediaAudioTrack,
+        Sleep => Key::Standby,
+        Wakeup => Key::WakeUp,
+        Pairing => Key::Pairing,
+        MediaTopMenu => Key::MediaTopMenu,
+        Keycode11 => Key::Unidentified(native),
+        Keycode12 => Key::Unidentified(native),
+        LastChannel => Key::MediaLast,
+        TvDataService => Key::TVDataService,
+        VoiceAssist => Key::VoiceDial,
+        TvRadioService => Key::TVRadioService,
+        TvTeletext => Key::Teletext,
+        TvNumberEntry => Key::TVNumberEntry,
+        TvTerrestrialAnalog => Key::TVTerrestrialAnalog,
+        TvTerrestrialDigital => Key::TVTerrestrialDigital,
+        TvSatellite => Key::TVSatellite,
+        TvSatelliteBs => Key::TVSatelliteBS,
+        TvSatelliteCs => Key::TVSatelliteCS,
+        TvSatelliteService => Key::TVSatelliteToggle,
+        TvNetwork => Key::TVNetwork,
+        TvAntennaCable => Key::TVAntennaCable,
+        TvInputHdmi1 => Key::TVInputHDMI1,
+        TvInputHdmi2 => Key::TVInputHDMI2,
+        TvInputHdmi3 => Key::TVInputHDMI3,
+        TvInputHdmi4 => Key::TVInputHDMI4,
+        TvInputComposite1 => Key::TVInputComposite1,
+        TvInputComposite2 => Key::TVInputComposite2,
+        TvInputComponent1 => Key::TVInputComponent1,
+        TvInputComponent2 => Key::TVInputComponent2,
+        TvInputVga1 => Key::TVInputVGA1,
+        TvAudioDescription => Key::TVAudioDescription,
+        TvAudioDescriptionMixUp => Key::TVAudioDescriptionMixUp,
+        TvAudioDescriptionMixDown => Key::TVAudioDescriptionMixDown,
+        TvZoomMode => Key::ZoomToggle,
+        TvContentsMenu => Key::TVContentsMenu,
+        TvMediaContextMenu => Key::TVMediaContext,
+        TvTimerProgramming => Key::TVTimer,
+        Help => Key::Help,
+        NavigatePrevious => Key::NavigatePrevious,
+        NavigateNext => Key::NavigateNext,
+        NavigateIn => Key::NavigateIn,
+        NavigateOut => Key::NavigateOut,
+        StemPrimary => Key::Unidentified(native),
+        Stem1 => Key::Unidentified(native),
+        Stem2 => Key::Unidentified(native),
+        Stem3 => Key::Unidentified(native),
+        DpadUpLeft => Key::Unidentified(native),
+        DpadDownLeft => Key::Unidentified(native),
+        DpadUpRight => Key::Unidentified(native),
+        DpadDownRight => Key::Unidentified(native),
+        MediaSkipForward => Key::MediaSkipForward,
+        MediaSkipBackward => Key::MediaSkipBackward,
+        MediaStepForward => Key::MediaStepForward,
+        MediaStepBackward => Key::MediaStepBackward,
+        SoftSleep => Key::Unidentified(native),
+        Cut => Key::Cut,
+        Copy => Key::Copy,
+        Paste => Key::Paste,
+        SystemNavigationUp => Key::Unidentified(native),
+        SystemNavigationDown => Key::Unidentified(native),
+        SystemNavigationLeft => Key::Unidentified(native),
+        SystemNavigationRight => Key::Unidentified(native),
+        AllApps => Key::Unidentified(native),
+        Refresh => Key::BrowserRefresh,
+        ThumbsUp => Key::Unidentified(native),
+        ThumbsDown => Key::Unidentified(native),
+        ProfileSwitch => Key::Unidentified(native),
     }
 }
 

src/platform_impl/ios/app_state.rs

@@ -6,7 +6,6 @@ use std::{
     mem,
     os::raw::c_void,
     ptr,
-    sync::{Arc, Mutex},
     time::Instant,
 };
 
@@ -16,21 +15,22 @@ use core_foundation::runloop::{
     kCFRunLoopCommonModes, CFRunLoopAddTimer, CFRunLoopGetMain, CFRunLoopRef, CFRunLoopTimerCreate,
     CFRunLoopTimerInvalidate, CFRunLoopTimerRef, CFRunLoopTimerSetNextFireDate,
 };
-use icrate::Foundation::{
-    CGRect, CGSize, MainThreadMarker, NSInteger, NSOperatingSystemVersion, NSProcessInfo,
-};
-use objc2::rc::Id;
-use objc2::runtime::AnyObject;
+use objc2::foundation::{CGRect, CGSize, NSInteger, NSProcessInfo};
+use objc2::rc::{Id, Shared};
+use objc2::runtime::Object;
 use objc2::{msg_send, sel};
 use once_cell::sync::Lazy;
 
-use super::event_loop::{EventHandler, Never};
 use super::uikit::UIView;
 use super::view::WinitUIWindow;
 use crate::{
-    dpi::PhysicalSize,
-    event::{Event, InnerSizeWriter, StartCause, WindowEvent},
+    dpi::LogicalSize,
+    event::{Event, StartCause, WindowEvent},
     event_loop::ControlFlow,
+    platform_impl::platform::{
+        event_loop::{EventHandler, EventProxy, EventWrapper, Never},
+        ffi::NSOperatingSystemVersion,
+    },
     window::WindowId as RootWindowId,
 };
 
@@ -46,19 +46,6 @@ macro_rules! bug_assert {
     };
 }
 
-#[derive(Debug)]
-pub enum EventWrapper {
-    StaticEvent(Event<Never>),
-    ScaleFactorChanged(ScaleFactorChanged),
-}
-
-#[derive(Debug)]
-pub struct ScaleFactorChanged {
-    pub(super) window: Id<WinitUIWindow>,
-    pub(super) suggested_size: PhysicalSize<u32>,
-    pub(super) scale_factor: f64,
-}
-
 enum UserCallbackTransitionResult<'a> {
     Success {
         event_handler: Box<dyn EventHandler>,
@@ -70,15 +57,9 @@ enum UserCallbackTransitionResult<'a> {
     },
 }
 
-impl Event<Never> {
+impl Event<'static, Never> {
     fn is_redraw(&self) -> bool {
-        matches!(
-            self,
-            Event::WindowEvent {
-                event: WindowEvent::RedrawRequested,
-                ..
-            }
-        )
+        matches!(self, Event::RedrawRequested(_))
     }
 }
 
@@ -87,25 +68,25 @@ impl Event<Never> {
 #[must_use = "dropping `AppStateImpl` without inspecting it is probably a bug"]
 enum AppStateImpl {
     NotLaunched {
-        queued_windows: Vec<Id<WinitUIWindow>>,
+        queued_windows: Vec<Id<WinitUIWindow, Shared>>,
         queued_events: Vec<EventWrapper>,
-        queued_gpu_redraws: HashSet<Id<WinitUIWindow>>,
+        queued_gpu_redraws: HashSet<Id<WinitUIWindow, Shared>>,
     },
     Launching {
-        queued_windows: Vec<Id<WinitUIWindow>>,
+        queued_windows: Vec<Id<WinitUIWindow, Shared>>,
         queued_events: Vec<EventWrapper>,
         queued_event_handler: Box<dyn EventHandler>,
-        queued_gpu_redraws: HashSet<Id<WinitUIWindow>>,
+        queued_gpu_redraws: HashSet<Id<WinitUIWindow, Shared>>,
     },
     ProcessingEvents {
         event_handler: Box<dyn EventHandler>,
-        queued_gpu_redraws: HashSet<Id<WinitUIWindow>>,
+        queued_gpu_redraws: HashSet<Id<WinitUIWindow, Shared>>,
         active_control_flow: ControlFlow,
     },
     // special state to deal with reentrancy and prevent mutable aliasing.
     InUserCallback {
         queued_events: Vec<EventWrapper>,
-        queued_gpu_redraws: HashSet<Id<WinitUIWindow>>,
+        queued_gpu_redraws: HashSet<Id<WinitUIWindow, Shared>>,
     },
     ProcessingRedraws {
         event_handler: Box<dyn EventHandler>,
@@ -121,7 +102,7 @@ enum AppStateImpl {
     Terminated,
 }
 
-pub(crate) struct AppState {
+struct AppState {
     // This should never be `None`, except for briefly during a state transition.
     app_state: Option<AppStateImpl>,
     control_flow: ControlFlow,
@@ -129,18 +110,24 @@ pub(crate) struct AppState {
 }
 
 impl AppState {
-    pub(crate) fn get_mut(_mtm: MainThreadMarker) -> RefMut<'static, AppState> {
+    // requires main thread
+    unsafe fn get_mut() -> RefMut<'static, AppState> {
         // basically everything in UIKit requires the main thread, so it's pointless to use the
         // std::sync APIs.
         // must be mut because plain `static` requires `Sync`
         static mut APP_STATE: RefCell<Option<AppState>> = RefCell::new(None);
 
-        let mut guard = unsafe { APP_STATE.borrow_mut() };
+        if cfg!(debug_assertions) {
+            assert_main_thread!(
+                "bug in winit: `AppState::get_mut()` can only be called on the main thread"
+            );
+        }
+        let mut guard = APP_STATE.borrow_mut();
         if guard.is_none() {
             #[inline(never)]
             #[cold]
-            fn init_guard(guard: &mut RefMut<'static, Option<AppState>>) {
-                let waker = EventLoopWaker::new(unsafe { CFRunLoopGetMain() });
+            unsafe fn init_guard(guard: &mut RefMut<'static, Option<AppState>>) {
+                let waker = EventLoopWaker::new(CFRunLoopGetMain());
                 **guard = Some(AppState {
                     app_state: Some(AppStateImpl::NotLaunched {
                         queued_windows: Vec::new(),
@@ -151,7 +138,7 @@ impl AppState {
                     waker,
                 });
             }
-            init_guard(&mut guard);
+            init_guard(&mut guard)
         }
         RefMut::map(guard, |state| state.as_mut().unwrap())
     }
@@ -217,7 +204,9 @@ impl AppState {
         });
     }
 
-    fn did_finish_launching_transition(&mut self) -> (Vec<Id<WinitUIWindow>>, Vec<EventWrapper>) {
+    fn did_finish_launching_transition(
+        &mut self,
+    ) -> (Vec<Id<WinitUIWindow, Shared>>, Vec<EventWrapper>) {
         let (windows, events, event_handler, queued_gpu_redraws) = match self.take_state() {
             AppStateImpl::Launching {
                 queued_windows,
@@ -234,7 +223,7 @@ impl AppState {
         };
         self.set_state(AppStateImpl::ProcessingEvents {
             event_handler,
-            active_control_flow: self.control_flow,
+            active_control_flow: ControlFlow::Poll,
             queued_gpu_redraws,
         });
         (windows, events)
@@ -290,6 +279,7 @@ impl AppState {
                 };
                 (waiting_event_handler, event)
             }
+            (ControlFlow::ExitWithCode(_), _) => bug!("unexpected `ControlFlow` `Exit`"),
             s => bug!("`EventHandler` unexpectedly woke up {:?}", s),
         };
 
@@ -373,7 +363,7 @@ impl AppState {
         }
     }
 
-    fn main_events_cleared_transition(&mut self) -> HashSet<Id<WinitUIWindow>> {
+    fn main_events_cleared_transition(&mut self) -> HashSet<Id<WinitUIWindow, Shared>> {
         let (event_handler, queued_gpu_redraws, active_control_flow) = match self.take_state() {
             AppStateImpl::ProcessingEvents {
                 event_handler,
@@ -403,6 +393,9 @@ impl AppState {
 
         let new = self.control_flow;
         match (old, new) {
+            (ControlFlow::Poll, ControlFlow::Poll) => self.set_state(AppStateImpl::PollFinished {
+                waiting_event_handler,
+            }),
             (ControlFlow::Wait, ControlFlow::Wait) => {
                 let start = Instant::now();
                 self.set_state(AppStateImpl::Waiting {
@@ -435,34 +428,36 @@ impl AppState {
                 });
                 self.waker.start_at(new_instant)
             }
-            // Unlike on macOS, handle Poll to Poll transition here to call the waker
             (_, ControlFlow::Poll) => {
                 self.set_state(AppStateImpl::PollFinished {
                     waiting_event_handler,
                 });
                 self.waker.start()
             }
+            (_, ControlFlow::ExitWithCode(_)) => {
+                // https://developer.apple.com/library/archive/qa/qa1561/_index.html
+                // it is not possible to quit an iOS app gracefully and programatically
+                warn!("`ControlFlow::Exit` ignored on iOS");
+                self.control_flow = old
+            }
         }
     }
 
     fn terminated_transition(&mut self) -> Box<dyn EventHandler> {
         match self.replace_state(AppStateImpl::Terminated) {
             AppStateImpl::ProcessingEvents { event_handler, .. } => event_handler,
-            s => bug!("`LoopExiting` happened while not processing events {:?}", s),
+            s => bug!(
+                "`LoopDestroyed` happened while not processing events {:?}",
+                s
+            ),
         }
     }
-
-    pub(crate) fn set_control_flow(&mut self, control_flow: ControlFlow) {
-        self.control_flow = control_flow;
-    }
-
-    pub(crate) fn control_flow(&self) -> ControlFlow {
-        self.control_flow
-    }
 }
 
-pub(crate) fn set_key_window(mtm: MainThreadMarker, window: &Id<WinitUIWindow>) {
-    let mut this = AppState::get_mut(mtm);
+// requires main thread and window is a UIWindow
+// retains window
+pub(crate) unsafe fn set_key_window(window: &Id<WinitUIWindow, Shared>) {
+    let mut this = AppState::get_mut();
     match this.state_mut() {
         &mut AppStateImpl::NotLaunched {
             ref mut queued_windows,
@@ -482,8 +477,10 @@ pub(crate) fn set_key_window(mtm: MainThreadMarker, window: &Id<WinitUIWindow>)
     window.makeKeyAndVisible();
 }
 
-pub(crate) fn queue_gl_or_metal_redraw(mtm: MainThreadMarker, window: Id<WinitUIWindow>) {
-    let mut this = AppState::get_mut(mtm);
+// requires main thread and window is a UIWindow
+// retains window
+pub(crate) unsafe fn queue_gl_or_metal_redraw(window: Id<WinitUIWindow, Shared>) {
+    let mut this = AppState::get_mut();
     match this.state_mut() {
         &mut AppStateImpl::NotLaunched {
             ref mut queued_gpu_redraws,
@@ -512,17 +509,24 @@ pub(crate) fn queue_gl_or_metal_redraw(mtm: MainThreadMarker, window: Id<WinitUI
     }
 }
 
-pub fn will_launch(mtm: MainThreadMarker, queued_event_handler: Box<dyn EventHandler>) {
-    AppState::get_mut(mtm).will_launch_transition(queued_event_handler)
+// requires main thread
+pub unsafe fn will_launch(queued_event_handler: Box<dyn EventHandler>) {
+    AppState::get_mut().will_launch_transition(queued_event_handler)
 }
 
-pub fn did_finish_launching(mtm: MainThreadMarker) {
-    let mut this = AppState::get_mut(mtm);
+// requires main thread
+pub unsafe fn did_finish_launching() {
+    let mut this = AppState::get_mut();
     let windows = match this.state_mut() {
         AppStateImpl::Launching { queued_windows, .. } => mem::take(queued_windows),
         s => bug!("unexpected state {:?}", s),
     };
 
+    // start waking up the event loop now!
+    bug_assert!(
+        this.control_flow == ControlFlow::Poll,
+        "unexpectedly not setup to `Poll` on launch!"
+    );
     this.waker.start();
 
     // have to drop RefMut because the window setup code below can trigger new events
@@ -540,7 +544,7 @@ pub fn did_finish_launching(mtm: MainThreadMarker) {
         // completed. This may result in incorrect visual appearance.
         // ```
         let screen = window.screen();
-        let _: () = unsafe { msg_send![&window, setScreen: ptr::null::<AnyObject>()] };
+        let _: () = msg_send![&window, setScreen: ptr::null::<Object>()];
         window.setScreen(&screen);
 
         let controller = window.rootViewController();
@@ -550,13 +554,13 @@ pub fn did_finish_launching(mtm: MainThreadMarker) {
         window.makeKeyAndVisible();
     }
 
-    let (windows, events) = AppState::get_mut(mtm).did_finish_launching_transition();
+    let (windows, events) = AppState::get_mut().did_finish_launching_transition();
 
     let events = std::iter::once(EventWrapper::StaticEvent(Event::NewEvents(
         StartCause::Init,
     )))
     .chain(events);
-    handle_nonuser_events(mtm, events);
+    handle_nonuser_events(events);
 
     // the above window dance hack, could possibly trigger new windows to be created.
     // we can just set those windows up normally, as they were created after didFinishLaunching
@@ -565,27 +569,27 @@ pub fn did_finish_launching(mtm: MainThreadMarker) {
     }
 }
 
+// requires main thread
 // AppState::did_finish_launching handles the special transition `Init`
-pub fn handle_wakeup_transition(mtm: MainThreadMarker) {
-    let mut this = AppState::get_mut(mtm);
+pub unsafe fn handle_wakeup_transition() {
+    let mut this = AppState::get_mut();
     let wakeup_event = match this.wakeup_transition() {
         None => return,
         Some(wakeup_event) => wakeup_event,
     };
     drop(this);
 
-    handle_nonuser_event(mtm, wakeup_event)
+    handle_nonuser_event(wakeup_event)
 }
 
-pub(crate) fn handle_nonuser_event(mtm: MainThreadMarker, event: EventWrapper) {
-    handle_nonuser_events(mtm, std::iter::once(event))
+// requires main thread
+pub(crate) unsafe fn handle_nonuser_event(event: EventWrapper) {
+    handle_nonuser_events(std::iter::once(event))
 }
 
-pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
-    mtm: MainThreadMarker,
-    events: I,
-) {
-    let mut this = AppState::get_mut(mtm);
+// requires main thread
+pub(crate) unsafe fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(events: I) {
+    let mut this = AppState::get_mut();
     let (mut event_handler, active_control_flow, processing_redraws) =
         match this.try_user_callback_transition() {
             UserCallbackTransitionResult::ReentrancyPrevented { queued_events } => {
@@ -598,6 +602,7 @@ pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
                 processing_redraws,
             } => (event_handler, active_control_flow, processing_redraws),
         };
+    let mut control_flow = this.control_flow;
     drop(this);
 
     for wrapper in events {
@@ -611,16 +616,16 @@ pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
                         event
                     );
                 }
-                event_handler.handle_nonuser_event(event)
+                event_handler.handle_nonuser_event(event, &mut control_flow)
             }
-            EventWrapper::ScaleFactorChanged(event) => {
-                handle_hidpi_proxy(&mut event_handler, event)
+            EventWrapper::EventProxy(proxy) => {
+                handle_event_proxy(&mut event_handler, control_flow, proxy)
             }
         }
     }
 
     loop {
-        let mut this = AppState::get_mut(mtm);
+        let mut this = AppState::get_mut();
         let queued_events = match this.state_mut() {
             &mut AppStateImpl::InUserCallback {
                 ref mut queued_events,
@@ -652,6 +657,7 @@ pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
                     active_control_flow,
                 }
             });
+            this.control_flow = control_flow;
             break;
         }
         drop(this);
@@ -667,18 +673,20 @@ pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
                             event
                         );
                     }
-                    event_handler.handle_nonuser_event(event)
+                    event_handler.handle_nonuser_event(event, &mut control_flow)
                 }
-                EventWrapper::ScaleFactorChanged(event) => {
-                    handle_hidpi_proxy(&mut event_handler, event)
+                EventWrapper::EventProxy(proxy) => {
+                    handle_event_proxy(&mut event_handler, control_flow, proxy)
                 }
             }
         }
     }
 }
 
-fn handle_user_events(mtm: MainThreadMarker) {
-    let mut this = AppState::get_mut(mtm);
+// requires main thread
+unsafe fn handle_user_events() {
+    let mut this = AppState::get_mut();
+    let mut control_flow = this.control_flow;
     let (mut event_handler, active_control_flow, processing_redraws) =
         match this.try_user_callback_transition() {
             UserCallbackTransitionResult::ReentrancyPrevented { .. } => {
@@ -695,10 +703,10 @@ fn handle_user_events(mtm: MainThreadMarker) {
     }
     drop(this);
 
-    event_handler.handle_user_events();
+    event_handler.handle_user_events(&mut control_flow);
 
     loop {
-        let mut this = AppState::get_mut(mtm);
+        let mut this = AppState::get_mut();
         let queued_events = match this.state_mut() {
             &mut AppStateImpl::InUserCallback {
                 ref mut queued_events,
@@ -719,24 +727,28 @@ fn handle_user_events(mtm: MainThreadMarker) {
                 queued_gpu_redraws,
                 active_control_flow,
             });
+            this.control_flow = control_flow;
             break;
         }
         drop(this);
 
         for wrapper in queued_events {
             match wrapper {
-                EventWrapper::StaticEvent(event) => event_handler.handle_nonuser_event(event),
-                EventWrapper::ScaleFactorChanged(event) => {
-                    handle_hidpi_proxy(&mut event_handler, event)
+                EventWrapper::StaticEvent(event) => {
+                    event_handler.handle_nonuser_event(event, &mut control_flow)
+                }
+                EventWrapper::EventProxy(proxy) => {
+                    handle_event_proxy(&mut event_handler, control_flow, proxy)
                 }
             }
         }
-        event_handler.handle_user_events();
+        event_handler.handle_user_events(&mut control_flow);
     }
 }
 
-pub fn handle_main_events_cleared(mtm: MainThreadMarker) {
-    let mut this = AppState::get_mut(mtm);
+// requires main thread
+pub unsafe fn handle_main_events_cleared() {
+    let mut this = AppState::get_mut();
     if !this.has_launched() {
         return;
     }
@@ -746,62 +758,84 @@ pub fn handle_main_events_cleared(mtm: MainThreadMarker) {
     };
     drop(this);
 
-    handle_user_events(mtm);
+    // User events are always sent out at the end of the "MainEventLoop"
+    handle_user_events();
+    handle_nonuser_event(EventWrapper::StaticEvent(Event::MainEventsCleared));
 
-    let mut this = AppState::get_mut(mtm);
-    let redraw_events: Vec<EventWrapper> = this
+    let mut this = AppState::get_mut();
+    let mut redraw_events: Vec<EventWrapper> = this
         .main_events_cleared_transition()
         .into_iter()
-        .map(|window| {
-            EventWrapper::StaticEvent(Event::WindowEvent {
-                window_id: RootWindowId(window.id()),
-                event: WindowEvent::RedrawRequested,
-            })
-        })
+        .map(|window| EventWrapper::StaticEvent(Event::RedrawRequested(RootWindowId(window.id()))))
         .collect();
+
+    redraw_events.push(EventWrapper::StaticEvent(Event::RedrawEventsCleared));
     drop(this);
 
-    handle_nonuser_events(mtm, redraw_events);
-    handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::AboutToWait));
+    handle_nonuser_events(redraw_events);
 }
 
-pub fn handle_events_cleared(mtm: MainThreadMarker) {
-    AppState::get_mut(mtm).events_cleared_transition();
+// requires main thread
+pub unsafe fn handle_events_cleared() {
+    AppState::get_mut().events_cleared_transition();
 }
 
-pub fn terminated(mtm: MainThreadMarker) {
-    let mut this = AppState::get_mut(mtm);
+// requires main thread
+pub unsafe fn terminated() {
+    let mut this = AppState::get_mut();
     let mut event_handler = this.terminated_transition();
+    let mut control_flow = this.control_flow;
     drop(this);
 
-    event_handler.handle_nonuser_event(Event::LoopExiting)
+    event_handler.handle_nonuser_event(Event::LoopDestroyed, &mut control_flow)
 }
 
-fn handle_hidpi_proxy(event_handler: &mut Box<dyn EventHandler>, event: ScaleFactorChanged) {
-    let ScaleFactorChanged {
-        suggested_size,
-        scale_factor,
-        window,
-    } = event;
-    let new_inner_size = Arc::new(Mutex::new(suggested_size));
+fn handle_event_proxy(
+    event_handler: &mut Box<dyn EventHandler>,
+    control_flow: ControlFlow,
+    proxy: EventProxy,
+) {
+    match proxy {
+        EventProxy::DpiChangedProxy {
+            suggested_size,
+            scale_factor,
+            window,
+        } => handle_hidpi_proxy(
+            event_handler,
+            control_flow,
+            suggested_size,
+            scale_factor,
+            window,
+        ),
+    }
+}
+
+fn handle_hidpi_proxy(
+    event_handler: &mut Box<dyn EventHandler>,
+    mut control_flow: ControlFlow,
+    suggested_size: LogicalSize<f64>,
+    scale_factor: f64,
+    window: Id<WinitUIWindow, Shared>,
+) {
+    let mut size = suggested_size.to_physical(scale_factor);
+    let new_inner_size = &mut size;
     let event = Event::WindowEvent {
         window_id: RootWindowId(window.id()),
         event: WindowEvent::ScaleFactorChanged {
             scale_factor,
-            inner_size_writer: InnerSizeWriter::new(Arc::downgrade(&new_inner_size)),
+            new_inner_size,
         },
     };
-    event_handler.handle_nonuser_event(event);
+    event_handler.handle_nonuser_event(event, &mut control_flow);
     let (view, screen_frame) = get_view_and_screen_frame(&window);
-    let physical_size = *new_inner_size.lock().unwrap();
-    drop(new_inner_size);
+    let physical_size = *new_inner_size;
     let logical_size = physical_size.to_logical(scale_factor);
     let size = CGSize::new(logical_size.width, logical_size.height);
     let new_frame: CGRect = CGRect::new(screen_frame.origin, size);
     view.setFrame(new_frame);
 }
 
-fn get_view_and_screen_frame(window: &WinitUIWindow) -> (Id<UIView>, CGRect) {
+fn get_view_and_screen_frame(window: &WinitUIWindow) -> (Id<UIView, Shared>, CGRect) {
     let view_controller = window.rootViewController().unwrap();
     let view = view_controller.view().unwrap();
     let bounds = window.bounds();
@@ -890,7 +924,7 @@ macro_rules! os_capabilities {
 
         impl From<NSOperatingSystemVersion> for OSCapabilities {
             fn from(os_version: NSOperatingSystemVersion) -> OSCapabilities {
-                $(let $name = meets_requirements(os_version, $major, $minor);)*
+                $(let $name = os_version.meets_requirements($major, $minor);)*
                 OSCapabilities { $($name,)* os_version, }
             }
         }
@@ -900,7 +934,7 @@ macro_rules! os_capabilities {
             pub fn $error_name(&self, extra_msg: &str) {
                 log::warn!(
                     concat!("`", $objc_call, "` requires iOS {}.{}+. This device is running iOS {}.{}.{}. {}"),
-                    $major, $minor, self.os_version.majorVersion, self.os_version.minorVersion, self.os_version.patchVersion,
+                    $major, $minor, self.os_version.major, self.os_version.minor, self.os_version.patch,
                     extra_msg
                 )
             }
@@ -928,18 +962,16 @@ os_capabilities! {
     force_touch: 9-0,
 }
 
-fn meets_requirements(
-    version: NSOperatingSystemVersion,
-    required_major: NSInteger,
-    required_minor: NSInteger,
-) -> bool {
-    (version.majorVersion, version.minorVersion) >= (required_major, required_minor)
+impl NSOperatingSystemVersion {
+    fn meets_requirements(&self, required_major: NSInteger, required_minor: NSInteger) -> bool {
+        (self.major, self.minor) >= (required_major, required_minor)
+    }
 }
 
 pub fn os_capabilities() -> OSCapabilities {
     static OS_CAPABILITIES: Lazy<OSCapabilities> = Lazy::new(|| {
         let version: NSOperatingSystemVersion = unsafe {
-            let process_info = NSProcessInfo::processInfo();
+            let process_info = NSProcessInfo::process_info();
             let atleast_ios_8: bool = msg_send![
                 &process_info,
                 respondsToSelector: sel!(operatingSystemVersion)
@@ -952,7 +984,7 @@ pub fn os_capabilities() -> OSCapabilities {
             //
             // The minimum required iOS version is likely to grow in the future.
             assert!(atleast_ios_8, "`winit` requires iOS version 8 or greater");
-            process_info.operatingSystemVersion()
+            msg_send![&process_info, operatingSystemVersion]
         };
         version.into()
     });

src/platform_impl/ios/event_loop.rs

@@ -14,82 +14,60 @@ use core_foundation::runloop::{
     CFRunLoopObserverCreate, CFRunLoopObserverRef, CFRunLoopSourceContext, CFRunLoopSourceCreate,
     CFRunLoopSourceInvalidate, CFRunLoopSourceRef, CFRunLoopSourceSignal, CFRunLoopWakeUp,
 };
-use icrate::Foundation::{MainThreadMarker, NSString};
+use objc2::foundation::{MainThreadMarker, NSString};
+use objc2::rc::{Id, Shared};
 use objc2::ClassType;
+use raw_window_handle::{RawDisplayHandle, UiKitDisplayHandle};
 
+use super::uikit::{UIApplication, UIApplicationMain, UIDevice, UIScreen};
+use super::view::WinitUIWindow;
+use super::{app_state, monitor, view, MonitorHandle};
 use crate::{
-    error::EventLoopError,
+    dpi::LogicalSize,
     event::Event,
     event_loop::{
-        ControlFlow, DeviceEvents, EventLoopClosed,
-        EventLoopWindowTarget as RootEventLoopWindowTarget,
+        ControlFlow, EventLoopClosed, EventLoopWindowTarget as RootEventLoopWindowTarget,
     },
     platform::ios::Idiom,
 };
 
-use super::{app_state, monitor, view, MonitorHandle};
-use super::{
-    app_state::AppState,
-    uikit::{UIApplication, UIApplicationMain, UIDevice, UIScreen},
-};
-
 #[derive(Debug)]
+pub(crate) enum EventWrapper {
+    StaticEvent(Event<'static, Never>),
+    EventProxy(EventProxy),
+}
+
+#[derive(Debug, PartialEq)]
+pub(crate) enum EventProxy {
+    DpiChangedProxy {
+        window: Id<WinitUIWindow, Shared>,
+        suggested_size: LogicalSize<f64>,
+        scale_factor: f64,
+    },
+}
+
 pub struct EventLoopWindowTarget<T: 'static> {
-    pub(super) mtm: MainThreadMarker,
-    p: PhantomData<T>,
+    receiver: Receiver<T>,
+    sender_to_clone: Sender<T>,
 }
 
 impl<T: 'static> EventLoopWindowTarget<T> {
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
-        monitor::uiscreens(self.mtm)
+        monitor::uiscreens(MainThreadMarker::new().unwrap())
     }
 
     pub fn primary_monitor(&self) -> Option<MonitorHandle> {
-        Some(MonitorHandle::new(UIScreen::main(self.mtm)))
+        Some(MonitorHandle::new(UIScreen::main(
+            MainThreadMarker::new().unwrap(),
+        )))
     }
 
-    #[inline]
-    pub fn listen_device_events(&self, _allowed: DeviceEvents) {}
-
-    #[cfg(feature = "rwh_05")]
-    #[inline]
-    pub fn raw_display_handle_rwh_05(&self) -> rwh_05::RawDisplayHandle {
-        rwh_05::RawDisplayHandle::UiKit(rwh_05::UiKitDisplayHandle::empty())
-    }
-
-    #[cfg(feature = "rwh_06")]
-    #[inline]
-    pub fn raw_display_handle_rwh_06(
-        &self,
-    ) -> Result<rwh_06::RawDisplayHandle, rwh_06::HandleError> {
-        Ok(rwh_06::RawDisplayHandle::UiKit(
-            rwh_06::UiKitDisplayHandle::new(),
-        ))
-    }
-
-    pub(crate) fn set_control_flow(&self, control_flow: ControlFlow) {
-        AppState::get_mut(self.mtm).set_control_flow(control_flow)
-    }
-
-    pub(crate) fn control_flow(&self) -> ControlFlow {
-        AppState::get_mut(self.mtm).control_flow()
-    }
-
-    pub(crate) fn exit(&self) {
-        // https://developer.apple.com/library/archive/qa/qa1561/_index.html
-        // it is not possible to quit an iOS app gracefully and programatically
-        warn!("`ControlFlow::Exit` ignored on iOS");
-    }
-
-    pub(crate) fn exiting(&self) -> bool {
-        false
+    pub fn raw_display_handle(&self) -> RawDisplayHandle {
+        RawDisplayHandle::UiKit(UiKitDisplayHandle::empty())
     }
 }
 
 pub struct EventLoop<T: 'static> {
-    mtm: MainThreadMarker,
-    sender: Sender<T>,
-    receiver: Receiver<T>,
     window_target: RootEventLoopWindowTarget<T>,
 }
 
@@ -97,11 +75,8 @@ pub struct EventLoop<T: 'static> {
 pub(crate) struct PlatformSpecificEventLoopAttributes {}
 
 impl<T: 'static> EventLoop<T> {
-    pub(crate) fn new(
-        _: &PlatformSpecificEventLoopAttributes,
-    ) -> Result<EventLoop<T>, EventLoopError> {
-        let mtm = MainThreadMarker::new()
-            .expect("On iOS, `EventLoop` must be created on the main thread");
+    pub(crate) fn new(_: &PlatformSpecificEventLoopAttributes) -> EventLoop<T> {
+        assert_main_thread!("`EventLoop` can only be created on the main thread on iOS");
 
         static mut SINGLETON_INIT: bool = false;
         unsafe {
@@ -113,50 +88,38 @@ impl<T: 'static> EventLoop<T> {
             SINGLETON_INIT = true;
         }
 
-        let (sender, receiver) = mpsc::channel();
+        let (sender_to_clone, receiver) = mpsc::channel();
 
         // this line sets up the main run loop before `UIApplicationMain`
         setup_control_flow_observers();
 
-        Ok(EventLoop {
-            mtm,
-            sender,
-            receiver,
+        EventLoop {
             window_target: RootEventLoopWindowTarget {
                 p: EventLoopWindowTarget {
-                    mtm,
-                    p: PhantomData,
+                    receiver,
+                    sender_to_clone,
                 },
                 _marker: PhantomData,
             },
-        })
+        }
     }
 
     pub fn run<F>(self, event_handler: F) -> !
     where
-        F: FnMut(Event<T>, &RootEventLoopWindowTarget<T>),
+        F: 'static + FnMut(Event<'_, T>, &RootEventLoopWindowTarget<T>, &mut ControlFlow),
     {
         unsafe {
-            let application = UIApplication::shared(self.mtm);
+            let application = UIApplication::shared(MainThreadMarker::new().unwrap());
             assert!(
                 application.is_none(),
                 "\
                 `EventLoop` cannot be `run` after a call to `UIApplicationMain` on iOS\n\
                  Note: `EventLoop::run` calls `UIApplicationMain` on iOS",
             );
-
-            let event_handler = std::mem::transmute::<
-                Box<dyn FnMut(Event<T>, &RootEventLoopWindowTarget<T>)>,
-                Box<EventHandlerCallback<T>>,
-            >(Box::new(event_handler));
-
-            let handler = EventLoopHandler {
+            app_state::will_launch(Box::new(EventLoopHandler {
                 f: event_handler,
-                receiver: self.receiver,
                 event_loop: self.window_target,
-            };
-
-            app_state::will_launch(self.mtm, Box::new(handler));
+            }));
 
             // Ensure application delegate is initialized
             view::WinitApplicationDelegate::class();
@@ -172,7 +135,7 @@ impl<T: 'static> EventLoop<T> {
     }
 
     pub fn create_proxy(&self) -> EventLoopProxy<T> {
-        EventLoopProxy::new(self.sender.clone())
+        EventLoopProxy::new(self.window_target.p.sender_to_clone.clone())
     }
 
     pub fn window_target(&self) -> &RootEventLoopWindowTarget<T> {
@@ -183,7 +146,9 @@ impl<T: 'static> EventLoop<T> {
 // EventLoopExtIOS
 impl<T: 'static> EventLoop<T> {
     pub fn idiom(&self) -> Idiom {
-        UIDevice::current(self.mtm).userInterfaceIdiom().into()
+        UIDevice::current(MainThreadMarker::new().unwrap())
+            .userInterfaceIdiom()
+            .into()
     }
 }
 
@@ -261,20 +226,21 @@ fn setup_control_flow_observers() {
             activity: CFRunLoopActivity,
             _: *mut c_void,
         ) {
-            let mtm = MainThreadMarker::new().unwrap();
-            #[allow(non_upper_case_globals)]
-            match activity {
-                kCFRunLoopAfterWaiting => app_state::handle_wakeup_transition(mtm),
-                _ => unreachable!(),
+            unsafe {
+                #[allow(non_upper_case_globals)]
+                match activity {
+                    kCFRunLoopAfterWaiting => app_state::handle_wakeup_transition(),
+                    _ => unreachable!(),
+                }
             }
         }
 
         // Core Animation registers its `CFRunLoopObserver` that performs drawing operations in
         // `CA::Transaction::ensure_implicit` with a priority of `0x1e8480`. We set the main_end
-        // priority to be 0, in order to send AboutToWait before RedrawRequested. This value was
+        // priority to be 0, in order to send MainEventsCleared before RedrawRequested. This value was
         // chosen conservatively to guard against apple using different priorities for their redraw
         // observers in different OS's or on different devices. If it so happens that it's too
-        // conservative, the main symptom would be non-redraw events coming in after `AboutToWait`.
+        // conservative, the main symptom would be non-redraw events coming in after `MainEventsCleared`.
         //
         // The value of `0x1e8480` was determined by inspecting stack traces and the associated
         // registers for every `CFRunLoopAddObserver` call on an iPad Air 2 running iOS 11.4.
@@ -285,12 +251,13 @@ fn setup_control_flow_observers() {
             activity: CFRunLoopActivity,
             _: *mut c_void,
         ) {
-            let mtm = MainThreadMarker::new().unwrap();
-            #[allow(non_upper_case_globals)]
-            match activity {
-                kCFRunLoopBeforeWaiting => app_state::handle_main_events_cleared(mtm),
-                kCFRunLoopExit => unimplemented!(), // not expected to ever happen
-                _ => unreachable!(),
+            unsafe {
+                #[allow(non_upper_case_globals)]
+                match activity {
+                    kCFRunLoopBeforeWaiting => app_state::handle_main_events_cleared(),
+                    kCFRunLoopExit => unimplemented!(), // not expected to ever happen
+                    _ => unreachable!(),
+                }
             }
         }
 
@@ -300,12 +267,13 @@ fn setup_control_flow_observers() {
             activity: CFRunLoopActivity,
             _: *mut c_void,
         ) {
-            let mtm = MainThreadMarker::new().unwrap();
-            #[allow(non_upper_case_globals)]
-            match activity {
-                kCFRunLoopBeforeWaiting => app_state::handle_events_cleared(mtm),
-                kCFRunLoopExit => unimplemented!(), // not expected to ever happen
-                _ => unreachable!(),
+            unsafe {
+                #[allow(non_upper_case_globals)]
+                match activity {
+                    kCFRunLoopBeforeWaiting => app_state::handle_events_cleared(),
+                    kCFRunLoopExit => unimplemented!(), // not expected to ever happen
+                    _ => unreachable!(),
+                }
             }
         }
 
@@ -346,20 +314,17 @@ fn setup_control_flow_observers() {
 #[derive(Debug)]
 pub enum Never {}
 
-type EventHandlerCallback<T> = dyn FnMut(Event<T>, &RootEventLoopWindowTarget<T>) + 'static;
-
 pub trait EventHandler: Debug {
-    fn handle_nonuser_event(&mut self, event: Event<Never>);
-    fn handle_user_events(&mut self);
+    fn handle_nonuser_event(&mut self, event: Event<'_, Never>, control_flow: &mut ControlFlow);
+    fn handle_user_events(&mut self, control_flow: &mut ControlFlow);
 }
 
-struct EventLoopHandler<T: 'static> {
-    f: Box<EventHandlerCallback<T>>,
-    receiver: Receiver<T>,
+struct EventLoopHandler<F, T: 'static> {
+    f: F,
     event_loop: RootEventLoopWindowTarget<T>,
 }
 
-impl<T: 'static> Debug for EventLoopHandler<T> {
+impl<F, T: 'static> Debug for EventLoopHandler<F, T> {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         f.debug_struct("EventLoopHandler")
             .field("event_loop", &self.event_loop)
@@ -367,14 +332,22 @@ impl<T: 'static> Debug for EventLoopHandler<T> {
     }
 }
 
-impl<T: 'static> EventHandler for EventLoopHandler<T> {
-    fn handle_nonuser_event(&mut self, event: Event<Never>) {
-        (self.f)(event.map_nonuser_event().unwrap(), &self.event_loop);
+impl<F, T> EventHandler for EventLoopHandler<F, T>
+where
+    F: 'static + FnMut(Event<'_, T>, &RootEventLoopWindowTarget<T>, &mut ControlFlow),
+    T: 'static,
+{
+    fn handle_nonuser_event(&mut self, event: Event<'_, Never>, control_flow: &mut ControlFlow) {
+        (self.f)(
+            event.map_nonuser_event().unwrap(),
+            &self.event_loop,
+            control_flow,
+        );
     }
 
-    fn handle_user_events(&mut self) {
-        for event in self.receiver.try_iter() {
-            (self.f)(Event::UserEvent(event), &self.event_loop);
+    fn handle_user_events(&mut self, control_flow: &mut ControlFlow) {
+        for event in self.event_loop.p.receiver.try_iter() {
+            (self.f)(Event::UserEvent(event), &self.event_loop, control_flow);
         }
     }
 }

src/platform_impl/ios/ffi.rs

@@ -2,11 +2,30 @@
 
 use std::convert::TryInto;
 
-use icrate::Foundation::{NSInteger, NSUInteger};
 use objc2::encode::{Encode, Encoding};
+use objc2::foundation::{NSInteger, NSUInteger};
 
 use crate::platform::ios::{Idiom, ScreenEdge};
 
+#[repr(C)]
+#[derive(Clone, Debug)]
+pub struct NSOperatingSystemVersion {
+    pub major: NSInteger,
+    pub minor: NSInteger,
+    pub patch: NSInteger,
+}
+
+unsafe impl Encode for NSOperatingSystemVersion {
+    const ENCODING: Encoding = Encoding::Struct(
+        "NSOperatingSystemVersion",
+        &[
+            NSInteger::ENCODING,
+            NSInteger::ENCODING,
+            NSInteger::ENCODING,
+        ],
+    );
+}
+
 #[repr(transparent)]
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct UIUserInterfaceIdiom(NSInteger);
@@ -51,10 +70,6 @@ impl From<UIUserInterfaceIdiom> for Idiom {
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct UIRectEdge(NSUInteger);
 
-impl UIRectEdge {
-    pub(crate) const NONE: Self = Self(0);
-}
-
 unsafe impl Encode for UIRectEdge {
     const ENCODING: Encoding = NSUInteger::ENCODING;
 }

src/platform_impl/ios/mod.rs

@@ -48,16 +48,27 @@
 //!
 //!  - applicationDidBecomeActive is Resumed
 //!  - applicationWillResignActive is Suspended
-//!  - applicationWillTerminate is LoopExiting
+//!  - applicationWillTerminate is LoopDestroyed
 //!
-//! Keep in mind that after LoopExiting event is received every attempt to draw with
+//! Keep in mind that after LoopDestroyed event is received every attempt to draw with
 //! opengl will result in segfault.
 //!
-//! Also note that app may not receive the LoopExiting event if suspended; it might be SIGKILL'ed.
+//! Also note that app may not receive the LoopDestroyed event if suspended; it might be SIGKILL'ed.
 
 #![cfg(ios_platform)]
 #![allow(clippy::let_unit_value)]
 
+// TODO: (mtak-) UIKit requires main thread for virtually all function/method calls. This could be
+// worked around in the future by using GCD (grand central dispatch) and/or caching of values like
+// window size/position.
+macro_rules! assert_main_thread {
+    ($($t:tt)*) => {
+        if !::objc2::foundation::is_main_thread() {
+            panic!($($t)*);
+        }
+    };
+}
+
 mod app_state;
 mod event_loop;
 mod ffi;
@@ -78,7 +89,7 @@ pub(crate) use self::{
 
 use self::uikit::UIScreen;
 pub(crate) use crate::icon::NoIcon as PlatformIcon;
-pub(crate) use crate::platform_impl::Fullscreen;
+pub(self) use crate::platform_impl::Fullscreen;
 
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId {

src/platform_impl/ios/monitor.rs

@@ -2,12 +2,12 @@
 
 use std::{
     collections::{BTreeSet, VecDeque},
-    fmt, hash, ptr,
+    fmt,
+    ops::{Deref, DerefMut},
 };
 
-use icrate::Foundation::{MainThreadBound, MainThreadMarker, NSInteger};
-use objc2::mutability::IsRetainable;
-use objc2::rc::Id;
+use objc2::foundation::{MainThreadMarker, NSInteger};
+use objc2::rc::{Id, Shared};
 
 use super::uikit::{UIScreen, UIScreenMode};
 use crate::{
@@ -16,59 +16,32 @@ use crate::{
     platform_impl::platform::app_state,
 };
 
-// Workaround for `MainThreadBound` implementing almost no traits
-#[derive(Debug)]
-struct MainThreadBoundDelegateImpls<T>(MainThreadBound<Id<T>>);
+// TODO(madsmtm): Remove or refactor this
+#[derive(Debug, PartialEq, Eq, Hash, Clone)]
+pub(crate) struct ScreenModeSendSync(pub(crate) Id<UIScreenMode, Shared>);
 
-impl<T: IsRetainable> Clone for MainThreadBoundDelegateImpls<T> {
-    fn clone(&self) -> Self {
-        Self(
-            self.0
-                .get_on_main(|inner, mtm| MainThreadBound::new(Id::clone(inner), mtm)),
-        )
-    }
-}
-
-impl<T: IsRetainable> hash::Hash for MainThreadBoundDelegateImpls<T> {
-    fn hash<H: hash::Hasher>(&self, state: &mut H) {
-        // SAFETY: Marker only used to get the pointer
-        let mtm = unsafe { MainThreadMarker::new_unchecked() };
-        Id::as_ptr(self.0.get(mtm)).hash(state);
-    }
-}
-
-impl<T: IsRetainable> PartialEq for MainThreadBoundDelegateImpls<T> {
-    fn eq(&self, other: &Self) -> bool {
-        // SAFETY: Marker only used to get the pointer
-        let mtm = unsafe { MainThreadMarker::new_unchecked() };
-        Id::as_ptr(self.0.get(mtm)) == Id::as_ptr(other.0.get(mtm))
-    }
-}
-
-impl<T: IsRetainable> Eq for MainThreadBoundDelegateImpls<T> {}
+unsafe impl Send for ScreenModeSendSync {}
+unsafe impl Sync for ScreenModeSendSync {}
 
 #[derive(Debug, PartialEq, Eq, Hash, Clone)]
 pub struct VideoMode {
     pub(crate) size: (u32, u32),
     pub(crate) bit_depth: u16,
     pub(crate) refresh_rate_millihertz: u32,
-    screen_mode: MainThreadBoundDelegateImpls<UIScreenMode>,
+    pub(crate) screen_mode: ScreenModeSendSync,
     pub(crate) monitor: MonitorHandle,
 }
 
 impl VideoMode {
-    fn new(
-        uiscreen: Id<UIScreen>,
-        screen_mode: Id<UIScreenMode>,
-        mtm: MainThreadMarker,
-    ) -> VideoMode {
+    fn new(uiscreen: Id<UIScreen, Shared>, screen_mode: Id<UIScreenMode, Shared>) -> VideoMode {
+        assert_main_thread!("`VideoMode` can only be created on the main thread on iOS");
         let refresh_rate_millihertz = refresh_rate_millihertz(&uiscreen);
         let size = screen_mode.size();
         VideoMode {
             size: (size.width as u32, size.height as u32),
             bit_depth: 32,
             refresh_rate_millihertz,
-            screen_mode: MainThreadBoundDelegateImpls(MainThreadBound::new(screen_mode, mtm)),
+            screen_mode: ScreenModeSendSync(screen_mode),
             monitor: MonitorHandle::new(uiscreen),
         }
     }
@@ -88,40 +61,18 @@ impl VideoMode {
     pub fn monitor(&self) -> MonitorHandle {
         self.monitor.clone()
     }
-
-    pub(super) fn screen_mode(&self, mtm: MainThreadMarker) -> &Id<UIScreenMode> {
-        self.screen_mode.0.get(mtm)
-    }
 }
 
+#[derive(Clone, PartialEq, Eq, Hash)]
+pub struct Inner {
+    uiscreen: Id<UIScreen, Shared>,
+}
+
+#[derive(Clone, PartialEq, Eq, Hash)]
 pub struct MonitorHandle {
-    ui_screen: MainThreadBound<Id<UIScreen>>,
+    inner: Inner,
 }
 
-impl Clone for MonitorHandle {
-    fn clone(&self) -> Self {
-        Self {
-            ui_screen: self
-                .ui_screen
-                .get_on_main(|inner, mtm| MainThreadBound::new(inner.clone(), mtm)),
-        }
-    }
-}
-
-impl hash::Hash for MonitorHandle {
-    fn hash<H: hash::Hasher>(&self, state: &mut H) {
-        (self as *const Self).hash(state);
-    }
-}
-
-impl PartialEq for MonitorHandle {
-    fn eq(&self, other: &Self) -> bool {
-        ptr::eq(self, other)
-    }
-}
-
-impl Eq for MonitorHandle {}
-
 impl PartialOrd for MonitorHandle {
     fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
         Some(self.cmp(other))
@@ -135,6 +86,31 @@ impl Ord for MonitorHandle {
     }
 }
 
+impl Deref for MonitorHandle {
+    type Target = Inner;
+
+    fn deref(&self) -> &Inner {
+        assert_main_thread!("`MonitorHandle` methods can only be run on the main thread on iOS");
+        &self.inner
+    }
+}
+
+impl DerefMut for MonitorHandle {
+    fn deref_mut(&mut self) -> &mut Inner {
+        assert_main_thread!("`MonitorHandle` methods can only be run on the main thread on iOS");
+        &mut self.inner
+    }
+}
+
+unsafe impl Send for MonitorHandle {}
+unsafe impl Sync for MonitorHandle {}
+
+impl Drop for MonitorHandle {
+    fn drop(&mut self) {
+        assert_main_thread!("`MonitorHandle` can only be dropped on the main thread on iOS");
+    }
+}
+
 impl fmt::Debug for MonitorHandle {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         // TODO: Do this using the proper fmt API
@@ -159,80 +135,64 @@ impl fmt::Debug for MonitorHandle {
 }
 
 impl MonitorHandle {
-    pub(crate) fn new(ui_screen: Id<UIScreen>) -> Self {
-        // Holding `Id<UIScreen>` implies we're on the main thread.
-        let mtm = MainThreadMarker::new().unwrap();
+    pub(crate) fn new(uiscreen: Id<UIScreen, Shared>) -> Self {
+        assert_main_thread!("`MonitorHandle` can only be created on the main thread on iOS");
         Self {
-            ui_screen: MainThreadBound::new(ui_screen, mtm),
+            inner: Inner { uiscreen },
+        }
+    }
+}
+
+impl Inner {
+    pub fn name(&self) -> Option<String> {
+        let main = UIScreen::main(MainThreadMarker::new().unwrap());
+        if self.uiscreen == main {
+            Some("Primary".to_string())
+        } else if self.uiscreen == main.mirroredScreen() {
+            Some("Mirrored".to_string())
+        } else {
+            UIScreen::screens(MainThreadMarker::new().unwrap())
+                .iter()
+                .position(|rhs| rhs == &*self.uiscreen)
+                .map(|idx| idx.to_string())
         }
     }
 
-    pub fn name(&self) -> Option<String> {
-        self.ui_screen.get_on_main(|ui_screen, mtm| {
-            let main = UIScreen::main(mtm);
-            if *ui_screen == main {
-                Some("Primary".to_string())
-            } else if *ui_screen == main.mirroredScreen() {
-                Some("Mirrored".to_string())
-            } else {
-                UIScreen::screens(mtm)
-                    .iter()
-                    .position(|rhs| rhs == &**ui_screen)
-                    .map(|idx| idx.to_string())
-            }
-        })
-    }
-
     pub fn size(&self) -> PhysicalSize<u32> {
-        let bounds = self
-            .ui_screen
-            .get_on_main(|ui_screen, _| ui_screen.nativeBounds());
+        let bounds = self.uiscreen.nativeBounds();
         PhysicalSize::new(bounds.size.width as u32, bounds.size.height as u32)
     }
 
     pub fn position(&self) -> PhysicalPosition<i32> {
-        let bounds = self
-            .ui_screen
-            .get_on_main(|ui_screen, _| ui_screen.nativeBounds());
+        let bounds = self.uiscreen.nativeBounds();
         (bounds.origin.x as f64, bounds.origin.y as f64).into()
     }
 
     pub fn scale_factor(&self) -> f64 {
-        self.ui_screen
-            .get_on_main(|ui_screen, _| ui_screen.nativeScale()) as f64
+        self.uiscreen.nativeScale() as f64
     }
 
     pub fn refresh_rate_millihertz(&self) -> Option<u32> {
-        Some(
-            self.ui_screen
-                .get_on_main(|ui_screen, _| refresh_rate_millihertz(ui_screen)),
-        )
+        Some(refresh_rate_millihertz(&self.uiscreen))
     }
 
     pub fn video_modes(&self) -> impl Iterator<Item = VideoMode> {
-        self.ui_screen.get_on_main(|ui_screen, mtm| {
-            // Use Ord impl of RootVideoMode
+        // Use Ord impl of RootVideoMode
+        let modes: BTreeSet<_> = self
+            .uiscreen
+            .availableModes()
+            .into_iter()
+            .map(|mode| {
+                let mode: *const UIScreenMode = mode;
+                let mode = unsafe { Id::retain(mode as *mut UIScreenMode).unwrap() };
 
-            let modes: BTreeSet<_> = ui_screen
-                .availableModes()
-                .into_iter()
-                .map(|mode| RootVideoMode {
-                    video_mode: VideoMode::new(ui_screen.clone(), mode, mtm),
-                })
-                .collect();
+                RootVideoMode {
+                    video_mode: VideoMode::new(self.uiscreen.clone(), mode),
+                }
+            })
+            .collect();
 
-            modes.into_iter().map(|mode| mode.video_mode)
-        })
-    }
-
-    pub(crate) fn ui_screen(&self, mtm: MainThreadMarker) -> &Id<UIScreen> {
-        self.ui_screen.get(mtm)
-    }
-
-    pub fn preferred_video_mode(&self) -> VideoMode {
-        self.ui_screen.get_on_main(|ui_screen, mtm| {
-            VideoMode::new(ui_screen.clone(), ui_screen.preferredMode().unwrap(), mtm)
-        })
+        modes.into_iter().map(|mode| mode.video_mode)
     }
 }
 
@@ -260,9 +220,27 @@ fn refresh_rate_millihertz(uiscreen: &UIScreen) -> u32 {
     refresh_rate_millihertz as u32 * 1000
 }
 
+// MonitorHandleExtIOS
+impl Inner {
+    pub(crate) fn ui_screen(&self) -> &Id<UIScreen, Shared> {
+        &self.uiscreen
+    }
+
+    pub fn preferred_video_mode(&self) -> VideoMode {
+        VideoMode::new(
+            self.uiscreen.clone(),
+            self.uiscreen.preferredMode().unwrap(),
+        )
+    }
+}
+
 pub fn uiscreens(mtm: MainThreadMarker) -> VecDeque<MonitorHandle> {
     UIScreen::screens(mtm)
         .into_iter()
-        .map(MonitorHandle::new)
+        .map(|screen| {
+            let screen: *const UIScreen = screen;
+            let screen = unsafe { Id::retain(screen as *mut UIScreen).unwrap() };
+            MonitorHandle::new(screen)
+        })
         .collect()
 }

src/platform_impl/ios/uikit/application.rs

@@ -1,6 +1,6 @@
-use icrate::Foundation::{CGRect, MainThreadMarker, NSArray, NSObject};
-use objc2::rc::Id;
-use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
+use objc2::foundation::{CGRect, MainThreadMarker, NSArray, NSObject};
+use objc2::rc::{Id, Shared};
+use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
 
 use super::{UIResponder, UIWindow};
 
@@ -11,21 +11,20 @@ extern_class!(
     unsafe impl ClassType for UIApplication {
         #[inherits(NSObject)]
         type Super = UIResponder;
-        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIApplication {
-        pub fn shared(_mtm: MainThreadMarker) -> Option<Id<Self>> {
+        pub fn shared(_mtm: MainThreadMarker) -> Option<Id<Self, Shared>> {
             unsafe { msg_send_id![Self::class(), sharedApplication] }
         }
 
-        pub fn windows(&self) -> Id<NSArray<UIWindow>> {
+        pub fn windows(&self) -> Id<NSArray<UIWindow, Shared>, Shared> {
             unsafe { msg_send_id![self, windows] }
         }
 
-        #[method(statusBarFrame)]
+        #[sel(statusBarFrame)]
         pub fn statusBarFrame(&self) -> CGRect;
     }
 );

src/platform_impl/ios/uikit/coordinate_space.rs

@@ -1,5 +1,5 @@
-use icrate::Foundation::NSObject;
-use objc2::{extern_class, mutability, ClassType};
+use objc2::foundation::NSObject;
+use objc2::{extern_class, ClassType};
 
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
@@ -7,6 +7,5 @@ extern_class!(
 
     unsafe impl ClassType for UICoordinateSpace {
         type Super = NSObject;
-        type Mutability = mutability::InteriorMutable;
     }
 );

src/platform_impl/ios/uikit/device.rs

@@ -1,6 +1,6 @@
-use icrate::Foundation::{MainThreadMarker, NSObject};
-use objc2::rc::Id;
-use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
+use objc2::foundation::{MainThreadMarker, NSObject};
+use objc2::rc::{Id, Shared};
+use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
 
 use super::super::ffi::UIUserInterfaceIdiom;
 
@@ -10,17 +10,16 @@ extern_class!(
 
     unsafe impl ClassType for UIDevice {
         type Super = NSObject;
-        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIDevice {
-        pub fn current(_mtm: MainThreadMarker) -> Id<Self> {
+        pub fn current(_mtm: MainThreadMarker) -> Id<Self, Shared> {
             unsafe { msg_send_id![Self::class(), currentDevice] }
         }
 
-        #[method(userInterfaceIdiom)]
+        #[sel(userInterfaceIdiom)]
         pub fn userInterfaceIdiom(&self) -> UIUserInterfaceIdiom;
     }
 );

src/platform_impl/ios/uikit/event.rs

@@ -1,5 +1,5 @@
-use icrate::Foundation::NSObject;
-use objc2::{extern_class, mutability, ClassType};
+use objc2::foundation::NSObject;
+use objc2::{extern_class, ClassType};
 
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
@@ -7,6 +7,5 @@ extern_class!(
 
     unsafe impl ClassType for UIEvent {
         type Super = NSObject;
-        type Mutability = mutability::InteriorMutable;
     }
 );

src/platform_impl/ios/uikit/mod.rs

@@ -1,9 +1,10 @@
+#![deny(unsafe_op_in_unsafe_fn)]
 #![allow(non_snake_case)]
 #![allow(non_upper_case_globals)]
 
 use std::os::raw::{c_char, c_int};
 
-use icrate::Foundation::NSString;
+use objc2::foundation::NSString;
 
 mod application;
 mod coordinate_space;

src/platform_impl/ios/uikit/responder.rs

@@ -1,5 +1,5 @@
-use icrate::Foundation::NSObject;
-use objc2::{extern_class, mutability, ClassType};
+use objc2::foundation::NSObject;
+use objc2::{extern_class, ClassType};
 
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
@@ -7,6 +7,5 @@ extern_class!(
 
     unsafe impl ClassType for UIResponder {
         type Super = NSObject;
-        type Mutability = mutability::InteriorMutable;
     }
 );

src/platform_impl/ios/uikit/screen.rs

@@ -1,7 +1,7 @@
-use icrate::Foundation::{CGFloat, CGRect, MainThreadMarker, NSArray, NSInteger, NSObject};
 use objc2::encode::{Encode, Encoding};
-use objc2::rc::Id;
-use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
+use objc2::foundation::{CGFloat, CGRect, MainThreadMarker, NSArray, NSInteger, NSObject};
+use objc2::rc::{Id, Shared};
+use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
 
 use super::{UICoordinateSpace, UIScreenMode};
 
@@ -11,54 +11,53 @@ extern_class!(
 
     unsafe impl ClassType for UIScreen {
         type Super = NSObject;
-        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIScreen {
-        pub fn main(_mtm: MainThreadMarker) -> Id<Self> {
+        pub fn main(_mtm: MainThreadMarker) -> Id<Self, Shared> {
             unsafe { msg_send_id![Self::class(), mainScreen] }
         }
 
-        pub fn screens(_mtm: MainThreadMarker) -> Id<NSArray<Self>> {
+        pub fn screens(_mtm: MainThreadMarker) -> Id<NSArray<Self, Shared>, Shared> {
             unsafe { msg_send_id![Self::class(), screens] }
         }
 
-        #[method(bounds)]
+        #[sel(bounds)]
         pub fn bounds(&self) -> CGRect;
 
-        #[method(scale)]
+        #[sel(scale)]
         pub fn scale(&self) -> CGFloat;
 
-        #[method(nativeBounds)]
+        #[sel(nativeBounds)]
         pub fn nativeBounds(&self) -> CGRect;
 
-        #[method(nativeScale)]
+        #[sel(nativeScale)]
         pub fn nativeScale(&self) -> CGFloat;
 
-        #[method(maximumFramesPerSecond)]
+        #[sel(maximumFramesPerSecond)]
         pub fn maximumFramesPerSecond(&self) -> NSInteger;
 
-        pub fn mirroredScreen(&self) -> Id<Self> {
+        pub fn mirroredScreen(&self) -> Id<Self, Shared> {
             unsafe { msg_send_id![Self::class(), mirroredScreen] }
         }
 
-        pub fn preferredMode(&self) -> Option<Id<UIScreenMode>> {
+        pub fn preferredMode(&self) -> Option<Id<UIScreenMode, Shared>> {
             unsafe { msg_send_id![self, preferredMode] }
         }
 
-        #[method(setCurrentMode:)]
+        #[sel(setCurrentMode:)]
         pub fn setCurrentMode(&self, mode: Option<&UIScreenMode>);
 
-        pub fn availableModes(&self) -> Id<NSArray<UIScreenMode>> {
+        pub fn availableModes(&self) -> Id<NSArray<UIScreenMode, Shared>, Shared> {
             unsafe { msg_send_id![self, availableModes] }
         }
 
-        #[method(setOverscanCompensation:)]
+        #[sel(setOverscanCompensation:)]
         pub fn setOverscanCompensation(&self, overscanCompensation: UIScreenOverscanCompensation);
 
-        pub fn coordinateSpace(&self) -> Id<UICoordinateSpace> {
+        pub fn coordinateSpace(&self) -> Id<UICoordinateSpace, Shared> {
             unsafe { msg_send_id![self, coordinateSpace] }
         }
     }

src/platform_impl/ios/uikit/screen_mode.rs

@@ -1,5 +1,5 @@
-use icrate::Foundation::{CGSize, NSObject};
-use objc2::{extern_class, extern_methods, mutability, ClassType};
+use objc2::foundation::{CGSize, NSObject};
+use objc2::{extern_class, extern_methods, ClassType};
 
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
@@ -7,13 +7,12 @@ extern_class!(
 
     unsafe impl ClassType for UIScreenMode {
         type Super = NSObject;
-        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIScreenMode {
-        #[method(size)]
+        #[sel(size)]
         pub fn size(&self) -> CGSize;
     }
 );

src/platform_impl/ios/uikit/touch.rs

@@ -1,6 +1,6 @@
-use icrate::Foundation::{CGFloat, CGPoint, NSInteger, NSObject};
 use objc2::encode::{Encode, Encoding};
-use objc2::{extern_class, extern_methods, mutability, ClassType};
+use objc2::foundation::{CGFloat, CGPoint, NSInteger, NSObject};
+use objc2::{extern_class, extern_methods, ClassType};
 
 use super::UIView;
 
@@ -10,28 +10,27 @@ extern_class!(
 
     unsafe impl ClassType for UITouch {
         type Super = NSObject;
-        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UITouch {
-        #[method(locationInView:)]
+        #[sel(locationInView:)]
         pub fn locationInView(&self, view: Option<&UIView>) -> CGPoint;
 
-        #[method(type)]
+        #[sel(type)]
         pub fn type_(&self) -> UITouchType;
 
-        #[method(force)]
+        #[sel(force)]
         pub fn force(&self) -> CGFloat;
 
-        #[method(maximumPossibleForce)]
+        #[sel(maximumPossibleForce)]
         pub fn maximumPossibleForce(&self) -> CGFloat;
 
-        #[method(altitudeAngle)]
+        #[sel(altitudeAngle)]
         pub fn altitudeAngle(&self) -> CGFloat;
 
-        #[method(phase)]
+        #[sel(phase)]
         pub fn phase(&self) -> UITouchPhase;
     }
 );

src/platform_impl/ios/uikit/trait_collection.rs

@@ -1,6 +1,6 @@
-use icrate::Foundation::{NSInteger, NSObject};
 use objc2::encode::{Encode, Encoding};
-use objc2::{extern_class, extern_methods, mutability, ClassType};
+use objc2::foundation::{NSInteger, NSObject};
+use objc2::{extern_class, extern_methods, ClassType};
 
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
@@ -8,13 +8,12 @@ extern_class!(
 
     unsafe impl ClassType for UITraitCollection {
         type Super = NSObject;
-        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UITraitCollection {
-        #[method(forceTouchCapability)]
+        #[sel(forceTouchCapability)]
         pub fn forceTouchCapability(&self) -> UIForceTouchCapability;
     }
 );

src/platform_impl/ios/uikit/view.rs

@@ -1,7 +1,7 @@
-use icrate::Foundation::{CGFloat, CGRect, NSObject};
 use objc2::encode::{Encode, Encoding};
-use objc2::rc::Id;
-use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
+use objc2::foundation::{CGFloat, CGRect, NSObject};
+use objc2::rc::{Id, Shared};
+use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
 
 use super::{UICoordinateSpace, UIResponder, UIViewController};
 
@@ -12,58 +12,57 @@ extern_class!(
     unsafe impl ClassType for UIView {
         #[inherits(NSObject)]
         type Super = UIResponder;
-        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIView {
-        #[method(bounds)]
+        #[sel(bounds)]
         pub fn bounds(&self) -> CGRect;
 
-        #[method(setBounds:)]
+        #[sel(setBounds:)]
         pub fn setBounds(&self, value: CGRect);
 
-        #[method(frame)]
+        #[sel(frame)]
         pub fn frame(&self) -> CGRect;
 
-        #[method(setFrame:)]
+        #[sel(setFrame:)]
         pub fn setFrame(&self, value: CGRect);
 
-        #[method(contentScaleFactor)]
+        #[sel(contentScaleFactor)]
         pub fn contentScaleFactor(&self) -> CGFloat;
 
-        #[method(setContentScaleFactor:)]
+        #[sel(setContentScaleFactor:)]
         pub fn setContentScaleFactor(&self, val: CGFloat);
 
-        #[method(setMultipleTouchEnabled:)]
+        #[sel(setMultipleTouchEnabled:)]
         pub fn setMultipleTouchEnabled(&self, val: bool);
 
-        pub fn rootViewController(&self) -> Option<Id<UIViewController>> {
+        pub fn rootViewController(&self) -> Option<Id<UIViewController, Shared>> {
             unsafe { msg_send_id![self, rootViewController] }
         }
 
-        #[method(setRootViewController:)]
+        #[sel(setRootViewController:)]
         pub fn setRootViewController(&self, rootViewController: Option<&UIViewController>);
 
-        #[method(convertRect:toCoordinateSpace:)]
+        #[sel(convertRect:toCoordinateSpace:)]
         pub fn convertRect_toCoordinateSpace(
             &self,
             rect: CGRect,
             coordinateSpace: &UICoordinateSpace,
         ) -> CGRect;
 
-        #[method(convertRect:fromCoordinateSpace:)]
+        #[sel(convertRect:fromCoordinateSpace:)]
         pub fn convertRect_fromCoordinateSpace(
             &self,
             rect: CGRect,
             coordinateSpace: &UICoordinateSpace,
         ) -> CGRect;
 
-        #[method(safeAreaInsets)]
+        #[sel(safeAreaInsets)]
         pub fn safeAreaInsets(&self) -> UIEdgeInsets;
 
-        #[method(setNeedsDisplay)]
+        #[sel(setNeedsDisplay)]
         pub fn setNeedsDisplay(&self);
     }
 );

src/platform_impl/ios/uikit/view_controller.rs

@@ -1,7 +1,7 @@
-use icrate::Foundation::{NSObject, NSUInteger};
 use objc2::encode::{Encode, Encoding};
-use objc2::rc::Id;
-use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
+use objc2::foundation::{NSObject, NSUInteger};
+use objc2::rc::{Id, Shared};
+use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
 
 use super::{UIResponder, UIView};
 
@@ -12,29 +12,28 @@ extern_class!(
     unsafe impl ClassType for UIViewController {
         #[inherits(NSObject)]
         type Super = UIResponder;
-        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIViewController {
-        #[method(attemptRotationToDeviceOrientation)]
+        #[sel(attemptRotationToDeviceOrientation)]
         pub fn attemptRotationToDeviceOrientation();
 
-        #[method(setNeedsStatusBarAppearanceUpdate)]
+        #[sel(setNeedsStatusBarAppearanceUpdate)]
         pub fn setNeedsStatusBarAppearanceUpdate(&self);
 
-        #[method(setNeedsUpdateOfHomeIndicatorAutoHidden)]
+        #[sel(setNeedsUpdateOfHomeIndicatorAutoHidden)]
         pub fn setNeedsUpdateOfHomeIndicatorAutoHidden(&self);
 
-        #[method(setNeedsUpdateOfScreenEdgesDeferringSystemGestures)]
+        #[sel(setNeedsUpdateOfScreenEdgesDeferringSystemGestures)]
         pub fn setNeedsUpdateOfScreenEdgesDeferringSystemGestures(&self);
 
-        pub fn view(&self) -> Option<Id<UIView>> {
+        pub fn view(&self) -> Option<Id<UIView, Shared>> {
             unsafe { msg_send_id![self, view] }
         }
 
-        #[method(setView:)]
+        #[sel(setView:)]
         pub fn setView(&self, view: Option<&UIView>);
     }
 );

src/platform_impl/ios/uikit/window.rs

@@ -1,6 +1,6 @@
-use icrate::Foundation::NSObject;
-use objc2::rc::Id;
-use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
+use objc2::foundation::NSObject;
+use objc2::rc::{Id, Shared};
+use objc2::{extern_class, extern_methods, msg_send_id, ClassType};
 
 use super::{UIResponder, UIScreen, UIView};
 
@@ -11,26 +11,25 @@ extern_class!(
     unsafe impl ClassType for UIWindow {
         #[inherits(UIResponder, NSObject)]
         type Super = UIView;
-        type Mutability = mutability::InteriorMutable;
     }
 );
 
 extern_methods!(
     unsafe impl UIWindow {
-        pub fn screen(&self) -> Id<UIScreen> {
+        pub fn screen(&self) -> Id<UIScreen, Shared> {
             unsafe { msg_send_id![self, screen] }
         }
 
-        #[method(setScreen:)]
+        #[sel(setScreen:)]
         pub fn setScreen(&self, screen: &UIScreen);
 
-        #[method(setHidden:)]
+        #[sel(setHidden:)]
         pub fn setHidden(&self, flag: bool);
 
-        #[method(makeKeyAndVisible)]
+        #[sel(makeKeyAndVisible)]
         pub fn makeKeyAndVisible(&self);
 
-        #[method(isKeyWindow)]
+        #[sel(isKeyWindow)]
         pub fn isKeyWindow(&self) -> bool;
     }
 );

src/platform_impl/ios/view.rs

@@ -1,14 +1,10 @@
 #![allow(clippy::unnecessary_cast)]
-use std::cell::Cell;
-use std::ptr::NonNull;
 
-use icrate::Foundation::{CGFloat, CGRect, MainThreadMarker, NSObject, NSObjectProtocol, NSSet};
-use objc2::declare::{Ivar, IvarDrop};
-use objc2::rc::Id;
-use objc2::runtime::AnyClass;
-use objc2::{declare_class, extern_methods, msg_send, msg_send_id, mutability, ClassType};
+use objc2::foundation::{CGFloat, CGRect, MainThreadMarker, NSObject, NSSet};
+use objc2::rc::{Id, Shared};
+use objc2::runtime::Class;
+use objc2::{declare_class, extern_methods, msg_send, msg_send_id, ClassType};
 
-use super::app_state::{self, EventWrapper};
 use super::uikit::{
     UIApplication, UIDevice, UIEvent, UIForceTouchCapability, UIInterfaceOrientationMask,
     UIResponder, UITouch, UITouchPhase, UITouchType, UITraitCollection, UIView, UIViewController,
@@ -20,6 +16,8 @@ use crate::{
     event::{DeviceId as RootDeviceId, Event, Force, Touch, TouchPhase, WindowEvent},
     platform::ios::ValidOrientations,
     platform_impl::platform::{
+        app_state,
+        event_loop::{EventProxy, EventWrapper},
         ffi::{UIRectEdge, UIUserInterfaceIdiom},
         window::PlatformSpecificWindowBuilderAttributes,
         DeviceId, Fullscreen,
@@ -28,33 +26,33 @@ use crate::{
 };
 
 declare_class!(
-    pub(crate) struct WinitView;
+    pub(crate) struct WinitView {}
 
     unsafe impl ClassType for WinitView {
         #[inherits(UIResponder, NSObject)]
         type Super = UIView;
-        type Mutability = mutability::InteriorMutable;
         const NAME: &'static str = "WinitUIView";
     }
 
     unsafe impl WinitView {
-        #[method(drawRect:)]
+        #[sel(drawRect:)]
         fn draw_rect(&self, rect: CGRect) {
-            let mtm = MainThreadMarker::new().unwrap();
             let window = self.window().unwrap();
-            app_state::handle_nonuser_event(
-                mtm,
-                EventWrapper::StaticEvent(Event::WindowEvent {
-                    window_id: RootWindowId(window.id()),
-                    event: WindowEvent::RedrawRequested,
-                }),
-            );
+            unsafe {
+                app_state::handle_nonuser_events(
+                    std::iter::once(EventWrapper::StaticEvent(Event::RedrawRequested(
+                        RootWindowId(window.id()),
+                    )))
+                    .chain(std::iter::once(EventWrapper::StaticEvent(
+                        Event::RedrawEventsCleared,
+                    ))),
+                );
+            }
             let _: () = unsafe { msg_send![super(self), drawRect: rect] };
         }
 
-        #[method(layoutSubviews)]
+        #[sel(layoutSubviews)]
         fn layout_subviews(&self) {
-            let mtm = MainThreadMarker::new().unwrap();
             let _: () = unsafe { msg_send![super(self), layoutSubviews] };
 
             let window = self.window().unwrap();
@@ -77,18 +75,16 @@ declare_class!(
                 self.setFrame(window_bounds);
             }
 
-            app_state::handle_nonuser_event(
-                mtm,
-                EventWrapper::StaticEvent(Event::WindowEvent {
+            unsafe {
+                app_state::handle_nonuser_event(EventWrapper::StaticEvent(Event::WindowEvent {
                     window_id: RootWindowId(window.id()),
                     event: WindowEvent::Resized(size),
-                }),
-            );
+                }));
+            }
         }
 
-        #[method(setContentScaleFactor:)]
+        #[sel(setContentScaleFactor:)]
         fn set_content_scale_factor(&self, untrusted_scale_factor: CGFloat) {
-            let mtm = MainThreadMarker::new().unwrap();
             let _: () =
                 unsafe { msg_send![super(self), setContentScaleFactor: untrusted_scale_factor] };
 
@@ -116,44 +112,43 @@ declare_class!(
             let screen_space = screen.coordinateSpace();
             let screen_frame = self.convertRect_toCoordinateSpace(bounds, &screen_space);
             let size = crate::dpi::LogicalSize {
-                width: screen_frame.size.width as f64,
-                height: screen_frame.size.height as f64,
+                width: screen_frame.size.width as _,
+                height: screen_frame.size.height as _,
             };
             let window_id = RootWindowId(window.id());
-            app_state::handle_nonuser_events(
-                mtm,
-                std::iter::once(EventWrapper::ScaleFactorChanged(
-                    app_state::ScaleFactorChanged {
+            unsafe {
+                app_state::handle_nonuser_events(
+                    std::iter::once(EventWrapper::EventProxy(EventProxy::DpiChangedProxy {
                         window,
                         scale_factor,
-                        suggested_size: size.to_physical(scale_factor),
-                    },
-                ))
-                .chain(std::iter::once(EventWrapper::StaticEvent(
-                    Event::WindowEvent {
-                        window_id,
-                        event: WindowEvent::Resized(size.to_physical(scale_factor)),
-                    },
-                ))),
-            );
+                        suggested_size: size,
+                    }))
+                    .chain(std::iter::once(EventWrapper::StaticEvent(
+                        Event::WindowEvent {
+                            window_id,
+                            event: WindowEvent::Resized(size.to_physical(scale_factor)),
+                        },
+                    ))),
+                );
+            }
         }
 
-        #[method(touchesBegan:withEvent:)]
+        #[sel(touchesBegan:withEvent:)]
         fn touches_began(&self, touches: &NSSet<UITouch>, _event: Option<&UIEvent>) {
             self.handle_touches(touches)
         }
 
-        #[method(touchesMoved:withEvent:)]
+        #[sel(touchesMoved:withEvent:)]
         fn touches_moved(&self, touches: &NSSet<UITouch>, _event: Option<&UIEvent>) {
             self.handle_touches(touches)
         }
 
-        #[method(touchesEnded:withEvent:)]
+        #[sel(touchesEnded:withEvent:)]
         fn touches_ended(&self, touches: &NSSet<UITouch>, _event: Option<&UIEvent>) {
             self.handle_touches(touches)
         }
 
-        #[method(touchesCancelled:withEvent:)]
+        #[sel(touchesCancelled:withEvent:)]
         fn touches_cancelled(&self, touches: &NSSet<UITouch>, _event: Option<&UIEvent>) {
             self.handle_touches(touches)
         }
@@ -163,17 +158,17 @@ declare_class!(
 extern_methods!(
     #[allow(non_snake_case)]
     unsafe impl WinitView {
-        fn window(&self) -> Option<Id<WinitUIWindow>> {
+        fn window(&self) -> Option<Id<WinitUIWindow, Shared>> {
             unsafe { msg_send_id![self, window] }
         }
 
-        unsafe fn traitCollection(&self) -> Id<UITraitCollection> {
+        unsafe fn traitCollection(&self) -> Id<UITraitCollection, Shared> {
             msg_send_id![self, traitCollection]
         }
 
         // TODO: Allow the user to customize this
-        #[method(layerClass)]
-        pub(crate) fn layerClass() -> &'static AnyClass;
+        #[sel(layerClass)]
+        pub(crate) fn layerClass() -> &'static Class;
     }
 );
 
@@ -183,8 +178,9 @@ impl WinitView {
         _window_attributes: &WindowAttributes,
         platform_attributes: &PlatformSpecificWindowBuilderAttributes,
         frame: CGRect,
-    ) -> Id<Self> {
-        let this: Id<Self> = unsafe { msg_send_id![Self::alloc(), initWithFrame: frame] };
+    ) -> Id<Self, Shared> {
+        let this: Id<Self, Shared> =
+            unsafe { msg_send_id![msg_send_id![Self::class(), alloc], initWithFrame: frame] };
 
         this.setMultipleTouchEnabled(true);
 
@@ -207,9 +203,7 @@ impl WinitView {
                 let trait_collection = unsafe { self.traitCollection() };
                 let touch_capability = trait_collection.forceTouchCapability();
                 // Both the OS _and_ the device need to be checked for force touch support.
-                if touch_capability == UIForceTouchCapability::Available
-                    || touch_type == UITouchType::Pencil
-                {
+                if touch_capability == UIForceTouchCapability::Available {
                     let force = touch.force();
                     let max_possible_force = touch.maximumPossibleForce();
                     let altitude_angle: Option<f64> = if touch_type == UITouchType::Pencil {
@@ -260,113 +254,108 @@ impl WinitView {
                 }),
             }));
         }
-        let mtm = MainThreadMarker::new().unwrap();
-        app_state::handle_nonuser_events(mtm, touch_events);
+        unsafe {
+            app_state::handle_nonuser_events(touch_events);
+        }
     }
 }
 
-pub struct ViewControllerState {
-    prefers_status_bar_hidden: Cell<bool>,
-    prefers_home_indicator_auto_hidden: Cell<bool>,
-    supported_orientations: Cell<UIInterfaceOrientationMask>,
-    preferred_screen_edges_deferring_system_gestures: Cell<UIRectEdge>,
-}
-
 declare_class!(
     pub(crate) struct WinitViewController {
-        state: IvarDrop<Box<ViewControllerState>, "_state">,
+        _prefers_status_bar_hidden: bool,
+        _prefers_home_indicator_auto_hidden: bool,
+        _supported_orientations: UIInterfaceOrientationMask,
+        _preferred_screen_edges_deferring_system_gestures: UIRectEdge,
     }
 
-    mod view_controller_ivars;
-
     unsafe impl ClassType for WinitViewController {
         #[inherits(UIResponder, NSObject)]
         type Super = UIViewController;
-        type Mutability = mutability::InteriorMutable;
         const NAME: &'static str = "WinitUIViewController";
     }
 
     unsafe impl WinitViewController {
-        #[method(init)]
-        unsafe fn init(this: *mut Self) -> Option<NonNull<Self>> {
-            let this: Option<&mut Self> = msg_send![super(this), init];
-            this.map(|this| {
-                // These are set in WinitViewController::new, it's just to set them
-                // to _something_.
-                Ivar::write(
-                    &mut this.state,
-                    Box::new(ViewControllerState {
-                        prefers_status_bar_hidden: Cell::new(false),
-                        prefers_home_indicator_auto_hidden: Cell::new(false),
-                        supported_orientations: Cell::new(UIInterfaceOrientationMask::All),
-                        preferred_screen_edges_deferring_system_gestures: Cell::new(
-                            UIRectEdge::NONE,
-                        ),
-                    }),
-                );
-                NonNull::from(this)
-            })
+        #[sel(shouldAutorotate)]
+        fn should_autorotate(&self) -> bool {
+            true
         }
     }
 
     unsafe impl WinitViewController {
-        #[method(shouldAutorotate)]
-        fn should_autorotate(&self) -> bool {
-            true
-        }
-
-        #[method(prefersStatusBarHidden)]
+        #[sel(prefersStatusBarHidden)]
         fn prefers_status_bar_hidden(&self) -> bool {
-            self.state.prefers_status_bar_hidden.get()
+            *self._prefers_status_bar_hidden
         }
 
-        #[method(prefersHomeIndicatorAutoHidden)]
+        #[sel(setPrefersStatusBarHidden:)]
+        fn set_prefers_status_bar_hidden(&mut self, val: bool) {
+            *self._prefers_status_bar_hidden = val;
+            self.setNeedsStatusBarAppearanceUpdate();
+        }
+
+        #[sel(prefersHomeIndicatorAutoHidden)]
         fn prefers_home_indicator_auto_hidden(&self) -> bool {
-            self.state.prefers_home_indicator_auto_hidden.get()
+            *self._prefers_home_indicator_auto_hidden
         }
 
-        #[method(supportedInterfaceOrientations)]
+        #[sel(setPrefersHomeIndicatorAutoHidden:)]
+        fn set_prefers_home_indicator_auto_hidden(&mut self, val: bool) {
+            *self._prefers_home_indicator_auto_hidden = val;
+            let os_capabilities = app_state::os_capabilities();
+            if os_capabilities.home_indicator_hidden {
+                self.setNeedsUpdateOfHomeIndicatorAutoHidden();
+            } else {
+                os_capabilities.home_indicator_hidden_err_msg("ignoring")
+            }
+        }
+
+        #[sel(supportedInterfaceOrientations)]
         fn supported_orientations(&self) -> UIInterfaceOrientationMask {
-            self.state.supported_orientations.get()
+            *self._supported_orientations
         }
 
-        #[method(preferredScreenEdgesDeferringSystemGestures)]
+        #[sel(setSupportedInterfaceOrientations:)]
+        fn set_supported_orientations(&mut self, val: UIInterfaceOrientationMask) {
+            *self._supported_orientations = val;
+            UIViewController::attemptRotationToDeviceOrientation();
+        }
+
+        #[sel(preferredScreenEdgesDeferringSystemGestures)]
         fn preferred_screen_edges_deferring_system_gestures(&self) -> UIRectEdge {
-            self.state
-                .preferred_screen_edges_deferring_system_gestures
-                .get()
+            *self._preferred_screen_edges_deferring_system_gestures
+        }
+
+        #[sel(setPreferredScreenEdgesDeferringSystemGestures:)]
+        fn set_preferred_screen_edges_deferring_system_gestures(&mut self, val: UIRectEdge) {
+            *self._preferred_screen_edges_deferring_system_gestures = val;
+            let os_capabilities = app_state::os_capabilities();
+            if os_capabilities.defer_system_gestures {
+                self.setNeedsUpdateOfScreenEdgesDeferringSystemGestures();
+            } else {
+                os_capabilities.defer_system_gestures_err_msg("ignoring")
+            }
         }
     }
 );
 
+extern_methods!(
+    #[allow(non_snake_case)]
+    unsafe impl WinitViewController {
+        #[sel(setPrefersStatusBarHidden:)]
+        pub(crate) fn setPrefersStatusBarHidden(&self, flag: bool);
+
+        #[sel(setSupportedInterfaceOrientations:)]
+        pub(crate) fn setSupportedInterfaceOrientations(&self, val: UIInterfaceOrientationMask);
+
+        #[sel(setPrefersHomeIndicatorAutoHidden:)]
+        pub(crate) fn setPrefersHomeIndicatorAutoHidden(&self, val: bool);
+
+        #[sel(setPreferredScreenEdgesDeferringSystemGestures:)]
+        pub(crate) fn setPreferredScreenEdgesDeferringSystemGestures(&self, val: UIRectEdge);
+    }
+);
+
 impl WinitViewController {
-    pub(crate) fn set_prefers_status_bar_hidden(&self, val: bool) {
-        self.state.prefers_status_bar_hidden.set(val);
-        self.setNeedsStatusBarAppearanceUpdate();
-    }
-
-    pub(crate) fn set_prefers_home_indicator_auto_hidden(&self, val: bool) {
-        self.state.prefers_home_indicator_auto_hidden.set(val);
-        let os_capabilities = app_state::os_capabilities();
-        if os_capabilities.home_indicator_hidden {
-            self.setNeedsUpdateOfHomeIndicatorAutoHidden();
-        } else {
-            os_capabilities.home_indicator_hidden_err_msg("ignoring")
-        }
-    }
-
-    pub(crate) fn set_preferred_screen_edges_deferring_system_gestures(&self, val: UIRectEdge) {
-        self.state
-            .preferred_screen_edges_deferring_system_gestures
-            .set(val);
-        let os_capabilities = app_state::os_capabilities();
-        if os_capabilities.defer_system_gestures {
-            self.setNeedsUpdateOfScreenEdgesDeferringSystemGestures();
-        } else {
-            os_capabilities.defer_system_gestures_err_msg("ignoring")
-        }
-    }
-
     pub(crate) fn set_supported_interface_orientations(
         &self,
         mtm: MainThreadMarker,
@@ -389,8 +378,7 @@ impl WinitViewController {
                     | UIInterfaceOrientationMask::PortraitUpsideDown
             }
         };
-        self.state.supported_orientations.set(mask);
-        UIViewController::attemptRotationToDeviceOrientation();
+        self.setSupportedInterfaceOrientations(mask);
     }
 
     pub(crate) fn new(
@@ -398,18 +386,17 @@ impl WinitViewController {
         _window_attributes: &WindowAttributes,
         platform_attributes: &PlatformSpecificWindowBuilderAttributes,
         view: &UIView,
-    ) -> Id<Self> {
-        let this: Id<Self> = unsafe { msg_send_id![Self::alloc(), init] };
+    ) -> Id<Self, Shared> {
+        let this: Id<Self, Shared> =
+            unsafe { msg_send_id![msg_send_id![Self::class(), alloc], init] };
 
-        this.set_prefers_status_bar_hidden(platform_attributes.prefers_status_bar_hidden);
+        this.setPrefersStatusBarHidden(platform_attributes.prefers_status_bar_hidden);
 
         this.set_supported_interface_orientations(mtm, platform_attributes.valid_orientations);
 
-        this.set_prefers_home_indicator_auto_hidden(
-            platform_attributes.prefers_home_indicator_hidden,
-        );
+        this.setPrefersHomeIndicatorAutoHidden(platform_attributes.prefers_home_indicator_hidden);
 
-        this.set_preferred_screen_edges_deferring_system_gestures(
+        this.setPreferredScreenEdgesDeferringSystemGestures(
             platform_attributes
                 .preferred_screen_edges_deferring_system_gestures
                 .into(),
@@ -423,39 +410,33 @@ impl WinitViewController {
 
 declare_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
-    pub(crate) struct WinitUIWindow;
+    pub(crate) struct WinitUIWindow {}
 
     unsafe impl ClassType for WinitUIWindow {
         #[inherits(UIResponder, NSObject)]
         type Super = UIWindow;
-        type Mutability = mutability::InteriorMutable;
-        const NAME: &'static str = "WinitUIWindow";
     }
 
     unsafe impl WinitUIWindow {
-        #[method(becomeKeyWindow)]
+        #[sel(becomeKeyWindow)]
         fn become_key_window(&self) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(
-                mtm,
-                EventWrapper::StaticEvent(Event::WindowEvent {
+            unsafe {
+                app_state::handle_nonuser_event(EventWrapper::StaticEvent(Event::WindowEvent {
                     window_id: RootWindowId(self.id()),
                     event: WindowEvent::Focused(true),
-                }),
-            );
+                }));
+            }
             let _: () = unsafe { msg_send![super(self), becomeKeyWindow] };
         }
 
-        #[method(resignKeyWindow)]
+        #[sel(resignKeyWindow)]
         fn resign_key_window(&self) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(
-                mtm,
-                EventWrapper::StaticEvent(Event::WindowEvent {
+            unsafe {
+                app_state::handle_nonuser_event(EventWrapper::StaticEvent(Event::WindowEvent {
                     window_id: RootWindowId(self.id()),
                     event: WindowEvent::Focused(false),
-                }),
-            );
+                }));
+            }
             let _: () = unsafe { msg_send![super(self), resignKeyWindow] };
         }
     }
@@ -463,25 +444,26 @@ declare_class!(
 
 impl WinitUIWindow {
     pub(crate) fn new(
-        mtm: MainThreadMarker,
+        _mtm: MainThreadMarker,
         window_attributes: &WindowAttributes,
         _platform_attributes: &PlatformSpecificWindowBuilderAttributes,
         frame: CGRect,
         view_controller: &UIViewController,
-    ) -> Id<Self> {
-        let this: Id<Self> = unsafe { msg_send_id![Self::alloc(), initWithFrame: frame] };
+    ) -> Id<Self, Shared> {
+        let this: Id<Self, Shared> =
+            unsafe { msg_send_id![msg_send_id![Self::class(), alloc], initWithFrame: frame] };
 
         this.setRootViewController(Some(view_controller));
 
         match window_attributes.fullscreen.clone().map(Into::into) {
             Some(Fullscreen::Exclusive(ref video_mode)) => {
                 let monitor = video_mode.monitor();
-                let screen = monitor.ui_screen(mtm);
-                screen.setCurrentMode(Some(video_mode.screen_mode(mtm)));
+                let screen = monitor.ui_screen();
+                screen.setCurrentMode(Some(&video_mode.screen_mode.0));
                 this.setScreen(screen);
             }
             Some(Fullscreen::Borderless(Some(ref monitor))) => {
-                let screen = monitor.ui_screen(mtm);
+                let screen = monitor.ui_screen();
                 this.setScreen(screen);
             }
             _ => (),
@@ -496,45 +478,38 @@ impl WinitUIWindow {
 }
 
 declare_class!(
-    pub struct WinitApplicationDelegate;
+    pub struct WinitApplicationDelegate {}
 
     unsafe impl ClassType for WinitApplicationDelegate {
         type Super = NSObject;
-        type Mutability = mutability::InteriorMutable;
-        const NAME: &'static str = "WinitApplicationDelegate";
     }
 
     // UIApplicationDelegate protocol
     unsafe impl WinitApplicationDelegate {
-        #[method(application:didFinishLaunchingWithOptions:)]
+        #[sel(application:didFinishLaunchingWithOptions:)]
         fn did_finish_launching(&self, _application: &UIApplication, _: *mut NSObject) -> bool {
-            app_state::did_finish_launching(MainThreadMarker::new().unwrap());
+            unsafe {
+                app_state::did_finish_launching();
+            }
             true
         }
 
-        #[method(applicationDidBecomeActive:)]
+        #[sel(applicationDidBecomeActive:)]
         fn did_become_active(&self, _application: &UIApplication) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::Resumed))
+            unsafe { app_state::handle_nonuser_event(EventWrapper::StaticEvent(Event::Resumed)) }
         }
 
-        #[method(applicationWillResignActive:)]
+        #[sel(applicationWillResignActive:)]
         fn will_resign_active(&self, _application: &UIApplication) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::Suspended))
+            unsafe { app_state::handle_nonuser_event(EventWrapper::StaticEvent(Event::Suspended)) }
         }
 
-        #[method(applicationWillEnterForeground:)]
-        fn will_enter_foreground(&self, application: &UIApplication) {
-            self.send_occluded_event_for_all_windows(application, false);
-        }
+        #[sel(applicationWillEnterForeground:)]
+        fn will_enter_foreground(&self, _application: &UIApplication) {}
+        #[sel(applicationDidEnterBackground:)]
+        fn did_enter_background(&self, _application: &UIApplication) {}
 
-        #[method(applicationDidEnterBackground:)]
-        fn did_enter_background(&self, application: &UIApplication) {
-            self.send_occluded_event_for_all_windows(application, true);
-        }
-
-        #[method(applicationWillTerminate:)]
+        #[sel(applicationWillTerminate:)]
         fn will_terminate(&self, application: &UIApplication) {
             let mut events = Vec::new();
             for window in application.windows().iter() {
@@ -551,37 +526,10 @@ declare_class!(
                     }));
                 }
             }
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_events(mtm, events);
-            app_state::terminated(mtm);
-        }
-
-        #[method(applicationDidReceiveMemoryWarning:)]
-        fn did_receive_memory_warning(&self, _application: &UIApplication) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::MemoryWarning))
+            unsafe {
+                app_state::handle_nonuser_events(events);
+                app_state::terminated();
+            }
         }
     }
 );
-
-impl WinitApplicationDelegate {
-    fn send_occluded_event_for_all_windows(&self, application: &UIApplication, occluded: bool) {
-        let mut events = Vec::new();
-        for window in application.windows().iter() {
-            if window.is_kind_of::<WinitUIWindow>() {
-                // SAFETY: We just checked that the window is a `winit` window
-                let window = unsafe {
-                    let ptr: *const UIWindow = window;
-                    let ptr: *const WinitUIWindow = ptr.cast();
-                    &*ptr
-                };
-                events.push(EventWrapper::StaticEvent(Event::WindowEvent {
-                    window_id: RootWindowId(window.id()),
-                    event: WindowEvent::Occluded(occluded),
-                }));
-            }
-        }
-        let mtm = MainThreadMarker::new().unwrap();
-        app_state::handle_nonuser_events(mtm, events);
-    }
-}

src/platform_impl/ios/window.rs

@@ -1,13 +1,17 @@
 #![allow(clippy::unnecessary_cast)]
 
-use std::collections::VecDeque;
+use std::{
+    collections::VecDeque,
+    ffi::c_void,
+    ops::{Deref, DerefMut},
+};
 
-use icrate::Foundation::{CGFloat, CGPoint, CGRect, CGSize, MainThreadBound, MainThreadMarker};
-use objc2::rc::Id;
-use objc2::runtime::AnyObject;
+use objc2::foundation::{CGFloat, CGPoint, CGRect, CGSize, MainThreadMarker};
+use objc2::rc::{Id, Shared};
+use objc2::runtime::Object;
 use objc2::{class, msg_send};
+use raw_window_handle::{RawDisplayHandle, RawWindowHandle, UiKitDisplayHandle, UiKitWindowHandle};
 
-use super::app_state::EventWrapper;
 use super::uikit::{UIApplication, UIScreen, UIScreenOverscanCompensation};
 use super::view::{WinitUIWindow, WinitView, WinitViewController};
 use crate::{
@@ -17,7 +21,10 @@ use crate::{
     icon::Icon,
     platform::ios::{ScreenEdge, ValidOrientations},
     platform_impl::platform::{
-        app_state, monitor, EventLoopWindowTarget, Fullscreen, MonitorHandle,
+        app_state,
+        event_loop::{EventProxy, EventWrapper},
+        ffi::UIRectEdge,
+        monitor, EventLoopWindowTarget, Fullscreen, MonitorHandle,
     },
     window::{
         CursorGrabMode, CursorIcon, ImePurpose, ResizeDirection, Theme, UserAttentionType,
@@ -26,9 +33,9 @@ use crate::{
 };
 
 pub struct Inner {
-    window: Id<WinitUIWindow>,
-    view_controller: Id<WinitViewController>,
-    view: Id<WinitView>,
+    pub(crate) window: Id<WinitUIWindow, Shared>,
+    pub(crate) view_controller: Id<WinitViewController, Shared>,
+    pub(crate) view: Id<WinitView, Shared>,
     gl_or_metal_backed: bool,
 }
 
@@ -41,10 +48,6 @@ impl Inner {
         debug!("`Window::set_transparent` is ignored on iOS")
     }
 
-    pub fn set_blur(&self, _blur: bool) {
-        debug!("`Window::set_blur` is ignored on iOS")
-    }
-
     pub fn set_visible(&self, visible: bool) {
         self.window.setHidden(!visible)
     }
@@ -55,81 +58,90 @@ impl Inner {
     }
 
     pub fn request_redraw(&self) {
-        if self.gl_or_metal_backed {
-            let mtm = MainThreadMarker::new().unwrap();
-            // `setNeedsDisplay` does nothing on UIViews which are directly backed by CAEAGLLayer or CAMetalLayer.
-            // Ordinarily the OS sets up a bunch of UIKit state before calling drawRect: on a UIView, but when using
-            // raw or gl/metal for drawing this work is completely avoided.
-            //
-            // The docs for `setNeedsDisplay` don't mention `CAMetalLayer`; however, this has been confirmed via
-            // testing.
-            //
-            // https://developer.apple.com/documentation/uikit/uiview/1622437-setneedsdisplay?language=objc
-            app_state::queue_gl_or_metal_redraw(mtm, self.window.clone());
-        } else {
-            self.view.setNeedsDisplay();
+        unsafe {
+            if self.gl_or_metal_backed {
+                // `setNeedsDisplay` does nothing on UIViews which are directly backed by CAEAGLLayer or CAMetalLayer.
+                // Ordinarily the OS sets up a bunch of UIKit state before calling drawRect: on a UIView, but when using
+                // raw or gl/metal for drawing this work is completely avoided.
+                //
+                // The docs for `setNeedsDisplay` don't mention `CAMetalLayer`; however, this has been confirmed via
+                // testing.
+                //
+                // https://developer.apple.com/documentation/uikit/uiview/1622437-setneedsdisplay?language=objc
+                app_state::queue_gl_or_metal_redraw(self.window.clone());
+            } else {
+                self.view.setNeedsDisplay();
+            }
         }
     }
 
-    pub fn pre_present_notify(&self) {}
-
     pub fn inner_position(&self) -> Result<PhysicalPosition<i32>, NotSupportedError> {
-        let safe_area = self.safe_area_screen_space();
-        let position = LogicalPosition {
-            x: safe_area.origin.x as f64,
-            y: safe_area.origin.y as f64,
-        };
-        let scale_factor = self.scale_factor();
-        Ok(position.to_physical(scale_factor))
+        unsafe {
+            let safe_area = self.safe_area_screen_space();
+            let position = LogicalPosition {
+                x: safe_area.origin.x as f64,
+                y: safe_area.origin.y as f64,
+            };
+            let scale_factor = self.scale_factor();
+            Ok(position.to_physical(scale_factor))
+        }
     }
 
     pub fn outer_position(&self) -> Result<PhysicalPosition<i32>, NotSupportedError> {
-        let screen_frame = self.screen_frame();
-        let position = LogicalPosition {
-            x: screen_frame.origin.x as f64,
-            y: screen_frame.origin.y as f64,
-        };
-        let scale_factor = self.scale_factor();
-        Ok(position.to_physical(scale_factor))
+        unsafe {
+            let screen_frame = self.screen_frame();
+            let position = LogicalPosition {
+                x: screen_frame.origin.x as f64,
+                y: screen_frame.origin.y as f64,
+            };
+            let scale_factor = self.scale_factor();
+            Ok(position.to_physical(scale_factor))
+        }
     }
 
     pub fn set_outer_position(&self, physical_position: Position) {
-        let scale_factor = self.scale_factor();
-        let position = physical_position.to_logical::<f64>(scale_factor);
-        let screen_frame = self.screen_frame();
-        let new_screen_frame = CGRect {
-            origin: CGPoint {
-                x: position.x as _,
-                y: position.y as _,
-            },
-            size: screen_frame.size,
-        };
-        let bounds = self.rect_from_screen_space(new_screen_frame);
-        self.window.setBounds(bounds);
+        unsafe {
+            let scale_factor = self.scale_factor();
+            let position = physical_position.to_logical::<f64>(scale_factor);
+            let screen_frame = self.screen_frame();
+            let new_screen_frame = CGRect {
+                origin: CGPoint {
+                    x: position.x as _,
+                    y: position.y as _,
+                },
+                size: screen_frame.size,
+            };
+            let bounds = self.rect_from_screen_space(new_screen_frame);
+            self.window.setBounds(bounds);
+        }
     }
 
     pub fn inner_size(&self) -> PhysicalSize<u32> {
-        let scale_factor = self.scale_factor();
-        let safe_area = self.safe_area_screen_space();
-        let size = LogicalSize {
-            width: safe_area.size.width as f64,
-            height: safe_area.size.height as f64,
-        };
-        size.to_physical(scale_factor)
+        unsafe {
+            let scale_factor = self.scale_factor();
+            let safe_area = self.safe_area_screen_space();
+            let size = LogicalSize {
+                width: safe_area.size.width as f64,
+                height: safe_area.size.height as f64,
+            };
+            size.to_physical(scale_factor)
+        }
     }
 
     pub fn outer_size(&self) -> PhysicalSize<u32> {
-        let scale_factor = self.scale_factor();
-        let screen_frame = self.screen_frame();
-        let size = LogicalSize {
-            width: screen_frame.size.width as f64,
-            height: screen_frame.size.height as f64,
-        };
-        size.to_physical(scale_factor)
+        unsafe {
+            let scale_factor = self.scale_factor();
+            let screen_frame = self.screen_frame();
+            let size = LogicalSize {
+                width: screen_frame.size.width as f64,
+                height: screen_frame.size.height as f64,
+            };
+            size.to_physical(scale_factor)
+        }
     }
 
-    pub fn request_inner_size(&self, _size: Size) -> Option<PhysicalSize<u32>> {
-        Some(self.inner_size())
+    pub fn set_inner_size(&self, _size: Size) {
+        warn!("not clear what `Window::set_inner_size` means on iOS");
     }
 
     pub fn set_min_inner_size(&self, _dimensions: Option<Size>) {
@@ -197,9 +209,6 @@ impl Inner {
         Err(ExternalError::NotSupported(NotSupportedError::new()))
     }
 
-    #[inline]
-    pub fn show_window_menu(&self, _position: Position) {}
-
     pub fn set_cursor_hittest(&self, _hittest: bool) -> Result<(), ExternalError> {
         Err(ExternalError::NotSupported(NotSupportedError::new()))
     }
@@ -223,17 +232,14 @@ impl Inner {
     }
 
     pub(crate) fn set_fullscreen(&self, monitor: Option<Fullscreen>) {
-        let mtm = MainThreadMarker::new().unwrap();
         let uiscreen = match &monitor {
             Some(Fullscreen::Exclusive(video_mode)) => {
-                let uiscreen = video_mode.monitor.ui_screen(mtm);
-                uiscreen.setCurrentMode(Some(video_mode.screen_mode(mtm)));
+                let uiscreen = video_mode.monitor.ui_screen();
+                uiscreen.setCurrentMode(Some(&video_mode.screen_mode.0));
                 uiscreen.clone()
             }
-            Some(Fullscreen::Borderless(Some(monitor))) => monitor.ui_screen(mtm).clone(),
-            Some(Fullscreen::Borderless(None)) => {
-                self.current_monitor_inner().ui_screen(mtm).clone()
-            }
+            Some(Fullscreen::Borderless(Some(monitor))) => monitor.ui_screen().clone(),
+            Some(Fullscreen::Borderless(None)) => self.current_monitor_inner().ui_screen().clone(),
             None => {
                 warn!("`Window::set_fullscreen(None)` ignored on iOS");
                 return;
@@ -256,21 +262,22 @@ impl Inner {
     }
 
     pub(crate) fn fullscreen(&self) -> Option<Fullscreen> {
-        let mtm = MainThreadMarker::new().unwrap();
-        let monitor = self.current_monitor_inner();
-        let uiscreen = monitor.ui_screen(mtm);
-        let screen_space_bounds = self.screen_frame();
-        let screen_bounds = uiscreen.bounds();
+        unsafe {
+            let monitor = self.current_monitor_inner();
+            let uiscreen = monitor.ui_screen();
+            let screen_space_bounds = self.screen_frame();
+            let screen_bounds = uiscreen.bounds();
 
-        // TODO: track fullscreen instead of relying on brittle float comparisons
-        if screen_space_bounds.origin.x == screen_bounds.origin.x
-            && screen_space_bounds.origin.y == screen_bounds.origin.y
-            && screen_space_bounds.size.width == screen_bounds.size.width
-            && screen_space_bounds.size.height == screen_bounds.size.height
-        {
-            Some(Fullscreen::Borderless(Some(monitor)))
-        } else {
-            None
+            // TODO: track fullscreen instead of relying on brittle float comparisons
+            if screen_space_bounds.origin.x == screen_bounds.origin.x
+                && screen_space_bounds.origin.y == screen_bounds.origin.y
+                && screen_space_bounds.size.width == screen_bounds.size.width
+                && screen_space_bounds.size.height == screen_bounds.size.height
+            {
+                Some(Fullscreen::Borderless(Some(monitor)))
+            } else {
+                None
+            }
         }
     }
 
@@ -331,47 +338,16 @@ impl Inner {
         self.window.id()
     }
 
-    #[cfg(feature = "rwh_04")]
-    pub fn raw_window_handle_rwh_04(&self) -> rwh_04::RawWindowHandle {
-        let mut window_handle = rwh_04::UiKitHandle::empty();
+    pub fn raw_window_handle(&self) -> RawWindowHandle {
+        let mut window_handle = UiKitWindowHandle::empty();
         window_handle.ui_window = Id::as_ptr(&self.window) as _;
         window_handle.ui_view = Id::as_ptr(&self.view) as _;
         window_handle.ui_view_controller = Id::as_ptr(&self.view_controller) as _;
-        rwh_04::RawWindowHandle::UiKit(window_handle)
+        RawWindowHandle::UiKit(window_handle)
     }
 
-    #[cfg(feature = "rwh_05")]
-    pub fn raw_window_handle_rwh_05(&self) -> rwh_05::RawWindowHandle {
-        let mut window_handle = rwh_05::UiKitWindowHandle::empty();
-        window_handle.ui_window = Id::as_ptr(&self.window) as _;
-        window_handle.ui_view = Id::as_ptr(&self.view) as _;
-        window_handle.ui_view_controller = Id::as_ptr(&self.view_controller) as _;
-        rwh_05::RawWindowHandle::UiKit(window_handle)
-    }
-
-    #[cfg(feature = "rwh_05")]
-    pub fn raw_display_handle_rwh_05(&self) -> rwh_05::RawDisplayHandle {
-        rwh_05::RawDisplayHandle::UiKit(rwh_05::UiKitDisplayHandle::empty())
-    }
-
-    #[cfg(feature = "rwh_06")]
-    pub fn raw_window_handle_rwh_06(&self) -> Result<rwh_06::RawWindowHandle, rwh_06::HandleError> {
-        let mut window_handle = rwh_06::UiKitWindowHandle::new({
-            let ui_view = Id::as_ptr(&self.view) as _;
-            std::ptr::NonNull::new(ui_view).expect("Id<T> should never be null")
-        });
-        window_handle.ui_view_controller =
-            std::ptr::NonNull::new(Id::as_ptr(&self.view_controller) as _);
-        Ok(rwh_06::RawWindowHandle::UiKit(window_handle))
-    }
-
-    #[cfg(feature = "rwh_06")]
-    pub fn raw_display_handle_rwh_06(
-        &self,
-    ) -> Result<rwh_06::RawDisplayHandle, rwh_06::HandleError> {
-        Ok(rwh_06::RawDisplayHandle::UiKit(
-            rwh_06::UiKitDisplayHandle::new(),
-        ))
+    pub fn raw_display_handle(&self) -> RawDisplayHandle {
+        RawDisplayHandle::UiKit(UiKitDisplayHandle::empty())
     }
 
     pub fn theme(&self) -> Option<Theme> {
@@ -379,8 +355,6 @@ impl Inner {
         None
     }
 
-    pub fn set_content_protected(&self, _protected: bool) {}
-
     pub fn has_focus(&self) -> bool {
         self.window.isKeyWindow()
     }
@@ -401,16 +375,41 @@ impl Inner {
 }
 
 pub struct Window {
-    inner: MainThreadBound<Inner>,
+    pub inner: Inner,
+}
+
+impl Drop for Window {
+    fn drop(&mut self) {
+        assert_main_thread!("`Window::drop` can only be run on the main thread on iOS");
+    }
+}
+
+unsafe impl Send for Window {}
+unsafe impl Sync for Window {}
+
+impl Deref for Window {
+    type Target = Inner;
+
+    fn deref(&self) -> &Inner {
+        assert_main_thread!("`Window` methods can only be run on the main thread on iOS");
+        &self.inner
+    }
+}
+
+impl DerefMut for Window {
+    fn deref_mut(&mut self) -> &mut Inner {
+        assert_main_thread!("`Window` methods can only be run on the main thread on iOS");
+        &mut self.inner
+    }
 }
 
 impl Window {
     pub(crate) fn new<T>(
-        event_loop: &EventLoopWindowTarget<T>,
+        _event_loop: &EventLoopWindowTarget<T>,
         window_attributes: WindowAttributes,
         platform_attributes: PlatformSpecificWindowBuilderAttributes,
     ) -> Result<Window, RootOsError> {
-        let mtm = event_loop.mtm;
+        let mtm = MainThreadMarker::new().unwrap();
 
         if window_attributes.min_inner_size.is_some() {
             warn!("`WindowAttributes::min_inner_size` is ignored on iOS");
@@ -424,8 +423,8 @@ impl Window {
         let main_screen = UIScreen::main(mtm);
         let fullscreen = window_attributes.fullscreen.clone().map(Into::into);
         let screen = match fullscreen {
-            Some(Fullscreen::Exclusive(ref video_mode)) => video_mode.monitor.ui_screen(mtm),
-            Some(Fullscreen::Borderless(Some(ref monitor))) => monitor.ui_screen(mtm),
+            Some(Fullscreen::Exclusive(ref video_mode)) => video_mode.monitor.ui_screen(),
+            Some(Fullscreen::Borderless(Some(ref monitor))) => monitor.ui_screen(),
             Some(Fullscreen::Borderless(None)) | None => &main_screen,
         };
 
@@ -465,7 +464,7 @@ impl Window {
             &view_controller,
         );
 
-        app_state::set_key_window(mtm, &window);
+        unsafe { app_state::set_key_window(&window) };
 
         // Like the Windows and macOS backends, we send a `ScaleFactorChanged` and `Resized`
         // event on window creation if the DPI factor != 1.0
@@ -477,51 +476,50 @@ impl Window {
             let screen_space = screen.coordinateSpace();
             let screen_frame = view.convertRect_toCoordinateSpace(bounds, &screen_space);
             let size = crate::dpi::LogicalSize {
-                width: screen_frame.size.width as f64,
-                height: screen_frame.size.height as f64,
+                width: screen_frame.size.width as _,
+                height: screen_frame.size.height as _,
             };
             let window_id = RootWindowId(window.id());
-            app_state::handle_nonuser_events(
-                mtm,
-                std::iter::once(EventWrapper::ScaleFactorChanged(
-                    app_state::ScaleFactorChanged {
+            unsafe {
+                app_state::handle_nonuser_events(
+                    std::iter::once(EventWrapper::EventProxy(EventProxy::DpiChangedProxy {
                         window: window.clone(),
                         scale_factor,
-                        suggested_size: size.to_physical(scale_factor),
-                    },
-                ))
-                .chain(std::iter::once(EventWrapper::StaticEvent(
-                    Event::WindowEvent {
-                        window_id,
-                        event: WindowEvent::Resized(size.to_physical(scale_factor)),
-                    },
-                ))),
-            );
+                        suggested_size: size,
+                    }))
+                    .chain(std::iter::once(EventWrapper::StaticEvent(
+                        Event::WindowEvent {
+                            window_id,
+                            event: WindowEvent::Resized(size.to_physical(scale_factor)),
+                        },
+                    ))),
+                );
+            }
         }
 
-        let inner = Inner {
-            window,
-            view_controller,
-            view,
-            gl_or_metal_backed,
-        };
         Ok(Window {
-            inner: MainThreadBound::new(inner, mtm),
+            inner: Inner {
+                window,
+                view_controller,
+                view,
+                gl_or_metal_backed,
+            },
         })
     }
-
-    pub(crate) fn maybe_queue_on_main(&self, f: impl FnOnce(&Inner) + Send + 'static) {
-        // For now, don't actually do queuing, since it may be less predictable
-        self.maybe_wait_on_main(f)
-    }
-
-    pub(crate) fn maybe_wait_on_main<R: Send>(&self, f: impl FnOnce(&Inner) -> R + Send) -> R {
-        self.inner.get_on_main(|inner, _mtm| f(inner))
-    }
 }
 
 // WindowExtIOS
 impl Inner {
+    pub fn ui_window(&self) -> *mut c_void {
+        Id::as_ptr(&self.window) as *mut c_void
+    }
+    pub fn ui_view_controller(&self) -> *mut c_void {
+        Id::as_ptr(&self.view_controller) as *mut c_void
+    }
+    pub fn ui_view(&self) -> *mut c_void {
+        Id::as_ptr(&self.view) as *mut c_void
+    }
+
     pub fn set_scale_factor(&self, scale_factor: f64) {
         assert!(
             dpi::validate_scale_factor(scale_factor),
@@ -540,37 +538,42 @@ impl Inner {
 
     pub fn set_prefers_home_indicator_hidden(&self, hidden: bool) {
         self.view_controller
-            .set_prefers_home_indicator_auto_hidden(hidden);
+            .setPrefersHomeIndicatorAutoHidden(hidden);
     }
 
     pub fn set_preferred_screen_edges_deferring_system_gestures(&self, edges: ScreenEdge) {
+        let edges: UIRectEdge = edges.into();
         self.view_controller
-            .set_preferred_screen_edges_deferring_system_gestures(edges.into());
+            .setPreferredScreenEdgesDeferringSystemGestures(edges);
     }
 
     pub fn set_prefers_status_bar_hidden(&self, hidden: bool) {
-        self.view_controller.set_prefers_status_bar_hidden(hidden);
+        self.view_controller.setPrefersStatusBarHidden(hidden);
     }
 }
 
 impl Inner {
-    fn screen_frame(&self) -> CGRect {
+    // requires main thread
+    unsafe fn screen_frame(&self) -> CGRect {
         self.rect_to_screen_space(self.window.bounds())
     }
 
-    fn rect_to_screen_space(&self, rect: CGRect) -> CGRect {
+    // requires main thread
+    unsafe fn rect_to_screen_space(&self, rect: CGRect) -> CGRect {
         let screen_space = self.window.screen().coordinateSpace();
         self.window
             .convertRect_toCoordinateSpace(rect, &screen_space)
     }
 
-    fn rect_from_screen_space(&self, rect: CGRect) -> CGRect {
+    // requires main thread
+    unsafe fn rect_from_screen_space(&self, rect: CGRect) -> CGRect {
         let screen_space = self.window.screen().coordinateSpace();
         self.window
             .convertRect_fromCoordinateSpace(rect, &screen_space)
     }
 
-    fn safe_area_screen_space(&self) -> CGRect {
+    // requires main thread
+    unsafe fn safe_area_screen_space(&self) -> CGRect {
         let bounds = self.window.bounds();
         if app_state::os_capabilities().safe_area {
             let safe_area = self.window.safeAreaInsets();
@@ -588,7 +591,7 @@ impl Inner {
         } else {
             let screen_frame = self.rect_to_screen_space(bounds);
             let status_bar_frame = {
-                let app = UIApplication::shared(MainThreadMarker::new().unwrap()).expect(
+                let app = UIApplication::shared(MainThreadMarker::new().unwrap_unchecked()).expect(
                     "`Window::get_inner_position` cannot be called before `EventLoop::run` on iOS",
                 );
                 app.statusBarFrame()
@@ -645,8 +648,8 @@ impl From<u64> for WindowId {
 unsafe impl Send for WindowId {}
 unsafe impl Sync for WindowId {}
 
-impl From<&AnyObject> for WindowId {
-    fn from(window: &AnyObject) -> WindowId {
+impl From<&Object> for WindowId {
+    fn from(window: &Object) -> WindowId {
         WindowId {
             window: window as *const _ as _,
         }

src/platform_impl/linux/common/xkb_state.rs

@@ -13,7 +13,7 @@ use xkbcommon_dl::{
     XkbCommonCompose,
 };
 #[cfg(feature = "wayland")]
-use {memmap2::MmapOptions, std::os::unix::io::OwnedFd};
+use {memmap2::MmapOptions, wayland_backend::io_lifetimes::OwnedFd};
 #[cfg(feature = "x11")]
 use {x11_dl::xlib_xcb::xcb_connection_t, xkbcommon_dl::x11::xkbcommon_x11_handle};
 
@@ -250,43 +250,37 @@ impl KbdState {
             .unwrap_or_else(|| "C".into());
         let locale = CString::new(locale.into_vec()).unwrap();
 
-        let compose_table = unsafe {
-            (XKBCH.xkb_compose_table_new_from_locale)(
-                self.xkb_context,
-                locale.as_ptr(),
-                ffi::xkb_compose_compile_flags::XKB_COMPOSE_COMPILE_NO_FLAGS,
-            )
-        };
+        let compose_table = (XKBCH.xkb_compose_table_new_from_locale)(
+            self.xkb_context,
+            locale.as_ptr(),
+            ffi::xkb_compose_compile_flags::XKB_COMPOSE_COMPILE_NO_FLAGS,
+        );
 
         if compose_table.is_null() {
             // init of compose table failed, continue without compose
             return;
         }
 
-        let compose_state = unsafe {
-            (XKBCH.xkb_compose_state_new)(
-                compose_table,
-                ffi::xkb_compose_state_flags::XKB_COMPOSE_STATE_NO_FLAGS,
-            )
-        };
+        let compose_state = (XKBCH.xkb_compose_state_new)(
+            compose_table,
+            ffi::xkb_compose_state_flags::XKB_COMPOSE_STATE_NO_FLAGS,
+        );
 
         if compose_state.is_null() {
             // init of compose state failed, continue without compose
-            unsafe { (XKBCH.xkb_compose_table_unref)(compose_table) };
+            (XKBCH.xkb_compose_table_unref)(compose_table);
             return;
         }
 
-        let compose_state_2 = unsafe {
-            (XKBCH.xkb_compose_state_new)(
-                compose_table,
-                ffi::xkb_compose_state_flags::XKB_COMPOSE_STATE_NO_FLAGS,
-            )
-        };
+        let compose_state_2 = (XKBCH.xkb_compose_state_new)(
+            compose_table,
+            ffi::xkb_compose_state_flags::XKB_COMPOSE_STATE_NO_FLAGS,
+        );
 
         if compose_state_2.is_null() {
             // init of compose state failed, continue without compose
-            unsafe { (XKBCH.xkb_compose_table_unref)(compose_table) };
-            unsafe { (XKBCH.xkb_compose_state_unref)(compose_state) };
+            (XKBCH.xkb_compose_table_unref)(compose_table);
+            (XKBCH.xkb_compose_state_unref)(compose_state);
             return;
         }
 
@@ -302,73 +296,65 @@ impl KbdState {
     }
 
     unsafe fn de_init(&mut self) {
-        unsafe { (XKBH.xkb_state_unref)(self.xkb_state) };
+        (XKBH.xkb_state_unref)(self.xkb_state);
         self.xkb_state = ptr::null_mut();
-        unsafe { (XKBH.xkb_keymap_unref)(self.xkb_keymap) };
+        (XKBH.xkb_keymap_unref)(self.xkb_keymap);
         self.xkb_keymap = ptr::null_mut();
     }
 
     #[cfg(feature = "x11")]
     pub unsafe fn init_with_x11_keymap(&mut self) {
         if !self.xkb_keymap.is_null() {
-            unsafe { self.de_init() };
+            self.de_init();
         }
 
         // TODO: Support keyboards other than the "virtual core keyboard device".
-        self.core_keyboard_id =
-            unsafe { (XKBXH.xkb_x11_get_core_keyboard_device_id)(self.xcb_connection) };
-        let keymap = unsafe {
-            (XKBXH.xkb_x11_keymap_new_from_device)(
-                self.xkb_context,
-                self.xcb_connection,
-                self.core_keyboard_id,
-                xkbcommon_dl::xkb_keymap_compile_flags::XKB_KEYMAP_COMPILE_NO_FLAGS,
-            )
-        };
+        self.core_keyboard_id = (XKBXH.xkb_x11_get_core_keyboard_device_id)(self.xcb_connection);
+        let keymap = (XKBXH.xkb_x11_keymap_new_from_device)(
+            self.xkb_context,
+            self.xcb_connection,
+            self.core_keyboard_id,
+            xkbcommon_dl::xkb_keymap_compile_flags::XKB_KEYMAP_COMPILE_NO_FLAGS,
+        );
         if keymap.is_null() {
             panic!("Failed to get keymap from X11 server.");
         }
 
-        let state = unsafe {
-            (XKBXH.xkb_x11_state_new_from_device)(
-                keymap,
-                self.xcb_connection,
-                self.core_keyboard_id,
-            )
-        };
-        unsafe { self.post_init(state, keymap) };
+        let state = (XKBXH.xkb_x11_state_new_from_device)(
+            keymap,
+            self.xcb_connection,
+            self.core_keyboard_id,
+        );
+        self.post_init(state, keymap);
     }
 
     #[cfg(feature = "wayland")]
     pub unsafe fn init_with_fd(&mut self, fd: OwnedFd, size: usize) {
         if !self.xkb_keymap.is_null() {
-            unsafe { self.de_init() };
+            self.de_init();
         }
 
-        let map = unsafe {
-            MmapOptions::new()
-                .len(size)
-                .map_copy_read_only(&fd)
-                .unwrap()
-        };
+        let map = MmapOptions::new()
+            .len(size)
+            .map_copy_read_only(&fd)
+            .unwrap();
 
-        let keymap = unsafe {
-            (XKBH.xkb_keymap_new_from_string)(
-                self.xkb_context,
-                map.as_ptr() as *const _,
-                ffi::xkb_keymap_format::XKB_KEYMAP_FORMAT_TEXT_V1,
-                ffi::xkb_keymap_compile_flags::XKB_KEYMAP_COMPILE_NO_FLAGS,
-            )
-        };
+        let keymap = (XKBH.xkb_keymap_new_from_string)(
+            self.xkb_context,
+            map.as_ptr() as *const _,
+            ffi::xkb_keymap_format::XKB_KEYMAP_FORMAT_TEXT_V1,
+            ffi::xkb_keymap_compile_flags::XKB_KEYMAP_COMPILE_NO_FLAGS,
+        );
 
         if keymap.is_null() {
             panic!("Received invalid keymap from compositor.");
         }
 
-        let state = unsafe { (XKBH.xkb_state_new)(keymap) };
-        unsafe { self.post_init(state, keymap) };
+        let state = (XKBH.xkb_state_new)(keymap);
+        self.post_init(state, keymap);
     }
 
+    #[cfg(feature = "wayland")]
     pub fn key_repeats(&mut self, keycode: ffi::xkb_keycode_t) -> bool {
         unsafe { (XKBH.xkb_keymap_key_repeats)(self.xkb_keymap, keycode) == 1 }
     }

src/platform_impl/linux/mod.rs

@@ -3,44 +3,45 @@
 #[cfg(all(not(x11_platform), not(wayland_platform)))]
 compile_error!("Please select a feature to build for unix: `x11`, `wayland`");
 
-use std::sync::Arc;
-use std::time::Duration;
+#[cfg(wayland_platform)]
+use std::error::Error;
+
 use std::{collections::VecDeque, env, fmt};
 #[cfg(x11_platform)]
-use std::{ffi::CStr, mem::MaybeUninit, os::raw::*, sync::Mutex};
+use std::{
+    ffi::CStr,
+    mem::MaybeUninit,
+    os::raw::*,
+    sync::{Arc, Mutex},
+};
 
 #[cfg(x11_platform)]
 use once_cell::sync::Lazy;
+use raw_window_handle::{RawDisplayHandle, RawWindowHandle};
 use smol_str::SmolStr;
 
+#[cfg(x11_platform)]
+pub use self::x11::XNotSupported;
+#[cfg(x11_platform)]
+use self::x11::{ffi::XVisualInfo, util::WindowType as XWindowType, XConnection, XError};
 #[cfg(x11_platform)]
 use crate::platform::x11::XlibErrorHook;
 use crate::{
     dpi::{PhysicalPosition, PhysicalSize, Position, Size},
-    error::{EventLoopError, ExternalError, NotSupportedError, OsError as RootOsError},
-    event::KeyEvent,
-    event_loop::{
-        AsyncRequestSerial, ControlFlow, DeviceEvents, EventLoopClosed,
-        EventLoopWindowTarget as RootELW,
-    },
+    error::{ExternalError, NotSupportedError, OsError as RootOsError},
+    event::{Event, KeyEvent},
+    event_loop::{ControlFlow, DeviceEvents, EventLoopClosed, EventLoopWindowTarget as RootELW},
     icon::Icon,
     keyboard::{Key, KeyCode},
-    platform::{
-        modifier_supplement::KeyEventExtModifierSupplement, pump_events::PumpStatus,
-        scancode::KeyCodeExtScancode,
-    },
+    platform::{modifier_supplement::KeyEventExtModifierSupplement, scancode::KeyCodeExtScancode},
     window::{
-        ActivationToken, CursorGrabMode, CursorIcon, ImePurpose, ResizeDirection, Theme,
-        UserAttentionType, WindowAttributes, WindowButtons, WindowLevel,
+        CursorGrabMode, CursorIcon, ImePurpose, ResizeDirection, Theme, UserAttentionType,
+        WindowAttributes, WindowButtons, WindowLevel,
     },
 };
-#[cfg(x11_platform)]
-pub use x11::XNotSupported;
-#[cfg(x11_platform)]
-use x11::{util::WindowType as XWindowType, X11Error, XConnection, XError};
 
 pub(crate) use crate::icon::RgbaIcon as PlatformIcon;
-pub(crate) use crate::platform_impl::Fullscreen;
+pub(self) use crate::platform_impl::Fullscreen;
 
 pub mod common;
 #[cfg(wayland_platform)]
@@ -48,6 +49,15 @@ pub mod wayland;
 #[cfg(x11_platform)]
 pub mod x11;
 
+/// Environment variable specifying which backend should be used on unix platform.
+///
+/// Legal values are x11 and wayland. If this variable is set only the named backend
+/// will be tried by winit. If it is not set, winit will try to connect to a wayland connection,
+/// and if it fails will fallback on x11.
+///
+/// If this variable is set with any other value, winit will panic.
+const BACKEND_PREFERENCE_ENV_VAR: &str = "WINIT_UNIX_BACKEND";
+
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub(crate) enum Backend {
     #[cfg(x11_platform)]
@@ -77,38 +87,32 @@ impl ApplicationName {
 #[derive(Clone)]
 pub struct PlatformSpecificWindowBuilderAttributes {
     pub name: Option<ApplicationName>,
-    pub activation_token: Option<ActivationToken>,
     #[cfg(x11_platform)]
-    pub x11: X11WindowBuilderAttributes,
-}
-
-#[derive(Clone)]
-#[cfg(x11_platform)]
-pub struct X11WindowBuilderAttributes {
-    pub visual_id: Option<x11rb::protocol::xproto::Visualid>,
+    pub visual_infos: Option<XVisualInfo>,
+    #[cfg(x11_platform)]
     pub screen_id: Option<i32>,
+    #[cfg(x11_platform)]
     pub base_size: Option<Size>,
+    #[cfg(x11_platform)]
     pub override_redirect: bool,
+    #[cfg(x11_platform)]
     pub x11_window_types: Vec<XWindowType>,
-
-    /// The parent window to embed this window into.
-    pub embed_window: Option<x11rb::protocol::xproto::Window>,
 }
 
 impl Default for PlatformSpecificWindowBuilderAttributes {
     fn default() -> Self {
         Self {
             name: None,
-            activation_token: None,
             #[cfg(x11_platform)]
-            x11: X11WindowBuilderAttributes {
-                visual_id: None,
-                screen_id: None,
-                base_size: None,
-                override_redirect: false,
-                x11_window_types: vec![XWindowType::Normal],
-                embed_window: None,
-            },
+            visual_infos: None,
+            #[cfg(x11_platform)]
+            screen_id: None,
+            #[cfg(x11_platform)]
+            base_size: None,
+            #[cfg(x11_platform)]
+            override_redirect: false,
+            #[cfg(x11_platform)]
+            x11_window_types: vec![XWindowType::Normal],
         }
     }
 }
@@ -119,21 +123,23 @@ pub(crate) static X11_BACKEND: Lazy<Mutex<Result<Arc<XConnection>, XNotSupported
 
 #[derive(Debug, Clone)]
 pub enum OsError {
-    Misc(&'static str),
     #[cfg(x11_platform)]
-    XError(Arc<X11Error>),
+    XError(XError),
+    #[cfg(x11_platform)]
+    XMisc(&'static str),
     #[cfg(wayland_platform)]
-    WaylandError(Arc<wayland::WaylandError>),
+    WaylandMisc(&'static str),
 }
 
 impl fmt::Display for OsError {
     fn fmt(&self, _f: &mut fmt::Formatter<'_>) -> Result<(), fmt::Error> {
         match *self {
-            OsError::Misc(e) => _f.pad(e),
             #[cfg(x11_platform)]
-            OsError::XError(ref e) => fmt::Display::fmt(e, _f),
+            OsError::XError(ref e) => _f.pad(&e.description),
+            #[cfg(x11_platform)]
+            OsError::XMisc(e) => _f.pad(e),
             #[cfg(wayland_platform)]
-            OsError::WaylandError(ref e) => fmt::Display::fmt(e, _f),
+            OsError::WaylandMisc(e) => _f.pad(e),
         }
     }
 }
@@ -177,9 +183,9 @@ pub enum DeviceId {
 impl DeviceId {
     pub const unsafe fn dummy() -> Self {
         #[cfg(wayland_platform)]
-        return DeviceId::Wayland(unsafe { wayland::DeviceId::dummy() });
+        return DeviceId::Wayland(wayland::DeviceId::dummy());
         #[cfg(all(not(wayland_platform), x11_platform))]
-        return DeviceId::X(unsafe { x11::DeviceId::dummy() });
+        return DeviceId::X(x11::DeviceId::dummy());
     }
 }
 
@@ -282,7 +288,7 @@ impl VideoMode {
 
     #[inline]
     pub fn monitor(&self) -> MonitorHandle {
-        x11_or_wayland!(match self; VideoMode(m) => m.monitor(); as MonitorHandle)
+        x11_or_wayland!(match self; VideoMode(m) => m.monitor())
     }
 }
 
@@ -305,17 +311,14 @@ impl Window {
         }
     }
 
-    pub(crate) fn maybe_queue_on_main(&self, f: impl FnOnce(&Self) + Send + 'static) {
-        f(self)
-    }
-
-    pub(crate) fn maybe_wait_on_main<R: Send>(&self, f: impl FnOnce(&Self) -> R + Send) -> R {
-        f(self)
-    }
-
     #[inline]
     pub fn id(&self) -> WindowId {
-        x11_or_wayland!(match self; Window(w) => w.id())
+        match self {
+            #[cfg(wayland_platform)]
+            Self::Wayland(window) => window.id(),
+            #[cfg(x11_platform)]
+            Self::X(window) => window.id(),
+        }
     }
 
     #[inline]
@@ -328,11 +331,6 @@ impl Window {
         x11_or_wayland!(match self; Window(w) => w.set_transparent(transparent));
     }
 
-    #[inline]
-    pub fn set_blur(&self, blur: bool) {
-        x11_or_wayland!(match self; Window(w) => w.set_blur(blur));
-    }
-
     #[inline]
     pub fn set_visible(&self, visible: bool) {
         x11_or_wayland!(match self; Window(w) => w.set_visible(visible))
@@ -369,13 +367,8 @@ impl Window {
     }
 
     #[inline]
-    pub fn request_inner_size(&self, size: Size) -> Option<PhysicalSize<u32>> {
-        x11_or_wayland!(match self; Window(w) => w.request_inner_size(size))
-    }
-
-    #[inline]
-    pub(crate) fn request_activation_token(&self) -> Result<AsyncRequestSerial, NotSupportedError> {
-        x11_or_wayland!(match self; Window(w) => w.request_activation_token())
+    pub fn set_inner_size(&self, size: Size) {
+        x11_or_wayland!(match self; Window(w) => w.set_inner_size(size))
     }
 
     #[inline]
@@ -443,11 +436,6 @@ impl Window {
         x11_or_wayland!(match self; Window(window) => window.drag_resize_window(direction))
     }
 
-    #[inline]
-    pub fn show_window_menu(&self, position: Position) {
-        x11_or_wayland!(match self; Window(w) => w.show_window_menu(position))
-    }
-
     #[inline]
     pub fn set_cursor_hittest(&self, hittest: bool) -> Result<(), ExternalError> {
         x11_or_wayland!(match self; Window(w) => w.set_cursor_hittest(hittest))
@@ -504,13 +492,23 @@ impl Window {
     }
 
     #[inline]
-    pub fn set_window_level(&self, level: WindowLevel) {
-        x11_or_wayland!(match self; Window(w) => w.set_window_level(level))
+    pub fn set_window_level(&self, _level: WindowLevel) {
+        match self {
+            #[cfg(x11_platform)]
+            Window::X(ref w) => w.set_window_level(_level),
+            #[cfg(wayland_platform)]
+            Window::Wayland(_) => (),
+        }
     }
 
     #[inline]
-    pub fn set_window_icon(&self, window_icon: Option<Icon>) {
-        x11_or_wayland!(match self; Window(w) => w.set_window_icon(window_icon.map(|icon| icon.inner)))
+    pub fn set_window_icon(&self, _window_icon: Option<Icon>) {
+        match self {
+            #[cfg(x11_platform)]
+            Window::X(ref w) => w.set_window_icon(_window_icon),
+            #[cfg(wayland_platform)]
+            Window::Wayland(_) => (),
+        }
     }
 
     #[inline]
@@ -535,10 +533,20 @@ impl Window {
 
     #[inline]
     pub fn focus_window(&self) {
-        x11_or_wayland!(match self; Window(w) => w.focus_window())
+        match self {
+            #[cfg(x11_platform)]
+            Window::X(ref w) => w.focus_window(),
+            #[cfg(wayland_platform)]
+            Window::Wayland(_) => (),
+        }
     }
     pub fn request_user_attention(&self, request_type: Option<UserAttentionType>) {
-        x11_or_wayland!(match self; Window(w) => w.request_user_attention(request_type))
+        match self {
+            #[cfg(x11_platform)]
+            Window::X(ref w) => w.request_user_attention(request_type),
+            #[cfg(wayland_platform)]
+            Window::Wayland(ref w) => w.request_user_attention(request_type),
+        }
     }
 
     #[inline]
@@ -546,14 +554,20 @@ impl Window {
         x11_or_wayland!(match self; Window(w) => w.request_redraw())
     }
 
-    #[inline]
-    pub fn pre_present_notify(&self) {
-        x11_or_wayland!(match self; Window(w) => w.pre_present_notify())
-    }
-
     #[inline]
     pub fn current_monitor(&self) -> Option<MonitorHandle> {
-        Some(x11_or_wayland!(match self; Window(w) => w.current_monitor()?; as MonitorHandle))
+        match self {
+            #[cfg(x11_platform)]
+            Window::X(ref window) => {
+                let current_monitor = MonitorHandle::X(window.current_monitor());
+                Some(current_monitor)
+            }
+            #[cfg(wayland_platform)]
+            Window::Wayland(ref window) => {
+                let current_monitor = MonitorHandle::Wayland(window.current_monitor()?);
+                Some(current_monitor)
+            }
+        }
     }
 
     #[inline]
@@ -576,39 +590,25 @@ impl Window {
 
     #[inline]
     pub fn primary_monitor(&self) -> Option<MonitorHandle> {
-        Some(x11_or_wayland!(match self; Window(w) => w.primary_monitor()?; as MonitorHandle))
+        match self {
+            #[cfg(x11_platform)]
+            Window::X(ref window) => {
+                let primary_monitor = MonitorHandle::X(window.primary_monitor());
+                Some(primary_monitor)
+            }
+            #[cfg(wayland_platform)]
+            Window::Wayland(ref window) => window.primary_monitor(),
+        }
     }
 
-    #[cfg(feature = "rwh_04")]
     #[inline]
-    pub fn raw_window_handle_rwh_04(&self) -> rwh_04::RawWindowHandle {
-        x11_or_wayland!(match self; Window(window) => window.raw_window_handle_rwh_04())
+    pub fn raw_window_handle(&self) -> RawWindowHandle {
+        x11_or_wayland!(match self; Window(window) => window.raw_window_handle())
     }
 
-    #[cfg(feature = "rwh_05")]
     #[inline]
-    pub fn raw_window_handle_rwh_05(&self) -> rwh_05::RawWindowHandle {
-        x11_or_wayland!(match self; Window(window) => window.raw_window_handle_rwh_05())
-    }
-
-    #[cfg(feature = "rwh_05")]
-    #[inline]
-    pub fn raw_display_handle_rwh_05(&self) -> rwh_05::RawDisplayHandle {
-        x11_or_wayland!(match self; Window(window) => window.raw_display_handle_rwh_05())
-    }
-
-    #[cfg(feature = "rwh_06")]
-    #[inline]
-    pub fn raw_window_handle_rwh_06(&self) -> Result<rwh_06::RawWindowHandle, rwh_06::HandleError> {
-        x11_or_wayland!(match self; Window(window) => window.raw_window_handle_rwh_06())
-    }
-
-    #[cfg(feature = "rwh_06")]
-    #[inline]
-    pub fn raw_display_handle_rwh_06(
-        &self,
-    ) -> Result<rwh_06::RawDisplayHandle, rwh_06::HandleError> {
-        x11_or_wayland!(match self; Window(window) => window.raw_display_handle_rwh_06())
+    pub fn raw_display_handle(&self) -> RawDisplayHandle {
+        x11_or_wayland!(match self; Window(window) => window.raw_display_handle())
     }
 
     #[inline]
@@ -621,10 +621,6 @@ impl Window {
         x11_or_wayland!(match self; Window(window) => window.theme())
     }
 
-    pub fn set_content_protected(&self, protected: bool) {
-        x11_or_wayland!(match self; Window(window) => window.set_content_protected(protected))
-    }
-
     #[inline]
     pub fn has_focus(&self) -> bool {
         x11_or_wayland!(match self; Window(window) => window.has_focus())
@@ -680,31 +676,26 @@ unsafe extern "C" fn x_error_callback(
     if let Ok(ref xconn) = *xconn_lock {
         // Call all the hooks.
         let mut error_handled = false;
-        for hook in unsafe { XLIB_ERROR_HOOKS.lock() }.unwrap().iter() {
+        for hook in XLIB_ERROR_HOOKS.lock().unwrap().iter() {
             error_handled |= hook(display as *mut _, event as *mut _);
         }
 
         // `assume_init` is safe here because the array consists of `MaybeUninit` values,
         // which do not require initialization.
-        let mut buf: [MaybeUninit<c_char>; 1024] = unsafe { MaybeUninit::uninit().assume_init() };
-        unsafe {
-            (xconn.xlib.XGetErrorText)(
-                display,
-                (*event).error_code as c_int,
-                buf.as_mut_ptr() as *mut c_char,
-                buf.len() as c_int,
-            )
-        };
-        let description =
-            unsafe { CStr::from_ptr(buf.as_ptr() as *const c_char) }.to_string_lossy();
+        let mut buf: [MaybeUninit<c_char>; 1024] = MaybeUninit::uninit().assume_init();
+        (xconn.xlib.XGetErrorText)(
+            display,
+            (*event).error_code as c_int,
+            buf.as_mut_ptr() as *mut c_char,
+            buf.len() as c_int,
+        );
+        let description = CStr::from_ptr(buf.as_ptr() as *const c_char).to_string_lossy();
 
-        let error = unsafe {
-            XError {
-                description: description.into_owned(),
-                error_code: (*event).error_code,
-                request_code: (*event).request_code,
-                minor_code: (*event).minor_code,
-            }
+        let error = XError {
+            description: description.into_owned(),
+            error_code: (*event).error_code,
+            request_code: (*event).request_code,
+            minor_code: (*event).minor_code,
         };
 
         // Don't log error.
@@ -739,9 +730,7 @@ impl<T: 'static> Clone for EventLoopProxy<T> {
 }
 
 impl<T: 'static> EventLoop<T> {
-    pub(crate) fn new(
-        attributes: &PlatformSpecificEventLoopAttributes,
-    ) -> Result<Self, EventLoopError> {
+    pub(crate) fn new(attributes: &PlatformSpecificEventLoopAttributes) -> Self {
         if !attributes.any_thread && !is_main_thread() {
             panic!(
                 "Initializing the event loop outside of the main thread is a significant \
@@ -751,39 +740,65 @@ impl<T: 'static> EventLoop<T> {
             );
         }
 
-        // NOTE: Wayland first because of X11 could be present under wayland as well.
-        let backend = match (
-            attributes.forced_backend,
-            env::var("WAYLAND_DISPLAY").is_ok(),
-            env::var("DISPLAY").is_ok(),
-        ) {
-            // User is forcing a backend.
-            (Some(backend), _, _) => backend,
-            // Wayland is present.
-            #[cfg(wayland_platform)]
-            (None, true, _) => Backend::Wayland,
-            // X11 is present.
-            #[cfg(x11_platform)]
-            (None, _, true) => Backend::X,
-            // No backend is present.
-            _ => {
-                return Err(EventLoopError::Os(os_error!(OsError::Misc(
-                    "neither WAYLAND_DISPLAY nor DISPLAY is set."
-                ))));
+        #[cfg(x11_platform)]
+        if attributes.forced_backend == Some(Backend::X) {
+            // TODO: Propagate
+            return EventLoop::new_x11_any_thread().unwrap();
+        }
+
+        #[cfg(wayland_platform)]
+        if attributes.forced_backend == Some(Backend::Wayland) {
+            // TODO: Propagate
+            return EventLoop::new_wayland_any_thread().expect("failed to open Wayland connection");
+        }
+
+        if let Ok(env_var) = env::var(BACKEND_PREFERENCE_ENV_VAR) {
+            match env_var.as_str() {
+                "x11" => {
+                    // TODO: propagate
+                    #[cfg(x11_platform)]
+                    return EventLoop::new_x11_any_thread()
+                        .expect("Failed to initialize X11 backend");
+                    #[cfg(not(x11_platform))]
+                    panic!("x11 feature is not enabled")
+                }
+                "wayland" => {
+                    #[cfg(wayland_platform)]
+                    return EventLoop::new_wayland_any_thread()
+                        .expect("Failed to initialize Wayland backend");
+                    #[cfg(not(wayland_platform))]
+                    panic!("wayland feature is not enabled");
+                }
+                _ => panic!(
+                    "Unknown environment variable value for {BACKEND_PREFERENCE_ENV_VAR}, try one of `x11`,`wayland`",
+                ),
             }
+        }
+
+        #[cfg(wayland_platform)]
+        let wayland_err = match EventLoop::new_wayland_any_thread() {
+            Ok(event_loop) => return event_loop,
+            Err(err) => err,
         };
 
-        // Create the display based on the backend.
-        match backend {
-            #[cfg(wayland_platform)]
-            Backend::Wayland => EventLoop::new_wayland_any_thread().map_err(Into::into),
-            #[cfg(x11_platform)]
-            Backend::X => Ok(EventLoop::new_x11_any_thread().unwrap()),
-        }
+        #[cfg(x11_platform)]
+        let x11_err = match EventLoop::new_x11_any_thread() {
+            Ok(event_loop) => return event_loop,
+            Err(err) => err,
+        };
+
+        #[cfg(not(wayland_platform))]
+        let wayland_err = "backend disabled";
+        #[cfg(not(x11_platform))]
+        let x11_err = "backend disabled";
+
+        panic!(
+            "Failed to initialize any backend! Wayland status: {wayland_err:?} X11 status: {x11_err:?}",
+        );
     }
 
     #[cfg(wayland_platform)]
-    fn new_wayland_any_thread() -> Result<EventLoop<T>, EventLoopError> {
+    fn new_wayland_any_thread() -> Result<EventLoop<T>, Box<dyn Error>> {
         wayland::EventLoop::new().map(|evlp| EventLoop::Wayland(Box::new(evlp)))
     }
 
@@ -801,25 +816,18 @@ impl<T: 'static> EventLoop<T> {
         x11_or_wayland!(match self; EventLoop(evlp) => evlp.create_proxy(); as EventLoopProxy)
     }
 
-    pub fn run<F>(mut self, callback: F) -> Result<(), EventLoopError>
+    pub fn run_return<F>(&mut self, callback: F) -> i32
     where
-        F: FnMut(crate::event::Event<T>, &RootELW<T>),
+        F: FnMut(crate::event::Event<'_, T>, &RootELW<T>, &mut ControlFlow),
     {
-        self.run_on_demand(callback)
+        x11_or_wayland!(match self; EventLoop(evlp) => evlp.run_return(callback))
     }
 
-    pub fn run_on_demand<F>(&mut self, callback: F) -> Result<(), EventLoopError>
+    pub fn run<F>(self, callback: F) -> !
     where
-        F: FnMut(crate::event::Event<T>, &RootELW<T>),
+        F: 'static + FnMut(crate::event::Event<'_, T>, &RootELW<T>, &mut ControlFlow),
     {
-        x11_or_wayland!(match self; EventLoop(evlp) => evlp.run_on_demand(callback))
-    }
-
-    pub fn pump_events<F>(&mut self, timeout: Option<Duration>, callback: F) -> PumpStatus
-    where
-        F: FnMut(crate::event::Event<T>, &RootELW<T>),
-    {
-        x11_or_wayland!(match self; EventLoop(evlp) => evlp.pump_events(timeout, callback))
+        x11_or_wayland!(match self; EventLoop(evlp) => evlp.run(callback))
     }
 
     pub fn window_target(&self) -> &crate::event_loop::EventLoopWindowTarget<T> {
@@ -857,78 +865,69 @@ impl<T> EventLoopWindowTarget<T> {
             #[cfg(wayland_platform)]
             EventLoopWindowTarget::Wayland(ref evlp) => evlp
                 .available_monitors()
+                .into_iter()
                 .map(MonitorHandle::Wayland)
                 .collect(),
             #[cfg(x11_platform)]
-            EventLoopWindowTarget::X(ref evlp) => {
-                evlp.available_monitors().map(MonitorHandle::X).collect()
-            }
+            EventLoopWindowTarget::X(ref evlp) => evlp
+                .x_connection()
+                .available_monitors()
+                .into_iter()
+                .map(MonitorHandle::X)
+                .collect(),
         }
     }
 
     #[inline]
     pub fn primary_monitor(&self) -> Option<MonitorHandle> {
-        Some(
-            x11_or_wayland!(match self; EventLoopWindowTarget(evlp) => evlp.primary_monitor()?; as MonitorHandle),
-        )
+        match *self {
+            #[cfg(wayland_platform)]
+            EventLoopWindowTarget::Wayland(ref evlp) => evlp.primary_monitor(),
+            #[cfg(x11_platform)]
+            EventLoopWindowTarget::X(ref evlp) => {
+                let primary_monitor = MonitorHandle::X(evlp.x_connection().primary_monitor());
+                Some(primary_monitor)
+            }
+        }
     }
 
     #[inline]
-    pub fn listen_device_events(&self, allowed: DeviceEvents) {
-        x11_or_wayland!(match self; Self(evlp) => evlp.listen_device_events(allowed))
+    pub fn listen_device_events(&self, _allowed: DeviceEvents) {
+        match *self {
+            #[cfg(wayland_platform)]
+            EventLoopWindowTarget::Wayland(_) => (),
+            #[cfg(x11_platform)]
+            EventLoopWindowTarget::X(ref evlp) => evlp.set_listen_device_events(_allowed),
+        }
     }
 
-    #[cfg(feature = "rwh_05")]
-    #[inline]
-    pub fn raw_display_handle_rwh_05(&self) -> rwh_05::RawDisplayHandle {
-        x11_or_wayland!(match self; Self(evlp) => evlp.raw_display_handle_rwh_05())
-    }
-
-    #[cfg(feature = "rwh_06")]
-    #[inline]
-    pub fn raw_display_handle_rwh_06(
-        &self,
-    ) -> Result<rwh_06::RawDisplayHandle, rwh_06::HandleError> {
-        x11_or_wayland!(match self; Self(evlp) => evlp.raw_display_handle_rwh_06())
-    }
-
-    pub(crate) fn set_control_flow(&self, control_flow: ControlFlow) {
-        x11_or_wayland!(match self; Self(evlp) => evlp.set_control_flow(control_flow))
-    }
-
-    pub(crate) fn control_flow(&self) -> ControlFlow {
-        x11_or_wayland!(match self; Self(evlp) => evlp.control_flow())
-    }
-
-    pub(crate) fn exit(&self) {
-        x11_or_wayland!(match self; Self(evlp) => evlp.exit())
-    }
-
-    pub(crate) fn exiting(&self) -> bool {
-        x11_or_wayland!(match self; Self(evlp) => evlp.exiting())
-    }
-
-    fn set_exit_code(&self, code: i32) {
-        x11_or_wayland!(match self; Self(evlp) => evlp.set_exit_code(code))
-    }
-
-    fn exit_code(&self) -> Option<i32> {
-        x11_or_wayland!(match self; Self(evlp) => evlp.exit_code())
+    pub fn raw_display_handle(&self) -> raw_window_handle::RawDisplayHandle {
+        x11_or_wayland!(match self; Self(evlp) => evlp.raw_display_handle())
     }
 }
 
-/// Returns the minimum `Option<Duration>`, taking into account that `None`
-/// equates to an infinite timeout, not a zero timeout (so can't just use
-/// `Option::min`)
-fn min_timeout(a: Option<Duration>, b: Option<Duration>) -> Option<Duration> {
-    a.map_or(b, |a_timeout| {
-        b.map_or(Some(a_timeout), |b_timeout| Some(a_timeout.min(b_timeout)))
-    })
+fn sticky_exit_callback<T, F>(
+    evt: Event<'_, T>,
+    target: &RootELW<T>,
+    control_flow: &mut ControlFlow,
+    callback: &mut F,
+) where
+    F: FnMut(Event<'_, T>, &RootELW<T>, &mut ControlFlow),
+{
+    // make ControlFlow::ExitWithCode sticky by providing a dummy
+    // control flow reference if it is already ExitWithCode.
+    if let ControlFlow::ExitWithCode(code) = *control_flow {
+        callback(evt, target, &mut ControlFlow::ExitWithCode(code))
+    } else {
+        callback(evt, target, control_flow)
+    }
 }
 
 #[cfg(target_os = "linux")]
 fn is_main_thread() -> bool {
-    rustix::thread::gettid() == rustix::process::getpid()
+    use libc::{c_long, getpid, syscall, SYS_gettid};
+
+    unsafe { syscall(SYS_gettid) == getpid() as c_long }
 }
 
 #[cfg(any(target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]

src/platform_impl/linux/wayland/event_loop/mod.rs

@@ -1,29 +1,26 @@
 //! The event-loop routines.
 
-use std::cell::{Cell, RefCell};
+use std::cell::RefCell;
+use std::error::Error;
 use std::io::Result as IOResult;
 use std::marker::PhantomData;
 use std::mem;
+use std::process;
 use std::rc::Rc;
 use std::sync::atomic::Ordering;
-use std::sync::{Arc, Mutex};
 use std::time::{Duration, Instant};
 
+use raw_window_handle::{RawDisplayHandle, WaylandDisplayHandle};
+
 use sctk::reexports::calloop;
-use sctk::reexports::calloop::Error as CalloopError;
-use sctk::reexports::calloop_wayland_source::WaylandSource;
 use sctk::reexports::client::globals;
-use sctk::reexports::client::{Connection, QueueHandle};
+use sctk::reexports::client::{Connection, Proxy, QueueHandle, WaylandSource};
 
 use crate::dpi::{LogicalSize, PhysicalSize};
-use crate::error::{EventLoopError, OsError as RootOsError};
-use crate::event::{Event, InnerSizeWriter, StartCause, WindowEvent};
-use crate::event_loop::{
-    ControlFlow, DeviceEvents, EventLoopWindowTarget as RootEventLoopWindowTarget,
-};
-use crate::platform::pump_events::PumpStatus;
-use crate::platform_impl::platform::min_timeout;
-use crate::platform_impl::{EventLoopWindowTarget as PlatformEventLoopWindowTarget, OsError};
+use crate::event::{Event, StartCause, WindowEvent};
+use crate::event_loop::{ControlFlow, EventLoopWindowTarget as RootEventLoopWindowTarget};
+use crate::platform_impl::platform::sticky_exit_callback;
+use crate::platform_impl::EventLoopWindowTarget as PlatformEventLoopWindowTarget;
 
 mod proxy;
 pub mod sink;
@@ -32,20 +29,12 @@ pub use proxy::EventLoopProxy;
 use sink::EventSink;
 
 use super::state::{WindowCompositorUpdate, WinitState};
-use super::window::state::FrameCallbackState;
-use super::{DeviceId, WaylandError, WindowId};
+use super::{DeviceId, WindowId};
 
 type WaylandDispatcher = calloop::Dispatcher<'static, WaylandSource<WinitState>, WinitState>;
 
 /// The Wayland event loop.
 pub struct EventLoop<T: 'static> {
-    /// Has `run` or `run_on_demand` been called or a call to `pump_events` that starts the loop
-    loop_running: bool,
-
-    buffer_sink: EventSink,
-    compositor_updates: Vec<WindowCompositorUpdate>,
-    window_ids: Vec<WindowId>,
-
     /// Sender of user events.
     user_events_sender: calloop::channel::Sender<T>,
 
@@ -70,110 +59,61 @@ pub struct EventLoop<T: 'static> {
 }
 
 impl<T: 'static> EventLoop<T> {
-    pub fn new() -> Result<EventLoop<T>, EventLoopError> {
-        macro_rules! map_err {
-            ($e:expr, $err:expr) => {
-                $e.map_err(|error| os_error!($err(error).into()))
-            };
-        }
+    pub fn new() -> Result<EventLoop<T>, Box<dyn Error>> {
+        let connection = Connection::connect_to_env()?;
 
-        let connection = map_err!(Connection::connect_to_env(), WaylandError::Connection)?;
-
-        let (globals, mut event_queue) = map_err!(
-            globals::registry_queue_init(&connection),
-            WaylandError::Global
-        )?;
+        let (globals, mut event_queue) = globals::registry_queue_init(&connection)?;
         let queue_handle = event_queue.handle();
 
-        let event_loop = map_err!(
-            calloop::EventLoop::<WinitState>::try_new(),
-            WaylandError::Calloop
-        )?;
+        let event_loop = calloop::EventLoop::<WinitState>::try_new()?;
 
-        let mut winit_state = WinitState::new(&globals, &queue_handle, event_loop.handle())
-            .map_err(|error| os_error!(error))?;
+        let mut winit_state = WinitState::new(&globals, &queue_handle, event_loop.handle())?;
 
         // NOTE: do a roundtrip after binding the globals to prevent potential
         // races with the server.
-        map_err!(
-            event_queue.roundtrip(&mut winit_state),
-            WaylandError::Dispatch
-        )?;
+        event_queue.roundtrip(&mut winit_state)?;
 
         // Register Wayland source.
-        let wayland_source = WaylandSource::new(connection.clone(), event_queue);
+        let wayland_source = WaylandSource::new(event_queue)?;
         let wayland_dispatcher =
-            calloop::Dispatcher::new(wayland_source, |_, queue, winit_state: &mut WinitState| {
-                let result = queue.dispatch_pending(winit_state);
-                if result.is_ok()
-                    && (!winit_state.events_sink.is_empty()
-                        || !winit_state.window_compositor_updates.is_empty())
-                {
-                    winit_state.dispatched_events = true;
-                }
-                result
+            calloop::Dispatcher::new(wayland_source, |_, queue, winit_state| {
+                queue.dispatch_pending(winit_state)
             });
 
-        map_err!(
-            event_loop
-                .handle()
-                .register_dispatcher(wayland_dispatcher.clone()),
-            WaylandError::Calloop
-        )?;
+        event_loop
+            .handle()
+            .register_dispatcher(wayland_dispatcher.clone())?;
 
         // Setup the user proxy.
         let pending_user_events = Rc::new(RefCell::new(Vec::new()));
         let pending_user_events_clone = pending_user_events.clone();
         let (user_events_sender, user_events_channel) = calloop::channel::channel();
-        let result = event_loop
+        event_loop
             .handle()
-            .insert_source(
-                user_events_channel,
-                move |event, _, winit_state: &mut WinitState| {
-                    if let calloop::channel::Event::Msg(msg) = event {
-                        winit_state.dispatched_events = true;
-                        pending_user_events_clone.borrow_mut().push(msg);
-                    }
-                },
-            )
-            .map_err(|error| error.error);
-        map_err!(result, WaylandError::Calloop)?;
+            .insert_source(user_events_channel, move |event, _, _| {
+                if let calloop::channel::Event::Msg(msg) = event {
+                    pending_user_events_clone.borrow_mut().push(msg);
+                }
+            })?;
 
         // An event's loop awakener to wake up for window events from winit's windows.
-        let (event_loop_awakener, event_loop_awakener_source) = map_err!(
-            calloop::ping::make_ping()
-                .map_err(|error| CalloopError::OtherError(Box::new(error).into())),
-            WaylandError::Calloop
-        )?;
-
-        let result = event_loop
+        let (event_loop_awakener, event_loop_awakener_source) = calloop::ping::make_ping()?;
+        event_loop
             .handle()
-            .insert_source(
-                event_loop_awakener_source,
-                move |_, _, winit_state: &mut WinitState| {
-                    // Mark that we have something to dispatch.
-                    winit_state.dispatched_events = true;
-                },
-            )
-            .map_err(|error| error.error);
-        map_err!(result, WaylandError::Calloop)?;
+            .insert_source(event_loop_awakener_source, move |_, _, _| {
+                // No extra handling is required, we just need to wake-up.
+            })?;
 
         let window_target = EventLoopWindowTarget {
             connection: connection.clone(),
             wayland_dispatcher: wayland_dispatcher.clone(),
             event_loop_awakener,
             queue_handle,
-            control_flow: Cell::new(ControlFlow::default()),
-            exit: Cell::new(None),
             state: RefCell::new(winit_state),
             _marker: PhantomData,
         };
 
         let event_loop = Self {
-            loop_running: false,
-            compositor_updates: Vec::new(),
-            buffer_sink: EventSink::default(),
-            window_ids: Vec::new(),
             connection,
             wayland_dispatcher,
             user_events_sender,
@@ -188,339 +128,330 @@ impl<T: 'static> EventLoop<T> {
         Ok(event_loop)
     }
 
-    pub fn run_on_demand<F>(&mut self, mut event_handler: F) -> Result<(), EventLoopError>
+    pub fn run<F>(mut self, callback: F) -> !
     where
-        F: FnMut(Event<T>, &RootEventLoopWindowTarget<T>),
+        F: FnMut(Event<'_, T>, &RootEventLoopWindowTarget<T>, &mut ControlFlow) + 'static,
     {
-        if self.loop_running {
-            return Err(EventLoopError::AlreadyRunning);
-        }
-
-        let exit = loop {
-            match self.pump_events(None, &mut event_handler) {
-                PumpStatus::Exit(0) => {
-                    break Ok(());
-                }
-                PumpStatus::Exit(code) => {
-                    break Err(EventLoopError::ExitFailure(code));
-                }
-                _ => {
-                    continue;
-                }
-            }
-        };
-
-        // Applications aren't allowed to carry windows between separate
-        // `run_on_demand` calls but if they have only just dropped their
-        // windows we need to make sure those last requests are sent to the
-        // compositor.
-        let _ = self.roundtrip().map_err(EventLoopError::Os);
-
-        exit
+        let exit_code = self.run_return(callback);
+        process::exit(exit_code);
     }
 
-    pub fn pump_events<F>(&mut self, timeout: Option<Duration>, mut callback: F) -> PumpStatus
+    pub fn run_return<F>(&mut self, mut callback: F) -> i32
     where
-        F: FnMut(Event<T>, &RootEventLoopWindowTarget<T>),
+        F: FnMut(Event<'_, T>, &RootEventLoopWindowTarget<T>, &mut ControlFlow),
     {
-        if !self.loop_running {
-            self.loop_running = true;
+        let mut control_flow = ControlFlow::Poll;
 
-            // Run the initial loop iteration.
-            self.single_iteration(&mut callback, StartCause::Init);
-        }
+        // XXX preallocate certian structures to avoid allocating on each loop iteration.
+        let mut window_ids = Vec::<WindowId>::new();
+        let mut compositor_updates = Vec::<WindowCompositorUpdate>::new();
+        let mut buffer_sink = EventSink::new();
 
-        // Consider the possibility that the `StartCause::Init` iteration could
-        // request to Exit.
-        if !self.exiting() {
-            self.poll_events_with_timeout(timeout, &mut callback);
-        }
-        if let Some(code) = self.exit_code() {
-            self.loop_running = false;
+        callback(
+            Event::NewEvents(StartCause::Init),
+            &self.window_target,
+            &mut control_flow,
+        );
 
-            callback(Event::LoopExiting, self.window_target());
-
-            PumpStatus::Exit(code)
-        } else {
-            PumpStatus::Continue
-        }
-    }
-
-    pub fn poll_events_with_timeout<F>(&mut self, mut timeout: Option<Duration>, mut callback: F)
-    where
-        F: FnMut(Event<T>, &RootEventLoopWindowTarget<T>),
-    {
-        let cause = loop {
-            let start = Instant::now();
-
-            timeout = {
-                let control_flow_timeout = match self.control_flow() {
-                    ControlFlow::Wait => None,
-                    ControlFlow::Poll => Some(Duration::ZERO),
-                    ControlFlow::WaitUntil(wait_deadline) => {
-                        Some(wait_deadline.saturating_duration_since(start))
-                    }
-                };
-                min_timeout(control_flow_timeout, timeout)
-            };
-
-            // NOTE Ideally we should flush as the last thing we do before polling
-            // to wait for events, and this should be done by the calloop
-            // WaylandSource but we currently need to flush writes manually.
-            //
-            // Checking for flush error is essential to perform an exit with error, since
-            // once we have a protocol error, we could get stuck retrying...
-            if self.connection.flush().is_err() {
-                self.set_exit_code(1);
-                return;
-            }
-
-            if let Err(error) = self.loop_dispatch(timeout) {
-                // NOTE We exit on errors from dispatches, since if we've got protocol error
-                // libwayland-client/wayland-rs will inform us anyway, but crashing downstream is not
-                // really an option. Instead we inform that the event loop got destroyed. We may
-                // communicate an error that something was terminated, but winit doesn't provide us
-                // with an API to do that via some event.
-                // Still, we set the exit code to the error's OS error code, or to 1 if not possible.
-                let exit_code = error.raw_os_error().unwrap_or(1);
-                self.set_exit_code(exit_code);
-                return;
-            }
-
-            // NB: `StartCause::Init` is handled as a special case and doesn't need
-            // to be considered here
-            let cause = match self.control_flow() {
-                ControlFlow::Poll => StartCause::Poll,
-                ControlFlow::Wait => StartCause::WaitCancelled {
-                    start,
-                    requested_resume: None,
-                },
-                ControlFlow::WaitUntil(deadline) => {
-                    if Instant::now() < deadline {
-                        StartCause::WaitCancelled {
-                            start,
-                            requested_resume: Some(deadline),
-                        }
-                    } else {
-                        StartCause::ResumeTimeReached {
-                            start,
-                            requested_resume: deadline,
-                        }
-                    }
-                }
-            };
-
-            // Reduce spurious wake-ups.
-            let dispatched_events = self.with_state(|state| state.dispatched_events);
-            if matches!(cause, StartCause::WaitCancelled { .. }) && !dispatched_events {
-                continue;
-            }
-
-            break cause;
-        };
-
-        self.single_iteration(&mut callback, cause);
-    }
-
-    fn single_iteration<F>(&mut self, callback: &mut F, cause: StartCause)
-    where
-        F: FnMut(Event<T>, &RootEventLoopWindowTarget<T>),
-    {
-        // NOTE currently just indented to simplify the diff
-
-        // We retain these grow-only scratch buffers as part of the EventLoop
-        // for the sake of avoiding lots of reallocs. We take them here to avoid
-        // trying to mutably borrow `self` more than once and we swap them back
-        // when finished.
-        let mut compositor_updates = std::mem::take(&mut self.compositor_updates);
-        let mut buffer_sink = std::mem::take(&mut self.buffer_sink);
-        let mut window_ids = std::mem::take(&mut self.window_ids);
-
-        callback(Event::NewEvents(cause), &self.window_target);
-
-        // NB: For consistency all platforms must emit a 'resumed' event even though Wayland
+        // XXX For consistency all platforms must emit a 'Resumed' event even though Wayland
         // applications don't themselves have a formal suspend/resume lifecycle.
-        if cause == StartCause::Init {
-            callback(Event::Resumed, &self.window_target);
-        }
+        callback(Event::Resumed, &self.window_target, &mut control_flow);
 
-        // Handle pending user events. We don't need back buffer, since we can't dispatch
-        // user events indirectly via callback to the user.
-        for user_event in self.pending_user_events.borrow_mut().drain(..) {
-            callback(Event::UserEvent(user_event), &self.window_target);
-        }
+        // XXX We break on errors from dispatches, since if we've got protocol error
+        // libwayland-client/wayland-rs will inform us anyway, but crashing downstream is not
+        // really an option. Instead we inform that the event loop got destroyed. We may
+        // communicate an error that something was terminated, but winit doesn't provide us
+        // with an API to do that via some event.
+        // Still, we set the exit code to the error's OS error code, or to 1 if not possible.
+        let exit_code = loop {
+            // Flush the connection.
+            let _ = self.connection.flush();
 
-        // Drain the pending compositor updates.
-        self.with_state(|state| compositor_updates.append(&mut state.window_compositor_updates));
+            // During the run of the user callback, some other code monitoring and reading the
+            // Wayland socket may have been run (mesa for example does this with vsync), if that
+            // is the case, some events may have been enqueued in our event queue.
+            //
+            // If some messages are there, the event loop needs to behave as if it was instantly
+            // woken up by messages arriving from the Wayland socket, to avoid delaying the
+            // dispatch of these events until we're woken up again.
+            let instant_wakeup = {
+                let mut wayland_source = self.wayland_dispatcher.as_source_mut();
+                let queue = wayland_source.queue();
+                let state = match &mut self.window_target.p {
+                    PlatformEventLoopWindowTarget::Wayland(window_target) => {
+                        window_target.state.get_mut()
+                    }
+                    #[cfg(x11_platform)]
+                    _ => unreachable!(),
+                };
 
-        for mut compositor_update in compositor_updates.drain(..) {
-            let window_id = compositor_update.window_id;
-            if let Some(scale_factor) = compositor_update.scale_factor {
-                let physical_size = self.with_state(|state| {
-                    let windows = state.windows.get_mut();
-                    let mut window = windows.get(&window_id).unwrap().lock().unwrap();
+                match queue.dispatch_pending(state) {
+                    Ok(dispatched) => dispatched > 0,
+                    Err(error) => {
+                        error!("Error dispatching wayland queue: {}", error);
+                        break 1;
+                    }
+                }
+            };
 
-                    // Set the new scale factor.
-                    window.set_scale_factor(scale_factor);
-                    let window_size = compositor_update.size.unwrap_or(window.inner_size());
-                    logical_to_physical_rounded(window_size, scale_factor)
-                });
+            match control_flow {
+                ControlFlow::ExitWithCode(code) => break code,
+                ControlFlow::Poll => {
+                    // Non-blocking dispatch.
+                    let timeout = Duration::ZERO;
+                    if let Err(error) = self.loop_dispatch(Some(timeout)) {
+                        break error.raw_os_error().unwrap_or(1);
+                    }
 
-                // Stash the old window size.
-                let old_physical_size = physical_size;
+                    callback(
+                        Event::NewEvents(StartCause::Poll),
+                        &self.window_target,
+                        &mut control_flow,
+                    );
+                }
+                ControlFlow::Wait => {
+                    let timeout = if instant_wakeup {
+                        Some(Duration::ZERO)
+                    } else {
+                        None
+                    };
 
-                let new_inner_size = Arc::new(Mutex::new(physical_size));
-                callback(
-                    Event::WindowEvent {
-                        window_id: crate::window::WindowId(window_id),
-                        event: WindowEvent::ScaleFactorChanged {
-                            scale_factor,
-                            inner_size_writer: InnerSizeWriter::new(Arc::downgrade(
-                                &new_inner_size,
-                            )),
-                        },
-                    },
+                    if let Err(error) = self.loop_dispatch(timeout) {
+                        break error.raw_os_error().unwrap_or(1);
+                    }
+
+                    callback(
+                        Event::NewEvents(StartCause::WaitCancelled {
+                            start: Instant::now(),
+                            requested_resume: None,
+                        }),
+                        &self.window_target,
+                        &mut control_flow,
+                    );
+                }
+                ControlFlow::WaitUntil(deadline) => {
+                    let start = Instant::now();
+
+                    // Compute the amount of time we'll block for.
+                    let duration = if deadline > start && !instant_wakeup {
+                        deadline - start
+                    } else {
+                        Duration::ZERO
+                    };
+
+                    if let Err(error) = self.loop_dispatch(Some(duration)) {
+                        break error.raw_os_error().unwrap_or(1);
+                    }
+
+                    let now = Instant::now();
+
+                    if now < deadline {
+                        callback(
+                            Event::NewEvents(StartCause::WaitCancelled {
+                                start,
+                                requested_resume: Some(deadline),
+                            }),
+                            &self.window_target,
+                            &mut control_flow,
+                        )
+                    } else {
+                        callback(
+                            Event::NewEvents(StartCause::ResumeTimeReached {
+                                start,
+                                requested_resume: deadline,
+                            }),
+                            &self.window_target,
+                            &mut control_flow,
+                        )
+                    }
+                }
+            }
+
+            // Handle pending user events. We don't need back buffer, since we can't dispatch
+            // user events indirectly via callback to the user.
+            for user_event in self.pending_user_events.borrow_mut().drain(..) {
+                sticky_exit_callback(
+                    Event::UserEvent(user_event),
                     &self.window_target,
+                    &mut control_flow,
+                    &mut callback,
                 );
+            }
 
-                let physical_size = *new_inner_size.lock().unwrap();
-                drop(new_inner_size);
-                let new_logical_size = physical_size.to_logical(scale_factor);
+            // Drain the pending compositor updates.
+            self.with_state(|state| {
+                compositor_updates.append(&mut state.window_compositor_updates)
+            });
 
-                // Resize the window when user altered the size.
-                if old_physical_size != physical_size {
-                    self.with_state(|state| {
+            for mut compositor_update in compositor_updates.drain(..) {
+                let window_id = compositor_update.window_id;
+                if let Some(scale_factor) = compositor_update.scale_factor {
+                    let mut physical_size = self.with_state(|state| {
                         let windows = state.windows.get_mut();
                         let mut window = windows.get(&window_id).unwrap().lock().unwrap();
-                        window.resize(new_logical_size);
+
+                        // Set the new scale factor.
+                        window.set_scale_factor(scale_factor);
+                        let window_size = compositor_update.size.unwrap_or(window.inner_size());
+                        logical_to_physical_rounded(window_size, scale_factor)
                     });
+
+                    // Stash the old window size.
+                    let old_physical_size = physical_size;
+
+                    sticky_exit_callback(
+                        Event::WindowEvent {
+                            window_id: crate::window::WindowId(window_id),
+                            event: WindowEvent::ScaleFactorChanged {
+                                scale_factor,
+                                new_inner_size: &mut physical_size,
+                            },
+                        },
+                        &self.window_target,
+                        &mut control_flow,
+                        &mut callback,
+                    );
+
+                    let new_logical_size = physical_size.to_logical(scale_factor);
+
+                    // Resize the window when user altered the size.
+                    if old_physical_size != physical_size {
+                        self.with_state(|state| {
+                            let windows = state.windows.get_mut();
+                            let mut window = windows.get(&window_id).unwrap().lock().unwrap();
+                            window.resize(new_logical_size);
+                        });
+                    }
+
+                    // Make it queue resize.
+                    compositor_update.size = Some(new_logical_size);
                 }
 
-                // Make it queue resize.
-                compositor_update.size = Some(new_logical_size);
+                if let Some(size) = compositor_update.size.take() {
+                    let physical_size = self.with_state(|state| {
+                        let windows = state.windows.get_mut();
+                        let window = windows.get(&window_id).unwrap().lock().unwrap();
+
+                        let scale_factor = window.scale_factor();
+                        let physical_size = logical_to_physical_rounded(size, scale_factor);
+
+                        // TODO could probably bring back size reporting optimization.
+
+                        // Mark the window as needed a redraw.
+                        state
+                            .window_requests
+                            .get_mut()
+                            .get_mut(&window_id)
+                            .unwrap()
+                            .redraw_requested
+                            .store(true, Ordering::Relaxed);
+
+                        physical_size
+                    });
+
+                    sticky_exit_callback(
+                        Event::WindowEvent {
+                            window_id: crate::window::WindowId(window_id),
+                            event: WindowEvent::Resized(physical_size),
+                        },
+                        &self.window_target,
+                        &mut control_flow,
+                        &mut callback,
+                    );
+                }
+
+                if compositor_update.close_window {
+                    sticky_exit_callback(
+                        Event::WindowEvent {
+                            window_id: crate::window::WindowId(window_id),
+                            event: WindowEvent::CloseRequested,
+                        },
+                        &self.window_target,
+                        &mut control_flow,
+                        &mut callback,
+                    );
+                }
             }
 
-            if let Some(size) = compositor_update.size.take() {
-                let physical_size = self.with_state(|state| {
-                    let windows = state.windows.get_mut();
-                    let window = windows.get(&window_id).unwrap().lock().unwrap();
-
-                    let scale_factor = window.scale_factor();
-                    let physical_size = logical_to_physical_rounded(size, scale_factor);
-
-                    // TODO could probably bring back size reporting optimization.
-
-                    // Mark the window as needed a redraw.
-                    state
-                        .window_requests
-                        .get_mut()
-                        .get_mut(&window_id)
-                        .unwrap()
-                        .redraw_requested
-                        .store(true, Ordering::Relaxed);
-
-                    physical_size
-                });
-
-                callback(
-                    Event::WindowEvent {
-                        window_id: crate::window::WindowId(window_id),
-                        event: WindowEvent::Resized(physical_size),
-                    },
-                    &self.window_target,
-                );
+            // Push the events directly from the window.
+            self.with_state(|state| {
+                buffer_sink.append(&mut state.window_events_sink.lock().unwrap());
+            });
+            for event in buffer_sink.drain() {
+                let event = event.map_nonuser_event().unwrap();
+                sticky_exit_callback(event, &self.window_target, &mut control_flow, &mut callback);
             }
 
-            if compositor_update.close_window {
-                callback(
-                    Event::WindowEvent {
-                        window_id: crate::window::WindowId(window_id),
-                        event: WindowEvent::CloseRequested,
-                    },
-                    &self.window_target,
-                );
+            // Handle non-synthetic events.
+            self.with_state(|state| {
+                buffer_sink.append(&mut state.events_sink);
+            });
+            for event in buffer_sink.drain() {
+                let event = event.map_nonuser_event().unwrap();
+                sticky_exit_callback(event, &self.window_target, &mut control_flow, &mut callback);
             }
-        }
 
-        // Push the events directly from the window.
-        self.with_state(|state| {
-            buffer_sink.append(&mut state.window_events_sink.lock().unwrap());
-        });
-        for event in buffer_sink.drain() {
-            let event = event.map_nonuser_event().unwrap();
-            callback(event, &self.window_target);
-        }
+            // Send events cleared.
+            sticky_exit_callback(
+                Event::MainEventsCleared,
+                &self.window_target,
+                &mut control_flow,
+                &mut callback,
+            );
 
-        // Handle non-synthetic events.
-        self.with_state(|state| {
-            buffer_sink.append(&mut state.events_sink);
-        });
-        for event in buffer_sink.drain() {
-            let event = event.map_nonuser_event().unwrap();
-            callback(event, &self.window_target);
-        }
+            // Collect the window ids
+            self.with_state(|state| {
+                window_ids.extend(state.window_requests.get_mut().keys());
+            });
 
-        // Collect the window ids
-        self.with_state(|state| {
-            window_ids.extend(state.window_requests.get_mut().keys());
-        });
-
-        for window_id in window_ids.drain(..) {
-            let request_redraw = self.with_state(|state| {
-                let window_requests = state.window_requests.get_mut();
-                if window_requests.get(&window_id).unwrap().take_closed() {
-                    mem::drop(window_requests.remove(&window_id));
-                    mem::drop(state.windows.get_mut().remove(&window_id));
-                    false
-                } else {
-                    let mut window = state
-                        .windows
-                        .get_mut()
-                        .get_mut(&window_id)
-                        .unwrap()
-                        .lock()
-                        .unwrap();
-
-                    if window.frame_callback_state() == FrameCallbackState::Requested {
+            for window_id in window_ids.drain(..) {
+                let request_redraw = self.with_state(|state| {
+                    let window_requests = state.window_requests.get_mut();
+                    if window_requests.get(&window_id).unwrap().take_closed() {
+                        mem::drop(window_requests.remove(&window_id));
+                        mem::drop(state.windows.get_mut().remove(&window_id));
                         false
                     } else {
-                        // Reset the frame callbacks state.
-                        window.frame_callback_reset();
                         let mut redraw_requested = window_requests
                             .get(&window_id)
                             .unwrap()
                             .take_redraw_requested();
 
-                        // Redraw the frame while at it.
-                        redraw_requested |= window.refresh_frame();
+                        // Redraw the frames while at it.
+                        redraw_requested |= state
+                            .windows
+                            .get_mut()
+                            .get_mut(&window_id)
+                            .unwrap()
+                            .lock()
+                            .unwrap()
+                            .refresh_frame();
 
                         redraw_requested
                     }
+                });
+
+                if request_redraw {
+                    sticky_exit_callback(
+                        Event::RedrawRequested(crate::window::WindowId(window_id)),
+                        &self.window_target,
+                        &mut control_flow,
+                        &mut callback,
+                    );
                 }
-            });
-
-            if request_redraw {
-                callback(
-                    Event::WindowEvent {
-                        window_id: crate::window::WindowId(window_id),
-                        event: WindowEvent::RedrawRequested,
-                    },
-                    &self.window_target,
-                );
             }
-        }
 
-        // Reset the hint that we've dispatched events.
-        self.with_state(|state| {
-            state.dispatched_events = false;
-        });
+            // Send RedrawEventCleared.
+            sticky_exit_callback(
+                Event::RedrawEventsCleared,
+                &self.window_target,
+                &mut control_flow,
+                &mut callback,
+            );
+        };
 
-        // This is always the last event we dispatch before poll again
-        callback(Event::AboutToWait, &self.window_target);
-
-        std::mem::swap(&mut self.compositor_updates, &mut compositor_updates);
-        std::mem::swap(&mut self.buffer_sink, &mut buffer_sink);
-        std::mem::swap(&mut self.window_ids, &mut window_ids);
+        callback(Event::LoopDestroyed, &self.window_target, &mut control_flow);
+        exit_code
     }
 
     #[inline]
@@ -555,38 +486,6 @@ impl<T: 'static> EventLoop<T> {
             error.into()
         })
     }
-
-    fn roundtrip(&mut self) -> Result<usize, RootOsError> {
-        let state = match &mut self.window_target.p {
-            PlatformEventLoopWindowTarget::Wayland(window_target) => window_target.state.get_mut(),
-            #[cfg(feature = "x11")]
-            _ => unreachable!(),
-        };
-
-        let mut wayland_source = self.wayland_dispatcher.as_source_mut();
-        let event_queue = wayland_source.queue();
-        event_queue.roundtrip(state).map_err(|error| {
-            os_error!(OsError::WaylandError(Arc::new(WaylandError::Dispatch(
-                error
-            ))))
-        })
-    }
-
-    fn control_flow(&self) -> ControlFlow {
-        self.window_target.p.control_flow()
-    }
-
-    fn exiting(&self) -> bool {
-        self.window_target.p.exiting()
-    }
-
-    fn set_exit_code(&self, code: i32) {
-        self.window_target.p.set_exit_code(code)
-    }
-
-    fn exit_code(&self) -> Option<i32> {
-        self.window_target.p.exit_code()
-    }
 }
 
 pub struct EventLoopWindowTarget<T> {
@@ -596,12 +495,6 @@ pub struct EventLoopWindowTarget<T> {
     /// The main queue used by the event loop.
     pub queue_handle: QueueHandle<WinitState>,
 
-    /// The application's latest control_flow state
-    pub(crate) control_flow: Cell<ControlFlow>,
-
-    /// The application's exit state.
-    pub(crate) exit: Cell<Option<i32>>,
-
     // TODO remove that RefCell once we can pass `&mut` in `Window::new`.
     /// Winit state.
     pub state: RefCell<WinitState>,
@@ -616,31 +509,10 @@ pub struct EventLoopWindowTarget<T> {
 }
 
 impl<T> EventLoopWindowTarget<T> {
-    #[inline]
-    pub fn listen_device_events(&self, _allowed: DeviceEvents) {}
-
-    #[cfg(feature = "rwh_05")]
-    #[inline]
-    pub fn raw_display_handle_rwh_05(&self) -> rwh_05::RawDisplayHandle {
-        use sctk::reexports::client::Proxy;
-
-        let mut display_handle = rwh_05::WaylandDisplayHandle::empty();
+    pub fn raw_display_handle(&self) -> RawDisplayHandle {
+        let mut display_handle = WaylandDisplayHandle::empty();
         display_handle.display = self.connection.display().id().as_ptr() as *mut _;
-        rwh_05::RawDisplayHandle::Wayland(display_handle)
-    }
-
-    #[cfg(feature = "rwh_06")]
-    #[inline]
-    pub fn raw_display_handle_rwh_06(
-        &self,
-    ) -> Result<rwh_06::RawDisplayHandle, rwh_06::HandleError> {
-        use sctk::reexports::client::Proxy;
-
-        Ok(rwh_06::WaylandDisplayHandle::new({
-            let ptr = self.connection.display().id().as_ptr();
-            std::ptr::NonNull::new(ptr as *mut _).expect("wl_display should never be null")
-        })
-        .into())
+        RawDisplayHandle::Wayland(display_handle)
     }
 }
 

src/platform_impl/linux/wayland/event_loop/sink.rs

@@ -12,7 +12,7 @@ use super::{DeviceId, WindowId};
 /// to the winit's user.
 #[derive(Default)]
 pub struct EventSink {
-    pub window_events: Vec<Event<()>>,
+    pub window_events: Vec<Event<'static, ()>>,
 }
 
 impl EventSink {
@@ -20,12 +20,6 @@ impl EventSink {
         Default::default()
     }
 
-    /// Return `true` if there're pending events.
-    #[inline]
-    pub fn is_empty(&self) -> bool {
-        self.window_events.is_empty()
-    }
-
     /// Add new device event to a queue.
     #[inline]
     pub fn push_device_event(&mut self, event: DeviceEvent, device_id: DeviceId) {
@@ -37,7 +31,7 @@ impl EventSink {
 
     /// Add new window event to a queue.
     #[inline]
-    pub fn push_window_event(&mut self, event: WindowEvent, window_id: WindowId) {
+    pub fn push_window_event(&mut self, event: WindowEvent<'static>, window_id: WindowId) {
         self.window_events.push(Event::WindowEvent {
             event,
             window_id: RootWindowId(window_id),
@@ -50,7 +44,7 @@ impl EventSink {
     }
 
     #[inline]
-    pub fn drain(&mut self) -> Drain<'_, Event<()>> {
+    pub fn drain(&mut self) -> Drain<'_, Event<'static, ()>> {
         self.window_events.drain(..)
     }
 }

src/platform_impl/linux/wayland/mod.rs

@@ -2,14 +2,10 @@
 
 //! Winit's Wayland backend.
 
-use std::fmt::Display;
-use std::sync::Arc;
-
-use sctk::reexports::client::globals::{BindError, GlobalError};
 use sctk::reexports::client::protocol::wl_surface::WlSurface;
-use sctk::reexports::client::{self, ConnectError, DispatchError, Proxy};
+use sctk::reexports::client::Proxy;
 
-pub use crate::platform_impl::platform::{OsError, WindowId};
+pub use crate::platform_impl::platform::WindowId;
 pub use event_loop::{EventLoop, EventLoopProxy, EventLoopWindowTarget};
 pub use output::{MonitorHandle, VideoMode};
 pub use window::Window;
@@ -21,46 +17,6 @@ mod state;
 mod types;
 mod window;
 
-#[derive(Debug)]
-pub enum WaylandError {
-    /// Error connecting to the socket.
-    Connection(ConnectError),
-
-    /// Error binding the global.
-    Global(GlobalError),
-
-    // Bind error.
-    Bind(BindError),
-
-    /// Error during the dispatching the event queue.
-    Dispatch(DispatchError),
-
-    /// Calloop error.
-    Calloop(calloop::Error),
-
-    /// Wayland
-    Wire(client::backend::WaylandError),
-}
-
-impl Display for WaylandError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            WaylandError::Connection(error) => error.fmt(f),
-            WaylandError::Global(error) => error.fmt(f),
-            WaylandError::Bind(error) => error.fmt(f),
-            WaylandError::Dispatch(error) => error.fmt(f),
-            WaylandError::Calloop(error) => error.fmt(f),
-            WaylandError::Wire(error) => error.fmt(f),
-        }
-    }
-}
-
-impl From<WaylandError> for OsError {
-    fn from(value: WaylandError) -> Self {
-        Self::WaylandError(Arc::new(value))
-    }
-}
-
 /// Dummy device id, since Wayland doesn't have device events.
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId;

src/platform_impl/linux/wayland/output.rs

@@ -3,51 +3,29 @@ use sctk::reexports::client::Proxy;
 
 use sctk::output::OutputData;
 
-use crate::dpi::{LogicalPosition, PhysicalPosition, PhysicalSize};
-use crate::event_loop::ControlFlow;
-use crate::platform_impl::platform::VideoMode as PlatformVideoMode;
+use crate::dpi::{PhysicalPosition, PhysicalSize};
+use crate::platform_impl::platform::{
+    MonitorHandle as PlatformMonitorHandle, VideoMode as PlatformVideoMode,
+};
 
 use super::event_loop::EventLoopWindowTarget;
 
 impl<T> EventLoopWindowTarget<T> {
     #[inline]
-    pub fn available_monitors(&self) -> impl Iterator<Item = MonitorHandle> {
+    pub fn available_monitors(&self) -> Vec<MonitorHandle> {
         self.state
             .borrow()
             .output_state
             .outputs()
             .map(MonitorHandle::new)
+            .collect()
     }
 
     #[inline]
-    pub fn primary_monitor(&self) -> Option<MonitorHandle> {
+    pub fn primary_monitor(&self) -> Option<PlatformMonitorHandle> {
         // There's no primary monitor on Wayland.
         None
     }
-
-    pub(crate) fn set_control_flow(&self, control_flow: ControlFlow) {
-        self.control_flow.set(control_flow)
-    }
-
-    pub(crate) fn control_flow(&self) -> ControlFlow {
-        self.control_flow.get()
-    }
-
-    pub(crate) fn exit(&self) {
-        self.exit.set(Some(0))
-    }
-
-    pub(crate) fn exiting(&self) -> bool {
-        self.exit.get().is_some()
-    }
-
-    pub(crate) fn set_exit_code(&self, code: i32) {
-        self.exit.set(Some(code))
-    }
-
-    pub(crate) fn exit_code(&self) -> Option<i32> {
-        self.exit.get()
-    }
 }
 
 #[derive(Clone, Debug)]
@@ -92,18 +70,7 @@ impl MonitorHandle {
     #[inline]
     pub fn position(&self) -> PhysicalPosition<i32> {
         let output_data = self.proxy.data::<OutputData>().unwrap();
-        output_data.with_output_info(|info| {
-            info.logical_position.map_or_else(
-                || {
-                    LogicalPosition::<i32>::from(info.location)
-                        .to_physical(info.scale_factor as f64)
-                },
-                |logical_position| {
-                    LogicalPosition::<i32>::from(logical_position)
-                        .to_physical(info.scale_factor as f64)
-                },
-            )
-        })
+        output_data.with_output_info(|info| info.location).into()
     }
 
     #[inline]
@@ -190,7 +157,7 @@ impl VideoMode {
         self.refresh_rate_millihertz
     }
 
-    pub fn monitor(&self) -> MonitorHandle {
-        self.monitor.clone()
+    pub fn monitor(&self) -> PlatformMonitorHandle {
+        PlatformMonitorHandle::Wayland(self.monitor.clone())
     }
 }

src/platform_impl/linux/wayland/seat/keyboard/mod.rs

@@ -67,11 +67,7 @@ impl Dispatch<WlKeyboard, KeyboardData, WinitState> for WinitState {
                 };
 
                 // Drop the repeat, if there were any.
-                let keyboard_state = seat_state.keyboard_state.as_mut().unwrap();
-                keyboard_state.current_repeat = None;
-                if let Some(token) = keyboard_state.repeat_token.take() {
-                    keyboard_state.loop_handle.remove(token);
-                }
+                seat_state.keyboard_state.as_mut().unwrap().current_repeat = None;
 
                 // The keyboard focus is considered as general focus.
                 state
@@ -93,11 +89,7 @@ impl Dispatch<WlKeyboard, KeyboardData, WinitState> for WinitState {
 
                 // NOTE: we should drop the repeat regardless whethere it was for the present
                 // window of for the window which just went gone.
-                let keyboard_state = seat_state.keyboard_state.as_mut().unwrap();
-                keyboard_state.current_repeat = None;
-                if let Some(token) = keyboard_state.repeat_token.take() {
-                    keyboard_state.loop_handle.remove(token);
-                }
+                seat_state.keyboard_state.as_mut().unwrap().current_repeat = None;
 
                 // NOTE: The check whether the window exists is essential as we might get a
                 // nil surface, regardless of what protocol says.
@@ -122,9 +114,9 @@ impl Dispatch<WlKeyboard, KeyboardData, WinitState> for WinitState {
             }
             WlKeyboardEvent::Key {
                 key,
-                state: WEnum::Value(WlKeyState::Pressed),
+                state: key_state,
                 ..
-            } => {
+            } if key_state == WEnum::Value(WlKeyState::Pressed) => {
                 let key = key + 8;
 
                 key_input(
@@ -159,9 +151,6 @@ impl Dispatch<WlKeyboard, KeyboardData, WinitState> for WinitState {
                 keyboard_state.repeat_token = keyboard_state
                     .loop_handle
                     .insert_source(timer, move |_, _, state| {
-                        // Required to handle the wakeups from the repeat sources.
-                        state.dispatched_events = true;
-
                         let data = wl_keyboard.data::<KeyboardData>().unwrap();
                         let seat_state = state.seats.get_mut(&data.seat.id()).unwrap();
 
@@ -192,9 +181,9 @@ impl Dispatch<WlKeyboard, KeyboardData, WinitState> for WinitState {
             }
             WlKeyboardEvent::Key {
                 key,
-                state: WEnum::Value(WlKeyState::Released),
+                state: key_state,
                 ..
-            } => {
+            } if key_state == WEnum::Value(WlKeyState::Released) => {
                 let key = key + 8;
 
                 key_input(
@@ -212,9 +201,6 @@ impl Dispatch<WlKeyboard, KeyboardData, WinitState> for WinitState {
                     && Some(key) == keyboard_state.current_repeat
                 {
                     keyboard_state.current_repeat = None;
-                    if let Some(token) = keyboard_state.repeat_token.take() {
-                        keyboard_state.loop_handle.remove(token);
-                    }
                 }
             }
             WlKeyboardEvent::Modifiers {

src/platform_impl/linux/wayland/seat/mod.rs

@@ -2,7 +2,7 @@
 
 use std::sync::Arc;
 
-use ahash::AHashMap;
+use fnv::FnvHashMap;
 
 use sctk::reexports::client::protocol::wl_seat::WlSeat;
 use sctk::reexports::client::protocol::wl_touch::WlTouch;
@@ -29,7 +29,7 @@ use keyboard::{KeyboardData, KeyboardState};
 use text_input::TextInputData;
 use touch::TouchPoint;
 
-#[derive(Debug, Default)]
+#[derive(Debug)]
 pub struct WinitSeatState {
     /// The pointer bound on the seat.
     pointer: Option<Arc<ThemedPointer<WinitPointerData>>>,
@@ -38,7 +38,7 @@ pub struct WinitSeatState {
     touch: Option<WlTouch>,
 
     /// The mapping from touched points to the surfaces they're present.
-    touch_map: AHashMap<i32, TouchPoint>,
+    touch_map: FnvHashMap<i32, TouchPoint>,
 
     /// The text input bound on the seat.
     text_input: Option<Arc<ZwpTextInputV3>>,
@@ -58,7 +58,16 @@ pub struct WinitSeatState {
 
 impl WinitSeatState {
     pub fn new() -> Self {
-        Default::default()
+        Self {
+            pointer: None,
+            touch: None,
+            relative_pointer: None,
+            text_input: None,
+            touch_map: Default::default(),
+            keyboard_state: None,
+            modifiers: ModifiersState::empty(),
+            modifiers_pending: false,
+        }
     }
 }
 
@@ -88,14 +97,12 @@ impl SeatHandler for WinitState {
             SeatCapability::Pointer if seat_state.pointer.is_none() => {
                 let surface = self.compositor_state.create_surface(queue_handle);
                 let surface_id = surface.id();
-                let pointer_data = WinitPointerData::new(seat.clone());
+                let pointer_data = WinitPointerData::new(seat.clone(), surface);
                 let themed_pointer = self
                     .seat_state
                     .get_pointer_with_theme_and_data(
                         queue_handle,
                         &seat,
-                        self.shm.wl_shm(),
-                        surface,
                         ThemeSpec::System,
                         pointer_data,
                     )
@@ -160,7 +167,7 @@ impl SeatHandler for WinitState {
                     let pointer_data = pointer.pointer().winit_data();
 
                     // Remove the cursor from the mapping.
-                    let surface_id = pointer.surface().id();
+                    let surface_id = pointer_data.cursor_surface().id();
                     let _ = self.pointer_surfaces.remove(&surface_id);
 
                     // Remove the inner locks/confines before dropping the pointer.

src/platform_impl/linux/wayland/seat/pointer/mod.rs

@@ -2,7 +2,6 @@
 
 use std::ops::Deref;
 use std::sync::{Arc, Mutex};
-use std::time::Duration;
 
 use sctk::reexports::client::delegate_dispatch;
 use sctk::reexports::client::protocol::wl_pointer::WlPointer;
@@ -11,17 +10,15 @@ use sctk::reexports::client::protocol::wl_surface::WlSurface;
 use sctk::reexports::client::{Connection, Proxy, QueueHandle, Dispatch};
 use sctk::reexports::protocols::wp::pointer_constraints::zv1::client::zwp_confined_pointer_v1::ZwpConfinedPointerV1;
 use sctk::reexports::protocols::wp::pointer_constraints::zv1::client::zwp_locked_pointer_v1::ZwpLockedPointerV1;
-use sctk::reexports::protocols::wp::cursor_shape::v1::client::wp_cursor_shape_device_v1::WpCursorShapeDeviceV1;
-use sctk::reexports::protocols::wp::cursor_shape::v1::client::wp_cursor_shape_manager_v1::WpCursorShapeManagerV1;
 use sctk::reexports::protocols::wp::pointer_constraints::zv1::client::zwp_pointer_constraints_v1::{Lifetime, ZwpPointerConstraintsV1};
 use sctk::reexports::client::globals::{BindError, GlobalList};
-use sctk::reexports::csd_frame::FrameClick;
 
 use sctk::compositor::SurfaceData;
 use sctk::globals::GlobalData;
 use sctk::seat::pointer::{PointerData, PointerDataExt};
 use sctk::seat::pointer::{PointerEvent, PointerEventKind, PointerHandler};
 use sctk::seat::SeatState;
+use sctk::shell::xdg::frame::FrameClick;
 
 use crate::dpi::{LogicalPosition, PhysicalPosition};
 use crate::event::{ElementState, MouseButton, MouseScrollDelta, TouchPhase, WindowEvent};
@@ -70,31 +67,35 @@ impl PointerHandler for WinitState {
                 PointerEventKind::Enter { .. } | PointerEventKind::Motion { .. }
                     if parent_surface != surface =>
                 {
-                    if let Some(icon) = window.frame_point_moved(
-                        seat,
-                        surface,
-                        Duration::ZERO,
-                        event.position.0,
-                        event.position.1,
-                    ) {
+                    if let Some(icon) =
+                        window.frame_point_moved(surface, event.position.0, event.position.1)
+                    {
                         if let Some(pointer) = seat_state.pointer.as_ref() {
-                            let _ = pointer.set_cursor(connection, icon);
+                            let surface = pointer
+                                .pointer()
+                                .data::<WinitPointerData>()
+                                .unwrap()
+                                .cursor_surface();
+                            let scale_factor =
+                                surface.data::<SurfaceData>().unwrap().scale_factor();
+
+                            let _ = pointer.set_cursor(
+                                connection,
+                                icon,
+                                self.shm.wl_shm(),
+                                surface,
+                                scale_factor,
+                            );
                         }
                     }
                 }
                 PointerEventKind::Leave { .. } if parent_surface != surface => {
                     window.frame_point_left();
                 }
-                ref kind @ PointerEventKind::Press {
-                    button,
-                    serial,
-                    time,
-                }
-                | ref kind @ PointerEventKind::Release {
-                    button,
-                    serial,
-                    time,
-                } if parent_surface != surface => {
+                ref kind @ PointerEventKind::Press { button, serial, .. }
+                | ref kind @ PointerEventKind::Release { button, serial, .. }
+                    if parent_surface != surface =>
+                {
                     let click = match wayland_button_to_winit(button) {
                         MouseButton::Left => FrameClick::Normal,
                         MouseButton::Right => FrameClick::Alternate,
@@ -108,7 +109,6 @@ impl PointerHandler for WinitState {
                         pressed,
                         seat,
                         serial,
-                        Duration::from_millis(time as u64),
                         window_id,
                         &mut self.window_compositor_updates,
                     );
@@ -238,6 +238,9 @@ impl PointerHandler for WinitState {
 
 #[derive(Debug)]
 pub struct WinitPointerData {
+    /// The surface associated with this pointer, which is used for icons.
+    cursor_surface: WlSurface,
+
     /// The inner winit data associated with the pointer.
     inner: Mutex<WinitPointerDataInner>,
 
@@ -246,8 +249,9 @@ pub struct WinitPointerData {
 }
 
 impl WinitPointerData {
-    pub fn new(seat: WlSeat) -> Self {
+    pub fn new(seat: WlSeat, surface: WlSurface) -> Self {
         Self {
+            cursor_surface: surface,
             inner: Mutex::new(WinitPointerDataInner::default()),
             sctk_data: PointerData::new(seat),
         }
@@ -309,6 +313,11 @@ impl WinitPointerData {
         self.sctk_data.seat()
     }
 
+    /// The WlSurface used to set cursor theme.
+    pub fn cursor_surface(&self) -> &WlSurface {
+        &self.cursor_surface
+    }
+
     /// Active window.
     pub fn focused_window(&self) -> Option<WindowId> {
         self.inner.lock().unwrap().surface
@@ -316,7 +325,7 @@ impl WinitPointerData {
 
     /// Last button serial.
     pub fn latest_button_serial(&self) -> u32 {
-        self.sctk_data.latest_button_serial().unwrap_or_default()
+        self.inner.lock().unwrap().latest_button_serial
     }
 
     /// Last enter serial.
@@ -332,6 +341,12 @@ impl WinitPointerData {
     }
 }
 
+impl Drop for WinitPointerData {
+    fn drop(&mut self) {
+        self.cursor_surface.destroy();
+    }
+}
+
 impl PointerDataExt for WinitPointerData {
     fn pointer_data(&self) -> &PointerData {
         &self.sctk_data
@@ -471,35 +486,7 @@ impl Dispatch<ZwpConfinedPointerV1, GlobalData, WinitState> for PointerConstrain
     }
 }
 
-impl Dispatch<WpCursorShapeDeviceV1, GlobalData, WinitState> for SeatState {
-    fn event(
-        _: &mut WinitState,
-        _: &WpCursorShapeDeviceV1,
-        _: <WpCursorShapeDeviceV1 as Proxy>::Event,
-        _: &GlobalData,
-        _: &Connection,
-        _: &QueueHandle<WinitState>,
-    ) {
-        unreachable!("wp_cursor_shape_manager has no events")
-    }
-}
-
-impl Dispatch<WpCursorShapeManagerV1, GlobalData, WinitState> for SeatState {
-    fn event(
-        _: &mut WinitState,
-        _: &WpCursorShapeManagerV1,
-        _: <WpCursorShapeManagerV1 as Proxy>::Event,
-        _: &GlobalData,
-        _: &Connection,
-        _: &QueueHandle<WinitState>,
-    ) {
-        unreachable!("wp_cursor_device_manager has no events")
-    }
-}
-
 delegate_dispatch!(WinitState: [ WlPointer: WinitPointerData] => SeatState);
-delegate_dispatch!(WinitState: [ WpCursorShapeManagerV1: GlobalData] => SeatState);
-delegate_dispatch!(WinitState: [ WpCursorShapeDeviceV1: GlobalData] => SeatState);
 delegate_dispatch!(WinitState: [ZwpPointerConstraintsV1: GlobalData] => PointerConstraintsState);
 delegate_dispatch!(WinitState: [ZwpLockedPointerV1: GlobalData] => PointerConstraintsState);
 delegate_dispatch!(WinitState: [ZwpConfinedPointerV1: GlobalData] => PointerConstraintsState);

src/platform_impl/linux/wayland/seat/touch/mod.rs

@@ -121,7 +121,7 @@ impl TouchHandler for WinitState {
                 device_id: crate::event::DeviceId(crate::platform_impl::DeviceId::Wayland(
                     DeviceId,
                 )),
-                phase: TouchPhase::Moved,
+                phase: TouchPhase::Cancelled,
                 location: touch_point.location.to_physical(scale_factor),
                 force: None,
                 id: id as u64,

src/platform_impl/linux/wayland/state.rs

@@ -1,8 +1,8 @@
 use std::cell::RefCell;
-use std::sync::atomic::Ordering;
+use std::error::Error;
 use std::sync::{Arc, Mutex};
 
-use ahash::AHashMap;
+use fnv::FnvHashMap;
 
 use sctk::reexports::calloop::LoopHandle;
 use sctk::reexports::client::backend::ObjectId;
@@ -23,7 +23,6 @@ use sctk::shm::{Shm, ShmHandler};
 use sctk::subcompositor::SubcompositorState;
 
 use crate::dpi::LogicalSize;
-use crate::platform_impl::OsError;
 
 use super::event_loop::sink::EventSink;
 use super::output::MonitorHandle;
@@ -31,12 +30,11 @@ use super::seat::{
     PointerConstraintsState, RelativePointerState, TextInputState, WinitPointerData,
     WinitPointerDataExt, WinitSeatState,
 };
-use super::types::kwin_blur::KWinBlurManager;
 use super::types::wp_fractional_scaling::FractionalScalingManager;
 use super::types::wp_viewporter::ViewporterState;
 use super::types::xdg_activation::XdgActivationState;
 use super::window::{WindowRequests, WindowState};
-use super::{WaylandError, WindowId};
+use super::WindowId;
 
 /// Winit's Wayland state.
 pub struct WinitState {
@@ -62,10 +60,10 @@ pub struct WinitState {
     pub xdg_shell: XdgShell,
 
     /// The currently present windows.
-    pub windows: RefCell<AHashMap<WindowId, Arc<Mutex<WindowState>>>>,
+    pub windows: RefCell<FnvHashMap<WindowId, Arc<Mutex<WindowState>>>>,
 
     /// The requests from the `Window` to EventLoop, such as close operations and redraw requests.
-    pub window_requests: RefCell<AHashMap<WindowId, Arc<WindowRequests>>>,
+    pub window_requests: RefCell<FnvHashMap<WindowId, Arc<WindowRequests>>>,
 
     /// The events that were generated directly from the window.
     pub window_events_sink: Arc<Mutex<EventSink>>,
@@ -74,10 +72,10 @@ pub struct WinitState {
     pub window_compositor_updates: Vec<WindowCompositorUpdate>,
 
     /// Currently handled seats.
-    pub seats: AHashMap<ObjectId, WinitSeatState>,
+    pub seats: FnvHashMap<ObjectId, WinitSeatState>,
 
     /// Currently present cursor surfaces.
-    pub pointer_surfaces: AHashMap<ObjectId, Arc<ThemedPointer<WinitPointerData>>>,
+    pub pointer_surfaces: FnvHashMap<ObjectId, Arc<ThemedPointer<WinitPointerData>>>,
 
     /// The state of the text input on the client.
     pub text_input_state: Option<TextInputState>,
@@ -104,15 +102,8 @@ pub struct WinitState {
     /// Fractional scaling manager.
     pub fractional_scaling_manager: Option<FractionalScalingManager>,
 
-    /// KWin blur manager.
-    pub kwin_blur_manager: Option<KWinBlurManager>,
-
     /// Loop handle to re-register event sources, such as keyboard repeat.
     pub loop_handle: LoopHandle<'static, Self>,
-
-    /// Whether we have dispatched events to the user thus we want to
-    /// send `AboutToWait` and normally wakeup the user.
-    pub dispatched_events: bool,
 }
 
 impl WinitState {
@@ -120,23 +111,21 @@ impl WinitState {
         globals: &GlobalList,
         queue_handle: &QueueHandle<Self>,
         loop_handle: LoopHandle<'static, WinitState>,
-    ) -> Result<Self, OsError> {
+    ) -> Result<Self, Box<dyn Error>> {
         let registry_state = RegistryState::new(globals);
-        let compositor_state =
-            CompositorState::bind(globals, queue_handle).map_err(WaylandError::Bind)?;
+        let compositor_state = CompositorState::bind(globals, queue_handle)?;
         let subcompositor_state = SubcompositorState::bind(
             compositor_state.wl_compositor().clone(),
             globals,
             queue_handle,
-        )
-        .map_err(WaylandError::Bind)?;
+        )?;
 
         let output_state = OutputState::new(globals, queue_handle);
         let monitors = output_state.outputs().map(MonitorHandle::new).collect();
 
         let seat_state = SeatState::new(globals, queue_handle);
 
-        let mut seats = AHashMap::default();
+        let mut seats = FnvHashMap::default();
         for seat in seat_state.seats() {
             seats.insert(seat.id(), WinitSeatState::new());
         }
@@ -154,9 +143,9 @@ impl WinitState {
             subcompositor_state: Arc::new(subcompositor_state),
             output_state,
             seat_state,
-            shm: Shm::bind(globals, queue_handle).map_err(WaylandError::Bind)?,
+            shm: Shm::bind(globals, queue_handle)?,
 
-            xdg_shell: XdgShell::bind(globals, queue_handle).map_err(WaylandError::Bind)?,
+            xdg_shell: XdgShell::bind(globals, queue_handle)?,
             xdg_activation: XdgActivationState::bind(globals, queue_handle).ok(),
 
             windows: Default::default(),
@@ -165,7 +154,6 @@ impl WinitState {
             window_events_sink: Default::default(),
             viewporter_state,
             fractional_scaling_manager,
-            kwin_blur_manager: KWinBlurManager::new(globals, queue_handle).ok(),
 
             seats,
             text_input_state: TextInputState::new(globals, queue_handle).ok(),
@@ -179,8 +167,6 @@ impl WinitState {
             monitors: Arc::new(Mutex::new(monitors)),
             events_sink: EventSink::new(),
             loop_handle,
-            // Make it true by default.
-            dispatched_events: true,
         })
     }
 
@@ -287,12 +273,7 @@ impl WindowHandler for WinitState {
             .expect("got configure for dead window.")
             .lock()
             .unwrap()
-            .configure(
-                configure,
-                &self.shm,
-                &self.subcompositor_state,
-                &mut self.events_sink,
-            );
+            .configure(configure, &self.shm, &self.subcompositor_state);
 
         self.window_compositor_updates[pos].size = Some(new_size);
     }
@@ -330,16 +311,6 @@ impl OutputHandler for WinitState {
 }
 
 impl CompositorHandler for WinitState {
-    fn transform_changed(
-        &mut self,
-        _: &Connection,
-        _: &QueueHandle<Self>,
-        _: &wayland_client::protocol::wl_surface::WlSurface,
-        _: wayland_client::protocol::wl_output::Transform,
-    ) {
-        // TODO(kchibisov) we need to expose it somehow in winit.
-    }
-
     fn scale_factor_changed(
         &mut self,
         _: &Connection,
@@ -350,27 +321,7 @@ impl CompositorHandler for WinitState {
         self.scale_factor_changed(surface, scale_factor as f64, true)
     }
 
-    fn frame(&mut self, _: &Connection, _: &QueueHandle<Self>, surface: &WlSurface, _: u32) {
-        let window_id = super::make_wid(surface);
-        let window = match self.windows.get_mut().get(&window_id) {
-            Some(window) => window,
-            None => return,
-        };
-
-        // In case we have a redraw requested we must indicate the wake up.
-        if self
-            .window_requests
-            .get_mut()
-            .get(&window_id)
-            .unwrap()
-            .redraw_requested
-            .load(Ordering::Relaxed)
-        {
-            self.dispatched_events = true;
-        }
-
-        window.lock().unwrap().frame_callback_received();
-    }
+    fn frame(&mut self, _: &Connection, _: &QueueHandle<Self>, _: &WlSurface, _: u32) {}
 }
 
 impl ProvidesRegistryState for WinitState {

src/platform_impl/linux/wayland/types/kwin_blur.rs

@@ -1,70 +0,0 @@
-//! Handling of KDE-compatible blur.
-
-use sctk::reexports::client::globals::{BindError, GlobalList};
-use sctk::reexports::client::protocol::wl_surface::WlSurface;
-use sctk::reexports::client::Dispatch;
-use sctk::reexports::client::{delegate_dispatch, Connection, Proxy, QueueHandle};
-use wayland_protocols_plasma::blur::client::{
-    org_kde_kwin_blur::OrgKdeKwinBlur, org_kde_kwin_blur_manager::OrgKdeKwinBlurManager,
-};
-
-use sctk::globals::GlobalData;
-
-use crate::platform_impl::wayland::state::WinitState;
-
-/// KWin blur manager.
-#[derive(Debug, Clone)]
-pub struct KWinBlurManager {
-    manager: OrgKdeKwinBlurManager,
-}
-
-impl KWinBlurManager {
-    pub fn new(
-        globals: &GlobalList,
-        queue_handle: &QueueHandle<WinitState>,
-    ) -> Result<Self, BindError> {
-        let manager = globals.bind(queue_handle, 1..=1, GlobalData)?;
-        Ok(Self { manager })
-    }
-
-    pub fn blur(
-        &self,
-        surface: &WlSurface,
-        queue_handle: &QueueHandle<WinitState>,
-    ) -> OrgKdeKwinBlur {
-        self.manager.create(surface, queue_handle, ())
-    }
-
-    pub fn unset(&self, surface: &WlSurface) {
-        self.manager.unset(surface)
-    }
-}
-
-impl Dispatch<OrgKdeKwinBlurManager, GlobalData, WinitState> for KWinBlurManager {
-    fn event(
-        _: &mut WinitState,
-        _: &OrgKdeKwinBlurManager,
-        _: <OrgKdeKwinBlurManager as Proxy>::Event,
-        _: &GlobalData,
-        _: &Connection,
-        _: &QueueHandle<WinitState>,
-    ) {
-        unreachable!("no events defined for org_kde_kwin_blur_manager");
-    }
-}
-
-impl Dispatch<OrgKdeKwinBlur, (), WinitState> for KWinBlurManager {
-    fn event(
-        _: &mut WinitState,
-        _: &OrgKdeKwinBlur,
-        _: <OrgKdeKwinBlur as Proxy>::Event,
-        _: &(),
-        _: &Connection,
-        _: &QueueHandle<WinitState>,
-    ) {
-        unreachable!("no events defined for org_kde_kwin_blur");
-    }
-}
-
-delegate_dispatch!(WinitState: [OrgKdeKwinBlurManager: GlobalData] => KWinBlurManager);
-delegate_dispatch!(WinitState: [OrgKdeKwinBlur: ()] => KWinBlurManager);

src/platform_impl/linux/wayland/types/mod.rs

@@ -1,6 +1,5 @@
 //! Wayland protocol implementation boilerplate.
 
-pub mod kwin_blur;
 pub mod wp_fractional_scaling;
 pub mod wp_viewporter;
 pub mod xdg_activation;

src/platform_impl/linux/wayland/types/xdg_activation.rs

@@ -16,10 +16,7 @@ use sctk::reexports::protocols::xdg::activation::v1::client::xdg_activation_v1::
 
 use sctk::globals::GlobalData;
 
-use crate::event_loop::AsyncRequestSerial;
 use crate::platform_impl::wayland::state::WinitState;
-use crate::platform_impl::WindowId;
-use crate::window::ActivationToken;
 
 pub struct XdgActivationState {
     xdg_activation: XdgActivationV1,
@@ -65,29 +62,16 @@ impl Dispatch<XdgActivationTokenV1, XdgActivationTokenData, WinitState> for XdgA
             _ => return,
         };
 
-        let global = state
+        state
             .xdg_activation
             .as_ref()
             .expect("got xdg_activation event without global.")
-            .global();
+            .global()
+            .activate(token, &data.surface);
 
-        match data {
-            XdgActivationTokenData::Attention((surface, fence)) => {
-                global.activate(token, surface);
-                // Mark that no request attention is in process.
-                if let Some(attention_requested) = fence.upgrade() {
-                    attention_requested.store(false, std::sync::atomic::Ordering::Relaxed);
-                }
-            }
-            XdgActivationTokenData::Obtain((window_id, serial)) => {
-                state.events_sink.push_window_event(
-                    crate::event::WindowEvent::ActivationTokenDone {
-                        serial: *serial,
-                        token: ActivationToken::_new(token),
-                    },
-                    *window_id,
-                );
-            }
+        // Mark that no request attention is in process.
+        if let Some(attention_requested) = data.attention_requested.upgrade() {
+            attention_requested.store(false, std::sync::atomic::Ordering::Relaxed);
         }
 
         proxy.destroy();
@@ -95,11 +79,24 @@ impl Dispatch<XdgActivationTokenV1, XdgActivationTokenData, WinitState> for XdgA
 }
 
 /// The data associated with the activation request.
-pub enum XdgActivationTokenData {
-    /// Request user attention for the given surface.
-    Attention((WlSurface, Weak<AtomicBool>)),
-    /// Get a token to be passed outside of the winit.
-    Obtain((WindowId, AsyncRequestSerial)),
+pub struct XdgActivationTokenData {
+    /// The surface we're raising.
+    surface: WlSurface,
+
+    /// Flag to throttle attention requests.
+    attention_requested: Weak<AtomicBool>,
+}
+
+impl XdgActivationTokenData {
+    /// Create a new data.
+    ///
+    /// The `attenteion_requested` is marked as `false` on complition.
+    pub fn new(surface: WlSurface, attention_requested: Weak<AtomicBool>) -> Self {
+        Self {
+            surface,
+            attention_requested,
+        }
+    }
 }
 
 delegate_dispatch!(WinitState: [ XdgActivationV1: GlobalData] => XdgActivationState);