dpi: add LogicalUnit, PhysicalUnit, and Unit

Part-off: https://github.com/rust-windowing/winit/issues/2395

.github/CODEOWNERS

@@ -1,12 +1,6 @@
-# Core maintainers:
-# - @msiglreith
-# - @kchibisov
-# - @madsmtm
-# - @maroider
-
 # Android
-/src/platform/android.rs            @msiglreith
-/src/platform_impl/android          @msiglreith
+/src/platform/android.rs            @msiglreith @MarijnS95
+/src/platform_impl/android          @msiglreith @MarijnS95
 
 # iOS
 /src/platform/ios.rs                @madsmtm
@@ -20,14 +14,14 @@
 /src/platform_impl/linux/wayland    @kchibisov
 
 # X11
-/src/platform/x11.rs                @kchibisov
-/src/platform_impl/linux/x11        @kchibisov
+/src/platform/x11.rs                @kchibisov @notgull
+/src/platform_impl/linux/x11        @kchibisov @notgull
 
 # macOS
 /src/platform/macos.rs              @madsmtm
 /src/platform_impl/macos            @madsmtm
 
-# Web (no maintainer)
+# Web
 /src/platform/web.rs                @daxpedda
 /src/platform_impl/web              @daxpedda
 

.github/workflows/ci.yml

@@ -17,6 +17,24 @@ jobs:
     - name: Check Formatting
       run: cargo fmt -- --check
 
+  typos:
+    name: Check for typos
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v4
+      - uses: taiki-e/install-action@v2
+        with:
+          tool: typos-cli
+      - name: run typos
+        run: typos
+      - name: Typos info
+        if: failure()
+        run: |
+          echo 'To fix typos, please run `typos -w`'
+          echo 'To check for a diff, run `typos`'
+          echo 'You can find typos here: https://crates.io/crates/typos'
+
   tests:
     name: Test ${{ matrix.toolchain }} ${{ matrix.platform.name }}
     runs-on: ${{ matrix.platform.os }}
@@ -24,7 +42,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        toolchain: [stable, nightly, '1.65.0']
+        toolchain: [stable, nightly, '1.70.0']
         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,  }
@@ -43,11 +61,20 @@ jobs:
           - { name: 'web',                target: wasm32-unknown-unknown,   os: ubuntu-latest,   }
         exclude:
           # Android is tested on stable-3
-          - toolchain: '1.65.0'
+          - toolchain: '1.70.0'
             platform: { name: 'Android', target: aarch64-linux-android, os: ubuntu-latest, options: '--package=winit --features=android-native-activity', cmd: 'apk --' }
         include:
-          - toolchain: '1.69.0'
+          - toolchain: '1.70.0'
             platform: { name: 'Android', target: aarch64-linux-android, os: ubuntu-latest, options: '--package=winit --features=android-native-activity', cmd: 'apk --' }
+          - toolchain: 'nightly'
+            platform: {
+              name:       'web Atomic',
+              target:     wasm32-unknown-unknown,
+              os:         ubuntu-latest,
+              options:    '-Zbuild-std=panic_abort,std',
+              rustflags:  '-Ctarget-feature=+atomics,+bulk-memory',
+              components: rust-src,
+            }
 
     env:
       # Set more verbose terminal output
@@ -55,8 +82,7 @@ jobs:
       RUST_BACKTRACE: 1
 
       # Faster compilation and error on warnings
-      RUSTFLAGS: '--codegen=debuginfo=0 --deny=warnings'
-      RUSTDOCFLAGS: '--deny=warnings'
+      RUSTFLAGS: '--codegen=debuginfo=0 --deny=warnings ${{ matrix.platform.rustflags }}'
 
       OPTIONS: --target=${{ matrix.platform.target }} ${{ matrix.platform.options }}
       CMD: ${{ matrix.platform.cmd }}
@@ -109,10 +135,12 @@ jobs:
       with:
         toolchain: ${{ matrix.toolchain }}${{ matrix.platform.host }}
         targets: ${{ matrix.platform.target }}
-        components: clippy
+        components: clippy, ${{ matrix.platform.components }}
 
     - name: Check documentation
       run: cargo doc --no-deps $OPTIONS --document-private-items
+      env:
+        RUSTDOCFLAGS: '--deny=warnings ${{ matrix.platform.rustflags }}'
 
     - name: Build crate
       run: cargo $CMD build $OPTIONS
@@ -120,7 +148,7 @@ jobs:
     - name: Build tests
       if: >
         !contains(matrix.platform.target, 'redox') &&
-        matrix.toolchain != '1.65.0'
+        matrix.toolchain != '1.70.0'
       run: cargo $CMD test --no-run $OPTIONS
 
     - name: Run tests
@@ -129,7 +157,7 @@ jobs:
         !contains(matrix.platform.target, 'ios') &&
         !contains(matrix.platform.target, 'wasm32') &&
         !contains(matrix.platform.target, 'redox') &&
-        matrix.toolchain != '1.65.0'
+        matrix.toolchain != '1.70.0'
       run: cargo $CMD test $OPTIONS
 
     - name: Lint with clippy
@@ -139,7 +167,7 @@ jobs:
     - name: Build tests with serde enabled
       if: >
         !contains(matrix.platform.target, 'redox') &&
-        matrix.toolchain != '1.65.0'
+        matrix.toolchain != '1.70.0'
       run: cargo $CMD test --no-run $OPTIONS --features serde
 
     - name: Run tests with serde enabled
@@ -148,9 +176,15 @@ jobs:
         !contains(matrix.platform.target, 'ios') &&
         !contains(matrix.platform.target, 'wasm32') &&
         !contains(matrix.platform.target, 'redox') &&
-        matrix.toolchain != '1.65.0'
+        matrix.toolchain != '1.70.0'
       run: cargo $CMD test $OPTIONS --features serde
 
+    - name: Check docs.rs documentation
+      if: matrix.toolchain == 'nightly'
+      run: cargo doc --no-deps $OPTIONS --features=rwh_04,rwh_05,rwh_06,serde,mint,android-native-activity
+      env:
+        RUSTDOCFLAGS: '--deny=warnings ${{ matrix.platform.rustflags }} --cfg=docsrs'
+
     # See restore step above
     - name: Save cache of cargo folder
       uses: actions/cache/save@v3

.github/workflows/docs.yml

@@ -0,0 +1,50 @@
+name: Docs
+
+on:
+  push:
+    branches: [master]
+
+jobs:
+  docs:
+    name: Documentation
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}winit
+
+    runs-on: ubuntu-latest
+
+    permissions:
+      contents: read
+      pages: write
+      id-token: write
+    
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: nightly
+
+      - name: Run Rustdoc
+        env:
+          RUSTDOCFLAGS: --crate-version master --cfg=docsrs
+        run: |
+          cargo doc --no-deps -Z rustdoc-map -Z rustdoc-scrape-examples --features=rwh_04,rwh_05,rwh_06,serde,mint,android-native-activity
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v4
+
+      - name: Fix permissions
+        run: |
+          chmod -c -R +rX "target/doc" | while read line; do
+            echo "::warning title=Invalid file permissions automatically fixed::$line"
+          done
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: target/doc
+
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

CHANGELOG.md

@@ -11,6 +11,53 @@ Unreleased` header.
 
 # Unreleased
 
+- Deprecate `EventLoop::run` in favor of `EventLoop::run_app`.
+- Deprecate `EventLoopExtRunOnDemand::run_on_demand` in favor of `EventLoop::run_app_on_demand`.
+- Deprecate `EventLoopExtPumpEvents::pump_events` in favor of `EventLoopExtPumpEvents::pump_app_events`.
+- Add `ApplicationHandler<T>` trait which mimics `Event<T>`.
+- Move `dpi` types to its own crate, and re-export it from the root crate.
+- Implement `Sync` for `EventLoopProxy<T: Send>`.
+- **Breaking:** Move `Window::new` to `ActiveEventLoop::create_window` and `EventLoop::create_window` (with the latter being deprecated).
+- **Breaking:** Rename `EventLoopWindowTarget` to `ActiveEventLoop`.
+- **Breaking:** Remove `Deref` implementation for `EventLoop` that gave `EventLoopWindowTarget`.
+- **Breaking**: Remove `WindowBuilder` in favor of `WindowAttributes`.
+- **Breaking:** Removed unnecessary generic parameter `T` from `EventLoopWindowTarget`.
+- On Windows, macOS, X11, Wayland and Web, implement setting images as cursors. See the `custom_cursors.rs` example.
+  - **Breaking:** Remove `Window::set_cursor_icon`
+  - Add `WindowBuilder::with_cursor` and `Window::set_cursor` which takes a `CursorIcon` or `CustomCursor`
+  - Add `CustomCursor::from_rgba` to allow creating cursor images from RGBA data.
+  - Add `CustomCursorExtWebSys::from_url` to allow loading cursor images from URLs.
+  - Add `CustomCursorExtWebSys::from_animation` to allow creating animated cursors from other `CustomCursor`s.
+  - Add `{Active,}EventLoop::create_custom_cursor` to load custom cursor image sources.
+- On macOS, add services menu.
+- **Breaking:** On Web, remove queuing fullscreen request in absence of transient activation.
+- On Web, fix setting cursor icon overriding cursor visibility.
+- **Breaking:** On Web, return `RawWindowHandle::WebCanvas` instead of `RawWindowHandle::Web`.
+- **Breaking:** On Web, macOS and iOS, return `HandleError::Unavailable` when a window handle is not available.
+- **Breaking:** Bump MSRV from `1.65` to `1.70`.
+- On Web, add the ability to toggle calling `Event.preventDefault()` on `Window`.
+- **Breaking:** Remove `WindowAttributes::fullscreen()` and expose as field directly.
+- **Breaking:** Rename `VideoMode` to `VideoModeHandle` to represent that it doesn't hold static data.
+- **Breaking:** No longer export `platform::x11::XNotSupported`.
+- **Breaking:** Renamed `platform::x11::XWindowType` to `platform::x11::WindowType`.
+- Add the `OwnedDisplayHandle` type for allowing safe display handle usage outside of trivial cases.
+- **Breaking:** Rename `TouchpadMagnify` to `PinchGesture`, `SmartMagnify` to `DoubleTapGesture` and `TouchpadRotate` to `RotationGesture` to represent the action rather than the intent.
+- on iOS, add detection support for `PinchGesture`, `DoubleTapGesture` and `RotationGesture`.
+- on Windows: add `with_system_backdrop`, `with_border_color`, `with_title_background_color`, `with_title_text_color` and `with_corner_preference`
+- On Windows, Remove `WS_CAPTION`, `WS_BORDER` and `WS_EX_WINDOWEDGE` styles for child windows without decorations.
+- **Breaking:** Removed `EventLoopError::AlreadyRunning`, which can't happen as it is already prevented by the type system.
+- Added `EventLoop::builder`, which is intended to replace the (now deprecated) `EventLoopBuilder::new`.
+- **Breaking:** Changed the signature of `EventLoop::with_user_event` to return a builder.
+- **Breaking:** Removed `EventLoopBuilder::with_user_event`, the functionality is now available in `EventLoop::with_user_event`.
+- Add `Window::default_attributes` to get default `WindowAttributes`.
+- `log` has been replaced with `tracing`. The old behavior can be emulated by setting the `log` feature on the `tracing` crate.
+
+# 0.29.14
+
+- On X11/Wayland, fix `text` and `text_with_all_modifiers` not being `None` during compose.
+- On Wayland, don't reapply cursor grab when unchanged.
+- On X11, fix a bug where some mouse events would be unexpectedly filtered out.
+
 # 0.29.13
 
 - On Web, fix possible crash with `ControlFlow::Wait` and `ControlFlow::WaitUntil`.
@@ -22,18 +69,19 @@ Unreleased` header.
 
 # 0.29.11
 
-- On Wayland, fix DeviceEvent::Motion not being sent
-- On X11, don't require XIM to run.
-- On X11, fix xkb state not being updated correctly sometimes leading to wrong input.
 - Fix compatibility with 32-bit platforms without 64-bit atomics.
 - On macOS, fix incorrect IME cursor rect origin.
-- On X11, fix swapped instance and general class names.
 - On Windows, fixed a race condition when sending an event through the loop proxy.
-- On Wayland, disable `Occluded` event handling.
+- On X11, fix swapped instance and general class names.
+- On X11, don't require XIM to run.
+- On X11, fix xkb state not being updated correctly sometimes leading to wrong input.
 - On X11, reload dpi on `_XSETTINGS_SETTINGS` update.
 - On X11, fix deadlock when adjusting DPI and resizing at the same time.
+- On Wayland, disable `Occluded` event handling.
+- On Wayland, fix DeviceEvent::Motion not being sent
 - On Wayland, fix `Focused(false)` being send when other seats still have window focused.
 - On Wayland, fix `Window::set_{min,max}_inner_size` not always applied.
+- On Wayland, fix title in CSD not updated from `AboutToWait`.
 - On Windows, fix inconsistent resizing behavior with multi-monitor setups when repositioning outside the event loop.
 - On Wayland, fix `WAYLAND_SOCKET` not used when detecting platform.
 - On Orbital, fix `logical_key` and `text` not reported in `KeyEvent`.
@@ -54,7 +102,6 @@ Unreleased` header.
 - On Orbital, implement `is_decorated`.
 - On Orbital, implement `set_window_level`.
 - On Orbital, emit `DeviceEvent::MouseMotion`.
-- On Wayland, fix title in CSD not updated from `AboutToWait`.
 
 # 0.29.10
 
@@ -111,11 +158,12 @@ Unreleased` header.
 - On macOS, send a `Resized` event after each `ScaleFactorChanged` event.
 - On Wayland, fix `wl_surface` being destroyed before associated objects.
 - On macOS, fix assertion when pressing `Fn` key.
+- On Windows, add `WindowBuilderExtWindows::with_clip_children` to control `WS_CLIPCHILDREN` style.
 
 # 0.29.3
 
 - On Wayland, apply correct scale to `PhysicalSize` passed in `WindowBuilder::with_inner_size` when possible.
-- On Wayland, fix `RedrawRequsted` being always sent without decorations and `sctk-adwaita` feature.
+- On Wayland, fix `RedrawRequested` being always sent without decorations and `sctk-adwaita` feature.
 - On Wayland, ignore resize requests when the window is fully tiled.
 - On Wayland, use `configure_bounds` to constrain `with_inner_size` when compositor wants users to pick size.
 - On Windows, fix deadlock when accessing the state during `Cursor{Enter,Leave}`.
@@ -367,7 +415,7 @@ Unreleased` header.
 - **Breaking:**: Removed deprecated method `platform::unix::WindowExtUnix::is_ready`.
 - Removed `parking_lot` dependency.
 - **Breaking:** On macOS, add support for two-finger touchpad magnification and rotation gestures with new events `WindowEvent::TouchpadMagnify` and `WindowEvent::TouchpadRotate`. Also add support for touchpad smart-magnification gesture with a new event `WindowEvent::SmartMagnify`.
-- **Breaking:** On web, the `WindowBuilderExtWebSys::with_prevent_default` setting (enabled by default), now additionally prevents scrolling of the webpage in mobile browsers, previously it only disabled scrolling on desktop.
+- **Breaking:** On Web, the `WindowBuilderExtWebSys::with_prevent_default` setting (enabled by default), now additionally prevents scrolling of the webpage in mobile browsers, previously it only disabled scrolling on desktop.
 - On Wayland, `wayland-csd-adwaita` now uses `ab_glyph` instead of `crossfont` to render the title for decorations.
 - On Wayland, a new `wayland-csd-adwaita-crossfont` feature was added to use `crossfont` instead of `ab_glyph` for decorations.
 - On Wayland, if not otherwise specified use upstream automatic CSD theme selection.
@@ -387,7 +435,7 @@ Unreleased` header.
 - Added `Window::set_transparent` to provide a hint about transparency of the window on Wayland and macOS.
 - On macOS, fix the mouse buttons other than left/right/middle being reported as middle.
 - On Wayland, support fractional scaling via the wp-fractional-scale protocol.
-- On web, fix removal of mouse event listeners from the global object upon window distruction.
+- On Web, fix removal of mouse event listeners from the global object upon window destruction.
 - Add WindowAttributes getter to WindowBuilder to allow introspection of default values.
 - Added `Window::set_ime_purpose` for setting the IME purpose, currently implemented on Wayland only.
 
@@ -493,7 +541,7 @@ Unreleased` header.
 - On Web, add `with_prevent_default` and `with_focusable` to `WindowBuilderExtWebSys` to control whether events should be propagated.
 - On Windows, fix focus events being sent to inactive windows.
 - **Breaking**, update `raw-window-handle` to `v0.5` and implement `HasRawDisplayHandle` for `Window` and `EventLoopWindowTarget`.
-- On X11, add function `register_xlib_error_hook` into `winit::platform::unix` to subscribe for errors comming from Xlib.
+- On X11, add function `register_xlib_error_hook` into `winit::platform::unix` to subscribe for errors coming from Xlib.
 - On Android, upgrade `ndk` and `ndk-glue` dependencies to the recently released `0.7.0`.
 - All platforms can now be relied on to emit a `Resumed` event. Applications are recommended to lazily initialize graphics state and windows on first resume for portability.
 - **Breaking:**: Reverse horizontal scrolling sign in `MouseScrollDelta` to match the direction of vertical scrolling. A positive X value now means moving the content to the right. The meaning of vertical scrolling stays the same: a positive Y value means moving the content down.
@@ -792,7 +840,7 @@ Unreleased` header.
 - On Windows, fix handling of surrogate pairs when dispatching `ReceivedCharacter`.
 - On macOS 10.15, fix freeze upon exiting exclusive fullscreen mode.
 - On iOS, fix panic upon closing the app.
-- On X11, allow setting mulitple `XWindowType`s.
+- On X11, allow setting multiple `XWindowType`s.
 - On iOS, fix null window on initial `HiDpiFactorChanged` event.
 - On Windows, fix fullscreen window shrinking upon getting restored to a normal window.
 - On macOS, fix events not being emitted during modal loops, such as when windows are being resized
@@ -945,7 +993,7 @@ and `WindowEvent::HoveredFile`.
 - On Windows, hiding the cursor no longer hides the cursor for all Winit windows - just the one `hide_cursor` was called on.
 - On Windows, cursor grabs used to get perpetually canceled when the grabbing window lost focus. Now, cursor grabs automatically get re-initialized when the window regains focus and the mouse moves over the client area.
 - On Windows, only vertical mouse wheel events were handled. Now, horizontal mouse wheel events are also handled.
-- On Windows, ignore the AltGr key when populating the `ModifersState` type.
+- On Windows, ignore the AltGr key when populating the `ModifiersState` type.
 
 # Version 0.18.1 (2018-12-30)
 
@@ -1225,7 +1273,7 @@ _Yanked_
 
 # Version 0.8.2 (2017-09-28)
 
-- Uniformize keyboard scancode values accross Wayland and X11 (#297).
+- Uniformize keyboard scancode values across Wayland and X11 (#297).
 - Internal rework of the wayland event loop
 - Added method `os::linux::WindowExt::is_ready`
 
@@ -1239,7 +1287,7 @@ _Yanked_
 - Added `Window::set_maximized`, `WindowAttributes::maximized` and `WindowBuilder::with_maximized`.
 - Added `Window::set_fullscreen`.
 - Changed `with_fullscreen` to take a `Option<MonitorId>` instead of a `MonitorId`.
-- Removed `MonitorId::get_native_identifer()` in favor of platform-specific traits in the `os`
+- Removed `MonitorId::get_native_identifier()` in favor of platform-specific traits in the `os`
   module.
 - Changed `get_available_monitors()` and `get_primary_monitor()` to be methods of `EventsLoop`
   instead of stand-alone methods.

CODE_OF_CONDUCT.md

@@ -0,0 +1,6 @@
+# Code of Conduct
+
+The `rust-windowing` project adheres to the [Rust Code of Conduct]. This
+describes the minimum behavior expected from all contributors.
+
+[Rust Code of Conduct]: https://www.rust-lang.org/policies/code-of-conduct

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 1.70.
 - 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
@@ -42,11 +42,9 @@ Once your PR is deemed ready, the merging maintainer will take care of resolving
 `CHANGELOG.md` (but you must resolve other conflicts yourself). Doing this requires that you check the
 "give contributors write access to the branch" checkbox when creating the PR.
 
-## Maintainers & Testers
+## Maintainers
 
-The current maintainers are listed in the [CODEOWNERS](.github/CODEOWNERS) file.
-
-If you are interested in being pinged when testing is needed for a specific platform, please add yourself to the [Testers and Contributors](https://github.com/rust-windowing/winit/wiki/Testers-and-Contributors) table!
+The current maintainers for each platform are listed in the [CODEOWNERS](.github/CODEOWNERS) file.
 
 ## Release process
 
@@ -63,7 +61,7 @@ The exact steps for an exemplary `0.2.0` release might look like this:
   5. The version is pushed to crates.io
   6. A GitHub release is created for the `v0.2.0` tag
   7. On master, the version is bumped to `0.2.0`, and the CHANGELOG is updated
-  
+
 When doing a patch release, the process is similar:
   1. Initially, the version of the latest release is `0.2.0`
   2. Checkout the `v0.2.x` branch

Cargo.toml

@@ -1,16 +1,16 @@
 [package]
 name = "winit"
-version = "0.29.13"
+version = "0.29.14"
 authors = ["The winit contributors", "Pierre Krieger <pierre.krieger1708@gmail.com>"]
 description = "Cross-platform window creation library."
-edition = "2021"
 keywords = ["windowing"]
-license = "Apache-2.0"
 readme = "README.md"
-repository = "https://github.com/rust-windowing/winit"
 documentation = "https://docs.rs/winit"
 categories = ["gui"]
-rust-version = "1.65.0"
+rust-version.workspace = true
+repository.workspace = true
+license.workspace = true
+edition.workspace = true
 
 [package.metadata.docs.rs]
 features = [
@@ -18,10 +18,10 @@ features = [
     "rwh_05",
     "rwh_06",
     "serde",
+    "mint",
     # Enabled to get docs to compile
     "android-native-activity",
 ]
-default-target = "x86_64-unknown-linux-gnu"
 # These are all tested in CI
 targets = [
     # Windows
@@ -36,11 +36,12 @@ targets = [
     "x86_64-apple-ios",
     # Android
     "aarch64-linux-android",
-    # WebAssembly
+    # Web
     "wasm32-unknown-unknown",
 ]
 rustdoc-args = ["--cfg", "docsrs"]
 
+# Features are documented in either `lib.rs` or under `winit::platform`.
 [features]
 default = ["rwh_06", "x11", "wayland", "wayland-dlopen", "wayland-csd-adwaita"]
 x11 = ["x11-dl", "bytemuck", "percent-encoding", "xkbcommon-dl/x11", "x11rb"]
@@ -51,33 +52,34 @@ wayland-csd-adwaita-crossfont = ["sctk-adwaita", "sctk-adwaita/crossfont"]
 wayland-csd-adwaita-notitle = ["sctk-adwaita"]
 android-native-activity = ["android-activity/native-activity"]
 android-game-activity = ["android-activity/game-activity"]
-serde = ["dep:serde", "cursor-icon/serde", "smol_str/serde"]
+serde = ["dep:serde", "cursor-icon/serde", "smol_str/serde", "dpi/serde"]
+mint = ["dpi/mint"]
 rwh_04 = ["dep:rwh_04", "ndk/rwh_04"]
 rwh_05 = ["dep:rwh_05", "ndk/rwh_05"]
 rwh_06 = ["dep:rwh_06", "ndk/rwh_06"]
 
 [build-dependencies]
-cfg_aliases = "0.1.1"
+cfg_aliases = "0.2.0"
 
 [dependencies]
 bitflags = "2"
 cursor-icon = "1.1.0"
-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 = "0.5.2", features = ["std"], optional = true }
 rwh_06 = { package = "raw-window-handle", version = "0.6", features = ["std"], optional = true }
-serde = { version = "1", optional = true, features = ["serde_derive"] }
+serde = { workspace = true, optional = true }
 smol_str = "0.2.0"
+dpi = { path = "dpi" }
+tracing = { version = "0.1.40", default_features = false }
 
 [dev-dependencies]
 image = { version = "0.24.0", default-features = false, features = ["png"] }
-simple_logger = { version = "4.2.0", default_features = false }
+tracing = { version = "0.1.40", default_features = false, features = ["log"] }
+tracing-subscriber = { version = "0.3.18", features = ["env-filter"] }
 winit = { path = ".", features = ["rwh_05"] }
 
 [target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dev-dependencies]
-softbuffer = "0.3.0"
+softbuffer = { version = "0.3.0", default-features = false, features = ["x11", "x11-dlopen", "wayland", "wayland-dlopen"] }
 
 [target.'cfg(target_os = "android")'.dependencies]
 android-activity = "0.5.0"
@@ -86,13 +88,13 @@ ndk-sys = "0.5.0"
 
 [target.'cfg(any(target_os = "ios", target_os = "macos"))'.dependencies]
 core-foundation = "0.9.3"
-objc2 = "0.4.1"
+objc2 = "0.5.0"
 
 [target.'cfg(target_os = "macos")'.dependencies]
 core-graphics = "0.23.1"
 
 [target.'cfg(target_os = "macos")'.dependencies.icrate]
-version = "0.0.4"
+version = "0.1.0"
 features = [
     "dispatch",
     "Foundation",
@@ -105,10 +107,31 @@ features = [
     "Foundation_NSProcessInfo",
     "Foundation_NSThread",
     "Foundation_NSNumber",
+    "AppKit",
+    "AppKit_NSAppearance",
+    "AppKit_NSApplication",
+    "AppKit_NSBitmapImageRep",
+    "AppKit_NSButton",
+    "AppKit_NSColor",
+    "AppKit_NSControl",
+    "AppKit_NSCursor",
+    "AppKit_NSEvent",
+    "AppKit_NSGraphicsContext",
+    "AppKit_NSImage",
+    "AppKit_NSImageRep",
+    "AppKit_NSMenu",
+    "AppKit_NSMenuItem",
+    "AppKit_NSPasteboard",
+    "AppKit_NSResponder",
+    "AppKit_NSScreen",
+    "AppKit_NSTextInputContext",
+    "AppKit_NSView",
+    "AppKit_NSWindow",
+    "AppKit_NSWindowTabGroup",
 ]
 
 [target.'cfg(target_os = "ios")'.dependencies.icrate]
-version = "0.0.4"
+version = "0.1.0"
 features = [
     "dispatch",
     "Foundation",
@@ -152,7 +175,7 @@ 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 }
+ahash = { version = "0.8.7", features = ["no-rng"], optional = true }
 bytemuck = { version = "1.13.1", default-features = false, optional = true }
 calloop = "0.12.3"
 libc = "0.2.64"
@@ -165,13 +188,13 @@ wayland-backend = { version = "0.3.0", default_features = false, features = ["cl
 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 }
-x11-dl = { version = "2.18.5", optional = true }
+x11-dl = { version = "2.19.1", optional = true }
 x11rb = { version = "0.13.0", default-features = false, features = ["allow-unsafe-code", "dl-libxcb", "randr", "resource_manager", "xinput", "xkb"], optional = true }
 xkbcommon-dl = "0.4.2"
 
 [target.'cfg(target_os = "redox")'.dependencies]
-orbclient = { version = "0.3.42", default-features = false }
-redox_syscall = "0.3"
+orbclient = { version = "0.3.47", default-features = false }
+redox_syscall = "0.4.1"
 
 [target.'cfg(target_family = "wasm")'.dependencies.web_sys]
 package = "web-sys"
@@ -179,9 +202,11 @@ version = "0.3.64"
 features = [
     'AbortController',
     'AbortSignal',
+    'Blob',
     'console',
     'CssStyleDeclaration',
     'Document',
+    'DomException',
     'DomRect',
     'DomRectReadOnly',
     'Element',
@@ -190,6 +215,11 @@ features = [
     'FocusEvent',
     'HtmlCanvasElement',
     'HtmlElement',
+    'HtmlImageElement',
+    'ImageBitmap',
+    'ImageBitmapOptions',
+    'ImageBitmapRenderingContext',
+    'ImageData',
     'IntersectionObserver',
     'IntersectionObserverEntry',
     'KeyboardEvent',
@@ -199,6 +229,7 @@ features = [
     'Node',
     'PageTransitionEvent',
     'PointerEvent',
+    'PremultiplyAlpha',
     'ResizeObserver',
     'ResizeObserverBoxOptions',
     'ResizeObserverEntry',
@@ -206,21 +237,42 @@ features = [
     'ResizeObserverSize',
     'VisibilityState',
     'Window',
-    'WheelEvent'
+    'WheelEvent',
+    'Url',
 ]
 
 [target.'cfg(target_family = "wasm")'.dependencies]
-atomic-waker = "1"
 js-sys = "0.3.64"
+pin-project = "1"
 wasm-bindgen = "0.2"
 wasm-bindgen-futures = "0.4"
-web-time = "0.2"
+web-time = "1"
+
+[target.'cfg(all(target_family = "wasm", target_feature = "atomics"))'.dependencies]
+atomic-waker = "1"
+concurrent-queue = { version = "2", default-features = false }
 
 [target.'cfg(target_family = "wasm")'.dev-dependencies]
 console_log = "1"
 web-sys = { version = "0.3.22", features = ['CanvasRenderingContext2d'] }
 
+[[example]]
+doc-scrape-examples = true
+name = "window"
+
 [workspace]
+resolver = "2"
 members = [
+    "dpi",
     "run-wasm",
 ]
+
+[workspace.package]
+rust-version = "1.70.0"
+repository = "https://github.com/rust-windowing/winit"
+license = "Apache-2.0"
+edition = "2021"
+
+[workspace.dependencies]
+serde = { version = "1", features = ["serde_derive"] }
+mint = "0.5.6"

FEATURES.md

@@ -3,8 +3,8 @@
 Winit aims to expose an interface that abstracts over window creation and input handling and can
 be used to create both games and applications. It supports the following main graphical platforms:
 - Desktop
-  - Windows 7+ (10+ is tested regularly)
-  - macOS 10.7+ (10.14+ is tested regularly)
+  - Windows
+  - macOS
   - Unix
     - via X11
     - via Wayland
@@ -13,9 +13,6 @@ be used to create both games and applications. It supports the following main gr
   - iOS
   - Android
 - Web
-  - Chrome
-  - Firefox
-  - Safari 13.1+
 
 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
@@ -106,6 +103,7 @@ If your PR makes notable changes to Winit's features, please update this section
 - **Cursor locking**: Locking the cursor inside the window so it cannot move.
 - **Cursor confining**: Confining the cursor to the window bounds so it cannot leave them.
 - **Cursor icon**: Changing the cursor icon or hiding the cursor.
+- **Cursor image**: Changing the cursor to your own image.
 - **Cursor hittest**: Handle or ignore mouse events for a window.
 - **Touch events**: Single-touch events.
 - **Touch pressure**: Touch events contain information about the amount of force being applied.
@@ -125,6 +123,11 @@ If your PR makes notable changes to Winit's features, please update this section
 * Setting a menu bar
 * `WS_EX_NOREDIRECTIONBITMAP` support
 * Theme the title bar according to Windows 10 Dark Mode setting or set a preferred theme
+* Changing a system-drawn backdrop
+* Setting the window border color
+* Setting the title bar background color
+* Setting the title color
+* Setting the corner rounding preference
 
 ### macOS
 * Window activation policy
@@ -145,7 +148,6 @@ If your PR makes notable changes to Winit's features, please update this section
 * Setting the X11 parent window
 
 ### iOS
-* `winit` has a minimum OS requirement of iOS 8
 * Get the `UIScreen` object pointer
 * Setting the `UIView` hidpi factor
 * Valid orientations
@@ -158,9 +160,6 @@ If your PR makes notable changes to Winit's features, please update this section
 ### Web
 * Get if the systems preferred color scheme is "dark"
 
-## Usability
-* `serde`: Enables serialization/deserialization of certain types with Serde. (Maintainer: @Osspial)
-
 ## Compatibility Matrix
 
 Legend:
@@ -206,6 +205,7 @@ Legend:
 |Cursor locking          |❌       |✔️      |❌       |✔️          |**N/A**|**N/A**|✔️        |❌      |
 |Cursor confining        |✔️       |❌      |✔️       |✔️          |**N/A**|**N/A**|❌       |❌      |
 |Cursor icon             |✔️       |✔️      |✔️       |✔️          |**N/A**|**N/A**|✔️        |**N/A** |
+|Cursor image            |✔️       |✔️      |✔️       |✔️          |**N/A**|**N/A**|✔️        |**N/A** |
 |Cursor hittest          |✔️       |✔️      |✔️       |✔️          |**N/A**|**N/A**|❌        |❌      |
 |Touch events            |✔️       |❌      |✔️       |✔️          |✔️    |✔️     |✔️        |**N/A** |
 |Touch pressure          |✔️       |❌      |❌       |❌          |❌    |✔️     |✔️        |**N/A** |

README.md

@@ -2,11 +2,13 @@
 
 [![Crates.io](https://img.shields.io/crates/v/winit.svg)](https://crates.io/crates/winit)
 [![Docs.rs](https://docs.rs/winit/badge.svg)](https://docs.rs/winit)
+[![Master Docs](https://img.shields.io/github/actions/workflow/status/rust-windowing/winit/docs.yml?branch=master&label=master%20docs
+)](https://rust-windowing.github.io/winit/winit/index.html)
 [![CI Status](https://github.com/rust-windowing/winit/workflows/CI/badge.svg)](https://github.com/rust-windowing/winit/actions)
 
 ```toml
 [dependencies]
-winit = "0.29.13"
+winit = "0.29.14"
 ```
 
 ## [Documentation](https://docs.rs/winit)
@@ -17,10 +19,9 @@ For features _outside_ the scope of winit, see [Are we GUI Yet?](https://arewegu
 
 ## Contact Us
 
-Join us in any of these:
+Join us in our [![Matrix](https://img.shields.io/badge/Matrix-%23rust--windowing%3Amatrix.org-blueviolet.svg)](https://matrix.to/#/#rust-windowing:matrix.org) room. If you don't get an answer there, try [![Libera.Chat](https://img.shields.io/badge/libera.chat-%23winit-red.svg)](https://web.libera.chat/#winit).
 
-[![Matrix](https://img.shields.io/badge/Matrix-%23rust--windowing%3Amatrix.org-blueviolet.svg)](https://matrix.to/#/#rust-windowing:matrix.org)
-[![Libera.Chat](https://img.shields.io/badge/libera.chat-%23winit-red.svg)](https://web.libera.chat/#winit)
+The maintainers have a meeting every friday at UTC 15. The meeting notes can be found [here](https://hackmd.io/@winit-meetings).
 
 ## Usage
 
@@ -32,17 +33,9 @@ Winit is designed to be a low-level brick in a hierarchy of libraries. Consequen
 show something on the window you need to use the platform-specific getters provided by winit, or
 another library.
 
-### Cargo Features
-
-Winit provides the following features, which can be enabled in your `Cargo.toml` file:
-* `serde`: Enables serialization/deserialization of certain types with [Serde](https://crates.io/crates/serde).
-* `x11` (enabled by default): On Unix platform, compiles with the X11 backend
-* `wayland` (enabled by default): On Unix platform, compiles with the Wayland backend
-* `mint`: Enables mint (math interoperability standard types) conversions.
-
 ## MSRV Policy
 
-This crate's Minimum Supported Rust Version (MSRV) is **1.65**. Changes to
+This crate's Minimum Supported Rust Version (MSRV) is **1.70**. 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
@@ -70,118 +63,4 @@ same MSRV policy.
 
 ### Platform-specific usage
 
-#### Wayland
-
-Note that windows don't appear on Wayland until you draw/present to them.
-
-#### WebAssembly
-
-To run the web example: `cargo run-wasm --example web`
-
-Winit supports compiling to the `wasm32-unknown-unknown` target with `web-sys`.
-
-On the web platform, a Winit window is backed by a `<canvas>` element. You can
-either [provide Winit with a `<canvas>` element][web with_canvas], or [let Winit
-create a `<canvas>` element which you can then retrieve][web canvas getter] and
-insert it into the DOM yourself.
-
-For the example code using Winit with WebAssembly, check out the [web example]. For
-information on using Rust on WebAssembly, check out the [Rust and WebAssembly
-book].
-
-[web with_canvas]: https://docs.rs/winit/latest/wasm32-unknown-unknown/winit/platform/web/trait.WindowBuilderExtWebSys.html#tymethod.with_canvas
-[web canvas getter]: https://docs.rs/winit/latest/wasm32-unknown-unknown/winit/platform/web/trait.WindowExtWebSys.html#tymethod.canvas
-[web example]: ./examples/web.rs
-[Rust and WebAssembly book]: https://rustwasm.github.io/book/
-
-#### Android
-
-The Android backend builds on (and exposes types from) the [`ndk`](https://docs.rs/ndk/latest/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
-various life-cycle events and synchronizing with the main JVM thread.
-
-Winit uses the [android-activity](https://github.com/rib/android-activity) as a
-glue crate (prior to `0.28` it used
-[ndk-glue](https://github.com/rust-windowing/android-ndk-rs/tree/master/ndk-glue)).
-
-The version of the glue crate that your application depends on _must_ match the
-version that Winit depends on because the glue crate is responsible for your
-application's main entry point. If Cargo resolves multiple versions, they will
-clash.
-
-`winit` glue compatibility table:
-
-| winit |       ndk-glue               |
-| :---: | :--------------------------: |
-| 0.29  | `android-activity = "0.5"`   |
-| 0.28  | `android-activity = "0.4"`   |
-| 0.27  | `ndk-glue = "0.7"`           |
-| 0.26  | `ndk-glue = "0.5"`           |
-| 0.25  | `ndk-glue = "0.3"`           |
-| 0.24  | `ndk-glue = "0.2"`           |
-
-The recommended way to avoid a conflict with the glue version is to avoid explicitly
-depending on the `android-activity` crate, and instead consume the API that
-is re-exported by Winit under `winit::platform::android::activity::*`
-
-Running on an Android device needs a dynamic system library. Add this to Cargo.toml:
-
-```toml
-[lib]
-name = "main"
-crate-type = ["cdylib"]
-```
-
-All Android applications are based on an `Activity` subclass, and the
-`android-activity` crate is designed to support different choices for this base
-class. Your application _must_ specify the base class it needs via a feature flag:
-
-| Base Class       | Feature Flag      |  Notes  |
-| :--------------: | :---------------: | :-----: |
-| `NativeActivity` | `android-native-activity` | Built-in to Android - it is possible to use without compiling any Java or Kotlin code. Java or Kotlin code may be needed to subclass `NativeActivity` to access some platform features. It does not derive from the [`AndroidAppCompat`] base class.|
-| [`GameActivity`] | `android-game-activity`   | Derives from [`AndroidAppCompat`], a defacto standard `Activity` base class that helps support a wider range of Android versions. Requires a build system that can compile Java or Kotlin and fetch Android dependencies from a [Maven repository][agdk_jetpack] (or link with an embedded [release][agdk_releases] of [`GameActivity`]) |
-
-[`GameActivity`]: https://developer.android.com/games/agdk/game-activity
-[`GameTextInput`]: https://developer.android.com/games/agdk/add-support-for-text-input
-[`AndroidAppCompat`]: https://developer.android.com/reference/androidx/appcompat/app/AppCompatActivity
-[agdk_jetpack]: https://developer.android.com/jetpack/androidx/releases/games
-[agdk_releases]: https://developer.android.com/games/agdk/download#agdk-libraries
-[Gradle]: https://developer.android.com/studio/build
-
-For more details, refer to these `android-activity` [example applications](https://github.com/rust-mobile/android-activity/tree/main/examples).
-
-##### Converting from `ndk-glue` to `android-activity`
-
-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 = "0.29.13", 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).
-
-#### MacOS
-
-A lot of functionality expects the application to be ready before you start
-doing anything; this includes creating windows, fetching monitors, drawing,
-and so on, see issues [#2238], [#2051] and [#2087].
-
-If you encounter problems, you should try doing your initialization inside
-`Event::Resumed`.
-
-#### iOS
-
-Similar to macOS, iOS's main `UIApplicationMain` does some init work that's required
-by all UI-related code (see issue [#1705]). It would be best to consider creating your windows
-inside `Event::Resumed`.
-
-
-[#2238]: https://github.com/rust-windowing/winit/issues/2238
-[#2051]: https://github.com/rust-windowing/winit/issues/2051
-[#2087]: https://github.com/rust-windowing/winit/issues/2087
-[#1705]: https://github.com/rust-windowing/winit/issues/1705
-
-#### Redox OS
-
-Redox OS has some functionality not yet present that will be implemented when
-its orbital display server provides it.
+Check out the [`winit::platform`](https://rust-windowing.github.io/winit/winit/platform/index.html) module for platform-specific usage.

build.rs

@@ -8,7 +8,7 @@ fn main() {
     cfg_aliases! {
         // Systems.
         android_platform: { target_os = "android" },
-        wasm_platform: { all(target_family = "wasm", not(target_os = "emscripten")) },
+        web_platform: { all(target_family = "wasm", target_os = "unknown") },
         macos_platform: { target_os = "macos" },
         ios_platform: { target_os = "ios" },
         windows_platform: { target_os = "windows" },
@@ -17,8 +17,8 @@ fn main() {
         redox: { target_os = "redox" },
 
         // Native displays.
-        x11_platform: { all(feature = "x11", free_unix, not(wasm), not(redox)) },
-        wayland_platform: { all(feature = "wayland", free_unix, not(wasm), not(redox)) },
+        x11_platform: { all(feature = "x11", free_unix, not(redox)) },
+        wayland_platform: { all(feature = "wayland", free_unix, not(redox)) },
         orbital_platform: { redox },
     }
 }

clippy.toml

@@ -6,8 +6,10 @@ disallowed-methods = [
     { 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::HtmlElement::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." },
+    { path = "icrate::AppKit::NSWindow::setFrameTopLeftPoint", reason = "Not sufficient when working with Winit's coordinate system, use `flip_window_screen_coordinates` instead" },
 ]

deny.toml

@@ -34,7 +34,6 @@ 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 = "redox_syscall" },        # https://gitlab.redox-os.org/redox-os/orbclient/-/issues/46
 ]
 skip-tree = []
 

dpi/CHANGELOG.md

@@ -0,0 +1,14 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+Please keep one empty line before and after all headers. (This is required for
+`git` to produce a conflict when a release is made while a PR is open and the
+PR's changelog entry would go into the wrong section).
+
+And please only add new entries to the top of this list, right below the `#
+Unreleased` header.
+
+# Unreleased
+
+- Add `LogicalUnit`, `PhysicalUnit` and `PixelUnit` types and related functions.

dpi/Cargo.toml

@@ -0,0 +1,39 @@
+[package]
+name = "dpi"
+version = "0.0.0"
+description = "Types for handling UI scaling"
+keywords = ["DPI", "HiDPI", "scale-factor"]
+categories = ["gui"]
+rust-version.workspace = true
+repository.workspace = true
+license.workspace = true
+edition.workspace = true
+
+[features]
+serde = ["dep:serde"]
+mint = ["dep:mint"]
+
+[dependencies]
+serde = { workspace = true, optional = true }
+mint = { workspace = true, optional = true }
+
+[package.metadata.docs.rs]
+features = ["serde", "mint"]
+# These are all tested in CI
+targets = [
+    # Windows
+    "i686-pc-windows-msvc",
+    "x86_64-pc-windows-msvc",
+    # macOS
+    "x86_64-apple-darwin",
+    # Unix (X11 & Wayland)
+    "i686-unknown-linux-gnu",
+    "x86_64-unknown-linux-gnu",
+    # iOS
+    "x86_64-apple-ios",
+    # Android
+    "aarch64-linux-android",
+    # Web
+    "wasm32-unknown-unknown",
+]
+rustdoc-args = ["--cfg", "docsrs"]

dpi/LICENSE

@@ -0,0 +1 @@
+../LICENSE

dpi/src/lib.rs

@@ -1,4 +1,4 @@
-//! UI scaling is important, so read the docs for this module if you don't want to be confused.
+//! # DPI
 //!
 //! ## Why should I care about UI scaling?
 //!
@@ -35,14 +35,11 @@
 //!
 //! ### Position and Size types
 //!
-//! Winit's [`PhysicalPosition`] / [`PhysicalSize`] types correspond with the actual pixels on the
-//! device, and the [`LogicalPosition`] / [`LogicalSize`] types correspond to the physical pixels
+//! The [`PhysicalPosition`] / [`PhysicalSize`] / [`PhysicalUnit`] types correspond with the actual pixels on the
+//! device, and the [`LogicalPosition`] / [`LogicalSize`] / [`LogicalUnit`] types correspond to the physical pixels
 //! divided by the scale factor.
-//! All of Winit's functions return physical types, but can take either logical or physical
-//! coordinates as input, allowing you to use the most convenient coordinate system for your
-//! particular application.
 //!
-//! Winit's position and size types are generic over their exact pixel type, `P`, to allow the
+//! The position and size types are generic over their exact pixel type, `P`, to allow the
 //! API to have integer precision where appropriate (e.g. most window manipulation functions) and
 //! floating precision when necessary (e.g. logical sizes for fractional scale factors and touch
 //! input). If `P` is a floating-point type, please do not cast the values with `as {int}`. Doing so
@@ -51,58 +48,27 @@
 //! rounding properly. Note that precision loss will still occur when rounding from a float to an
 //! int, although rounding lessens the problem.
 //!
-//! ### Events
+//! ## Cargo Features
 //!
-//! Winit will dispatch a [`ScaleFactorChanged`] event whenever a window's scale factor has changed.
-//! This can happen if the user drags their window from a standard-resolution monitor to a high-DPI
-//! monitor or if the user changes their DPI settings. This allows you to rescale your application's
-//! UI elements and adjust how the platform changes the window's size to reflect the new scale
-//! factor. If a window hasn't received a [`ScaleFactorChanged`] event, its scale factor
-//! can be found by calling [`window.scale_factor()`].
+//! This crate provides the following Cargo features:
 //!
-//! ## How is the scale factor calculated?
-//!
-//! The scale factor is calculated differently on different platforms:
-//!
-//! - **Windows:** On Windows 8 and 10, per-monitor scaling is readily configured by users from the
-//!   display settings. While users are free to select any option they want, they're only given a
-//!   selection of "nice" scale factors, i.e. 1.0, 1.25, 1.5... on Windows 7. The scale factor is
-//!   global and changing it requires logging out. See [this article][windows_1] for technical
-//!   details.
-//! - **macOS:** Recent macOS versions allow the user to change the scaling factor for specific
-//!   displays. When available, the user may pick a per-monitor scaling factor from a set of
-//!   pre-defined settings. All "retina displays" have a scaling factor above 1.0 by default,
-//!   but the specific value varies across devices.
-//! - **X11:** Many man-hours have been spent trying to figure out how to handle DPI in X11. Winit
-//!   currently uses a three-pronged approach:
-//!   + Use the value in the `WINIT_X11_SCALE_FACTOR` environment variable if present.
-//!   + If not present, use the value set in `Xft.dpi` in Xresources.
-//!   + Otherwise, calculate the scale factor based on the millimeter monitor dimensions provided by XRandR.
-//!
-//!   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:** The scale factor is suggested by the compositor for each window individually. The
-//!   monitor scale factor may differ from the window scale factor.
-//! - **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.
-//! - **Android:** Scale factors are set by the manufacturer to the value that best suits the
-//!   device, and range from `1.0` to `4.0`. See [this article][android_1] for more information.
-//! - **Web:** The scale factor is the ratio between CSS pixels and the physical device pixels.
-//!   In other words, it is the value of [`window.devicePixelRatio`][web_1]. It is affected by
-//!   both the screen scaling and the browser zoom level and can go below `1.0`.
+//! * `serde`: Enables serialization/deserialization of certain types with
+//!   [Serde](https://crates.io/crates/serde).
+//! * `mint`: Enables mint (math interoperability standard types) conversions.
 //!
 //!
 //! [points]: https://en.wikipedia.org/wiki/Point_(typography)
 //! [picas]: https://en.wikipedia.org/wiki/Pica_(typography)
-//! [`ScaleFactorChanged`]: crate::event::WindowEvent::ScaleFactorChanged
-//! [`window.scale_factor()`]: crate::window::Window::scale_factor
-//! [windows_1]: https://docs.microsoft.com/en-us/windows/win32/hidpi/high-dpi-desktop-application-development-on-windows
-//! [apple_1]: https://developer.apple.com/library/archive/documentation/DeviceInformation/Reference/iOSDeviceCompatibility/Displays/Displays.html
-//! [apple_2]: https://developer.apple.com/design/human-interface-guidelines/macos/icons-and-images/image-size-and-resolution/
-//! [android_1]: https://developer.android.com/training/multiscreen/screendensities
-//! [web_1]: https://developer.mozilla.org/en-US/docs/Web/API/Window/devicePixelRatio
+
+#![cfg_attr(
+    docsrs,
+    feature(doc_auto_cfg, doc_cfg_hide),
+    doc(cfg_hide(doc, docsrs))
+)]
+#![forbid(unsafe_code)]
+
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
 
 pub trait Pixel: Copy + Into<f64> {
     fn from_f64(f: f64) -> Self;
@@ -162,10 +128,242 @@ pub fn validate_scale_factor(scale_factor: f64) -> bool {
     scale_factor.is_sign_positive() && scale_factor.is_normal()
 }
 
+/// A logical pixel unit.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Default, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub struct LogicalUnit<P>(pub P);
+
+impl<P> LogicalUnit<P> {
+    /// Represents a minimum logical unit of [`f64::MAX`].
+    pub const MIN: LogicalUnit<f64> = LogicalUnit::new(f64::MIN);
+    /// Represents a logical unit of `0_f64`.
+    pub const ZERO: LogicalUnit<f64> = LogicalUnit::new(0.0);
+    /// Represents a maximum logical unit that is equal to [`f64::MAX`].
+    pub const MAX: LogicalUnit<f64> = LogicalUnit::new(f64::MAX);
+
+    #[inline]
+    pub const fn new(v: P) -> Self {
+        LogicalUnit(v)
+    }
+}
+
+impl<P: Pixel> LogicalUnit<P> {
+    #[inline]
+    pub fn from_physical<T: Into<PhysicalUnit<X>>, X: Pixel>(
+        physical: T,
+        scale_factor: f64,
+    ) -> Self {
+        physical.into().to_logical(scale_factor)
+    }
+
+    #[inline]
+    pub fn to_physical<X: Pixel>(&self, scale_factor: f64) -> PhysicalUnit<X> {
+        assert!(validate_scale_factor(scale_factor));
+        PhysicalUnit::new(self.0.into() * scale_factor).cast()
+    }
+
+    #[inline]
+    pub fn cast<X: Pixel>(&self) -> LogicalUnit<X> {
+        LogicalUnit(self.0.cast())
+    }
+}
+
+impl<P: Pixel, X: Pixel> From<X> for LogicalUnit<P> {
+    fn from(v: X) -> LogicalUnit<P> {
+        LogicalUnit::new(v.cast())
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for u8 {
+    fn from(v: LogicalUnit<P>) -> u8 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for u16 {
+    fn from(v: LogicalUnit<P>) -> u16 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for u32 {
+    fn from(v: LogicalUnit<P>) -> u32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for i8 {
+    fn from(v: LogicalUnit<P>) -> i8 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for i16 {
+    fn from(v: LogicalUnit<P>) -> i16 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for i32 {
+    fn from(v: LogicalUnit<P>) -> i32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for f32 {
+    fn from(v: LogicalUnit<P>) -> f32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for f64 {
+    fn from(v: LogicalUnit<P>) -> f64 {
+        v.0.cast()
+    }
+}
+
+/// A physical pixel unit.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Default, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub struct PhysicalUnit<P>(pub P);
+
+impl<P> PhysicalUnit<P> {
+    /// Represents a minimum physical unit of [`f64::MAX`].
+    pub const MIN: LogicalUnit<f64> = LogicalUnit::new(f64::MIN);
+    /// Represents a physical unit of `0_f64`.
+    pub const ZERO: LogicalUnit<f64> = LogicalUnit::new(0.0);
+    /// Represents a maximum physical unit that is equal to [`f64::MAX`].
+    pub const MAX: LogicalUnit<f64> = LogicalUnit::new(f64::MAX);
+
+    #[inline]
+    pub const fn new(v: P) -> Self {
+        PhysicalUnit(v)
+    }
+}
+
+impl<P: Pixel> PhysicalUnit<P> {
+    #[inline]
+    pub fn from_logical<T: Into<LogicalUnit<X>>, X: Pixel>(logical: T, scale_factor: f64) -> Self {
+        logical.into().to_physical(scale_factor)
+    }
+
+    #[inline]
+    pub fn to_logical<X: Pixel>(&self, scale_factor: f64) -> LogicalUnit<X> {
+        assert!(validate_scale_factor(scale_factor));
+        LogicalUnit::new(self.0.into() * scale_factor).cast()
+    }
+
+    #[inline]
+    pub fn cast<X: Pixel>(&self) -> PhysicalUnit<X> {
+        PhysicalUnit(self.0.cast())
+    }
+}
+
+impl<P: Pixel, X: Pixel> From<X> for PhysicalUnit<P> {
+    fn from(v: X) -> PhysicalUnit<P> {
+        PhysicalUnit::new(v.cast())
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for u8 {
+    fn from(v: PhysicalUnit<P>) -> u8 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for u16 {
+    fn from(v: PhysicalUnit<P>) -> u16 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for u32 {
+    fn from(v: PhysicalUnit<P>) -> u32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for i8 {
+    fn from(v: PhysicalUnit<P>) -> i8 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for i16 {
+    fn from(v: PhysicalUnit<P>) -> i16 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for i32 {
+    fn from(v: PhysicalUnit<P>) -> i32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for f32 {
+    fn from(v: PhysicalUnit<P>) -> f32 {
+        v.0.cast()
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for f64 {
+    fn from(v: PhysicalUnit<P>) -> f64 {
+        v.0.cast()
+    }
+}
+
+/// A pixel unit that's either physical or logical.
+pub enum PixelUnit {
+    Physical(PhysicalUnit<i32>),
+    Logical(LogicalUnit<f64>),
+}
+
+impl PixelUnit {
+    /// Represents a minimum logical unit of [`f64::MAX`].
+    pub const MIN: PixelUnit = PixelUnit::Logical(LogicalUnit::new(f64::MIN));
+    /// Represents a logical unit of `0_f64`.
+    pub const ZERO: PixelUnit = PixelUnit::Logical(LogicalUnit::new(0.0));
+    /// Represents a maximum logical unit that is equal to [`f64::MAX`].
+    pub const MAX: PixelUnit = PixelUnit::Logical(LogicalUnit::new(f64::MAX));
+
+    pub fn new<S: Into<PixelUnit>>(unit: S) -> PixelUnit {
+        unit.into()
+    }
+
+    pub fn to_logical<P: Pixel>(&self, scale_factor: f64) -> LogicalUnit<P> {
+        match *self {
+            PixelUnit::Physical(unit) => unit.to_logical(scale_factor),
+            PixelUnit::Logical(unit) => unit.cast(),
+        }
+    }
+
+    pub fn to_physical<P: Pixel>(&self, scale_factor: f64) -> PhysicalUnit<P> {
+        match *self {
+            PixelUnit::Physical(unit) => unit.cast(),
+            PixelUnit::Logical(unit) => unit.to_physical(scale_factor),
+        }
+    }
+}
+
+impl<P: Pixel> From<PhysicalUnit<P>> for PixelUnit {
+    #[inline]
+    fn from(unit: PhysicalUnit<P>) -> PixelUnit {
+        PixelUnit::Physical(unit.cast())
+    }
+}
+
+impl<P: Pixel> From<LogicalUnit<P>> for PixelUnit {
+    #[inline]
+    fn from(unit: LogicalUnit<P>) -> PixelUnit {
+        PixelUnit::Logical(unit.cast())
+    }
+}
+
 /// A position represented in logical pixels.
 ///
 /// The position is stored as floats, so please be careful. Casting floats to integers truncates the
-/// fractional part, which can cause noticable issues. To help with that, an `Into<(i32, i32)>`
+/// fractional part, which can cause noticeable issues. To help with that, an `Into<(i32, i32)>`
 /// implementation is provided which does the rounding for you.
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Ord, PartialOrd, Default, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
@@ -584,15 +782,13 @@ impl<P: Pixel> From<LogicalPosition<P>> for Position {
 
 #[cfg(test)]
 mod tests {
-    use crate::dpi;
+    use super::*;
     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,
@@ -661,8 +857,6 @@ mod tests {
     ($($name:ident => $ty:ty),*) => {$(
         #[test]
         fn $name() {
-            use dpi::Pixel;
-
             assert_approx_eq!(
                 <$ty as Pixel>::from_f64(37.0),
                 37.0,
@@ -755,46 +949,77 @@ mod tests {
 
     #[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!(validate_scale_factor(1.0));
+        assert!(validate_scale_factor(2.0));
+        assert!(validate_scale_factor(3.0));
+        assert!(validate_scale_factor(1.5));
+        assert!(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));
+        assert!(!validate_scale_factor(0.0));
+        assert!(!validate_scale_factor(-1.0));
+        assert!(!validate_scale_factor(f64::INFINITY));
+        assert!(!validate_scale_factor(f64::NAN));
+        assert!(!validate_scale_factor(f64::NEG_INFINITY));
+    }
+
+    #[test]
+    fn test_logical_unity() {
+        let log_unit = LogicalUnit::new(1.0);
+        assert_eq!(log_unit.to_physical::<u32>(1.0), PhysicalUnit::new(1));
+        assert_eq!(log_unit.to_physical::<u32>(2.0), PhysicalUnit::new(2));
+        assert_eq!(log_unit.cast::<u32>(), LogicalUnit::new(1));
+        assert_eq!(
+            log_unit,
+            LogicalUnit::from_physical(PhysicalUnit::new(1.0), 1.0)
+        );
+        assert_eq!(
+            log_unit,
+            LogicalUnit::from_physical(PhysicalUnit::new(2.0), 2.0)
+        );
+        assert_eq!(LogicalUnit::from(2.0), LogicalUnit::new(2.0));
+
+        let x: f64 = log_unit.into();
+        assert_eq!(x, 1.0);
+    }
+
+    #[test]
+    fn test_physical_unit() {
+        assert_eq!(
+            PhysicalUnit::from_logical(LogicalUnit::new(1.0), 1.0),
+            PhysicalUnit::new(1)
+        );
+        assert_eq!(
+            PhysicalUnit::from_logical(LogicalUnit::new(2.0), 0.5),
+            PhysicalUnit::new(1)
+        );
+        assert_eq!(PhysicalUnit::from(2.0), PhysicalUnit::new(2.0,));
+        assert_eq!(PhysicalUnit::from(2.0), PhysicalUnit::new(2.0));
+
+        let x: f64 = PhysicalUnit::new(1).into();
+        assert_eq!(x, 1.0);
     }
 
     #[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));
+        let log_pos = LogicalPosition::new(1.0, 2.0);
+        assert_eq!(log_pos.to_physical::<u32>(1.0), PhysicalPosition::new(1, 2));
+        assert_eq!(log_pos.to_physical::<u32>(2.0), PhysicalPosition::new(2, 4));
+        assert_eq!(log_pos.cast::<u32>(), LogicalPosition::new(1, 2));
         assert_eq!(
             log_pos,
-            dpi::LogicalPosition::from_physical(dpi::PhysicalPosition::new(1.0, 2.0), 1.0)
+            LogicalPosition::from_physical(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)
+            LogicalPosition::from_physical(PhysicalPosition::new(2.0, 4.0), 2.0)
         );
         assert_eq!(
-            dpi::LogicalPosition::from((2.0, 2.0)),
-            dpi::LogicalPosition::new(2.0, 2.0)
+            LogicalPosition::from((2.0, 2.0)),
+            LogicalPosition::new(2.0, 2.0)
         );
         assert_eq!(
-            dpi::LogicalPosition::from([2.0, 3.0]),
-            dpi::LogicalPosition::new(2.0, 3.0)
+            LogicalPosition::from([2.0, 3.0]),
+            LogicalPosition::new(2.0, 3.0)
         );
 
         let x: (f64, f64) = log_pos.into();
@@ -806,56 +1031,44 @@ mod tests {
     #[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)
+            PhysicalPosition::from_logical(LogicalPosition::new(1.0, 2.0), 1.0),
+            PhysicalPosition::new(1, 2)
         );
         assert_eq!(
-            dpi::PhysicalPosition::from_logical(dpi::LogicalPosition::new(2.0, 4.0), 0.5),
-            dpi::PhysicalPosition::new(1, 2)
+            PhysicalPosition::from_logical(LogicalPosition::new(2.0, 4.0), 0.5),
+            PhysicalPosition::new(1, 2)
         );
         assert_eq!(
-            dpi::PhysicalPosition::from((2.0, 2.0)),
-            dpi::PhysicalPosition::new(2.0, 2.0)
+            PhysicalPosition::from((2.0, 2.0)),
+            PhysicalPosition::new(2.0, 2.0)
         );
         assert_eq!(
-            dpi::PhysicalPosition::from([2.0, 3.0]),
-            dpi::PhysicalPosition::new(2.0, 3.0)
+            PhysicalPosition::from([2.0, 3.0]),
+            PhysicalPosition::new(2.0, 3.0)
         );
 
-        let x: (f64, f64) = dpi::PhysicalPosition::new(1, 2).into();
+        let x: (f64, f64) = PhysicalPosition::new(1, 2).into();
         assert_eq!(x, (1.0, 2.0));
-        let x: [f64; 2] = dpi::PhysicalPosition::new(1, 2).into();
+        let x: [f64; 2] = 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));
+        let log_size = LogicalSize::new(1.0, 2.0);
+        assert_eq!(log_size.to_physical::<u32>(1.0), PhysicalSize::new(1, 2));
+        assert_eq!(log_size.to_physical::<u32>(2.0), PhysicalSize::new(2, 4));
+        assert_eq!(log_size.cast::<u32>(), LogicalSize::new(1, 2));
         assert_eq!(
             log_size,
-            dpi::LogicalSize::from_physical(dpi::PhysicalSize::new(1.0, 2.0), 1.0)
+            LogicalSize::from_physical(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)
+            LogicalSize::from_physical(PhysicalSize::new(2.0, 4.0), 2.0)
         );
+        assert_eq!(LogicalSize::from((2.0, 2.0)), LogicalSize::new(2.0, 2.0));
+        assert_eq!(LogicalSize::from([2.0, 3.0]), LogicalSize::new(2.0, 3.0));
 
         let x: (f64, f64) = log_size.into();
         assert_eq!(x, (1.0, 2.0));
@@ -866,136 +1079,130 @@ mod tests {
     #[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)
+            PhysicalSize::from_logical(LogicalSize::new(1.0, 2.0), 1.0),
+            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)
+            PhysicalSize::from_logical(LogicalSize::new(2.0, 4.0), 0.5),
+            PhysicalSize::new(1, 2)
         );
+        assert_eq!(PhysicalSize::from((2.0, 2.0)), PhysicalSize::new(2.0, 2.0));
+        assert_eq!(PhysicalSize::from([2.0, 3.0]), PhysicalSize::new(2.0, 3.0));
 
-        let x: (f64, f64) = dpi::PhysicalSize::new(1, 2).into();
+        let x: (f64, f64) = PhysicalSize::new(1, 2).into();
         assert_eq!(x, (1.0, 2.0));
-        let x: [f64; 2] = dpi::PhysicalSize::new(1, 2).into();
+        let x: [f64; 2] = 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))
+            Size::new(PhysicalSize::new(1, 2)),
+            Size::Physical(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))
+            Size::new(LogicalSize::new(1.0, 2.0)),
+            Size::Logical(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)
+            Size::new(PhysicalSize::new(1, 2)).to_logical::<f64>(1.0),
+            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)
+            Size::new(PhysicalSize::new(1, 2)).to_logical::<f64>(2.0),
+            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)
+            Size::new(LogicalSize::new(1.0, 2.0)).to_logical::<f64>(1.0),
+            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)
+            Size::new(PhysicalSize::new(1, 2)).to_physical::<u32>(1.0),
+            PhysicalSize::new(1, 2)
         );
         assert_eq!(
-            dpi::Size::new(dpi::PhysicalSize::new(1, 2)).to_physical::<u32>(2.0),
-            dpi::PhysicalSize::new(1, 2)
+            Size::new(PhysicalSize::new(1, 2)).to_physical::<u32>(2.0),
+            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)
+            Size::new(LogicalSize::new(1.0, 2.0)).to_physical::<u32>(1.0),
+            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)
+            Size::new(LogicalSize::new(1.0, 2.0)).to_physical::<u32>(2.0),
+            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);
+        let small = Size::Physical((1, 2).into());
+        let medium = Size::Logical((3, 4).into());
+        let medium_physical = Size::new(medium.to_physical::<u32>(1.0));
+        let large = Size::Physical((5, 6).into());
+        assert_eq!(Size::clamp(medium, small, large, 1.0), medium_physical);
+        assert_eq!(Size::clamp(small, medium, large, 1.0), medium_physical);
+        assert_eq!(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))
+            Position::new(PhysicalPosition::new(1, 2)),
+            Position::Physical(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))
+            Position::new(LogicalPosition::new(1.0, 2.0)),
+            Position::Logical(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)
+            Position::new(PhysicalPosition::new(1, 2)).to_logical::<f64>(1.0),
+            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)
+            Position::new(PhysicalPosition::new(1, 2)).to_logical::<f64>(2.0),
+            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)
+            Position::new(LogicalPosition::new(1.0, 2.0)).to_logical::<f64>(1.0),
+            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)
+            Position::new(PhysicalPosition::new(1, 2)).to_physical::<u32>(1.0),
+            PhysicalPosition::new(1, 2)
         );
         assert_eq!(
-            dpi::Position::new(dpi::PhysicalPosition::new(1, 2)).to_physical::<u32>(2.0),
-            dpi::PhysicalPosition::new(1, 2)
+            Position::new(PhysicalPosition::new(1, 2)).to_physical::<u32>(2.0),
+            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)
+            Position::new(LogicalPosition::new(1.0, 2.0)).to_physical::<u32>(1.0),
+            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)
+            Position::new(LogicalPosition::new(1.0, 2.0)).to_physical::<u32>(2.0),
+            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!("{:?}", LogicalPosition::<u32>::default().clone());
+        HashSet::new().insert(LogicalPosition::<u32>::default());
 
-        let _ = format!("{:?}", dpi::PhysicalPosition::<u32>::default().clone());
-        HashSet::new().insert(dpi::PhysicalPosition::<u32>::default());
+        let _ = format!("{:?}", PhysicalPosition::<u32>::default().clone());
+        HashSet::new().insert(PhysicalPosition::<u32>::default());
 
-        let _ = format!("{:?}", dpi::LogicalSize::<u32>::default().clone());
-        HashSet::new().insert(dpi::LogicalSize::<u32>::default());
+        let _ = format!("{:?}", LogicalSize::<u32>::default().clone());
+        HashSet::new().insert(LogicalSize::<u32>::default());
 
-        let _ = format!("{:?}", dpi::PhysicalSize::<u32>::default().clone());
-        HashSet::new().insert(dpi::PhysicalSize::<u32>::default());
+        let _ = format!("{:?}", PhysicalSize::<u32>::default().clone());
+        HashSet::new().insert(PhysicalSize::<u32>::default());
 
-        let _ = format!("{:?}", dpi::Size::Physical((1, 2).into()).clone());
-        let _ = format!("{:?}", dpi::Position::Physical((1, 2).into()).clone());
+        let _ = format!("{:?}", Size::Physical((1, 2).into()).clone());
+        let _ = format!("{:?}", Position::Physical((1, 2).into()).clone());
     }
 }

examples/child_window.rs

@@ -1,10 +1,3 @@
-#[cfg(all(
-    feature = "rwh_06",
-    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)
@@ -13,58 +6,57 @@ mod fill;
 fn main() -> Result<(), impl std::error::Error> {
     use std::collections::HashMap;
 
-    use winit::{
-        dpi::{LogicalPosition, LogicalSize, Position},
-        event::{ElementState, Event, KeyEvent, WindowEvent},
-        event_loop::{EventLoop, EventLoopWindowTarget},
-        raw_window_handle::HasRawWindowHandle,
-        window::{Window, WindowBuilder, WindowId},
-    };
+    use winit::dpi::{LogicalPosition, LogicalSize, Position};
+    use winit::event::{ElementState, Event, KeyEvent, WindowEvent};
+    use winit::event_loop::{ActiveEventLoop, EventLoop};
+    use winit::raw_window_handle::HasRawWindowHandle;
+    use winit::window::Window;
 
-    fn spawn_child_window(
-        parent: &Window,
-        event_loop: &EventLoopWindowTarget<()>,
-        windows: &mut HashMap<WindowId, Window>,
-    ) {
+    #[path = "util/fill.rs"]
+    mod fill;
+
+    fn spawn_child_window(parent: &Window, event_loop: &ActiveEventLoop) -> Window {
         let parent = parent.raw_window_handle().unwrap();
-        let mut builder = WindowBuilder::new()
+        let mut window_attributes = Window::default_attributes()
             .with_title("child window")
             .with_inner_size(LogicalSize::new(200.0f32, 200.0f32))
             .with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
             .with_visible(true);
         // `with_parent_window` is unsafe. Parent window must be a valid window.
-        builder = unsafe { builder.with_parent_window(Some(parent)) };
-        let child_window = builder.build(event_loop).unwrap();
+        window_attributes = unsafe { window_attributes.with_parent_window(Some(parent)) };
 
-        let id = child_window.id();
-        windows.insert(id, child_window);
-        println!("child window created with id: {id:?}");
+        event_loop.create_window(window_attributes).unwrap()
     }
 
     let mut windows = HashMap::new();
 
     let event_loop: EventLoop<()> = EventLoop::new().unwrap();
-    let parent_window = WindowBuilder::new()
-        .with_title("parent window")
-        .with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
-        .with_inner_size(LogicalSize::new(640.0f32, 480.0f32))
-        .build(&event_loop)
-        .unwrap();
+    let mut parent_window_id = None;
 
-    println!("parent window: {parent_window:?})");
+    event_loop.run(move |event: Event<()>, event_loop| {
+        match event {
+            Event::Resumed => {
+                let attributes = Window::default_attributes()
+                    .with_title("parent window")
+                    .with_position(Position::Logical(LogicalPosition::new(0.0, 0.0)))
+                    .with_inner_size(LogicalSize::new(640.0f32, 480.0f32));
+                let window = event_loop.create_window(attributes).unwrap();
 
-    event_loop.run(move |event: Event<()>, elwt| {
-        if let Event::WindowEvent { event, window_id } = event {
-            match event {
+                parent_window_id = Some(window.id());
+
+                println!("Parent window id: {parent_window_id:?})");
+                windows.insert(window.id(), window);
+            }
+            Event::WindowEvent { window_id, event } => match event {
                 WindowEvent::CloseRequested => {
                     windows.clear();
-                    elwt.exit();
+                    event_loop.exit();
                 }
                 WindowEvent::CursorEntered { device_id: _ } => {
                     // On x11, println when the cursor entered in a window even if the child window is created
                     // by some key inputs.
                     // the child windows are always placed at (0, 0) with size (200, 200) in the parent window,
-                    // so we also can see this log when we move the cursor arround (200, 200) in parent window.
+                    // so we also can see this log when we move the cursor around (200, 200) in parent window.
                     println!("cursor entered in the window {window_id:?}");
                 }
                 WindowEvent::KeyboardInput {
@@ -75,7 +67,11 @@ fn main() -> Result<(), impl std::error::Error> {
                         },
                     ..
                 } => {
-                    spawn_child_window(&parent_window, elwt, &mut windows);
+                    let parent_window = windows.get(&parent_window_id.unwrap()).unwrap();
+                    let child_window = spawn_child_window(parent_window, event_loop);
+                    let child_id = child_window.id();
+                    println!("Child window created with id: {child_id:?}");
+                    windows.insert(child_id, child_window);
                 }
                 WindowEvent::RedrawRequested => {
                     if let Some(window) = windows.get(&window_id) {
@@ -83,15 +79,16 @@ fn main() -> Result<(), impl std::error::Error> {
                     }
                 }
                 _ => (),
-            }
+            },
+            _ => (),
         }
     })
 }
 
-#[cfg(not(all(
+#[cfg(all(
     feature = "rwh_06",
-    any(x11_platform, macos_platform, windows_platform)
-)))]
+    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.");
 }

examples/control_flow.rs

@@ -1,34 +1,34 @@
 #![allow(clippy::single_match)]
 
 use std::thread;
-#[cfg(not(wasm_platform))]
+#[cfg(not(web_platform))]
 use std::time;
-#[cfg(wasm_platform)]
+
+#[cfg(web_platform)]
 use web_time as time;
 
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::{ControlFlow, EventLoop},
-    keyboard::{Key, NamedKey},
-    window::WindowBuilder,
-};
+use winit::application::ApplicationHandler;
+use winit::event::{ElementState, KeyEvent, StartCause, WindowEvent};
+use winit::event_loop::{ActiveEventLoop, ControlFlow, EventLoop};
+use winit::keyboard::{Key, NamedKey};
+use winit::window::{Window, WindowId};
 
 #[path = "util/fill.rs"]
 mod fill;
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+const WAIT_TIME: time::Duration = time::Duration::from_millis(100);
+const POLL_SLEEP_TIME: time::Duration = time::Duration::from_millis(100);
+
+#[derive(Default, Debug, Clone, Copy, PartialEq, Eq)]
 enum Mode {
+    #[default]
     Wait,
     WaitUntil,
     Poll,
 }
 
-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> {
-    SimpleLogger::new().init().unwrap();
+    tracing_subscriber::fmt::init();
 
     println!("Press '1' to switch to Wait mode.");
     println!("Press '2' to switch to WaitUntil mode.");
@@ -37,92 +37,111 @@ fn main() -> Result<(), impl std::error::Error> {
     println!("Press 'Esc' to close the window.");
 
     let event_loop = EventLoop::new().unwrap();
-    let window = WindowBuilder::new()
-        .with_title("Press 1, 2, 3 to change control flow mode. Press R to toggle redraw requests.")
-        .build(&event_loop)
-        .unwrap();
 
-    let mut mode = Mode::Wait;
-    let mut request_redraw = false;
-    let mut wait_cancelled = false;
-    let mut close_requested = false;
+    let mut app = ControlFlowDemo::default();
+    event_loop.run_app(&mut app)
+}
 
-    event_loop.run(move |event, elwt| {
-        use winit::event::StartCause;
+#[derive(Default)]
+struct ControlFlowDemo {
+    mode: Mode,
+    request_redraw: bool,
+    wait_cancelled: bool,
+    close_requested: bool,
+    window: Option<Window>,
+}
+
+impl ApplicationHandler for ControlFlowDemo {
+    fn new_events(&mut self, _event_loop: &ActiveEventLoop, cause: StartCause) {
+        println!("new_events: {cause:?}");
+
+        self.wait_cancelled = match cause {
+            StartCause::WaitCancelled { .. } => self.mode == Mode::WaitUntil,
+            _ => false,
+        }
+    }
+
+    fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+        let window_attributes = Window::default_attributes().with_title(
+            "Press 1, 2, 3 to change control flow mode. Press R to toggle redraw requests.",
+        );
+        self.window = Some(event_loop.create_window(window_attributes).unwrap());
+    }
+
+    fn window_event(
+        &mut self,
+        _event_loop: &ActiveEventLoop,
+        _window_id: WindowId,
+        event: WindowEvent,
+    ) {
         println!("{event:?}");
+
         match event {
-            Event::NewEvents(start_cause) => {
-                wait_cancelled = match start_cause {
-                    StartCause::WaitCancelled { .. } => mode == Mode::WaitUntil,
-                    _ => false,
-                }
+            WindowEvent::CloseRequested => {
+                self.close_requested = true;
             }
-            Event::WindowEvent { event, .. } => match event {
-                WindowEvent::CloseRequested => {
-                    close_requested = true;
+            WindowEvent::KeyboardInput {
+                event:
+                    KeyEvent {
+                        logical_key: key,
+                        state: ElementState::Pressed,
+                        ..
+                    },
+                ..
+            } => match key.as_ref() {
+                // WARNING: Consider using `key_without_modifiers()` if available on your platform.
+                // See the `key_binding` example
+                Key::Character("1") => {
+                    self.mode = Mode::Wait;
+                    println!("\nmode: {:?}\n", self.mode);
                 }
-                WindowEvent::KeyboardInput {
-                    event:
-                        KeyEvent {
-                            logical_key: key,
-                            state: ElementState::Pressed,
-                            ..
-                        },
-                    ..
-                } => match key.as_ref() {
-                    // WARNING: Consider using `key_without_modifers()` if available on your platform.
-                    // See the `key_binding` example
-                    Key::Character("1") => {
-                        mode = Mode::Wait;
-                        println!("\nmode: {mode:?}\n");
-                    }
-                    Key::Character("2") => {
-                        mode = Mode::WaitUntil;
-                        println!("\nmode: {mode:?}\n");
-                    }
-                    Key::Character("3") => {
-                        mode = Mode::Poll;
-                        println!("\nmode: {mode:?}\n");
-                    }
-                    Key::Character("r") => {
-                        request_redraw = !request_redraw;
-                        println!("\nrequest_redraw: {request_redraw}\n");
-                    }
-                    Key::Named(NamedKey::Escape) => {
-                        close_requested = true;
-                    }
-                    _ => (),
-                },
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
+                Key::Character("2") => {
+                    self.mode = Mode::WaitUntil;
+                    println!("\nmode: {:?}\n", self.mode);
+                }
+                Key::Character("3") => {
+                    self.mode = Mode::Poll;
+                    println!("\nmode: {:?}\n", self.mode);
+                }
+                Key::Character("r") => {
+                    self.request_redraw = !self.request_redraw;
+                    println!("\nrequest_redraw: {}\n", self.request_redraw);
+                }
+                Key::Named(NamedKey::Escape) => {
+                    self.close_requested = true;
                 }
                 _ => (),
             },
-            Event::AboutToWait => {
-                if request_redraw && !wait_cancelled && !close_requested {
-                    window.request_redraw();
-                }
-
-                match mode {
-                    Mode::Wait => elwt.set_control_flow(ControlFlow::Wait),
-                    Mode::WaitUntil => {
-                        if !wait_cancelled {
-                            elwt.set_control_flow(ControlFlow::WaitUntil(
-                                time::Instant::now() + WAIT_TIME,
-                            ));
-                        }
-                    }
-                    Mode::Poll => {
-                        thread::sleep(POLL_SLEEP_TIME);
-                        elwt.set_control_flow(ControlFlow::Poll);
-                    }
-                };
-
-                if close_requested {
-                    elwt.exit();
-                }
+            WindowEvent::RedrawRequested => {
+                let window = self.window.as_ref().unwrap();
+                window.pre_present_notify();
+                fill::fill_window(window);
             }
             _ => (),
         }
-    })
+    }
+
+    fn about_to_wait(&mut self, event_loop: &ActiveEventLoop) {
+        if self.request_redraw && !self.wait_cancelled && !self.close_requested {
+            self.window.as_ref().unwrap().request_redraw();
+        }
+
+        match self.mode {
+            Mode::Wait => event_loop.set_control_flow(ControlFlow::Wait),
+            Mode::WaitUntil => {
+                if !self.wait_cancelled {
+                    event_loop
+                        .set_control_flow(ControlFlow::WaitUntil(time::Instant::now() + WAIT_TIME));
+                }
+            }
+            Mode::Poll => {
+                thread::sleep(POLL_SLEEP_TIME);
+                event_loop.set_control_flow(ControlFlow::Poll);
+            }
+        };
+
+        if self.close_requested {
+            event_loop.exit();
+        }
+    }
 }

examples/cursor.rs

@@ -1,88 +0,0 @@
-#![allow(clippy::single_match)]
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::EventLoop,
-    window::{CursorIcon, WindowBuilder},
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    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;
-                    }
-                }
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
-                WindowEvent::CloseRequested => {
-                    elwt.exit();
-                }
-                _ => (),
-            }
-        }
-    })
-}
-
-const CURSORS: &[CursorIcon] = &[
-    CursorIcon::Default,
-    CursorIcon::Crosshair,
-    CursorIcon::Pointer,
-    CursorIcon::Move,
-    CursorIcon::Text,
-    CursorIcon::Wait,
-    CursorIcon::Help,
-    CursorIcon::Progress,
-    CursorIcon::NotAllowed,
-    CursorIcon::ContextMenu,
-    CursorIcon::Cell,
-    CursorIcon::VerticalText,
-    CursorIcon::Alias,
-    CursorIcon::Copy,
-    CursorIcon::NoDrop,
-    CursorIcon::Grab,
-    CursorIcon::Grabbing,
-    CursorIcon::AllScroll,
-    CursorIcon::ZoomIn,
-    CursorIcon::ZoomOut,
-    CursorIcon::EResize,
-    CursorIcon::NResize,
-    CursorIcon::NeResize,
-    CursorIcon::NwResize,
-    CursorIcon::SResize,
-    CursorIcon::SeResize,
-    CursorIcon::SwResize,
-    CursorIcon::WResize,
-    CursorIcon::EwResize,
-    CursorIcon::NsResize,
-    CursorIcon::NeswResize,
-    CursorIcon::NwseResize,
-    CursorIcon::ColResize,
-    CursorIcon::RowResize,
-];

examples/cursor_grab.rs

@@ -1,73 +0,0 @@
-#![allow(clippy::single_match)]
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{DeviceEvent, ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::{Key, ModifiersState, NamedKey},
-    window::{CursorGrabMode, WindowBuilder},
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("Super Cursor Grab'n'Hide Simulator 9000")
-        .build(&event_loop)
-        .unwrap();
-
-    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::Named(NamedKey::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());
-                            Ok(())
-                        }
-                        _ => Ok(()),
-                    },
-                    _ => Ok(()),
-                };
-
-                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"),
-            },
-            _ => (),
-        },
-        _ => (),
-    })
-}

examples/custom_events.rs

@@ -1,62 +0,0 @@
-#![allow(clippy::single_match)]
-
-#[cfg(not(wasm_platform))]
-fn main() -> Result<(), impl std::error::Error> {
-    use simple_logger::SimpleLogger;
-    use winit::{
-        event::{Event, WindowEvent},
-        event_loop::EventLoopBuilder,
-        window::WindowBuilder,
-    };
-
-    #[path = "util/fill.rs"]
-    mod fill;
-
-    #[derive(Debug, Clone, Copy)]
-    enum CustomEvent {
-        Timer,
-    }
-
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoopBuilder::<CustomEvent>::with_user_event()
-        .build()
-        .unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("A fantastic window!")
-        .build(&event_loop)
-        .unwrap();
-
-    // `EventLoopProxy` allows you to dispatch custom events to the main Winit event
-    // loop from any thread.
-    let event_loop_proxy = event_loop.create_proxy();
-
-    std::thread::spawn(move || {
-        // Wake up the `event_loop` once every second and dispatch a custom event
-        // from a different thread.
-        loop {
-            std::thread::sleep(std::time::Duration::from_secs(1));
-            event_loop_proxy.send_event(CustomEvent::Timer).ok();
-        }
-    });
-
-    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);
-        }
-        _ => (),
-    })
-}
-
-#[cfg(wasm_platform)]
-fn main() {
-    panic!("This example is not supported on web.");
-}

examples/drag_window.rs

@@ -1,105 +0,0 @@
-#![allow(clippy::single_match)]
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{ElementState, Event, KeyEvent, MouseButton, StartCause, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::Key,
-    window::{Window, WindowBuilder, WindowId},
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    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::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, .. } => {
-                let window = if (window_id == window_1.id() && switched)
-                    || (window_id == window_2.id() && !switched)
-                {
-                    &window_2
-                } else {
-                    &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);
-                        }
-                    }
-                    _ => (),
-                }
-            }
-            WindowEvent::CursorEntered { .. } => {
-                entered_id = window_id;
-                name_windows(entered_id, switched, &window_1, &window_2)
-            }
-            WindowEvent::KeyboardInput {
-                event:
-                    KeyEvent {
-                        state: ElementState::Released,
-                        logical_key: Key::Character(c),
-                        ..
-                    },
-                ..
-            } => 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);
-                }
-            }
-            _ => (),
-        },
-
-        _ => (),
-    })
-}
-
-fn name_windows(window_id: WindowId, switched: bool, window_1: &Window, window_2: &Window) {
-    let (drag_target, other) =
-        if (window_id == window_1.id() && switched) || (window_id == window_2.id() && !switched) {
-            (&window_2, &window_1)
-        } else {
-            (&window_1, &window_2)
-        };
-    drag_target.set_title("drag target");
-    other.set_title("winit window");
-}

examples/focus.rs

@@ -1,56 +0,0 @@
-#![allow(clippy::single_match)]
-
-//! Example for focusing a window.
-
-use simple_logger::SimpleLogger;
-#[cfg(not(wasm_platform))]
-use std::time;
-#[cfg(wasm_platform)]
-use web_time as time;
-use winit::{
-    event::{Event, StartCause, WindowEvent},
-    event_loop::EventLoop,
-    window::WindowBuilder,
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("A fantastic window!")
-        .with_inner_size(winit::dpi::LogicalSize::new(128.0, 128.0))
-        .build(&event_loop)
-        .unwrap();
-
-    let mut deadline = time::Instant::now() + time::Duration::from_secs(3);
-    event_loop.run(move |event, elwt| {
-        match event {
-            Event::NewEvents(StartCause::ResumeTimeReached { .. }) => {
-                // Timeout reached; focus the window.
-                println!("Re-focusing the window.");
-                deadline += time::Duration::from_secs(3);
-                window.focus_window();
-            }
-            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 => {
-                window.request_redraw();
-            }
-
-            _ => (),
-        }
-
-        elwt.set_control_flow(winit::event_loop::ControlFlow::WaitUntil(deadline));
-    })
-}

examples/fullscreen.rs

@@ -1,163 +0,0 @@
-#![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, NamedKey};
-use winit::window::{Fullscreen, WindowBuilder};
-
-#[cfg(target_os = "macos")]
-use winit::platform::macos::WindowExtMacOS;
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    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!")
-        .build(&event_loop)
-        .unwrap();
-
-    let mut monitor_index = 0;
-    let mut monitor = event_loop
-        .available_monitors()
-        .next()
-        .expect("no monitor found!");
-    println!("Monitor: {:?}", monitor.name());
-
-    let mut mode_index = 0;
-    let mut mode = monitor.video_modes().next().expect("no mode found");
-    println!("Mode: {mode}");
-
-    println!("Keys:");
-    println!("- Esc\tExit");
-    println!("- F\tToggle exclusive fullscreen mode");
-    println!("- B\tToggle borderless mode");
-    #[cfg(target_os = "macos")]
-    println!("- C\tToggle simple fullscreen mode");
-    println!("- S\tNext screen");
-    println!("- M\tNext mode for this screen");
-    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(),
-                WindowEvent::KeyboardInput {
-                    event:
-                        KeyEvent {
-                            logical_key: key,
-                            state: ElementState::Pressed,
-                            ..
-                        },
-                    ..
-                } => match key {
-                    Key::Named(NamedKey::Escape) => elwt.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() {
-                        "f" | "b" if window.fullscreen().is_some() => {
-                            window.set_fullscreen(None);
-                        }
-                        "f" => {
-                            let fullscreen = Some(Fullscreen::Exclusive(mode.clone()));
-                            println!("Setting mode: {fullscreen:?}");
-                            window.set_fullscreen(fullscreen);
-                        }
-                        "b" => {
-                            let fullscreen = Some(Fullscreen::Borderless(Some(monitor.clone())));
-                            println!("Setting mode: {fullscreen:?}");
-                            window.set_fullscreen(fullscreen);
-                        }
-                        #[cfg(target_os = "macos")]
-                        "c" => {
-                            window.set_simple_fullscreen(!window.simple_fullscreen());
-                        }
-                        "s" => {
-                            monitor_index += 1;
-                            if let Some(mon) = elwt.available_monitors().nth(monitor_index) {
-                                monitor = mon;
-                            } else {
-                                monitor_index = 0;
-                                monitor =
-                                    elwt.available_monitors().next().expect("no monitor found!");
-                            }
-                            println!("Monitor: {:?}", monitor.name());
-
-                            mode_index = 0;
-                            mode = monitor.video_modes().next().expect("no mode found");
-                            println!("Mode: {mode}");
-                        }
-                        "m" => {
-                            mode_index += 1;
-                            if let Some(m) = monitor.video_modes().nth(mode_index) {
-                                mode = m;
-                            } else {
-                                mode_index = 0;
-                                mode = monitor.video_modes().next().expect("no mode found");
-                            }
-                            println!("Mode: {mode}");
-                        }
-                        "d" => {
-                            decorations = !decorations;
-                            window.set_decorations(decorations);
-                        }
-                        "x" => {
-                            let is_maximized = window.is_maximized();
-                            window.set_maximized(!is_maximized);
-                        }
-                        "z" => {
-                            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);
-                }
-                _ => (),
-            }
-        }
-    })
-}

examples/handling_close.rs

@@ -1,86 +0,0 @@
-#![allow(clippy::single_match)]
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::Key,
-    window::WindowBuilder,
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("Your faithful window")
-        .build(&event_loop)
-        .unwrap();
-
-    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.
-
-                    // 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;
-
-                    // 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.
-                                elwt.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);
-                }
-                _ => (),
-            }
-        }
-    })
-}

examples/ime.rs

@@ -1,94 +0,0 @@
-#![allow(clippy::single_match)]
-
-use log::LevelFilter;
-use simple_logger::SimpleLogger;
-use winit::{
-    dpi::{PhysicalPosition, PhysicalSize},
-    event::{ElementState, Event, Ime, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::NamedKey,
-    window::{ImePurpose, WindowBuilder},
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new()
-        .with_level(LevelFilter::Trace)
-        .init()
-        .unwrap();
-
-    println!("IME position will system default");
-    println!("Click to set IME position to cursor's");
-    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 window = WindowBuilder::new()
-        .with_inner_size(winit::dpi::LogicalSize::new(256f64, 128f64))
-        .build(&event_loop)
-        .unwrap();
-
-    let mut ime_purpose = ImePurpose::Normal;
-    let mut ime_allowed = true;
-    window.set_ime_allowed(ime_allowed);
-
-    let mut may_show_ime = false;
-    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.logical_key == NamedKey::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 == NamedKey::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);
-                }
-                _ => (),
-            }
-        }
-    })
-}

examples/key_binding.rs

@@ -1,62 +0,0 @@
-#![allow(clippy::single_match)]
-
-#[cfg(any(target_os = "macos", target_os = "windows", target_os = "linux"))]
-use winit::{
-    dpi::LogicalSize,
-    event::{ElementState, Event, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::{Key, ModifiersState},
-    // WARNING: This is not available on all platforms (for example on the web).
-    platform::modifier_supplement::KeyEventExtModifierSupplement,
-    window::WindowBuilder,
-};
-
-#[cfg(not(any(target_os = "macos", target_os = "windows", target_os = "linux")))]
-fn main() {
-    println!("This example is not supported on this platform");
-}
-
-#[cfg(any(target_os = "macos", target_os = "windows", target_os = "linux"))]
-fn main() -> Result<(), impl std::error::Error> {
-    #[path = "util/fill.rs"]
-    mod fill;
-
-    simple_logger::SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_inner_size(LogicalSize::new(400.0, 200.0))
-        .build(&event_loop)
-        .unwrap();
-
-    let mut modifiers = ModifiersState::default();
-
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
-                WindowEvent::ModifiersChanged(new) => {
-                    modifiers = new.state();
-                }
-                WindowEvent::KeyboardInput { event, .. } => {
-                    if event.state == ElementState::Pressed && !event.repeat {
-                        match event.key_without_modifiers().as_ref() {
-                            Key::Character("1") => {
-                                if modifiers.shift_key() {
-                                    println!("Shift + 1 | logical_key: {:?}", event.logical_key);
-                                } else {
-                                    println!("1");
-                                }
-                            }
-                            _ => (),
-                        }
-                    }
-                }
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
-                _ => (),
-            }
-        };
-    })
-}

examples/monitor_list.rs

@@ -1,58 +0,0 @@
-#![allow(clippy::single_match)]
-
-use simple_logger::SimpleLogger;
-use winit::dpi::{PhysicalPosition, PhysicalSize};
-use winit::monitor::MonitorHandle;
-use winit::{event_loop::EventLoop, window::WindowBuilder};
-
-fn main() {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-    let window = WindowBuilder::new().build(&event_loop).unwrap();
-
-    if let Some(mon) = window.primary_monitor() {
-        print_info("Primary output", mon);
-    }
-
-    for mon in window.available_monitors() {
-        if Some(&mon) == window.primary_monitor().as_ref() {
-            continue;
-        }
-
-        println!();
-        print_info("Output", mon);
-    }
-}
-
-fn print_info(intro: &str, monitor: MonitorHandle) {
-    if let Some(name) = monitor.name() {
-        println!("{intro}: {name}");
-    } else {
-        println!("{intro}: [no name]");
-    }
-
-    let PhysicalSize { width, height } = monitor.size();
-    print!("  Current mode: {width}x{height}");
-    if let Some(m_hz) = monitor.refresh_rate_millihertz() {
-        println!(" @ {}.{} Hz", m_hz / 1000, m_hz % 1000);
-    } else {
-        println!();
-    }
-
-    let PhysicalPosition { x, y } = monitor.position();
-    println!("  Position: {x},{y}");
-
-    println!("  Scale factor: {}", monitor.scale_factor());
-
-    println!("  Available modes (width x height x bit-depth):");
-    for mode in monitor.video_modes() {
-        let PhysicalSize { width, height } = mode.size();
-        let bits = mode.bit_depth();
-        let m_hz = mode.refresh_rate_millihertz();
-        println!(
-            "    {width}x{height}x{bits} @ {}.{} Hz",
-            m_hz / 1000,
-            m_hz % 1000
-        );
-    }
-}

examples/mouse_wheel.rs

@@ -1,65 +0,0 @@
-#![allow(clippy::single_match)]
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{Event, WindowEvent},
-    event_loop::EventLoop,
-    window::WindowBuilder,
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("Mouse Wheel events")
-        .build(&event_loop)
-        .unwrap();
-
-    println!(
-        r"
-When using so called 'natural scrolling' (scrolling that acts like on a touch screen), this is what to expect:
-
-Moving your finger downwards on a scroll wheel should make the window move down, and you should see a positive Y scroll value.
-
-When moving fingers on a trackpad down and to the right, you should see positive X and Y deltas, and the window should move down and to the right.
-
-With reverse scrolling, you should see the inverse behavior.
-
-In both cases the example window should move like the content of a scroll area in any other application.
-
-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(),
-                WindowEvent::MouseWheel { delta, .. } => match delta {
-                    winit::event::MouseScrollDelta::LineDelta(x, y) => {
-                        println!("mouse wheel Line Delta: ({x},{y})");
-                        let pixels_per_line = 120.0;
-                        let mut pos = window.outer_position().unwrap();
-                        pos.x += (x * pixels_per_line) as i32;
-                        pos.y += (y * pixels_per_line) as i32;
-                        window.set_outer_position(pos)
-                    }
-                    winit::event::MouseScrollDelta::PixelDelta(p) => {
-                        println!("mouse wheel Pixel Delta: ({},{})", p.x, p.y);
-                        let mut pos = window.outer_position().unwrap();
-                        pos.x += p.x as i32;
-                        pos.y += p.y as i32;
-                        window.set_outer_position(pos)
-                    }
-                },
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
-                _ => (),
-            }
-        }
-    })
-}

examples/multithreaded.rs

@@ -1,209 +0,0 @@
-#![allow(clippy::single_match)]
-
-#[cfg(not(wasm_platform))]
-fn main() -> Result<(), impl std::error::Error> {
-    use std::{collections::HashMap, sync::mpsc, thread, time::Duration};
-
-    use simple_logger::SimpleLogger;
-    use winit::{
-        dpi::{PhysicalPosition, PhysicalSize, Position, Size},
-        event::{ElementState, Event, KeyEvent, WindowEvent},
-        event_loop::EventLoop,
-        keyboard::{Key, ModifiersState, NamedKey},
-        window::{CursorGrabMode, CursorIcon, Fullscreen, WindowBuilder, WindowLevel},
-    };
-
-    const WINDOW_COUNT: usize = 3;
-    const WINDOW_SIZE: PhysicalSize<u32> = PhysicalSize::new(600, 400);
-
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-    let mut window_senders = HashMap::with_capacity(WINDOW_COUNT);
-    for _ in 0..WINDOW_COUNT {
-        let window = WindowBuilder::new()
-            .with_inner_size(WINDOW_SIZE)
-            .build(&event_loop)
-            .unwrap();
-
-        let mut video_modes: Vec<_> = window.current_monitor().unwrap().video_modes().collect();
-        let mut video_mode_id = 0usize;
-
-        let (tx, rx) = mpsc::channel();
-        window_senders.insert(window.id(), tx);
-        let mut modifiers = ModifiersState::default();
-        thread::spawn(move || {
-            while let Ok(event) = rx.recv() {
-                match event {
-                    WindowEvent::Moved { .. } => {
-                        // We need to update our chosen video mode if the window
-                        // was moved to an another monitor, so that the window
-                        // appears on this monitor instead when we go fullscreen
-                        let previous_video_mode = video_modes.get(video_mode_id).cloned();
-                        video_modes = window.current_monitor().unwrap().video_modes().collect();
-                        video_mode_id = video_mode_id.min(video_modes.len());
-                        let video_mode = video_modes.get(video_mode_id);
-
-                        // Different monitors may support different video modes,
-                        // and the index we chose previously may now point to a
-                        // completely different video mode, so notify the user
-                        if video_mode != previous_video_mode.as_ref() {
-                            println!(
-                                "Window moved to another monitor, picked video mode: {}",
-                                video_modes.get(video_mode_id).unwrap()
-                            );
-                        }
-                    }
-                    WindowEvent::ModifiersChanged(new) => {
-                        modifiers = new.state();
-                    }
-                    WindowEvent::KeyboardInput {
-                        event:
-                            KeyEvent {
-                                state: ElementState::Released,
-                                logical_key: key,
-                                ..
-                            },
-                        ..
-                    } => {
-                        use NamedKey::{ArrowLeft, ArrowRight};
-                        window.set_title(&format!("{key:?}"));
-                        let state = !modifiers.shift_key();
-                        match key {
-                            // Cycle through video modes
-                            Key::Named(ArrowRight) | Key::Named(ArrowLeft) => {
-                                if key == ArrowLeft {
-                                    video_mode_id = video_mode_id.saturating_sub(1);
-                                } else if key == ArrowRight {
-                                    video_mode_id = (video_modes.len() - 1).min(video_mode_id + 1);
-                                }
-                                println!("Picking video mode: {}", video_modes[video_mode_id]);
-                            }
-                            // 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() {
-                                "1" => window.set_window_level(WindowLevel::AlwaysOnTop),
-                                "2" => window.set_window_level(WindowLevel::AlwaysOnBottom),
-                                "3" => window.set_window_level(WindowLevel::Normal),
-                                "c" => window.set_cursor_icon(match state {
-                                    true => CursorIcon::Progress,
-                                    false => CursorIcon::Default,
-                                }),
-                                "d" => window.set_decorations(!state),
-                                "f" => window.set_fullscreen(match (state, modifiers.alt_key()) {
-                                    (true, false) => Some(Fullscreen::Borderless(None)),
-                                    (true, true) => Some(Fullscreen::Exclusive(
-                                        video_modes[video_mode_id].clone(),
-                                    )),
-                                    (false, _) => None,
-                                }),
-                                "l" if state => {
-                                    if let Err(err) = window.set_cursor_grab(CursorGrabMode::Locked)
-                                    {
-                                        println!("error: {err}");
-                                    }
-                                }
-                                "g" if state => {
-                                    if let Err(err) =
-                                        window.set_cursor_grab(CursorGrabMode::Confined)
-                                    {
-                                        println!("error: {err}");
-                                    }
-                                }
-                                "g" | "l" if !state => {
-                                    if let Err(err) = window.set_cursor_grab(CursorGrabMode::None) {
-                                        println!("error: {err}");
-                                    }
-                                }
-                                "h" => window.set_cursor_visible(!state),
-                                "i" => {
-                                    println!("Info:");
-                                    println!("-> outer_position : {:?}", window.outer_position());
-                                    println!("-> inner_position : {:?}", window.inner_position());
-                                    println!("-> outer_size     : {:?}", window.outer_size());
-                                    println!("-> inner_size     : {:?}", window.inner_size());
-                                    println!("-> fullscreen     : {:?}", window.fullscreen());
-                                }
-                                "l" => window.set_min_inner_size(match state {
-                                    true => Some(WINDOW_SIZE),
-                                    false => None,
-                                }),
-                                "m" => window.set_maximized(state),
-                                "p" => window.set_outer_position({
-                                    let mut position = window.outer_position().unwrap();
-                                    let sign = if state { 1 } else { -1 };
-                                    position.x += 10 * sign;
-                                    position.y += 10 * sign;
-                                    position
-                                }),
-                                "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,
-                                    });
-                                }
-                                "w" => {
-                                    if let Size::Physical(size) = WINDOW_SIZE.into() {
-                                        window
-                                            .set_cursor_position(Position::Physical(
-                                                PhysicalPosition::new(
-                                                    size.width as i32 / 2,
-                                                    size.height as i32 / 2,
-                                                ),
-                                            ))
-                                            .unwrap()
-                                    }
-                                }
-                                "z" => {
-                                    window.set_visible(false);
-                                    thread::sleep(Duration::from_secs(1));
-                                    window.set_visible(true);
-                                }
-                                _ => (),
-                            },
-                            _ => (),
-                        }
-                    }
-                    _ => (),
-                }
-            }
-        });
-    }
-    event_loop.run(move |event, elwt| {
-        if window_senders.is_empty() {
-            elwt.exit()
-        }
-        match event {
-            Event::WindowEvent { event, window_id } => match event {
-                WindowEvent::CloseRequested
-                | WindowEvent::Destroyed
-                | WindowEvent::KeyboardInput {
-                    event:
-                        KeyEvent {
-                            state: ElementState::Released,
-                            logical_key: Key::Named(NamedKey::Escape),
-                            ..
-                        },
-                    ..
-                } => {
-                    window_senders.remove(&window_id);
-                }
-                _ => {
-                    if let Some(tx) = window_senders.get(&window_id) {
-                        tx.send(event).unwrap();
-                    }
-                }
-            },
-            _ => {}
-        }
-    })
-}
-
-#[cfg(wasm_platform)]
-fn main() {
-    panic!("Example not supported on Wasm");
-}

examples/multiwindow.rs

@@ -1,64 +0,0 @@
-#![allow(clippy::single_match)]
-
-use std::collections::HashMap;
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{ElementState, Event, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::{Key, NamedKey},
-    window::Window,
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let mut windows = HashMap::new();
-    for _ in 0..3 {
-        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::KeyboardInput {
-                    event,
-                    is_synthetic: false,
-                    ..
-                } if event.state == ElementState::Pressed => match event.logical_key {
-                    Key::Named(NamedKey::Escape) => elwt.exit(),
-                    Key::Character(c) if c == "n" || c == "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);
-                    }
-                }
-                _ => (),
-            }
-        }
-    })
-}

examples/pump_events.rs

@@ -0,0 +1,84 @@
+#![allow(clippy::single_match)]
+
+// Limit this example to only compatible platforms.
+#[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 winit::application::ApplicationHandler;
+    use winit::event::WindowEvent;
+    use winit::event_loop::{ActiveEventLoop, EventLoop};
+    use winit::platform::pump_events::{EventLoopExtPumpEvents, PumpStatus};
+    use winit::window::{Window, WindowId};
+
+    #[path = "util/fill.rs"]
+    mod fill;
+
+    #[derive(Default)]
+    struct PumpDemo {
+        window: Option<Window>,
+    }
+
+    impl ApplicationHandler for PumpDemo {
+        fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+            let window_attributes = Window::default_attributes().with_title("A fantastic window!");
+            self.window = Some(event_loop.create_window(window_attributes).unwrap());
+        }
+
+        fn window_event(
+            &mut self,
+            event_loop: &ActiveEventLoop,
+            _window_id: WindowId,
+            event: WindowEvent,
+        ) {
+            println!("{event:?}");
+
+            let window = match self.window.as_ref() {
+                Some(window) => window,
+                None => return,
+            };
+
+            match event {
+                WindowEvent::CloseRequested => event_loop.exit(),
+                WindowEvent::RedrawRequested => {
+                    fill::fill_window(window);
+                    window.request_redraw();
+                }
+                _ => (),
+            }
+        }
+    }
+
+    let mut event_loop = EventLoop::new().unwrap();
+
+    tracing_subscriber::fmt::init();
+
+    let mut app = PumpDemo::default();
+
+    loop {
+        let timeout = Some(Duration::ZERO);
+        let status = event_loop.pump_app_events(timeout, &mut app);
+
+        if let PumpStatus::Exit(exit_code) = status {
+            break 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));
+    }
+}
+
+#[cfg(any(ios_platform, web_platform, orbital_platform))]
+fn main() {
+    println!("This platform doesn't support pump_events.");
+}

examples/request_redraw.rs

@@ -1,42 +0,0 @@
-#![allow(clippy::single_match)]
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{ElementState, Event, WindowEvent},
-    event_loop::EventLoop,
-    window::WindowBuilder,
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("A fantastic window!")
-        .build(&event_loop)
-        .unwrap();
-
-    event_loop.run(move |event, elwt| {
-        println!("{event:?}");
-
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
-                WindowEvent::MouseInput {
-                    state: ElementState::Released,
-                    ..
-                } => {
-                    window.request_redraw();
-                }
-                WindowEvent::RedrawRequested => {
-                    println!("\nredrawing!\n");
-                    fill::fill_window(&window);
-                }
-                _ => (),
-            }
-        }
-    })
-}

examples/request_redraw_threaded.rs

@@ -1,59 +0,0 @@
-#![allow(clippy::single_match)]
-
-#[cfg(not(wasm_platform))]
-fn main() -> Result<(), impl std::error::Error> {
-    use std::{sync::Arc, thread, time};
-
-    use simple_logger::SimpleLogger;
-    use winit::{
-        event::{Event, WindowEvent},
-        event_loop::EventLoop,
-        window::WindowBuilder,
-    };
-
-    #[path = "util/fill.rs"]
-    mod fill;
-
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = {
-        let window = WindowBuilder::new()
-            .with_title("A fantastic window!")
-            .build(&event_loop)
-            .unwrap();
-        Arc::new(window)
-    };
-
-    thread::spawn({
-        let window = window.clone();
-        move || loop {
-            thread::sleep(time::Duration::from_secs(1));
-            window.request_redraw();
-        }
-    });
-
-    event_loop.run(move |event, elwt| {
-        println!("{event:?}");
-
-        match event {
-            Event::WindowEvent {
-                event: WindowEvent::CloseRequested,
-                ..
-            } => elwt.exit(),
-            Event::WindowEvent {
-                event: WindowEvent::RedrawRequested,
-                ..
-            } => {
-                println!("\nredrawing!\n");
-                fill::fill_window(&window);
-            }
-            _ => (),
-        }
-    })
-}
-
-#[cfg(wasm_platform)]
-fn main() {
-    unimplemented!() // `Window` can't be sent between threads
-}

examples/resizable.rs

@@ -1,54 +0,0 @@
-#![allow(clippy::single_match)]
-
-use simple_logger::SimpleLogger;
-use winit::{
-    dpi::LogicalSize,
-    event::{ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::{KeyCode, PhysicalKey},
-    window::WindowBuilder,
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let mut resizable = false;
-
-    let window = WindowBuilder::new()
-        .with_title("Hit space to toggle resizability.")
-        .with_inner_size(LogicalSize::new(600.0, 300.0))
-        .with_min_inner_size(LogicalSize::new(400.0, 200.0))
-        .with_max_inner_size(LogicalSize::new(800.0, 400.0))
-        .with_resizable(resizable)
-        .build(&event_loop)
-        .unwrap();
-
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
-                WindowEvent::KeyboardInput {
-                    event:
-                        KeyEvent {
-                            physical_key: PhysicalKey::Code(KeyCode::Space),
-                            state: ElementState::Released,
-                            ..
-                        },
-                    ..
-                } => {
-                    resizable = !resizable;
-                    println!("Resizable: {resizable}");
-                    window.set_resizable(resizable);
-                }
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
-                _ => (),
-            }
-        };
-    })
-}

examples/run_on_demand.rs

@@ -0,0 +1,98 @@
+#![allow(clippy::single_match)]
+
+// Limit this example to only compatible platforms.
+#[cfg(any(windows_platform, macos_platform, x11_platform, wayland_platform,))]
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    use std::time::Duration;
+
+    use winit::application::ApplicationHandler;
+    use winit::event::WindowEvent;
+    use winit::event_loop::{ActiveEventLoop, EventLoop};
+    use winit::platform::run_on_demand::EventLoopExtRunOnDemand;
+    use winit::window::{Window, WindowId};
+
+    #[path = "util/fill.rs"]
+    mod fill;
+
+    #[derive(Default)]
+    struct App {
+        idx: usize,
+        window_id: Option<WindowId>,
+        window: Option<Window>,
+    }
+
+    impl ApplicationHandler for App {
+        fn about_to_wait(&mut self, _event_loop: &ActiveEventLoop) {
+            if let Some(window) = self.window.as_ref() {
+                window.request_redraw();
+            }
+        }
+
+        fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+            let window_attributes = Window::default_attributes()
+                .with_title("Fantastic window number one!")
+                .with_inner_size(winit::dpi::LogicalSize::new(128.0, 128.0));
+            let window = event_loop.create_window(window_attributes).unwrap();
+            self.window_id = Some(window.id());
+            self.window = Some(window);
+        }
+
+        fn window_event(
+            &mut self,
+            event_loop: &ActiveEventLoop,
+            window_id: WindowId,
+            event: WindowEvent,
+        ) {
+            if event == WindowEvent::Destroyed && self.window_id == Some(window_id) {
+                println!(
+                    "--------------------------------------------------------- Window {} Destroyed",
+                    self.idx
+                );
+                self.window_id = None;
+                event_loop.exit();
+                return;
+            }
+
+            let window = match self.window.as_mut() {
+                Some(window) => window,
+                None => return,
+            };
+
+            match event {
+                WindowEvent::CloseRequested => {
+                    println!("--------------------------------------------------------- Window {} CloseRequested", self.idx);
+                    fill::cleanup_window(window);
+                    self.window = None;
+                }
+                WindowEvent::RedrawRequested => {
+                    fill::fill_window(window);
+                }
+                _ => (),
+            }
+        }
+    }
+
+    tracing_subscriber::fmt::init();
+
+    let mut event_loop = EventLoop::new().unwrap();
+
+    let mut app = App {
+        idx: 1,
+        ..Default::default()
+    };
+    event_loop.run_app_on_demand(&mut app)?;
+
+    println!("--------------------------------------------------------- Finished first loop");
+    println!("--------------------------------------------------------- Waiting 5 seconds");
+    std::thread::sleep(Duration::from_secs(5));
+
+    app.idx += 1;
+    event_loop.run_app_on_demand(&mut app)?;
+    println!("--------------------------------------------------------- Finished second loop");
+    Ok(())
+}
+
+#[cfg(not(any(windows_platform, macos_platform, x11_platform, wayland_platform,)))]
+fn main() {
+    println!("This example is not supported on this platform");
+}

examples/startup_notification.rs

@@ -1,116 +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::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 == "n" {
-                            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

@@ -1,68 +0,0 @@
-#![allow(clippy::single_match)]
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::Key,
-    window::{Theme, WindowBuilder},
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("A fantastic window!")
-        .with_theme(Some(Theme::Dark))
-        .build(&event_loop)
-        .unwrap();
-
-    println!("Initial theme: {:?}", window.theme());
-    println!("debugging keys:");
-    println!("  (A) Automatic theme");
-    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:?}")
-                }
-                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);
-                }
-                _ => (),
-            }
-        }
-    })
-}

examples/timer.rs

@@ -1,54 +0,0 @@
-#![allow(clippy::single_match)]
-
-use std::time::Duration;
-#[cfg(not(wasm_platform))]
-use std::time::Instant;
-#[cfg(wasm_platform)]
-use web_time::Instant;
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{Event, StartCause, WindowEvent},
-    event_loop::{ControlFlow, EventLoop},
-    window::WindowBuilder,
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("A fantastic window!")
-        .build(&event_loop)
-        .unwrap();
-
-    let timer_length = Duration::new(1, 0);
-
-    event_loop.run(move |event, elwt| {
-        println!("{event:?}");
-
-        match event {
-            Event::NewEvents(StartCause::Init) => {
-                elwt.set_control_flow(ControlFlow::WaitUntil(Instant::now() + timer_length));
-            }
-            Event::NewEvents(StartCause::ResumeTimeReached { .. }) => {
-                elwt.set_control_flow(ControlFlow::WaitUntil(Instant::now() + timer_length));
-                println!("\nTimer\n");
-            }
-            Event::WindowEvent {
-                event: WindowEvent::CloseRequested,
-                ..
-            } => elwt.exit(),
-            Event::WindowEvent {
-                event: WindowEvent::RedrawRequested,
-                ..
-            } => {
-                fill::fill_window(&window);
-            }
-            _ => (),
-        }
-    })
-}

examples/touchpad_gestures.rs

@@ -1,50 +0,0 @@
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{Event, WindowEvent},
-    event_loop::EventLoop,
-    window::WindowBuilder,
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("Touchpad gestures")
-        .build(&event_loop)
-        .unwrap();
-
-    println!("Only supported on macOS at the moment.");
-
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
-                WindowEvent::TouchpadMagnify { delta, .. } => {
-                    if delta > 0.0 {
-                        println!("Zoomed in {delta}");
-                    } else {
-                        println!("Zoomed out {delta}");
-                    }
-                }
-                WindowEvent::SmartMagnify { .. } => {
-                    println!("Smart zoom");
-                }
-                WindowEvent::TouchpadRotate { delta, .. } => {
-                    if delta > 0.0 {
-                        println!("Rotated counterclockwise {delta}");
-                    } else {
-                        println!("Rotated clockwise {delta}");
-                    }
-                }
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
-                _ => (),
-            }
-        }
-    })
-}

examples/transparent.rs

@@ -1,38 +0,0 @@
-#![allow(clippy::single_match)]
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{Event, WindowEvent},
-    event_loop::EventLoop,
-    window::WindowBuilder,
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_decorations(false)
-        .with_transparent(true)
-        .build(&event_loop)
-        .unwrap();
-
-    window.set_title("A fantastic window!");
-
-    event_loop.run(move |event, elwt| {
-        println!("{event:?}");
-
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
-                WindowEvent::RedrawRequested => {
-                    fill::fill_window(&window);
-                }
-                _ => (),
-            }
-        }
-    })
-}

examples/video_modes.rs

@@ -1,22 +0,0 @@
-#![allow(clippy::single_match)]
-
-use simple_logger::SimpleLogger;
-use winit::event_loop::EventLoop;
-
-fn main() {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-    let monitor = match event_loop.primary_monitor() {
-        Some(monitor) => monitor,
-        None => {
-            println!("No primary monitor detected.");
-            return;
-        }
-    };
-
-    println!("Listing available video modes:");
-
-    for mode in monitor.video_modes() {
-        println!("{mode}");
-    }
-}

examples/web.rs

@@ -1,147 +0,0 @@
-#![allow(clippy::disallowed_methods, clippy::single_match)]
-
-use winit::{
-    event::{ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::Key,
-    window::{Fullscreen, WindowBuilder},
-};
-
-pub fn main() -> Result<(), impl std::error::Error> {
-    let event_loop = EventLoop::new().unwrap();
-
-    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();
-
-    #[cfg(wasm_platform)]
-    let log_list = wasm::insert_canvas_and_create_log_list(&window);
-
-    event_loop.run(move |event, elwt| {
-        #[cfg(wasm_platform)]
-        wasm::log_event(&log_list, &event);
-
-        match event {
-            Event::WindowEvent {
-                event: WindowEvent::CloseRequested,
-                window_id,
-            } if window_id == window.id() => elwt.exit(),
-            Event::AboutToWait => {
-                window.request_redraw();
-            }
-            Event::WindowEvent {
-                window_id,
-                event:
-                    WindowEvent::KeyboardInput {
-                        event:
-                            KeyEvent {
-                                logical_key: Key::Character(c),
-                                state: ElementState::Released,
-                                ..
-                            },
-                        ..
-                    },
-            } if window_id == window.id() && c == "f" => {
-                if window.fullscreen().is_some() {
-                    window.set_fullscreen(None);
-                } else {
-                    window.set_fullscreen(Some(Fullscreen::Borderless(None)));
-                }
-            }
-            _ => (),
-        }
-    })
-}
-
-#[cfg(wasm_platform)]
-mod wasm {
-    use std::num::NonZeroU32;
-
-    use softbuffer::{Surface, SurfaceExtWeb};
-    use wasm_bindgen::prelude::*;
-    use winit::{
-        event::{Event, WindowEvent},
-        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();
-    }
-
-    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();
-
-        let log_header = document.create_element("h2").unwrap();
-        log_header.set_text_content(Some("Event Log"));
-        body.append_child(&log_header).unwrap();
-
-        let log_list = document.create_element("ul").unwrap();
-        body.append_child(&log_list).unwrap();
-        log_list
-    }
-
-    pub fn log_event(log_list: &web_sys::Element, event: &Event<()>) {
-        log::debug!("{:?}", event);
-
-        // 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 {
-            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_list
-                .insert_before(&log, log_list.first_child().as_ref())
-                .unwrap();
-        }
-    }
-}

examples/web_aspect_ratio.rs

@@ -1,101 +0,0 @@
-#![allow(clippy::disallowed_methods)]
-
-pub fn main() {
-    println!("This example must be run with cargo run-wasm --example web_aspect_ratio")
-}
-
-#[cfg(wasm_platform)]
-mod wasm {
-    use wasm_bindgen::prelude::*;
-    use web_sys::HtmlCanvasElement;
-    use winit::{
-        dpi::PhysicalSize,
-        event::{Event, WindowEvent},
-        event_loop::EventLoop,
-        platform::web::WindowBuilderExtWebSys,
-        window::{Window, WindowBuilder},
-    };
-
-    const EXPLANATION: &str = "
-This example draws a circle in the middle of a 4/1 aspect ratio canvas which acts as a useful demonstration of winit's resize handling on web.
-Even when the browser window is resized or aspect-ratio of the canvas changed the circle should always:
-* Fill the entire width or height of the canvas (whichever is smaller) without exceeding it.
-* Be perfectly round
-* Not be blurry or pixelated (there is no antialiasing so you may still see jagged edges depending on the DPI of your monitor)
-
-Currently winit does not handle resizes on web so the circle is rendered incorrectly.
-This example demonstrates the desired future functionality which will possibly be provided by https://github.com/rust-windowing/winit/pull/2074
-";
-
-    #[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 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();
-
-        let canvas = create_canvas(&window);
-
-        // 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);
-            }
-            _ => (),
-        });
-    }
-
-    pub fn create_canvas(window: &Window) -> HtmlCanvasElement {
-        use winit::platform::web::WindowExtWebSys;
-
-        let web_window = web_sys::window().unwrap();
-        let document = web_window.document().unwrap();
-        let body = document.body().unwrap();
-
-        // Set a background color for the canvas to make it easier to tell the where the canvas is for debugging purposes.
-        let canvas = window.canvas().unwrap();
-        canvas
-            .style()
-            .set_css_text("display: block; background-color: crimson; margin: auto; width: 50%; aspect-ratio: 4 / 1;");
-
-        let explanation = document.create_element("pre").unwrap();
-        explanation.set_text_content(Some(EXPLANATION));
-        body.append_child(&explanation).unwrap();
-
-        canvas
-    }
-
-    pub fn render_circle(canvas: &HtmlCanvasElement, size: PhysicalSize<u32>) {
-        log::info!("rendering circle with canvas size: {:?}", size);
-        let context = canvas
-            .get_context("2d")
-            .unwrap()
-            .unwrap()
-            .dyn_into::<web_sys::CanvasRenderingContext2d>()
-            .unwrap();
-
-        context.begin_path();
-        context
-            .arc(
-                size.width as f64 / 2.0,
-                size.height as f64 / 2.0,
-                size.width.min(size.height) as f64 / 2.0,
-                0.0,
-                std::f64::consts::PI * 2.0,
-            )
-            .unwrap();
-        context.fill();
-    }
-}

examples/window_buttons.rs

@@ -1,68 +0,0 @@
-#![allow(clippy::single_match)]
-
-// This example is used by developers to test various window functions.
-
-use simple_logger::SimpleLogger;
-use winit::{
-    dpi::LogicalSize,
-    event::{ElementState, Event, KeyEvent, WindowEvent},
-    event_loop::{DeviceEvents, EventLoop},
-    keyboard::Key,
-    window::{WindowBuilder, WindowButtons},
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("A fantastic window!")
-        .with_inner_size(LogicalSize::new(300.0, 300.0))
-        .build(&event_loop)
-        .unwrap();
-
-    eprintln!("Window Button keys:");
-    eprintln!("  (F) Toggle close button");
-    eprintln!("  (G) Toggle maximize button");
-    eprintln!("  (H) Toggle minimize button");
-
-    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);
-                }
-                _ => (),
-            }
-        }
-    })
-}

examples/window_debug.rs

@@ -1,137 +0,0 @@
-#![allow(clippy::single_match)]
-
-// This example is used by developers to test various window functions.
-
-use simple_logger::SimpleLogger;
-use winit::{
-    dpi::{LogicalSize, PhysicalSize},
-    event::{DeviceEvent, ElementState, Event, KeyEvent, RawKeyEvent, WindowEvent},
-    event_loop::{DeviceEvents, EventLoop},
-    keyboard::{Key, KeyCode, PhysicalKey},
-    window::{Fullscreen, WindowBuilder},
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("A fantastic window!")
-        .with_inner_size(LogicalSize::new(100.0, 100.0))
-        .build(&event_loop)
-        .unwrap();
-
-    eprintln!("debugging keys:");
-    eprintln!("  (E) Enter exclusive fullscreen");
-    eprintln!("  (F) Toggle borderless fullscreen");
-    eprintln!("  (P) Toggle borderless fullscreen on system's preffered monitor");
-    eprintln!("  (M) Toggle minimized");
-    eprintln!("  (Q) Quit event loop");
-    eprintln!("  (V) Toggle visibility");
-    eprintln!("  (X) Toggle maximized");
-
-    let mut minimized = false;
-    let mut visible = true;
-
-    event_loop.listen_device_events(DeviceEvents::Always);
-
-    event_loop.run(move |event, elwt| {
-        match event {
-            // This used to use the virtual key, but the new API
-            // only provides the `physical_key` (`Code`).
-            Event::DeviceEvent {
-                event:
-                    DeviceEvent::Key(RawKeyEvent {
-                        physical_key,
-                        state: ElementState::Released,
-                        ..
-                    }),
-                ..
-            } => match physical_key {
-                PhysicalKey::Code(KeyCode::KeyM) => {
-                    if minimized {
-                        minimized = !minimized;
-                        window.set_minimized(minimized);
-                        window.focus_window();
-                    }
-                }
-                PhysicalKey::Code(KeyCode::KeyV) => {
-                    if !visible {
-                        visible = !visible;
-                        window.set_visible(visible);
-                    }
-                }
-                _ => (),
-            },
-            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
-                        }
-
-                        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)));
-                        }
-                    }
-                    "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);
-                }
-                _ => (),
-            },
-            _ => (),
-        }
-    })
-}

examples/window_drag_resize.rs

@@ -1,149 +0,0 @@
-//! Demonstrates capability to create in-app draggable regions for client-side decoration support.
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{ElementState, Event, KeyEvent, MouseButton, StartCause, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::Key,
-    window::{CursorIcon, ResizeDirection, WindowBuilder},
-};
-
-const BORDER: f64 = 8.0;
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_inner_size(winit::dpi::LogicalSize::new(600.0, 400.0))
-        .with_min_inner_size(winit::dpi::LogicalSize::new(400.0, 200.0))
-        .with_decorations(false)
-        .build(&event_loop)
-        .unwrap();
-
-    let mut border = false;
-    let mut cursor_location = None;
-
-    event_loop.run(move |event, elwt| match event {
-        Event::NewEvents(StartCause::Init) => {
-            eprintln!("Press 'B' to toggle borderless")
-        }
-        Event::WindowEvent { event, .. } => match event {
-            WindowEvent::CloseRequested => elwt.exit(),
-            WindowEvent::CursorMoved { position, .. } => {
-                if !window.is_decorated() {
-                    let new_location =
-                        cursor_resize_direction(window.inner_size(), position, BORDER);
-
-                    if new_location != cursor_location {
-                        cursor_location = new_location;
-                        window.set_cursor_icon(cursor_direction_icon(cursor_location))
-                    }
-                }
-            }
-
-            WindowEvent::MouseInput {
-                state: ElementState::Pressed,
-                button: MouseButton::Left,
-                ..
-            } => {
-                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 {
-                event:
-                    KeyEvent {
-                        state: ElementState::Released,
-                        logical_key: Key::Character(c),
-                        ..
-                    },
-                ..
-            } if matches!(c.as_ref(), "B" | "b") => {
-                border = !border;
-                window.set_decorations(border);
-            }
-            WindowEvent::RedrawRequested => {
-                fill::fill_window(&window);
-            }
-            _ => (),
-        },
-
-        _ => (),
-    })
-}
-
-fn cursor_direction_icon(resize_direction: Option<ResizeDirection>) -> CursorIcon {
-    match resize_direction {
-        Some(resize_direction) => match resize_direction {
-            ResizeDirection::East => CursorIcon::EResize,
-            ResizeDirection::North => CursorIcon::NResize,
-            ResizeDirection::NorthEast => CursorIcon::NeResize,
-            ResizeDirection::NorthWest => CursorIcon::NwResize,
-            ResizeDirection::South => CursorIcon::SResize,
-            ResizeDirection::SouthEast => CursorIcon::SeResize,
-            ResizeDirection::SouthWest => CursorIcon::SwResize,
-            ResizeDirection::West => CursorIcon::WResize,
-        },
-        None => CursorIcon::Default,
-    }
-}
-
-fn cursor_resize_direction(
-    win_size: winit::dpi::PhysicalSize<u32>,
-    position: winit::dpi::PhysicalPosition<f64>,
-    border_size: f64,
-) -> Option<ResizeDirection> {
-    enum XDirection {
-        West,
-        East,
-        Default,
-    }
-
-    enum YDirection {
-        North,
-        South,
-        Default,
-    }
-
-    let xdir = if position.x < border_size {
-        XDirection::West
-    } else if position.x > (win_size.width as f64 - border_size) {
-        XDirection::East
-    } else {
-        XDirection::Default
-    };
-
-    let ydir = if position.y < border_size {
-        YDirection::North
-    } else if position.y > (win_size.height as f64 - border_size) {
-        YDirection::South
-    } else {
-        YDirection::Default
-    };
-
-    Some(match xdir {
-        XDirection::West => match ydir {
-            YDirection::North => ResizeDirection::NorthWest,
-            YDirection::South => ResizeDirection::SouthWest,
-            YDirection::Default => ResizeDirection::West,
-        },
-
-        XDirection::East => match ydir {
-            YDirection::North => ResizeDirection::NorthEast,
-            YDirection::South => ResizeDirection::SouthEast,
-            YDirection::Default => ResizeDirection::East,
-        },
-
-        XDirection::Default => match ydir {
-            YDirection::North => ResizeDirection::North,
-            YDirection::South => ResizeDirection::South,
-            YDirection::Default => return None,
-        },
-    })
-}

examples/window_icon.rs

@@ -1,60 +0,0 @@
-#![allow(clippy::single_match)]
-
-use std::path::Path;
-
-use simple_logger::SimpleLogger;
-use winit::{
-    event::{Event, WindowEvent},
-    event_loop::EventLoop,
-    window::{Icon, WindowBuilder},
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-
-    // You'll have to choose an icon size at your own discretion. On X11, the desired size varies
-    // by WM, and on Windows, you still have to account for screen scaling. Here we use 32px,
-    // since it seems to work well enough in most cases. Be careful about going too high, or
-    // you'll be bitten by the low-quality downscaling built into the WM.
-    let path = concat!(env!("CARGO_MANIFEST_DIR"), "/examples/icon.png");
-
-    let icon = load_icon(Path::new(path));
-
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("An iconic window!")
-        // At present, this only does anything on Windows and X11, so if you want to save load
-        // time, you can put icon loading behind a function that returns `None` on other platforms.
-        .with_window_icon(Some(icon))
-        .build(&event_loop)
-        .unwrap();
-
-    event_loop.run(move |event, elwt| {
-        if let Event::WindowEvent { event, .. } = event {
-            match event {
-                WindowEvent::CloseRequested => elwt.exit(),
-                WindowEvent::DroppedFile(path) => {
-                    window.set_window_icon(Some(load_icon(&path)));
-                }
-                WindowEvent::RedrawRequested => fill::fill_window(&window),
-                _ => (),
-            }
-        }
-    })
-}
-
-fn load_icon(path: &Path) -> Icon {
-    let (icon_rgba, icon_width, icon_height) = {
-        let image = image::open(path)
-            .expect("Failed to open icon path")
-            .into_rgba8();
-        let (width, height) = image.dimensions();
-        let rgba = image.into_raw();
-        (rgba, width, height)
-    };
-    Icon::from_rgba(icon_rgba, icon_width, icon_height).expect("Failed to open icon")
-}

examples/window_on_demand.rs

@@ -1,93 +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");
-                        fill::cleanup_window(window);
-                        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

@@ -1,72 +0,0 @@
-#![allow(clippy::single_match)]
-
-#[cfg(target_os = "macos")]
-use winit::platform::macos::{OptionAsAlt, WindowExtMacOS};
-
-#[cfg(target_os = "macos")]
-use winit::{
-    event::ElementState,
-    event::{Event, MouseButton, WindowEvent},
-    event_loop::EventLoop,
-    window::WindowBuilder,
-};
-
-#[cfg(target_os = "macos")]
-#[path = "util/fill.rs"]
-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();
-
-    let window = WindowBuilder::new()
-        .with_title("A fantastic window!")
-        .with_inner_size(winit::dpi::LogicalSize::new(128.0, 128.0))
-        .build(&event_loop)
-        .unwrap();
-
-    window.set_ime_allowed(true);
-
-    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,
-                };
-
-                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:?}"),
-            WindowEvent::RedrawRequested => {
-                fill::fill_window(&window);
-            }
-            _ => (),
-        },
-        Event::AboutToWait => {
-            window.request_redraw();
-        }
-
-        _ => (),
-    })
-}
-
-#[cfg(not(target_os = "macos"))]
-fn main() {
-    println!("This example is only supported on MacOS");
-}

examples/window_pump_events.rs

@@ -1,74 +0,0 @@
-#![allow(clippy::single_match)]
-
-// Limit this example to only compatible platforms.
-#[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,
-    };
-
-    #[path = "util/fill.rs"]
-    mod fill;
-
-    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();
-                }
-                Event::WindowEvent {
-                    event: WindowEvent::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(Duration::from_millis(16));
-    }
-}
-
-#[cfg(any(ios_platform, wasm_platform, orbital_platform))]
-fn main() {
-    println!("This platform doesn't support pump_events.");
-}

examples/window_resize_increments.rs

@@ -1,52 +0,0 @@
-use log::debug;
-use simple_logger::SimpleLogger;
-use winit::{
-    dpi::LogicalSize,
-    event::{ElementState, Event, WindowEvent},
-    event_loop::EventLoop,
-    keyboard::NamedKey,
-    window::WindowBuilder,
-};
-
-#[path = "util/fill.rs"]
-mod fill;
-
-fn main() -> Result<(), impl std::error::Error> {
-    SimpleLogger::new().init().unwrap();
-    let event_loop = EventLoop::new().unwrap();
-
-    let window = WindowBuilder::new()
-        .with_title("A fantastic window!")
-        .with_inner_size(LogicalSize::new(128.0, 128.0))
-        .with_resize_increments(LogicalSize::new(25.0, 25.0))
-        .build(&event_loop)
-        .unwrap();
-
-    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, .. }
-                if event.logical_key == NamedKey::Space
-                    && event.state == ElementState::Released =>
-            {
-                has_increments = !has_increments;
-
-                let new_increments = match window.resize_increments() {
-                    Some(_) => None,
-                    None => Some(LogicalSize::new(25.0, 25.0)),
-                };
-                debug!("Had increments: {}", new_increments.is_none());
-                window.set_resize_increments(new_increments);
-            }
-            WindowEvent::RedrawRequested => {
-                fill::fill_window(&window);
-            }
-            _ => (),
-        },
-        Event::AboutToWait => window.request_redraw(),
-
-        _ => (),
-    })
-}

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, NamedKey},
-    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::Named(NamedKey::ArrowRight) => {
-                        windows.get(&window_id).unwrap().select_next_tab();
-                    }
-                    Key::Named(NamedKey::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 +1,72 @@
 //! A demonstration of embedding a winit window in an existing X11 application.
+use std::error::Error;
 
 #[cfg(x11_platform)]
-#[path = "util/fill.rs"]
-mod fill;
+fn main() -> Result<(), Box<dyn Error>> {
+    use winit::application::ApplicationHandler;
+    use winit::event::WindowEvent;
+    use winit::event_loop::{ActiveEventLoop, EventLoop};
+    use winit::platform::x11::WindowAttributesExtX11;
+    use winit::window::{Window, WindowId};
 
-#[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,
-    };
+    #[path = "util/fill.rs"]
+    mod fill;
 
-    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>()?;
+    pub struct XEmbedDemo {
+        parent_window_id: u32,
+        window: Option<Window>,
+    }
 
-        SimpleLogger::new().init().unwrap();
-        let event_loop = EventLoop::new()?;
+    impl ApplicationHandler for XEmbedDemo {
+        fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+            let window_attributes = Window::default_attributes()
+                .with_title("An embedded window!")
+                .with_inner_size(winit::dpi::LogicalSize::new(128.0, 128.0))
+                .with_embed_parent_window(self.parent_window_id);
 
-        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();
+            self.window = Some(event_loop.create_window(window_attributes).unwrap());
+        }
 
-        event_loop.run(move |event, elwt| {
+        fn window_event(
+            &mut self,
+            event_loop: &ActiveEventLoop,
+            _window_id: WindowId,
+            event: WindowEvent,
+        ) {
+            let window = self.window.as_ref().unwrap();
             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.
+                WindowEvent::CloseRequested => event_loop.exit(),
+                WindowEvent::RedrawRequested => {
                     window.pre_present_notify();
-                    fill::fill_window(&window);
+                    fill::fill_window(window);
                 }
                 _ => (),
             }
-        })?;
+        }
 
-        Ok(())
+        fn about_to_wait(&mut self, _event_loop: &ActiveEventLoop) {
+            self.window.as_ref().unwrap().request_redraw();
+        }
     }
+
+    // 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>()?;
+
+    tracing_subscriber::fmt::init();
+    let event_loop = EventLoop::new()?;
+
+    let mut app = XEmbedDemo {
+        parent_window_id,
+        window: None,
+    };
+    event_loop.run_app(&mut app).map_err(Into::into)
 }
 
 #[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()
+fn main() -> Result<(), Box<dyn Error>> {
+    println!("This example is only supported on X11 platforms.");
+    Ok(())
 }

run-wasm/Cargo.toml

@@ -1,9 +1,11 @@
 [package]
 name = "run-wasm"
 version = "0.1.0"
-edition = "2021"
-
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+rust-version.workspace = true
+repository.workspace = true
+license.workspace = true
+edition.workspace = true
+publish = false
 
 [dependencies]
 cargo-run-wasm = "0.2.0"

src/application.rs

@@ -0,0 +1,221 @@
+//! End user application handling.
+
+use crate::event::{DeviceEvent, DeviceId, StartCause, WindowEvent};
+use crate::event_loop::ActiveEventLoop;
+use crate::window::WindowId;
+
+/// The handler of the application events.
+pub trait ApplicationHandler<T: 'static = ()> {
+    /// Emitted when new events arrive from the OS to be processed.
+    ///
+    /// This is a useful 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
+    /// [`ControlFlow::WaitUntil`](crate::event_loop::ControlFlow::WaitUntil) has elapsed.
+    fn new_events(&mut self, event_loop: &ActiveEventLoop, cause: StartCause) {
+        let _ = (event_loop, cause);
+    }
+
+    /// Emitted when the application has been resumed.
+    ///
+    /// For consistency, all platforms emit a `Resumed` event even if they don't themselves have a
+    /// formal suspend/resume lifecycle. For systems without a formal suspend/resume lifecycle
+    /// the `Resumed` event is always emitted after the [`NewEvents(StartCause::Init)`][StartCause::Init]
+    /// event.
+    ///
+    /// # Portability
+    ///
+    /// It's recommended that applications should only initialize their graphics context and create
+    /// a window after they have received their first `Resumed` event. Some systems
+    /// (specifically Android) won't allow applications to create a render surface until they are
+    /// resumed.
+    ///
+    /// Considering that the implementation of [`Suspended`] and `Resumed` events may be internally
+    /// driven by multiple platform-specific events, and that there may be subtle differences across
+    /// platforms with how these internal events are delivered, it's recommended that applications
+    /// be able to gracefully handle redundant (i.e. back-to-back) [`Suspended`] or `Resumed` events.
+    ///
+    /// Also see [`Suspended`] notes.
+    ///
+    /// ## Android
+    ///
+    /// On Android, the `Resumed` event is sent when a new [`SurfaceView`] has been created. This is
+    /// expected to closely correlate with the [`onResume`] lifecycle event but there may technically
+    /// be a discrepancy.
+    ///
+    /// [`onResume`]: https://developer.android.com/reference/android/app/Activity#onResume()
+    ///
+    /// Applications that need to run on Android must wait until they have been `Resumed`
+    /// before they will be able to create a render surface (such as an `EGLSurface`,
+    /// [`VkSurfaceKHR`] or [`wgpu::Surface`]) which depend on having a
+    /// [`SurfaceView`]. Applications must also assume that if they are [`Suspended`], then their
+    /// render surfaces are invalid and should be dropped.
+    ///
+    /// Also see [`Suspended`] notes.
+    ///
+    /// [`SurfaceView`]: https://developer.android.com/reference/android/view/SurfaceView
+    /// [Activity lifecycle]: https://developer.android.com/guide/components/activities/activity-lifecycle
+    /// [`VkSurfaceKHR`]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VkSurfaceKHR.html
+    /// [`wgpu::Surface`]: https://docs.rs/wgpu/latest/wgpu/struct.Surface.html
+    ///
+    /// ## iOS
+    ///
+    /// On iOS, the `Resumed` event is emitted in response to an [`applicationDidBecomeActive`]
+    /// callback which means the application is "active" (according to the
+    /// [iOS application lifecycle]).
+    ///
+    /// [`applicationDidBecomeActive`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1622956-applicationdidbecomeactive
+    /// [iOS application lifecycle]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle
+    ///
+    /// ## Web
+    ///
+    /// 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
+    /// stores a complete snapshot of a page (including the JavaScript heap) as the
+    /// user is navigating away.
+    ///
+    /// [`pageshow`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/pageshow_event
+    /// [`persisted`]: https://developer.mozilla.org/en-US/docs/Web/API/PageTransitionEvent/persisted
+    /// [`bfcache`]: https://web.dev/bfcache/
+    /// [`Suspended`]: Self::suspended
+    fn resumed(&mut self, event_loop: &ActiveEventLoop);
+
+    /// Emitted when an event is sent from [`EventLoopProxy::send_event`].
+    ///
+    /// [`EventLoopProxy::send_event`]: crate::event_loop::EventLoopProxy::send_event
+    fn user_event(&mut self, event_loop: &ActiveEventLoop, event: T) {
+        let _ = (event_loop, event);
+    }
+
+    /// Emitted when the OS sends an event to a winit window.
+    fn window_event(
+        &mut self,
+        event_loop: &ActiveEventLoop,
+        window_id: WindowId,
+        event: WindowEvent,
+    );
+
+    /// Emitted when the OS sends an event to a device.
+    fn device_event(
+        &mut self,
+        event_loop: &ActiveEventLoop,
+        device_id: DeviceId,
+        event: DeviceEvent,
+    ) {
+        let _ = (event_loop, device_id, event);
+    }
+
+    /// Emitted when the event loop is about to block and wait for new events.
+    ///
+    /// 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.
+    ///
+    /// High frequency event sources, such as input devices could potentially lead to lots of wake
+    /// ups and also lots of corresponding `AboutToWait` events.
+    ///
+    /// This is not an ideal event to drive application rendering from and instead applications
+    /// should render in response to [`WindowEvent::RedrawRequested`] events.
+    fn about_to_wait(&mut self, event_loop: &ActiveEventLoop) {
+        let _ = event_loop;
+    }
+
+    /// Emitted when the application has been suspended.
+    ///
+    /// # Portability
+    ///
+    /// 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,
+    /// Winit does not currently try to emit pseudo `Suspended` events before the application
+    /// quits on platforms without an application lifecycle.
+    ///
+    /// Considering that the implementation of `Suspended` and [`Resumed`] events may be internally
+    /// driven by multiple platform-specific events, and that there may be subtle differences across
+    /// platforms with how these internal events are delivered, it's recommended that applications
+    /// be able to gracefully handle redundant (i.e. back-to-back) `Suspended` or [`Resumed`] events.
+    ///
+    /// Also see [`Resumed`] notes.
+    ///
+    /// ## Android
+    ///
+    /// On Android, the `Suspended` event is only sent when the application's associated
+    /// [`SurfaceView`] is destroyed. This is expected to closely correlate with the [`onPause`]
+    /// lifecycle event but there may technically be a discrepancy.
+    ///
+    /// [`onPause`]: https://developer.android.com/reference/android/app/Activity#onPause()
+    ///
+    /// Applications that need to run on Android should assume their [`SurfaceView`] has been
+    /// destroyed, which indirectly invalidates any existing render surfaces that may have been
+    /// created outside of Winit (such as an `EGLSurface`, [`VkSurfaceKHR`] or [`wgpu::Surface`]).
+    ///
+    /// After being `Suspended` on Android applications must drop all render surfaces before
+    /// the event callback completes, which may be re-created when the application is next [`Resumed`].
+    ///
+    /// [`SurfaceView`]: https://developer.android.com/reference/android/view/SurfaceView
+    /// [Activity lifecycle]: https://developer.android.com/guide/components/activities/activity-lifecycle
+    /// [`VkSurfaceKHR`]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VkSurfaceKHR.html
+    /// [`wgpu::Surface`]: https://docs.rs/wgpu/latest/wgpu/struct.Surface.html
+    ///
+    /// ## iOS
+    ///
+    /// On iOS, the `Suspended` event is currently emitted in response to an
+    /// [`applicationWillResignActive`] callback which means that the application is
+    /// about to transition from the active to inactive state (according to the
+    /// [iOS application lifecycle]).
+    ///
+    /// [`applicationWillResignActive`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1622950-applicationwillresignactive
+    /// [iOS application lifecycle]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle
+    ///
+    /// ## Web
+    ///
+    /// 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
+    /// complete snapshot of a page (including the JavaScript heap) as the user is
+    /// navigating away.
+    ///
+    /// [`pagehide`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/pagehide_event
+    /// [`persisted`]: https://developer.mozilla.org/en-US/docs/Web/API/PageTransitionEvent/persisted
+    /// [`bfcache`]: https://web.dev/bfcache/
+    /// [`Resumed`]: Self::resumed
+    fn suspended(&mut self, event_loop: &ActiveEventLoop) {
+        let _ = event_loop;
+    }
+
+    /// Emitted when the event loop is being shut down.
+    ///
+    /// This is irreversible - if this method is called, it is guaranteed that the event loop
+    /// will exist right after.
+    fn exiting(&mut self, event_loop: &ActiveEventLoop) {
+        let _ = event_loop;
+    }
+
+    /// 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 / Orbital / Wayland / Web / Windows:** Unsupported.
+    fn memory_warning(&mut self, event_loop: &ActiveEventLoop) {
+        let _ = event_loop;
+    }
+}

src/cursor.rs

@@ -0,0 +1,289 @@
+use core::fmt;
+use std::hash::Hasher;
+use std::sync::Arc;
+use std::{error::Error, hash::Hash};
+
+use cursor_icon::CursorIcon;
+
+use crate::platform_impl::{PlatformCustomCursor, PlatformCustomCursorSource};
+
+/// The maximum width and height for a cursor when using [`CustomCursor::from_rgba`].
+pub const MAX_CURSOR_SIZE: u16 = 2048;
+
+const PIXEL_SIZE: usize = 4;
+
+/// See [`Window::set_cursor()`](crate::window::Window::set_cursor) for more details.
+#[derive(Clone, Debug, Eq, Hash, PartialEq)]
+pub enum Cursor {
+    Icon(CursorIcon),
+    Custom(CustomCursor),
+}
+
+impl Default for Cursor {
+    fn default() -> Self {
+        Self::Icon(CursorIcon::default())
+    }
+}
+
+impl From<CursorIcon> for Cursor {
+    fn from(icon: CursorIcon) -> Self {
+        Self::Icon(icon)
+    }
+}
+
+impl From<CustomCursor> for Cursor {
+    fn from(custom: CustomCursor) -> Self {
+        Self::Custom(custom)
+    }
+}
+
+/// Use a custom image as a cursor (mouse pointer).
+///
+/// Is guaranteed to be cheap to clone.
+///
+/// ## Platform-specific
+///
+/// **Web**: Some browsers have limits on cursor sizes usually at 128x128.
+///
+/// # Example
+///
+/// ```no_run
+/// # use winit::event_loop::ActiveEventLoop;
+/// # use winit::window::Window;
+/// # fn scope(event_loop: &ActiveEventLoop, window: &Window) {
+/// use winit::window::CustomCursor;
+///
+/// let w = 10;
+/// let h = 10;
+/// let rgba = vec![255; (w * h * 4) as usize];
+///
+/// #[cfg(not(target_family = "wasm"))]
+/// let source = CustomCursor::from_rgba(rgba, w, h, w / 2, h / 2).unwrap();
+///
+/// #[cfg(target_family = "wasm")]
+/// let source = {
+///     use winit::platform::web::CustomCursorExtWebSys;
+///     CustomCursor::from_url(String::from("http://localhost:3000/cursor.png"), 0, 0)
+/// };
+///
+/// let custom_cursor = event_loop.create_custom_cursor(source);
+///
+/// window.set_cursor(custom_cursor.clone());
+/// # }
+/// ```
+#[derive(Clone, Debug, Eq, Hash, PartialEq)]
+pub struct CustomCursor {
+    /// Platforms should make sure this is cheap to clone.
+    pub(crate) inner: PlatformCustomCursor,
+}
+
+impl CustomCursor {
+    /// Creates a new cursor from an rgba buffer.
+    ///
+    /// The alpha channel is assumed to be **not** premultiplied.
+    pub fn from_rgba(
+        rgba: impl Into<Vec<u8>>,
+        width: u16,
+        height: u16,
+        hotspot_x: u16,
+        hotspot_y: u16,
+    ) -> Result<CustomCursorSource, BadImage> {
+        let _span = tracing::debug_span!(
+            "winit::Cursor::from_rgba",
+            width,
+            height,
+            hotspot_x,
+            hotspot_y
+        )
+        .entered();
+
+        Ok(CustomCursorSource {
+            inner: PlatformCustomCursorSource::from_rgba(
+                rgba.into(),
+                width,
+                height,
+                hotspot_x,
+                hotspot_y,
+            )?,
+        })
+    }
+}
+
+/// Source for [`CustomCursor`].
+///
+/// See [`CustomCursor`] for more details.
+#[derive(Debug)]
+pub struct CustomCursorSource {
+    pub(crate) inner: PlatformCustomCursorSource,
+}
+
+/// An error produced when using [`CustomCursor::from_rgba`] with invalid arguments.
+#[derive(Debug, Clone)]
+pub enum BadImage {
+    /// Produced when the image dimensions are larger than [`MAX_CURSOR_SIZE`]. This doesn't
+    /// guarantee that the cursor will work, but should avoid many platform and device specific
+    /// limits.
+    TooLarge { width: u16, height: u16 },
+    /// Produced when the length of the `rgba` argument isn't divisible by 4, thus `rgba` can't be
+    /// safely interpreted as 32bpp RGBA pixels.
+    ByteCountNotDivisibleBy4 { byte_count: usize },
+    /// Produced when the number of pixels (`rgba.len() / 4`) isn't equal to `width * height`.
+    /// At least one of your arguments is incorrect.
+    DimensionsVsPixelCount {
+        width: u16,
+        height: u16,
+        width_x_height: u64,
+        pixel_count: u64,
+    },
+    /// Produced when the hotspot is outside the image bounds
+    HotspotOutOfBounds {
+        width: u16,
+        height: u16,
+        hotspot_x: u16,
+        hotspot_y: u16,
+    },
+}
+
+impl fmt::Display for BadImage {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            BadImage::TooLarge { width, height } => write!(f,
+                "The specified dimensions ({width:?}x{height:?}) are too large. The maximum is {MAX_CURSOR_SIZE:?}x{MAX_CURSOR_SIZE:?}.",
+            ),
+            BadImage::ByteCountNotDivisibleBy4 { byte_count } => write!(f,
+                "The length of the `rgba` argument ({byte_count:?}) isn't divisible by 4, making it impossible to interpret as 32bpp RGBA pixels.",
+            ),
+            BadImage::DimensionsVsPixelCount {
+                width,
+                height,
+                width_x_height,
+                pixel_count,
+            } => write!(f,
+                "The specified dimensions ({width:?}x{height:?}) don't match the number of pixels supplied by the `rgba` argument ({pixel_count:?}). For those dimensions, the expected pixel count is {width_x_height:?}.",
+            ),
+            BadImage::HotspotOutOfBounds {
+                width,
+                height,
+                hotspot_x,
+                hotspot_y,
+            } => write!(f,
+                "The specified hotspot ({hotspot_x:?}, {hotspot_y:?}) is outside the image bounds ({width:?}x{height:?}).",
+            ),
+        }
+    }
+}
+
+impl Error for BadImage {}
+
+/// Platforms export this directly as `PlatformCustomCursorSource` if they need to only work with
+/// images.
+#[allow(dead_code)]
+#[derive(Debug)]
+pub(crate) struct OnlyCursorImageSource(pub(crate) CursorImage);
+
+#[allow(dead_code)]
+impl OnlyCursorImageSource {
+    pub(crate) fn from_rgba(
+        rgba: Vec<u8>,
+        width: u16,
+        height: u16,
+        hotspot_x: u16,
+        hotspot_y: u16,
+    ) -> Result<Self, BadImage> {
+        CursorImage::from_rgba(rgba, width, height, hotspot_x, hotspot_y).map(Self)
+    }
+}
+
+/// Platforms export this directly as `PlatformCustomCursor` if they don't implement caching.
+#[derive(Debug, Clone)]
+pub(crate) struct OnlyCursorImage(pub(crate) Arc<CursorImage>);
+
+impl Hash for OnlyCursorImage {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        Arc::as_ptr(&self.0).hash(state);
+    }
+}
+
+impl PartialEq for OnlyCursorImage {
+    fn eq(&self, other: &Self) -> bool {
+        Arc::ptr_eq(&self.0, &other.0)
+    }
+}
+
+impl Eq for OnlyCursorImage {}
+
+#[derive(Debug)]
+#[allow(dead_code)]
+pub(crate) struct CursorImage {
+    pub(crate) rgba: Vec<u8>,
+    pub(crate) width: u16,
+    pub(crate) height: u16,
+    pub(crate) hotspot_x: u16,
+    pub(crate) hotspot_y: u16,
+}
+
+impl CursorImage {
+    pub(crate) fn from_rgba(
+        rgba: Vec<u8>,
+        width: u16,
+        height: u16,
+        hotspot_x: u16,
+        hotspot_y: u16,
+    ) -> Result<Self, BadImage> {
+        if width > MAX_CURSOR_SIZE || height > MAX_CURSOR_SIZE {
+            return Err(BadImage::TooLarge { width, height });
+        }
+
+        if rgba.len() % PIXEL_SIZE != 0 {
+            return Err(BadImage::ByteCountNotDivisibleBy4 {
+                byte_count: rgba.len(),
+            });
+        }
+
+        let pixel_count = (rgba.len() / PIXEL_SIZE) as u64;
+        let width_x_height = width as u64 * height as u64;
+        if pixel_count != width_x_height {
+            return Err(BadImage::DimensionsVsPixelCount {
+                width,
+                height,
+                width_x_height,
+                pixel_count,
+            });
+        }
+
+        if hotspot_x >= width || hotspot_y >= height {
+            return Err(BadImage::HotspotOutOfBounds {
+                width,
+                height,
+                hotspot_x,
+                hotspot_y,
+            });
+        }
+
+        Ok(CursorImage {
+            rgba,
+            width,
+            height,
+            hotspot_x,
+            hotspot_y,
+        })
+    }
+}
+
+// Platforms that don't support cursors will export this as `PlatformCustomCursor`.
+#[derive(Debug, Clone, Hash, PartialEq, Eq)]
+pub(crate) struct NoCustomCursor;
+
+#[allow(dead_code)]
+impl NoCustomCursor {
+    pub(crate) fn from_rgba(
+        rgba: Vec<u8>,
+        width: u16,
+        height: u16,
+        hotspot_x: u16,
+        hotspot_y: u16,
+    ) -> Result<Self, BadImage> {
+        CursorImage::from_rgba(rgba, width, height, hotspot_x, hotspot_y)?;
+        Ok(Self)
+    }
+}

src/error.rs

@@ -35,8 +35,6 @@ pub enum EventLoopError {
     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.
@@ -105,7 +103,6 @@ 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),

src/event.rs

@@ -1,44 +1,47 @@
 //! The [`Event`] enum and assorted supporting types.
 //!
-//! These are sent to the closure given to [`EventLoop::run(...)`], where they get
+//! These are sent to the closure given to [`EventLoop::run_app(...)`], where they get
 //! processed and used to modify the program state. For more details, see the root-level documentation.
 //!
 //! Some of these events represent different "parts" of a traditional event-handling loop. You could
-//! approximate the basic ordering loop of [`EventLoop::run(...)`] like this:
+//! approximate the basic ordering loop of [`EventLoop::run_app(...)`] like this:
 //!
 //! ```rust,ignore
 //! let mut start_cause = StartCause::Init;
 //!
 //! while !elwt.exiting() {
-//!     event_handler(NewEvents(start_cause), elwt);
+//!     app.new_events(event_loop, start_cause);
 //!
-//!     for e in (window events, user events, device events) {
-//!         event_handler(e, elwt);
+//!     for event in (window events, user events, device events) {
+//!         // This will pick the right method on the application based on the event.
+//!         app.handle_event(event_loop, event);
 //!     }
 //!
-//!     for w in (redraw windows) {
-//!         event_handler(RedrawRequested(w), elwt);
+//!     for window_id in (redraw windows) {
+//!         app.window_event(event_loop, window_id, RedrawRequested);
 //!     }
 //!
-//!     event_handler(AboutToWait, elwt);
+//!     app.about_to_wait(event_loop);
 //!     start_cause = wait_if_necessary();
 //! }
 //!
-//! event_handler(LoopExiting, elwt);
+//! app.exiting(event_loop);
 //! ```
 //!
 //! This leaves out timing details like [`ControlFlow::WaitUntil`] but hopefully
 //! describes what happens in what order.
 //!
-//! [`EventLoop::run(...)`]: crate::event_loop::EventLoop::run
+//! [`EventLoop::run_app(...)`]: crate::event_loop::EventLoop::run_app
 //! [`ControlFlow::WaitUntil`]: crate::event_loop::ControlFlow::WaitUntil
 use std::path::PathBuf;
 use std::sync::{Mutex, Weak};
-#[cfg(not(wasm_platform))]
+#[cfg(not(web_platform))]
 use std::time::Instant;
 
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
 use smol_str::SmolStr;
-#[cfg(wasm_platform)]
+#[cfg(web_platform)]
 use web_time::Instant;
 
 use crate::error::ExternalError;
@@ -57,199 +60,55 @@ use crate::{
 /// See the module-level docs for more information on the event loop manages each event.
 #[derive(Debug, Clone, PartialEq)]
 pub enum Event<T: 'static> {
-    /// Emitted when new events arrive from the OS to be processed.
+    /// See [`ApplicationHandler::new_events`] for details.
     ///
-    /// 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
-    /// [`ControlFlow::WaitUntil`](crate::event_loop::ControlFlow::WaitUntil) has elapsed.
+    /// [`ApplicationHandler::new_events`]: crate::application::ApplicationHandler::new_events
     NewEvents(StartCause),
 
-    /// Emitted when the OS sends an event to a winit window.
+    /// See [`ApplicationHandler::window_event`] for details.
+    ///
+    /// [`ApplicationHandler::window_event`]: crate::application::ApplicationHandler::window_event
     WindowEvent {
         window_id: WindowId,
         event: WindowEvent,
     },
 
-    /// Emitted when the OS sends an event to a device.
+    /// See [`ApplicationHandler::device_event`] for details.
+    ///
+    /// [`ApplicationHandler::device_event`]: crate::application::ApplicationHandler::device_event
     DeviceEvent {
         device_id: DeviceId,
         event: DeviceEvent,
     },
 
-    /// Emitted when an event is sent from [`EventLoopProxy::send_event`](crate::event_loop::EventLoopProxy::send_event)
+    /// See [`ApplicationHandler::user_event`] for details.
+    ///
+    /// [`ApplicationHandler::user_event`]: crate::application::ApplicationHandler::user_event
     UserEvent(T),
 
-    /// Emitted when the application has been suspended.
+    /// See [`ApplicationHandler::suspended`] for details.
     ///
-    /// # Portability
-    ///
-    /// 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,
-    /// Winit does not currently try to emit pseudo `Suspended` events before the application
-    /// quits on platforms without an application lifecycle.
-    ///
-    /// Considering that the implementation of `Suspended` and [`Resumed`] events may be internally
-    /// driven by multiple platform-specific events, and that there may be subtle differences across
-    /// platforms with how these internal events are delivered, it's recommended that applications
-    /// be able to gracefully handle redundant (i.e. back-to-back) `Suspended` or [`Resumed`] events.
-    ///
-    /// Also see [`Resumed`] notes.
-    ///
-    /// ## Android
-    ///
-    /// On Android, the `Suspended` event is only sent when the application's associated
-    /// [`SurfaceView`] is destroyed. This is expected to closely correlate with the [`onPause`]
-    /// lifecycle event but there may technically be a discrepancy.
-    ///
-    /// [`onPause`]: https://developer.android.com/reference/android/app/Activity#onPause()
-    ///
-    /// Applications that need to run on Android should assume their [`SurfaceView`] has been
-    /// destroyed, which indirectly invalidates any existing render surfaces that may have been
-    /// created outside of Winit (such as an `EGLSurface`, [`VkSurfaceKHR`] or [`wgpu::Surface`]).
-    ///
-    /// After being `Suspended` on Android applications must drop all render surfaces before
-    /// the event callback completes, which may be re-created when the application is next [`Resumed`].
-    ///
-    /// [`SurfaceView`]: https://developer.android.com/reference/android/view/SurfaceView
-    /// [Activity lifecycle]: https://developer.android.com/guide/components/activities/activity-lifecycle
-    /// [`VkSurfaceKHR`]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VkSurfaceKHR.html
-    /// [`wgpu::Surface`]: https://docs.rs/wgpu/latest/wgpu/struct.Surface.html
-    ///
-    /// ## iOS
-    ///
-    /// On iOS, the `Suspended` event is currently emitted in response to an
-    /// [`applicationWillResignActive`] callback which means that the application is
-    /// about to transition from the active to inactive state (according to the
-    /// [iOS application lifecycle]).
-    ///
-    /// [`applicationWillResignActive`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1622950-applicationwillresignactive
-    /// [iOS application lifecycle]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle
-    ///
-    /// ## Web
-    ///
-    /// 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
-    /// complete snapshot of a page (including the JavaScript heap) as the user is
-    /// navigating away.
-    ///
-    /// [`pagehide`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/pagehide_event
-    /// [`persisted`]: https://developer.mozilla.org/en-US/docs/Web/API/PageTransitionEvent/persisted
-    /// [`bfcache`]: https://web.dev/bfcache/
-    ///
-    /// [`Resumed`]: Self::Resumed
+    /// [`ApplicationHandler::suspended`]: crate::application::ApplicationHandler::suspended
     Suspended,
 
-    /// Emitted when the application has been resumed.
+    /// See [`ApplicationHandler::resumed`] for details.
     ///
-    /// For consistency, all platforms emit a `Resumed` event even if they don't themselves have a
-    /// formal suspend/resume lifecycle. For systems without a standard suspend/resume lifecycle
-    /// the `Resumed` event is always emitted after the [`NewEvents(StartCause::Init)`][StartCause::Init]
-    /// event.
-    ///
-    /// # Portability
-    ///
-    /// It's recommended that applications should only initialize their graphics context and create
-    /// a window after they have received their first `Resumed` event. Some systems
-    /// (specifically Android) won't allow applications to create a render surface until they are
-    /// resumed.
-    ///
-    /// Considering that the implementation of [`Suspended`] and `Resumed` events may be internally
-    /// driven by multiple platform-specific events, and that there may be subtle differences across
-    /// platforms with how these internal events are delivered, it's recommended that applications
-    /// be able to gracefully handle redundant (i.e. back-to-back) [`Suspended`] or `Resumed` events.
-    ///
-    /// Also see [`Suspended`] notes.
-    ///
-    /// ## Android
-    ///
-    /// On Android, the `Resumed` event is sent when a new [`SurfaceView`] has been created. This is
-    /// expected to closely correlate with the [`onResume`] lifecycle event but there may technically
-    /// be a discrepancy.
-    ///
-    /// [`onResume`]: https://developer.android.com/reference/android/app/Activity#onResume()
-    ///
-    /// Applications that need to run on Android must wait until they have been `Resumed`
-    /// before they will be able to create a render surface (such as an `EGLSurface`,
-    /// [`VkSurfaceKHR`] or [`wgpu::Surface`]) which depend on having a
-    /// [`SurfaceView`]. Applications must also assume that if they are [`Suspended`], then their
-    /// render surfaces are invalid and should be dropped.
-    ///
-    /// Also see [`Suspended`] notes.
-    ///
-    /// [`SurfaceView`]: https://developer.android.com/reference/android/view/SurfaceView
-    /// [Activity lifecycle]: https://developer.android.com/guide/components/activities/activity-lifecycle
-    /// [`VkSurfaceKHR`]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VkSurfaceKHR.html
-    /// [`wgpu::Surface`]: https://docs.rs/wgpu/latest/wgpu/struct.Surface.html
-    ///
-    /// ## iOS
-    ///
-    /// On iOS, the `Resumed` event is emitted in response to an [`applicationDidBecomeActive`]
-    /// callback which means the application is "active" (according to the
-    /// [iOS application lifecycle]).
-    ///
-    /// [`applicationDidBecomeActive`]: https://developer.apple.com/documentation/uikit/uiapplicationdelegate/1622956-applicationdidbecomeactive
-    /// [iOS application lifecycle]: https://developer.apple.com/documentation/uikit/app_and_environment/managing_your_app_s_life_cycle
-    ///
-    /// ## Web
-    ///
-    /// 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
-    /// stores a complete snapshot of a page (including the JavaScript heap) as the
-    /// user is navigating away.
-    ///
-    /// [`pageshow`]: https://developer.mozilla.org/en-US/docs/Web/API/Window/pageshow_event
-    /// [`persisted`]: https://developer.mozilla.org/en-US/docs/Web/API/PageTransitionEvent/persisted
-    /// [`bfcache`]: https://web.dev/bfcache/
-    ///
-    /// [`Suspended`]: Self::Suspended
+    /// [`ApplicationHandler::resumed`]: crate::application::ApplicationHandler::resumed
     Resumed,
 
-    /// Emitted when the event loop is about to block and wait for new events.
+    /// See [`ApplicationHandler::about_to_wait`] for details.
     ///
-    /// 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.
-    ///
-    /// High frequency event sources, such as input devices could potentially lead to lots of wake
-    /// ups and also lots of corresponding `AboutToWait` events.
-    ///
-    /// This is not an ideal event to drive application rendering from and instead applications
-    /// should render in response to [`WindowEvent::RedrawRequested`] events.
+    /// [`ApplicationHandler::about_to_wait`]: crate::application::ApplicationHandler::about_to_wait
     AboutToWait,
 
-    /// Emitted when the event loop is being shut down.
+    /// See [`ApplicationHandler::exiting`] for details.
     ///
-    /// 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.
+    /// [`ApplicationHandler::exiting`]: crate::application::ApplicationHandler::exiting
     LoopExiting,
 
-    /// Emitted when the application has received a memory warning.
+    /// See [`ApplicationHandler::memory_warning`] for details.
     ///
-    /// ## 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.
+    /// [`ApplicationHandler::memory_warning`]: crate::application::ApplicationHandler::memory_warning
     MemoryWarning,
 }
 
@@ -307,7 +166,7 @@ pub enum WindowEvent {
     /// The activation token was delivered back and now could be used.
     ///
     #[cfg_attr(
-        not(any(x11_platform, wayland_platfrom)),
+        not(any(x11_platform, wayland_platform)),
         allow(rustdoc::broken_intra_doc_links)
     )]
     /// Delivered in response to [`request_activation_token`].
@@ -445,21 +304,23 @@ pub enum WindowEvent {
         button: MouseButton,
     },
 
-    /// Touchpad magnification event with two-finger pinch gesture.
-    ///
-    /// Positive delta values indicate magnification (zooming in) and
-    /// negative delta values indicate shrinking (zooming out).
+    /// Two-finger pinch gesture, often used for magnification.
     ///
     /// ## Platform-specific
     ///
-    /// - Only available on **macOS**.
-    TouchpadMagnify {
+    /// - Only available on **macOS** and **iOS**.
+    /// - On iOS, not recognized by default. It must be enabled when needed.
+    PinchGesture {
         device_id: DeviceId,
+        /// Positive values indicate magnification (zooming in) and  negative
+        /// values indicate shrinking (zooming out).
+        ///
+        /// This value may be NaN.
         delta: f64,
         phase: TouchPhase,
     },
 
-    /// Smart magnification event.
+    /// Double tap gesture.
     ///
     /// On a Mac, smart magnification is triggered by a double tap with two fingers
     /// on the trackpad and is commonly used to zoom on a certain object
@@ -469,24 +330,26 @@ pub enum WindowEvent {
     /// The event is general enough that its generating gesture is allowed to vary
     /// across platforms. It could also be generated by another device.
     ///
-    /// Unfortunatly, neither [Windows](https://support.microsoft.com/en-us/windows/touch-gestures-for-windows-a9d28305-4818-a5df-4e2b-e5590f850741)
+    /// Unfortunately, neither [Windows](https://support.microsoft.com/en-us/windows/touch-gestures-for-windows-a9d28305-4818-a5df-4e2b-e5590f850741)
     /// nor [Wayland](https://wayland.freedesktop.org/libinput/doc/latest/gestures.html)
     /// support this gesture or any other gesture with the same effect.
     ///
     /// ## Platform-specific
     ///
-    /// - Only available on **macOS 10.8** and later.
-    SmartMagnify { device_id: DeviceId },
+    /// - Only available on **macOS 10.8** and later, and **iOS**.
+    /// - On iOS, not recognized by default. It must be enabled when needed.
+    DoubleTapGesture { device_id: DeviceId },
 
-    /// Touchpad rotation event with two-finger rotation gesture.
+    /// Two-finger rotation gesture.
     ///
     /// Positive delta values indicate rotation counterclockwise and
     /// negative delta values indicate rotation clockwise.
     ///
     /// ## Platform-specific
     ///
-    /// - Only available on **macOS**.
-    TouchpadRotate {
+    /// - Only available on **macOS** and **iOS**.
+    /// - On iOS, not recognized by default. It must be enabled when needed.
+    RotationGesture {
         device_id: DeviceId,
         delta: f32,
         phase: TouchPhase,
@@ -530,11 +393,10 @@ pub enum WindowEvent {
     /// * Changing the display's scale factor (e.g. in Control Panel on Windows).
     /// * Moving the window to a display with a different scale factor.
     ///
-    /// After this event callback has been processed, the window will be resized to whatever value
-    /// is pointed to by the `new_inner_size` reference. By default, this will contain the size suggested
-    /// by the OS, but it can be changed to any value.
+    /// To update the window size, use the provided [`InnerSizeWriter`] handle. By default, the window is
+    /// resized to the value suggested by the OS, but it can be changed to any value.
     ///
-    /// For more information about DPI in general, see the [`dpi`](crate::dpi) module.
+    /// For more information about DPI in general, see the [`dpi`] crate.
     ScaleFactorChanged {
         scale_factor: f64,
         /// Handle to update inner size during scale changes.
@@ -776,6 +638,31 @@ pub struct KeyEvent {
     /// On some systems, holding down a key for some period of time causes that key to be repeated
     /// as though it were being pressed and released repeatedly. This field is `true` if and only if
     /// this event is the result of one of those repeats.
+    ///
+    /// # Example
+    ///
+    /// In games, you often want to ignore repated key events - this can be
+    /// done by ignoring events where this property is set.
+    ///
+    /// ```
+    /// use winit::event::{WindowEvent, KeyEvent, ElementState};
+    /// use winit::keyboard::{KeyCode, PhysicalKey};
+    /// # let window_event = WindowEvent::RedrawRequested; // To make the example compile
+    /// match window_event {
+    ///     WindowEvent::KeyboardInput {
+    ///         event: KeyEvent {
+    ///             physical_key: PhysicalKey::Code(KeyCode::KeyW),
+    ///             state: ElementState::Pressed,
+    ///             repeat: false,
+    ///             ..
+    ///         },
+    ///         ..
+    ///     } => {
+    ///          // The physical key `W` was pressed, and it was not a repeat
+    ///     }
+    ///     _ => {} // Handle other events
+    /// }
+    /// ```
     pub repeat: bool,
 
     /// Platform-specific key event information.
@@ -1107,7 +994,7 @@ pub enum MouseScrollDelta {
     PixelDelta(PhysicalPosition<f64>),
 }
 
-/// Handle to synchroniously change the size of the window from the
+/// Handle to synchronously change the size of the window from the
 /// [`WindowEvent`].
 #[derive(Debug, Clone)]
 pub struct InnerSizeWriter {
@@ -1120,7 +1007,7 @@ impl InnerSizeWriter {
         Self { new_inner_size }
     }
 
-    /// Try to request inner size which will be set synchroniously on the window.
+    /// Try to request inner size which will be set synchronously on the window.
     pub fn request_inner_size(
         &mut self,
         new_inner_size: PhysicalSize<u32>,
@@ -1199,13 +1086,13 @@ mod tests {
                     state: event::ElementState::Pressed,
                     button: event::MouseButton::Other(0),
                 });
-                with_window_event(TouchpadMagnify {
+                with_window_event(PinchGesture {
                     device_id: did,
                     delta: 0.0,
                     phase: event::TouchPhase::Started,
                 });
-                with_window_event(SmartMagnify { device_id: did });
-                with_window_event(TouchpadRotate {
+                with_window_event(DoubleTapGesture { device_id: did });
+                with_window_event(RotationGesture {
                     device_id: did,
                     delta: 0.0,
                     phase: event::TouchPhase::Started,

src/event_loop.rs

@@ -8,18 +8,19 @@
 //! See the root-level documentation for information on how to create and use an event loop to
 //! handle events.
 use std::marker::PhantomData;
-use std::ops::Deref;
 #[cfg(any(x11_platform, wayland_platform))]
 use std::os::unix::io::{AsFd, AsRawFd, BorrowedFd, RawFd};
 use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
 use std::{error, fmt};
 
-#[cfg(not(wasm_platform))]
+#[cfg(not(web_platform))]
 use std::time::{Duration, Instant};
-#[cfg(wasm_platform)]
+#[cfg(web_platform)]
 use web_time::{Duration, Instant};
 
-use crate::error::EventLoopError;
+use crate::application::ApplicationHandler;
+use crate::error::{EventLoopError, OsError};
+use crate::window::{CustomCursor, CustomCursorSource, Window, WindowAttributes};
 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
@@ -45,11 +46,9 @@ pub struct EventLoop<T: 'static> {
 /// Target that associates windows with an [`EventLoop`].
 ///
 /// This type exists to allow you to create new windows while Winit executes
-/// your callback. [`EventLoop`] will coerce into this type (`impl<T> Deref for
-/// EventLoop<T>`), so functions that take this as a parameter can also take
-/// `&EventLoop`.
-pub struct EventLoopWindowTarget<T: 'static> {
-    pub(crate) p: platform_impl::EventLoopWindowTarget<T>,
+/// your callback.
+pub struct ActiveEventLoop {
+    pub(crate) p: platform_impl::ActiveEventLoop,
     pub(crate) _marker: PhantomData<*mut ()>, // Not Send nor Sync
 }
 
@@ -57,33 +56,26 @@ pub struct EventLoopWindowTarget<T: 'static> {
 ///
 /// This is used to make specifying options that affect the whole application
 /// easier. But note that constructing multiple event loops is not supported.
+///
+/// This can be created using [`EventLoop::new`] or [`EventLoop::with_user_event`].
 #[derive(Default)]
 pub struct EventLoopBuilder<T: 'static> {
     pub(crate) platform_specific: platform_impl::PlatformSpecificEventLoopAttributes,
     _p: PhantomData<T>,
 }
 
+static EVENT_LOOP_CREATED: AtomicBool = AtomicBool::new(false);
+
 impl EventLoopBuilder<()> {
     /// Start building a new event loop.
     #[inline]
+    #[deprecated = "use `EventLoop::builder` instead"]
     pub fn new() -> Self {
-        Self::with_user_event()
+        EventLoop::builder()
     }
 }
 
-static EVENT_LOOP_CREATED: AtomicBool = AtomicBool::new(false);
-
 impl<T> EventLoopBuilder<T> {
-    /// Start building a new event loop, with the given type as the user event
-    /// type.
-    #[inline]
-    pub fn with_user_event() -> Self {
-        Self {
-            platform_specific: Default::default(),
-            _p: PhantomData,
-        }
-    }
-
     /// Builds a new event loop.
     ///
     /// ***For cross-platform compatibility, the [`EventLoop`] must be created on the main thread,
@@ -118,6 +110,8 @@ impl<T> EventLoopBuilder<T> {
     )]
     #[inline]
     pub fn build(&mut self) -> Result<EventLoop<T>, EventLoopError> {
+        let _span = tracing::debug_span!("winit::EventLoopBuilder::build").entered();
+
         if EVENT_LOOP_CREATED.swap(true, Ordering::Relaxed) {
             return Err(EventLoopError::RecreationAttempt);
         }
@@ -130,7 +124,7 @@ impl<T> EventLoopBuilder<T> {
         })
     }
 
-    #[cfg(wasm_platform)]
+    #[cfg(web_platform)]
     pub(crate) fn allow_event_loop_recreation() {
         EVENT_LOOP_CREATED.store(false, Ordering::Relaxed);
     }
@@ -142,13 +136,13 @@ impl<T> fmt::Debug for EventLoop<T> {
     }
 }
 
-impl<T> fmt::Debug for EventLoopWindowTarget<T> {
+impl fmt::Debug for ActiveEventLoop {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.pad("EventLoopWindowTarget { .. }")
+        f.pad("ActiveEventLoop { .. }")
     }
 }
 
-/// Set through [`EventLoopWindowTarget::set_control_flow()`].
+/// Set through [`ActiveEventLoop::set_control_flow()`].
 ///
 /// Indicates the desired behavior of the event loop after [`Event::AboutToWait`] is emitted.
 ///
@@ -193,26 +187,51 @@ impl ControlFlow {
 }
 
 impl EventLoop<()> {
-    /// Alias for [`EventLoopBuilder::new().build()`].
+    /// Create the event loop.
     ///
-    /// [`EventLoopBuilder::new().build()`]: EventLoopBuilder::build
+    /// This is an alias of `EventLoop::builder().build()`.
     #[inline]
     pub fn new() -> Result<EventLoop<()>, EventLoopError> {
-        EventLoopBuilder::new().build()
+        Self::builder().build()
+    }
+
+    /// Start building a new event loop.
+    ///
+    /// This returns an [`EventLoopBuilder`], to allow configuring the event loop before creation.
+    ///
+    /// To get the actual event loop, call [`build`][EventLoopBuilder::build] on that.
+    #[inline]
+    pub fn builder() -> EventLoopBuilder<()> {
+        Self::with_user_event()
     }
 }
 
 impl<T> EventLoop<T> {
-    #[deprecated = "Use `EventLoopBuilder::<T>::with_user_event().build()` instead."]
-    pub fn with_user_event() -> Result<EventLoop<T>, EventLoopError> {
-        EventLoopBuilder::<T>::with_user_event().build()
+    /// Start building a new event loop, with the given type as the user event
+    /// type.
+    pub fn with_user_event() -> EventLoopBuilder<T> {
+        EventLoopBuilder {
+            platform_specific: Default::default(),
+            _p: PhantomData,
+        }
     }
 
-    /// Runs the event loop in the calling thread and calls the given `event_handler` closure
-    /// to dispatch any pending events.
+    /// See [`run_app`].
     ///
-    /// Since the closure is `'static`, it must be a `move` closure if it needs to
-    /// access any data from the calling context.
+    /// [`run_app`]: Self::run_app
+    #[inline]
+    #[deprecated = "use `EventLoop::run_app` instead"]
+    #[cfg(not(all(web_platform, target_feature = "exception-handling")))]
+    pub fn run<F>(self, event_handler: F) -> Result<(), EventLoopError>
+    where
+        F: FnMut(Event<T>, &ActiveEventLoop),
+    {
+        let _span = tracing::debug_span!("winit::EventLoop::run").entered();
+
+        self.event_loop.run(event_handler)
+    }
+
+    /// Run the application with the event loop on the calling thread.
     ///
     /// See the [`set_control_flow()`] docs on how to change the event loop's behavior.
     ///
@@ -226,41 +245,101 @@ impl<T> EventLoop<T> {
     ///
     ///   Web applications are recommended to use
     #[cfg_attr(
-        wasm_platform,
-        doc = "[`EventLoopExtWebSys::spawn()`][crate::platform::web::EventLoopExtWebSys::spawn()]"
+        web_platform,
+        doc = "[`EventLoopExtWebSys::spawn_app()`][crate::platform::web::EventLoopExtWebSys::spawn_app()]"
     )]
-    #[cfg_attr(not(wasm_platform), doc = "`EventLoopExtWebSys::spawn()`")]
-    ///   [^1] instead of [`run()`] to avoid the need
+    #[cfg_attr(not(web_platform), doc = "`EventLoopExtWebSys::spawn()`")]
+    ///   [^1] instead of [`run_app()`] 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()
-    /// [`run()`]: Self::run()
-    /// [^1]: `EventLoopExtWebSys::spawn()` is only available on WASM.
+    /// [`set_control_flow()`]: ActiveEventLoop::set_control_flow()
+    /// [`run_app()`]: Self::run_app()
+    /// [^1]: `EventLoopExtWebSys::spawn_app()` is only available on Web.
     #[inline]
-    #[cfg(not(all(wasm_platform, target_feature = "exception-handling")))]
-    pub fn run<F>(self, event_handler: F) -> Result<(), EventLoopError>
-    where
-        F: FnMut(Event<T>, &EventLoopWindowTarget<T>),
-    {
-        self.event_loop.run(event_handler)
+    #[cfg(not(all(web_platform, target_feature = "exception-handling")))]
+    pub fn run_app<A: ApplicationHandler<T>>(self, app: &mut A) -> Result<(), EventLoopError> {
+        self.event_loop
+            .run(|event, event_loop| dispatch_event_for_app(app, event_loop, event))
     }
 
-    /// Creates an [`EventLoopProxy`] that can be used to dispatch user events to the main event loop.
+    /// Creates an [`EventLoopProxy`] that can be used to dispatch user events
+    /// to the main event loop, possibly from another thread.
     pub fn create_proxy(&self) -> EventLoopProxy<T> {
         EventLoopProxy {
             event_loop_proxy: self.event_loop.create_proxy(),
         }
     }
+
+    /// Gets a persistent reference to the underlying platform display.
+    ///
+    /// See the [`OwnedDisplayHandle`] type for more information.
+    pub fn owned_display_handle(&self) -> OwnedDisplayHandle {
+        OwnedDisplayHandle {
+            platform: self.event_loop.window_target().p.owned_display_handle(),
+        }
+    }
+
+    /// Change if or when [`DeviceEvent`]s are captured.
+    ///
+    /// See [`ActiveEventLoop::listen_device_events`] for details.
+    ///
+    /// [`DeviceEvent`]: crate::event::DeviceEvent
+    pub fn listen_device_events(&self, allowed: DeviceEvents) {
+        let _span = tracing::debug_span!(
+            "winit::EventLoop::listen_device_events",
+            allowed = ?allowed
+        )
+        .entered();
+
+        self.event_loop
+            .window_target()
+            .p
+            .listen_device_events(allowed);
+    }
+
+    /// Sets the [`ControlFlow`].
+    pub fn set_control_flow(&self, control_flow: ControlFlow) {
+        self.event_loop
+            .window_target()
+            .p
+            .set_control_flow(control_flow)
+    }
+
+    /// Create a window.
+    ///
+    /// Creating window without event loop running often leads to improper window creation;
+    /// use [`ActiveEventLoop::create_window`] instead.
+    #[deprecated = "use `ActiveEventLoop::create_window` instead"]
+    #[inline]
+    pub fn create_window(&self, window_attributes: WindowAttributes) -> Result<Window, OsError> {
+        let _span = tracing::debug_span!(
+            "winit::EventLoop::create_window",
+            window_attributes = ?window_attributes
+        )
+        .entered();
+
+        let window =
+            platform_impl::Window::new(&self.event_loop.window_target().p, window_attributes)?;
+        Ok(Window { window })
+    }
+
+    /// Create custom cursor.
+    pub fn create_custom_cursor(&self, custom_cursor: CustomCursorSource) -> CustomCursor {
+        self.event_loop
+            .window_target()
+            .p
+            .create_custom_cursor(custom_cursor)
+    }
 }
 
 #[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)
+        rwh_06::HasDisplayHandle::display_handle(self.event_loop.window_target())
     }
 }
 
@@ -268,7 +347,7 @@ impl<T> rwh_06::HasDisplayHandle for EventLoop<T> {
 unsafe impl<T> rwh_05::HasRawDisplayHandle for EventLoop<T> {
     /// Returns a [`rwh_05::RawDisplayHandle`] for the event loop.
     fn raw_display_handle(&self) -> rwh_05::RawDisplayHandle {
-        rwh_05::HasRawDisplayHandle::raw_display_handle(&**self)
+        rwh_05::HasRawDisplayHandle::raw_display_handle(self.event_loop.window_target())
     }
 }
 
@@ -276,11 +355,11 @@ unsafe impl<T> rwh_05::HasRawDisplayHandle for EventLoop<T> {
 impl<T> AsFd for EventLoop<T> {
     /// Get the underlying [EventLoop]'s `fd` which you can register
     /// into other event loop, like [`calloop`] or [`mio`]. When doing so, the
-    /// loop must be polled with the [`pump_events`] API.
+    /// loop must be polled with the [`pump_app_events`] API.
     ///
     /// [`calloop`]: https://crates.io/crates/calloop
     /// [`mio`]: https://crates.io/crates/mio
-    /// [`pump_events`]: crate::platform::pump_events::EventLoopExtPumpEvents::pump_events
+    /// [`pump_app_events`]: crate::platform::pump_events::EventLoopExtPumpEvents::pump_app_events
     fn as_fd(&self) -> BorrowedFd<'_> {
         self.event_loop.as_fd()
     }
@@ -290,27 +369,49 @@ impl<T> AsFd for EventLoop<T> {
 impl<T> AsRawFd for EventLoop<T> {
     /// Get the underlying [EventLoop]'s raw `fd` which you can register
     /// into other event loop, like [`calloop`] or [`mio`]. When doing so, the
-    /// loop must be polled with the [`pump_events`] API.
+    /// loop must be polled with the [`pump_app_events`] API.
     ///
     /// [`calloop`]: https://crates.io/crates/calloop
     /// [`mio`]: https://crates.io/crates/mio
-    /// [`pump_events`]: crate::platform::pump_events::EventLoopExtPumpEvents::pump_events
+    /// [`pump_app_events`]: crate::platform::pump_events::EventLoopExtPumpEvents::pump_app_events
     fn as_raw_fd(&self) -> RawFd {
         self.event_loop.as_raw_fd()
     }
 }
 
-impl<T> Deref for EventLoop<T> {
-    type Target = EventLoopWindowTarget<T>;
-    fn deref(&self) -> &EventLoopWindowTarget<T> {
-        self.event_loop.window_target()
-    }
-}
+impl ActiveEventLoop {
+    /// Create the window.
+    ///
+    /// Possible causes of error include denied permission, incompatible system, and lack of memory.
+    ///
+    /// ## Platform-specific
+    ///
+    /// - **Web:** The window is created but not inserted into the web page automatically. Please
+    ///   see the web platform module for more information.
+    #[inline]
+    pub fn create_window(&self, window_attributes: WindowAttributes) -> Result<Window, OsError> {
+        let _span = tracing::debug_span!(
+            "winit::ActiveEventLoop::create_window",
+            window_attributes = ?window_attributes
+        )
+        .entered();
+
+        let window = platform_impl::Window::new(&self.p, window_attributes)?;
+        Ok(Window { window })
+    }
+
+    /// Create custom cursor.
+    pub fn create_custom_cursor(&self, custom_cursor: CustomCursorSource) -> CustomCursor {
+        let _span = tracing::debug_span!("winit::ActiveEventLoop::create_custom_cursor",).entered();
+
+        self.p.create_custom_cursor(custom_cursor)
+    }
 
-impl<T> EventLoopWindowTarget<T> {
     /// Returns the list of all the monitors available on the system.
     #[inline]
     pub fn available_monitors(&self) -> impl Iterator<Item = MonitorHandle> {
+        let _span = tracing::debug_span!("winit::ActiveEventLoop::available_monitors",).entered();
+
         #[allow(clippy::useless_conversion)] // false positive on some platforms
         self.p
             .available_monitors()
@@ -327,6 +428,8 @@ impl<T> EventLoopWindowTarget<T> {
     /// **Wayland / Web:** Always returns `None`.
     #[inline]
     pub fn primary_monitor(&self) -> Option<MonitorHandle> {
+        let _span = tracing::debug_span!("winit::ActiveEventLoop::primary_monitor",).entered();
+
         self.p
             .primary_monitor()
             .map(|inner| MonitorHandle { inner })
@@ -344,6 +447,12 @@ impl<T> EventLoopWindowTarget<T> {
     ///
     /// [`DeviceEvent`]: crate::event::DeviceEvent
     pub fn listen_device_events(&self, allowed: DeviceEvents) {
+        let _span = tracing::debug_span!(
+            "winit::ActiveEventLoop::listen_device_events",
+            allowed = ?allowed
+        )
+        .entered();
+
         self.p.listen_device_events(allowed);
     }
 
@@ -361,6 +470,8 @@ impl<T> EventLoopWindowTarget<T> {
     ///
     /// See [`LoopExiting`](Event::LoopExiting).
     pub fn exit(&self) {
+        let _span = tracing::debug_span!("winit::ActiveEventLoop::exit",).entered();
+
         self.p.exit()
     }
 
@@ -370,10 +481,19 @@ impl<T> EventLoopWindowTarget<T> {
     pub fn exiting(&self) -> bool {
         self.p.exiting()
     }
+
+    /// Gets a persistent reference to the underlying platform display.
+    ///
+    /// See the [`OwnedDisplayHandle`] type for more information.
+    pub fn owned_display_handle(&self) -> OwnedDisplayHandle {
+        OwnedDisplayHandle {
+            platform: self.p.owned_display_handle(),
+        }
+    }
 }
 
 #[cfg(feature = "rwh_06")]
-impl<T> rwh_06::HasDisplayHandle for EventLoopWindowTarget<T> {
+impl rwh_06::HasDisplayHandle for ActiveEventLoop {
     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.
@@ -382,13 +502,59 @@ impl<T> rwh_06::HasDisplayHandle for EventLoopWindowTarget<T> {
 }
 
 #[cfg(feature = "rwh_05")]
-unsafe impl<T> rwh_05::HasRawDisplayHandle for EventLoopWindowTarget<T> {
+unsafe impl rwh_05::HasRawDisplayHandle for ActiveEventLoop {
     /// Returns a [`rwh_05::RawDisplayHandle`] for the event loop.
     fn raw_display_handle(&self) -> rwh_05::RawDisplayHandle {
         self.p.raw_display_handle_rwh_05()
     }
 }
 
+/// A proxy for the underlying display handle.
+///
+/// The purpose of this type is to provide a cheaply clonable handle to the underlying
+/// display handle. This is often used by graphics APIs to connect to the underlying APIs.
+/// It is difficult to keep a handle to the [`EventLoop`] type or the [`ActiveEventLoop`]
+/// type. In contrast, this type involves no lifetimes and can be persisted for as long as
+/// needed.
+///
+/// For all platforms, this is one of the following:
+///
+/// - A zero-sized type that is likely optimized out.
+/// - A reference-counted pointer to the underlying type.
+#[derive(Clone)]
+pub struct OwnedDisplayHandle {
+    #[cfg_attr(not(any(feature = "rwh_05", feature = "rwh_06")), allow(dead_code))]
+    platform: platform_impl::OwnedDisplayHandle,
+}
+
+impl fmt::Debug for OwnedDisplayHandle {
+    #[inline]
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("OwnedDisplayHandle").finish_non_exhaustive()
+    }
+}
+
+#[cfg(feature = "rwh_06")]
+impl rwh_06::HasDisplayHandle for OwnedDisplayHandle {
+    #[inline]
+    fn display_handle(&self) -> Result<rwh_06::DisplayHandle<'_>, rwh_06::HandleError> {
+        let raw = self.platform.raw_display_handle_rwh_06()?;
+
+        // SAFETY: The underlying display handle should be safe.
+        let handle = unsafe { rwh_06::DisplayHandle::borrow_raw(raw) };
+
+        Ok(handle)
+    }
+}
+
+#[cfg(feature = "rwh_05")]
+unsafe impl rwh_05::HasRawDisplayHandle for OwnedDisplayHandle {
+    #[inline]
+    fn raw_display_handle(&self) -> rwh_05::RawDisplayHandle {
+        self.platform.raw_display_handle_rwh_05()
+    }
+}
+
 /// Used to send custom events to [`EventLoop`].
 pub struct EventLoopProxy<T: 'static> {
     event_loop_proxy: platform_impl::EventLoopProxy<T>,
@@ -411,6 +577,8 @@ impl<T: 'static> EventLoopProxy<T> {
     ///
     /// [`UserEvent(event)`]: Event::UserEvent
     pub fn send_event(&self, event: T) -> Result<(), EventLoopClosed<T>> {
+        let _span = tracing::debug_span!("winit::EventLoopProxy::send_event",).entered();
+
         self.event_loop_proxy.send_event(event)
     }
 }
@@ -453,7 +621,7 @@ pub enum DeviceEvents {
 /// 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
+/// One of the handling scenarios 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.
@@ -473,3 +641,23 @@ impl AsyncRequestSerial {
         Self { serial }
     }
 }
+
+/// Shim for various run APIs.
+#[inline(always)]
+pub(crate) fn dispatch_event_for_app<T: 'static, A: ApplicationHandler<T>>(
+    app: &mut A,
+    event_loop: &ActiveEventLoop,
+    event: Event<T>,
+) {
+    match event {
+        Event::NewEvents(cause) => app.new_events(event_loop, cause),
+        Event::WindowEvent { window_id, event } => app.window_event(event_loop, window_id, event),
+        Event::DeviceEvent { device_id, event } => app.device_event(event_loop, device_id, event),
+        Event::UserEvent(event) => app.user_event(event_loop, event),
+        Event::Suspended => app.suspended(event_loop),
+        Event::Resumed => app.resumed(event_loop),
+        Event::AboutToWait => app.about_to_wait(event_loop),
+        Event::LoopExiting => app.exiting(event_loop),
+        Event::MemoryWarning => app.memory_warning(event_loop),
+    }
+}

src/icon.rs

@@ -118,6 +118,8 @@ impl Icon {
     /// The length of `rgba` must be divisible by 4, and `width * height` must equal
     /// `rgba.len() / 4`. Otherwise, this will return a `BadIcon` error.
     pub fn from_rgba(rgba: Vec<u8>, width: u32, height: u32) -> Result<Self, BadIcon> {
+        let _span = tracing::debug_span!("winit::Icon::from_rgba", width, height).entered();
+
         Ok(Icon {
             inner: PlatformIcon::from_rgba(rgba, width, height)?,
         })

src/keyboard.rs

@@ -20,7 +20,7 @@
 // the W3C short notice apply to the `Key` and `KeyCode` enums and their variants and the
 // documentation attached to their variants.
 
-// --------- BEGGINING OF W3C LICENSE --------------------------------------------------------------
+// --------- BEGINNING OF W3C LICENSE --------------------------------------------------------------
 //
 // License
 //
@@ -55,7 +55,7 @@
 //
 // --------- END OF W3C LICENSE --------------------------------------------------------------------
 
-// --------- BEGGINING OF W3C SHORT NOTICE ---------------------------------------------------------
+// --------- BEGINNING OF W3C SHORT NOTICE ---------------------------------------------------------
 //
 // winit: https://github.com/rust-windowing/winit
 //
@@ -69,6 +69,9 @@
 //
 // --------- END OF W3C SHORT NOTICE ---------------------------------------------------------------
 
+use bitflags::bitflags;
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
 pub use smol_str::SmolStr;
 
 /// Contains the platform-native physical key identifier
@@ -741,7 +744,7 @@ pub enum KeyCode {
 /// - The `Super` variant here, is named `Meta` in the aforementioned specification. (There's
 ///   another key which the specification calls `Super`. That does not exist here.)
 /// - The `Space` variant here, can be identified by the character it generates in the
-///   specificaiton.
+///   specification.
 ///
 /// [`KeyboardEvent.key`]: https://w3c.github.io/uievents-key/
 #[non_exhaustive]
@@ -911,7 +914,7 @@ pub enum NamedKey {
     Standby,
     /// The WakeUp key. (`KEYCODE_WAKEUP`)
     WakeUp,
-    /// Initate the multi-candidate mode.
+    /// Initiate the multi-candidate mode.
     AllCandidates,
     Alphanumeric,
     /// Initiate the Code Input mode to allow characters to be entered by
@@ -1456,7 +1459,7 @@ pub enum NamedKey {
 /// This is a superset of the UI Events Specification's [`KeyboardEvent.key`] with
 /// additions:
 /// - All simple variants are wrapped under the `Named` variant
-/// - The `Unidentified` variant here, can still identifiy a key through it's `NativeKeyCode`.
+/// - The `Unidentified` variant here, can still identify a key through it's `NativeKeyCode`.
 /// - The `Dead` variant here, can specify the character which is inserted when pressing the
 ///   dead-key twice.
 ///

src/lib.rs

@@ -2,22 +2,15 @@
 //!
 //! # Building windows
 //!
-//! Before you can build a [`Window`], you first need to build an [`EventLoop`]. This is done with the
-//! [`EventLoop::new()`] function.
+//! Before you can create a [`Window`], you first need to build an [`EventLoop`]. This is done with
+//! the [`EventLoop::new()`] function.
 //!
 //! ```no_run
 //! use winit::event_loop::EventLoop;
 //! let event_loop = EventLoop::new().unwrap();
 //! ```
 //!
-//! Once this is done, there are two ways to create a [`Window`]:
-//!
-//!  - Calling [`Window::new(&event_loop)`][window_new].
-//!  - Calling [`let builder = WindowBuilder::new()`][window_builder_new] then [`builder.build(&event_loop)`][window_builder_build].
-//!
-//! The first method is the simplest and will give you default values for everything. The second
-//! method allows you to customize the way your [`Window`] will look and behave by modifying the
-//! fields of the [`WindowBuilder`] object before you create the [`Window`].
+//! Then you create a [`Window`] with [`create_window`].
 //!
 //! # Event handling
 //!
@@ -28,7 +21,7 @@
 //! Some user activity, like mouse movement, can generate both a [`WindowEvent`] *and* a
 //! [`DeviceEvent`]. You can also create and handle your own custom [`Event::UserEvent`]s, if desired.
 //!
-//! You can retrieve events by calling [`EventLoop::run()`]. This function will
+//! You can retrieve events by calling [`EventLoop::run_app()`]. 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`].
 //!
@@ -43,7 +36,7 @@
         x11_platform,
         wayland_platform
     ),
-    doc = "[`EventLoopExtPumpEvents::pump_events()`][platform::pump_events::EventLoopExtPumpEvents::pump_events()]"
+    doc = "[`EventLoopExtPumpEvents::pump_app_events()`][platform::pump_events::EventLoopExtPumpEvents::pump_app_events()]"
 )]
 #![cfg_attr(
     not(any(
@@ -53,21 +46,56 @@
         x11_platform,
         wayland_platform
     )),
-    doc = "`EventLoopExtPumpEvents::pump_events()`"
+    doc = "`EventLoopExtPumpEvents::pump_app_events()`"
 )]
 //! [^1]. 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},
-//!     window::WindowBuilder,
-//! };
+//! use winit::application::ApplicationHandler;
+//! use winit::event::WindowEvent;
+//! use winit::event_loop::{ActiveEventLoop, ControlFlow, EventLoop};
+//! use winit::window::{Window, WindowId};
+//!
+//! #[derive(Default)]
+//! struct App {
+//!     window: Option<Window>,
+//! }
+//!
+//! impl ApplicationHandler for App {
+//!     fn resumed(&mut self, event_loop: &ActiveEventLoop) {
+//!         self.window = Some(event_loop.create_window(Window::default_attributes()).unwrap());
+//!     }
+//!
+//!     fn window_event(&mut self, event_loop: &ActiveEventLoop, id: WindowId, event: WindowEvent) {
+//!         match event {
+//!             WindowEvent::CloseRequested => {
+//!                 println!("The close button was pressed; stopping");
+//!                 event_loop.exit();
+//!             },
+//!             WindowEvent::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
+//!                 // the program to gracefully handle redraws requested by the OS.
+//!
+//!                 // Draw.
+//!
+//!                 // Queue a RedrawRequested event.
+//!                 //
+//!                 // You only need to call this if you've determined that you need to redraw in
+//!                 // applications which do not always need to. Applications that redraw continuously
+//!                 // can render here instead.
+//!                 self.window.as_ref().unwrap().request_redraw();
+//!             }
+//!             _ => (),
+//!         }
+//!     }
+//! }
 //!
 //! let event_loop = EventLoop::new().unwrap();
-//! 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.
@@ -78,38 +106,8 @@
 //! // input, and uses significantly less power/CPU time than ControlFlow::Poll.
 //! event_loop.set_control_flow(ControlFlow::Wait);
 //!
-//! event_loop.run(move |event, elwt| {
-//!     match event {
-//!         Event::WindowEvent {
-//!             event: WindowEvent::CloseRequested,
-//!             ..
-//!         } => {
-//!             println!("The close button was pressed; stopping");
-//!             elwt.exit();
-//!         },
-//!         Event::AboutToWait => {
-//!             // Application update code.
-//!
-//!             // Queue a RedrawRequested event.
-//!             //
-//!             // You only need to call this if you've determined that you need to redraw in
-//!             // applications which do not always need to. Applications that redraw continuously
-//!             // can render here instead.
-//!             window.request_redraw();
-//!         },
-//!         Event::WindowEvent {
-//!             event: WindowEvent::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
-//!             // the program to gracefully handle redraws requested by the OS.
-//!         },
-//!         _ => ()
-//!     }
-//! });
+//! let mut app = App::default();
+//! event_loop.run_app(&mut app);
 //! ```
 //!
 //! [`WindowEvent`] has a [`WindowId`] member. In multi-window environments, it should be
@@ -126,19 +124,54 @@
 //! Note that many platforms will display garbage data in the window's client area if the
 //! application doesn't render anything to the window by the time the desktop compositor is ready to
 //! display the window to the user. If you notice this happening, you should create the window with
-//! [`visible` set to `false`](crate::window::WindowBuilder::with_visible) and explicitly make the
+//! [`visible` set to `false`](crate::window::WindowAttributes::with_visible) and explicitly make the
 //! window visible only once you're ready to render into it.
 //!
+//! # UI scaling
+//!
+//! UI scaling is important, go read the docs for the [`dpi`] crate for an
+//! introduction.
+//!
+//! All of Winit's functions return physical types, but can take either logical or physical
+//! coordinates as input, allowing you to use the most convenient coordinate system for your
+//! particular application.
+//!
+//! Winit will dispatch a [`ScaleFactorChanged`] event whenever a window's scale factor has changed.
+//! This can happen if the user drags their window from a standard-resolution monitor to a high-DPI
+//! monitor or if the user changes their DPI settings. This allows you to rescale your application's
+//! UI elements and adjust how the platform changes the window's size to reflect the new scale
+//! factor. If a window hasn't received a [`ScaleFactorChanged`] event, its scale factor
+//! can be found by calling [`window.scale_factor()`].
+//!
+//! [`ScaleFactorChanged`]: event::WindowEvent::ScaleFactorChanged
+//! [`window.scale_factor()`]: window::Window::scale_factor
+//!
+//! # Cargo Features
+//!
+//! Winit provides the following Cargo features:
+//!
+//! * `x11` (enabled by default): On Unix platforms, enables the X11 backend.
+//! * `wayland` (enabled by default): On Unix platforms, enables the Wayland
+//!   backend.
+//! * `rwh_04`: Implement `raw-window-handle v0.4` traits.
+//! * `rwh_05`: Implement `raw-window-handle v0.5` traits.
+//! * `rwh_06`: Implement `raw-window-handle v0.6` traits.
+//! * `serde`: Enables serialization/deserialization of certain types with
+//!   [Serde](https://crates.io/crates/serde).
+//! * `mint`: Enables mint (math interoperability standard types) conversions.
+//!
+//! See the [`platform`] module for documentation on platform-specific cargo
+//! features.
+//!
 //! [`EventLoop`]: event_loop::EventLoop
 //! [`EventLoop::new()`]: event_loop::EventLoop::new
-//! [`EventLoop::run()`]: event_loop::EventLoop::run
-//! [`exit()`]: event_loop::EventLoopWindowTarget::exit
+//! [`EventLoop::run_app()`]: event_loop::EventLoop::run_app
+//! [`exit()`]: event_loop::ActiveEventLoop::exit
 //! [`Window`]: window::Window
 //! [`WindowId`]: window::WindowId
-//! [`WindowBuilder`]: window::WindowBuilder
+//! [`WindowAttributes`]: window::WindowAttributes
 //! [window_new]: window::Window::new
-//! [window_builder_new]: window::WindowBuilder::new
-//! [window_builder_build]: window::WindowBuilder::build
+//! [`create_window`]: event_loop::ActiveEventLoop::create_window
 //! [`Window::id()`]: window::Window::id
 //! [`WindowEvent`]: event::WindowEvent
 //! [`DeviceEvent`]: event::DeviceEvent
@@ -146,53 +179,39 @@
 //! [`Event::LoopExiting`]: event::Event::LoopExiting
 //! [`raw_window_handle`]: ./window/struct.Window.html#method.raw_window_handle
 //! [`raw_display_handle`]: ./window/struct.Window.html#method.raw_display_handle
-//! [^1]: `EventLoopExtPumpEvents::pump_events()` is only available on Windows, macOS, Android, X11 and Wayland.
+//! [^1]: `EventLoopExtPumpEvents::pump_app_events()` is only available on Windows, macOS, Android, X11 and Wayland.
 
 #![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))]
+#![cfg_attr(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))]
+#![cfg_attr(
+    docsrs,
+    feature(doc_auto_cfg, doc_cfg_hide),
+    doc(cfg_hide(doc, docsrs))
+)]
 #![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;
-#[cfg(feature = "serde")]
-#[macro_use]
-extern crate serde;
-#[macro_use]
-extern crate bitflags;
+// Re-export DPI types so that users don't have to put it in Cargo.toml.
+#[doc(inline)]
+pub use dpi;
 
-pub mod dpi;
+pub mod application;
 #[macro_use]
 pub mod error;
+mod cursor;
 pub mod event;
 pub mod event_loop;
 mod icon;
 pub mod keyboard;
 pub mod monitor;
 mod platform_impl;
+mod utils;
 pub mod window;
 
 pub mod platform;
-
-/// Wrapper for objects which winit will access on the main thread so they are effectively `Send`
-/// and `Sync`, since they always execute on a single thread.
-///
-/// # Safety
-///
-/// Winit can run only one event loop at a time, and the event loop itself is tied to some thread.
-/// The objects could be sent across the threads, but once passed to winit, they execute on the
-/// main thread if the platform demands it. Thus, marking such objects as `Send + Sync` is safe.
-#[doc(hidden)]
-#[derive(Clone, Debug)]
-pub(crate) struct SendSyncWrapper<T>(pub(crate) T);
-
-unsafe impl<T> Send for SendSyncWrapper<T> {}
-unsafe impl<T> Sync for SendSyncWrapper<T> {}

src/monitor.rs

@@ -3,35 +3,39 @@
 //! If you want to get basic information about a monitor, you can use the
 //! [`MonitorHandle`] type. This is retrieved from one of the following
 //! methods, which return an iterator of [`MonitorHandle`]:
-//! - [`EventLoopWindowTarget::available_monitors`](crate::event_loop::EventLoopWindowTarget::available_monitors).
+//! - [`ActiveEventLoop::available_monitors`](crate::event_loop::ActiveEventLoop::available_monitors).
 //! - [`Window::available_monitors`](crate::window::Window::available_monitors).
 use crate::{
     dpi::{PhysicalPosition, PhysicalSize},
     platform_impl,
 };
 
+/// Deprecated! Use `VideoModeHandle` instead.
+#[deprecated = "Renamed to `VideoModeHandle`"]
+pub type VideoMode = VideoModeHandle;
+
 /// Describes a fullscreen video mode of a monitor.
 ///
 /// Can be acquired with [`MonitorHandle::video_modes`].
 #[derive(Clone, PartialEq, Eq, Hash)]
-pub struct VideoMode {
-    pub(crate) video_mode: platform_impl::VideoMode,
+pub struct VideoModeHandle {
+    pub(crate) video_mode: platform_impl::VideoModeHandle,
 }
 
-impl std::fmt::Debug for VideoMode {
+impl std::fmt::Debug for VideoModeHandle {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         self.video_mode.fmt(f)
     }
 }
 
-impl PartialOrd for VideoMode {
-    fn partial_cmp(&self, other: &VideoMode) -> Option<std::cmp::Ordering> {
+impl PartialOrd for VideoModeHandle {
+    fn partial_cmp(&self, other: &VideoModeHandle) -> Option<std::cmp::Ordering> {
         Some(self.cmp(other))
     }
 }
 
-impl Ord for VideoMode {
-    fn cmp(&self, other: &VideoMode) -> std::cmp::Ordering {
+impl Ord for VideoModeHandle {
+    fn cmp(&self, other: &VideoModeHandle) -> std::cmp::Ordering {
         self.monitor().cmp(&other.monitor()).then(
             self.size()
                 .cmp(&other.size())
@@ -45,7 +49,7 @@ impl Ord for VideoMode {
     }
 }
 
-impl VideoMode {
+impl VideoModeHandle {
     /// Returns the resolution of this video mode.
     #[inline]
     pub fn size(&self) -> PhysicalSize<u32> {
@@ -81,7 +85,7 @@ impl VideoMode {
     }
 }
 
-impl std::fmt::Display for VideoMode {
+impl std::fmt::Display for VideoModeHandle {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
         write!(
             f,
@@ -131,8 +135,8 @@ impl MonitorHandle {
     /// Return `Some` if succeed, or `None` if failed, which usually happens when the monitor
     /// the window is on is removed.
     ///
-    /// When using exclusive fullscreen, the refresh rate of the [`VideoMode`] that was used to
-    /// enter fullscreen should be used instead.
+    /// When using exclusive fullscreen, the refresh rate of the [`VideoModeHandle`] that was
+    /// used to enter fullscreen should be used instead.
     #[inline]
     pub fn refresh_rate_millihertz(&self) -> Option<u32> {
         self.inner.refresh_rate_millihertz()
@@ -141,7 +145,7 @@ impl MonitorHandle {
     /// Returns the scale factor of the underlying monitor. To map logical pixels to physical
     /// pixels and vice versa, use [`Window::scale_factor`].
     ///
-    /// See the [`dpi`](crate::dpi) module for more information.
+    /// See the [`dpi`] module for more information.
     ///
     /// ## Platform-specific
     ///
@@ -161,9 +165,9 @@ impl MonitorHandle {
     ///
     /// - **Web:** Always returns an empty iterator
     #[inline]
-    pub fn video_modes(&self) -> impl Iterator<Item = VideoMode> {
+    pub fn video_modes(&self) -> impl Iterator<Item = VideoModeHandle> {
         self.inner
             .video_modes()
-            .map(|video_mode| VideoMode { video_mode })
+            .map(|video_mode| VideoModeHandle { video_mode })
     }
 }

src/platform/android.rs

@@ -1,17 +1,83 @@
+//! # Android
+//!
+//! The Android backend builds on (and exposes types from) the [`ndk`](https://docs.rs/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
+//! various life-cycle events and synchronizing with the main JVM thread.
+//!
+//! Winit uses the [android-activity](https://docs.rs/android-activity/) as a
+//! glue crate (prior to `0.28` it used
+//! [ndk-glue](https://github.com/rust-windowing/android-ndk-rs/tree/master/ndk-glue)).
+//!
+//! The version of the glue crate that your application depends on _must_ match the
+//! version that Winit depends on because the glue crate is responsible for your
+//! application's main entry point. If Cargo resolves multiple versions, they will
+//! clash.
+//!
+//! `winit` glue compatibility table:
+//!
+//! | winit |       ndk-glue               |
+//! | :---: | :--------------------------: |
+//! | 0.29  | `android-activity = "0.5"`   |
+//! | 0.28  | `android-activity = "0.4"`   |
+//! | 0.27  | `ndk-glue = "0.7"`           |
+//! | 0.26  | `ndk-glue = "0.5"`           |
+//! | 0.25  | `ndk-glue = "0.3"`           |
+//! | 0.24  | `ndk-glue = "0.2"`           |
+//!
+//! The recommended way to avoid a conflict with the glue version is to avoid explicitly
+//! depending on the `android-activity` crate, and instead consume the API that
+//! is re-exported by Winit under `winit::platform::android::activity::*`
+//!
+//! Running on an Android device needs a dynamic system library. Add this to Cargo.toml:
+//!
+//! ```toml
+//! [lib]
+//! name = "main"
+//! crate-type = ["cdylib"]
+//! ```
+//!
+//! All Android applications are based on an `Activity` subclass, and the
+//! `android-activity` crate is designed to support different choices for this base
+//! class. Your application _must_ specify the base class it needs via a feature flag:
+//!
+//! | Base Class       | Feature Flag      |  Notes  |
+//! | :--------------: | :---------------: | :-----: |
+//! | `NativeActivity` | `android-native-activity` | Built-in to Android - it is possible to use without compiling any Java or Kotlin code. Java or Kotlin code may be needed to subclass `NativeActivity` to access some platform features. It does not derive from the [`AndroidAppCompat`] base class.|
+//! | [`GameActivity`] | `android-game-activity`   | Derives from [`AndroidAppCompat`], a defacto standard `Activity` base class that helps support a wider range of Android versions. Requires a build system that can compile Java or Kotlin and fetch Android dependencies from a [Maven repository][agdk_jetpack] (or link with an embedded [release][agdk_releases] of [`GameActivity`]) |
+//!
+//! [`GameActivity`]: https://developer.android.com/games/agdk/game-activity
+//! [`GameTextInput`]: https://developer.android.com/games/agdk/add-support-for-text-input
+//! [`AndroidAppCompat`]: https://developer.android.com/reference/androidx/appcompat/app/AppCompatActivity
+//! [agdk_jetpack]: https://developer.android.com/jetpack/androidx/releases/games
+//! [agdk_releases]: https://developer.android.com/games/agdk/download#agdk-libraries
+//! [Gradle]: https://developer.android.com/studio/build
+//!
+//! For more details, refer to these `android-activity` [example applications](https://github.com/rust-mobile/android-activity/tree/main/examples).
+//!
+//! ## Converting from `ndk-glue` to `android-activity`
+//!
+//! 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 = "0.29.14", 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).
+
 use crate::{
-    event_loop::{EventLoop, EventLoopBuilder, EventLoopWindowTarget},
-    window::{Window, WindowBuilder},
+    event_loop::{ActiveEventLoop, EventLoop, EventLoopBuilder},
+    window::{Window, WindowAttributes},
 };
 
-use android_activity::{AndroidApp, ConfigurationRef, Rect};
+use self::activity::{AndroidApp, ConfigurationRef, Rect};
 
 /// Additional methods on [`EventLoop`] that are specific to Android.
 pub trait EventLoopExtAndroid {}
 
 impl<T> EventLoopExtAndroid for EventLoop<T> {}
 
-/// Additional methods on [`EventLoopWindowTarget`] that are specific to Android.
-pub trait EventLoopWindowTargetExtAndroid {}
+/// Additional methods on [`ActiveEventLoop`] that are specific to Android.
+pub trait ActiveEventLoopExtAndroid {}
 
 /// Additional methods on [`Window`] that are specific to Android.
 pub trait WindowExtAndroid {
@@ -30,12 +96,12 @@ impl WindowExtAndroid for Window {
     }
 }
 
-impl<T> EventLoopWindowTargetExtAndroid for EventLoopWindowTarget<T> {}
+impl ActiveEventLoopExtAndroid for ActiveEventLoop {}
 
-/// Additional methods on [`WindowBuilder`] that are specific to Android.
-pub trait WindowBuilderExtAndroid {}
+/// Additional methods on [`WindowAttributes`] that are specific to Android.
+pub trait WindowAttributesExtAndroid {}
 
-impl WindowBuilderExtAndroid for WindowBuilder {}
+impl WindowAttributesExtAndroid for WindowAttributes {}
 
 pub trait EventLoopBuilderExtAndroid {
     /// Associates the `AndroidApp` that was passed to `android_main()` with the event loop
@@ -89,5 +155,16 @@ pub mod activity {
     // feature enabled, so we avoid inlining it so that they're forced to view
     // it on the crate's own docs.rs page.
     #[doc(no_inline)]
+    #[cfg(android_platform)]
     pub use android_activity::*;
+
+    #[cfg(not(android_platform))]
+    #[doc(hidden)]
+    pub struct Rect;
+    #[cfg(not(android_platform))]
+    #[doc(hidden)]
+    pub struct ConfigurationRef;
+    #[cfg(not(android_platform))]
+    #[doc(hidden)]
+    pub struct AndroidApp;
 }

src/platform/ios.rs

@@ -1,12 +1,75 @@
-use std::os::raw::c_void;
+//! # iOS / UIKit
+//!
+//! Winit has an OS requirement of iOS 8 or higher, and is regularly tested on
+//! iOS 9.3.
+//!
+//! iOS's main `UIApplicationMain` does some init work that's required by all
+//! UI-related code (see issue [#1705]). It is best to create your windows
+//! inside `Event::Resumed`.
+//!
+//! [#1705]: https://github.com/rust-windowing/winit/issues/1705
+//!
+//! ## Building app
+//!
+//! To build ios app you will need rustc built for this targets:
+//!
+//!  - armv7-apple-ios
+//!  - armv7s-apple-ios
+//!  - i386-apple-ios
+//!  - aarch64-apple-ios
+//!  - x86_64-apple-ios
+//!
+//! Then
+//!
+//! ```
+//! cargo build --target=...
+//! ```
+//! The simplest way to integrate your app into xcode environment is to build it
+//! as a static library. Wrap your main function and export it.
+//!
+//! ```rust, ignore
+//! #[no_mangle]
+//! pub extern fn start_winit_app() {
+//!     start_inner()
+//! }
+//!
+//! fn start_inner() {
+//!    ...
+//! }
+//! ```
+//!
+//! Compile project and then drag resulting .a into Xcode project. Add winit.h to xcode.
+//!
+//! ```ignore
+//! void start_winit_app();
+//! ```
+//!
+//! Use start_winit_app inside your xcode's main function.
+//!
+//!
+//! ## App lifecycle and events
+//!
+//! iOS environment is very different from other platforms and you must be very
+//! careful with it's events. Familiarize yourself with
+//! [app lifecycle](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIApplicationDelegate_Protocol/).
+//!
+//! This is how those event are represented in winit:
+//!
+//!  - applicationDidBecomeActive is Resumed
+//!  - applicationWillResignActive is Suspended
+//!  - applicationWillTerminate is LoopExiting
+//!
+//! Keep in mind that after LoopExiting 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.
 
-use icrate::Foundation::MainThreadMarker;
-use objc2::rc::Id;
+use std::os::raw::c_void;
 
 use crate::{
     event_loop::EventLoop,
-    monitor::{MonitorHandle, VideoMode},
-    window::{Window, WindowBuilder},
+    monitor::{MonitorHandle, VideoModeHandle},
+    window::{Window, WindowAttributes},
 };
 
 /// Additional methods on [`EventLoop`] that are specific to iOS.
@@ -88,6 +151,21 @@ pub trait WindowExtIOS {
     /// [`setNeedsStatusBarAppearanceUpdate()`](https://developer.apple.com/documentation/uikit/uiviewcontroller/1621354-setneedsstatusbarappearanceupdat?language=objc)
     /// is also called for you.
     fn set_preferred_status_bar_style(&self, status_bar_style: StatusBarStyle);
+
+    /// Sets whether the [`Window`] should recognize pinch gestures.
+    ///
+    /// The default is to not recognize gestures.
+    fn recognize_pinch_gesture(&self, should_recognize: bool);
+
+    /// Sets whether the [`Window`] should recognize double tap gestures.
+    ///
+    /// The default is to not recognize gestures.
+    fn recognize_doubletap_gesture(&self, should_recognize: bool);
+
+    /// Sets whether the [`Window`] should recognize rotation gestures.
+    ///
+    /// The default is to not recognize gestures.
+    fn recognize_rotation_gesture(&self, should_recognize: bool);
 }
 
 impl WindowExtIOS for Window {
@@ -127,10 +205,28 @@ impl WindowExtIOS for Window {
         self.window
             .maybe_queue_on_main(move |w| w.set_preferred_status_bar_style(status_bar_style))
     }
+
+    #[inline]
+    fn recognize_pinch_gesture(&self, should_recognize: bool) {
+        self.window
+            .maybe_queue_on_main(move |w| w.recognize_pinch_gesture(should_recognize));
+    }
+
+    #[inline]
+    fn recognize_doubletap_gesture(&self, should_recognize: bool) {
+        self.window
+            .maybe_queue_on_main(move |w| w.recognize_doubletap_gesture(should_recognize));
+    }
+
+    #[inline]
+    fn recognize_rotation_gesture(&self, should_recognize: bool) {
+        self.window
+            .maybe_queue_on_main(move |w| w.recognize_rotation_gesture(should_recognize));
+    }
 }
 
-/// Additional methods on [`WindowBuilder`] that are specific to iOS.
-pub trait WindowBuilderExtIOS {
+/// Additional methods on [`WindowAttributes`] that are specific to iOS.
+pub trait WindowAttributesExtIOS {
     /// 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
@@ -184,7 +280,7 @@ pub trait WindowBuilderExtIOS {
     fn with_preferred_status_bar_style(self, status_bar_style: StatusBarStyle) -> Self;
 }
 
-impl WindowBuilderExtIOS for WindowBuilder {
+impl WindowAttributesExtIOS for WindowAttributes {
     #[inline]
     fn with_scale_factor(mut self, scale_factor: f64) -> Self {
         self.platform_specific.scale_factor = Some(scale_factor);
@@ -230,23 +326,23 @@ pub trait MonitorHandleExtIOS {
     /// [`UIScreen`]: https://developer.apple.com/documentation/uikit/uiscreen?language=objc
     fn ui_screen(&self) -> *mut c_void;
 
-    /// Returns the preferred [`VideoMode`] for this monitor.
+    /// Returns the preferred [`VideoModeHandle`] for this monitor.
     ///
     /// This translates to a call to [`-[UIScreen preferredMode]`](https://developer.apple.com/documentation/uikit/uiscreen/1617823-preferredmode?language=objc).
-    fn preferred_video_mode(&self) -> VideoMode;
+    fn preferred_video_mode(&self) -> VideoModeHandle;
 }
 
 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
+        let mtm = unsafe { icrate::Foundation::MainThreadMarker::new_unchecked() };
+        objc2::rc::Id::as_ptr(self.inner.ui_screen(mtm)) as *mut c_void
     }
 
     #[inline]
-    fn preferred_video_mode(&self) -> VideoMode {
-        VideoMode {
+    fn preferred_video_mode(&self) -> VideoModeHandle {
+        VideoModeHandle {
             video_mode: self.inner.preferred_video_mode(),
         }
     }
@@ -283,7 +379,7 @@ pub enum Idiom {
     CarPlay,
 }
 
-bitflags! {
+bitflags::bitflags! {
     /// The [edges] of a screen.
     ///
     /// [edges]: https://developer.apple.com/documentation/uikit/uirectedge?language=objc

src/platform/macos.rs

@@ -1,11 +1,28 @@
+//! # macOS / AppKit
+//!
+//! Winit has an OS requirement of macOS 10.11 or higher (same as Rust
+//! itself), and is regularly tested on macOS 10.14.
+//!
+//! A lot of functionality expects the application to be ready before you
+//! start doing anything; this includes creating windows, fetching monitors,
+//! drawing, and so on, see issues [#2238], [#2051] and [#2087].
+//!
+//! If you encounter problems, you should try doing your initialization inside
+//! `Event::Resumed`.
+//!
+//! [#2238]: https://github.com/rust-windowing/winit/issues/2238
+//! [#2051]: https://github.com/rust-windowing/winit/issues/2051
+//! [#2087]: https://github.com/rust-windowing/winit/issues/2087
+
 use std::os::raw::c_void;
 
-use objc2::rc::Id;
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
 
 use crate::{
-    event_loop::{EventLoopBuilder, EventLoopWindowTarget},
+    event_loop::{ActiveEventLoop, EventLoopBuilder},
     monitor::MonitorHandle,
-    window::{Window, WindowBuilder},
+    window::{Window, WindowAttributes},
 };
 
 /// Additional methods on [`Window`] that are specific to MacOS.
@@ -173,15 +190,15 @@ pub enum ActivationPolicy {
     Prohibited,
 }
 
-/// Additional methods on [`WindowBuilder`] that are specific to MacOS.
+/// Additional methods on [`WindowAttributes`] that are specific to MacOS.
 ///
-/// **Note:** Properties dealing with the titlebar will be overwritten by the [`WindowBuilder::with_decorations`] method:
+/// **Note:** Properties dealing with the titlebar will be overwritten by the [`WindowAttributes::with_decorations`] method:
 /// - `with_titlebar_transparent`
 /// - `with_title_hidden`
 /// - `with_titlebar_hidden`
 /// - `with_titlebar_buttons_hidden`
 /// - `with_fullsize_content_view`
-pub trait WindowBuilderExtMacOS {
+pub trait WindowAttributesExtMacOS {
     /// 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;
     /// Makes the titlebar transparent and allows the content to appear behind it.
@@ -208,7 +225,7 @@ pub trait WindowBuilderExtMacOS {
     fn with_option_as_alt(self, option_as_alt: OptionAsAlt) -> Self;
 }
 
-impl WindowBuilderExtMacOS for WindowBuilder {
+impl WindowAttributesExtMacOS for WindowAttributes {
     #[inline]
     fn with_movable_by_window_background(mut self, movable_by_window_background: bool) -> Self {
         self.platform_specific.movable_by_window_background = movable_by_window_background;
@@ -365,12 +382,16 @@ impl MonitorHandleExtMacOS for MonitorHandle {
     }
 
     fn ns_screen(&self) -> Option<*mut c_void> {
-        self.inner.ns_screen().map(|s| Id::as_ptr(&s) as _)
+        // SAFETY: We only use the marker to get a pointer
+        let mtm = unsafe { icrate::Foundation::MainThreadMarker::new_unchecked() };
+        self.inner
+            .ns_screen(mtm)
+            .map(|s| objc2::rc::Id::as_ptr(&s) as _)
     }
 }
 
-/// Additional methods on [`EventLoopWindowTarget`] that are specific to macOS.
-pub trait EventLoopWindowTargetExtMacOS {
+/// Additional methods on [`ActiveEventLoop`] that are specific to macOS.
+pub trait ActiveEventLoopExtMacOS {
     /// Hide the entire application. In most applications this is typically triggered with Command-H.
     fn hide_application(&self);
     /// Hide the other applications. In most applications this is typically triggered with Command+Option-H.
@@ -383,7 +404,7 @@ pub trait EventLoopWindowTargetExtMacOS {
     fn allows_automatic_window_tabbing(&self) -> bool;
 }
 
-impl<T> EventLoopWindowTargetExtMacOS for EventLoopWindowTarget<T> {
+impl ActiveEventLoopExtMacOS for ActiveEventLoop {
     fn hide_application(&self) {
         self.p.hide_application()
     }

src/platform/mod.rs

@@ -1,38 +1,24 @@
 //! Contains traits with platform-specific methods in them.
 //!
-//! Contains the follow OS-specific modules:
-//!
-//!  - `android`
-//!  - `ios`
-//!  - `macos`
-//!  - `unix`
-//!  - `windows`
-//!  - `web`
-//!
-//! And the following platform-specific modules:
-//!
-//! - `run_on_demand` (available on `windows`, `unix`, `macos`, `android`)
-//! - `pump_events` (available on `windows`, `unix`, `macos`, `android`)
-//!
-//! However only the module corresponding to the platform you're compiling to will be available.
+//! Only the modules corresponding to the platform you're compiling to will be available.
 
-#[cfg(android_platform)]
+#[cfg(any(android_platform, docsrs))]
 pub mod android;
-#[cfg(ios_platform)]
+#[cfg(any(ios_platform, docsrs))]
 pub mod ios;
-#[cfg(macos_platform)]
+#[cfg(any(macos_platform, docsrs))]
 pub mod macos;
-#[cfg(orbital_platform)]
+#[cfg(any(orbital_platform, docsrs))]
 pub mod orbital;
-#[cfg(any(x11_platform, wayland_platform))]
+#[cfg(any(x11_platform, wayland_platform, docsrs))]
 pub mod startup_notify;
-#[cfg(wayland_platform)]
+#[cfg(any(wayland_platform, docsrs))]
 pub mod wayland;
-#[cfg(wasm_platform)]
+#[cfg(any(web_platform, docsrs))]
 pub mod web;
-#[cfg(windows_platform)]
+#[cfg(any(windows_platform, docsrs))]
 pub mod windows;
-#[cfg(x11_platform)]
+#[cfg(any(x11_platform, docsrs))]
 pub mod x11;
 
 #[cfg(any(
@@ -40,7 +26,8 @@ pub mod x11;
     macos_platform,
     android_platform,
     x11_platform,
-    wayland_platform
+    wayland_platform,
+    docsrs,
 ))]
 pub mod run_on_demand;
 
@@ -49,7 +36,8 @@ pub mod run_on_demand;
     macos_platform,
     android_platform,
     x11_platform,
-    wayland_platform
+    wayland_platform,
+    docsrs,
 ))]
 pub mod pump_events;
 
@@ -62,4 +50,12 @@ pub mod pump_events;
     docsrs
 ))]
 pub mod modifier_supplement;
+
+#[cfg(any(
+    windows_platform,
+    macos_platform,
+    x11_platform,
+    wayland_platform,
+    docsrs
+))]
 pub mod scancode;

src/platform/modifier_supplement.rs

@@ -1,5 +1,4 @@
-#![cfg(any(windows_platform, macos_platform, x11_platform, wayland_platform))]
-
+use crate::event::KeyEvent;
 use crate::keyboard::Key;
 
 /// Additional methods for the `KeyEvent` which cannot be implemented on all
@@ -22,3 +21,18 @@ pub trait KeyEventExtModifierSupplement {
     /// cannot be `Dead`.
     fn key_without_modifiers(&self) -> Key;
 }
+
+impl KeyEventExtModifierSupplement for KeyEvent {
+    #[inline]
+    fn text_with_all_modifiers(&self) -> Option<&str> {
+        self.platform_specific
+            .text_with_all_modifiers
+            .as_ref()
+            .map(|s| s.as_str())
+    }
+
+    #[inline]
+    fn key_without_modifiers(&self) -> Key {
+        self.platform_specific.key_without_modifiers.clone()
+    }
+}

src/platform/orbital.rs

@@ -1 +1,6 @@
+//! # Orbital / Redox OS
+//!
+//! Redox OS has some functionality not yet present that will be implemented
+//! when its orbital display server provides it.
+
 // There are no Orbital specific traits yet.

src/platform/pump_events.rs

@@ -1,22 +1,13 @@
 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),
-}
+use crate::application::ApplicationHandler;
+use crate::event::Event;
+use crate::event_loop::{self, ActiveEventLoop, EventLoop};
 
 /// 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;
+    type UserEvent: 'static;
 
     /// Pump the `EventLoop` to check for and dispatch pending events.
     ///
@@ -32,68 +23,6 @@ pub trait EventLoopExtPumpEvents {
     /// 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!
     ///
@@ -137,12 +66,14 @@ pub trait EventLoopExtPumpEvents {
     /// 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
@@ -152,29 +83,45 @@ pub trait EventLoopExtPumpEvents {
     /// 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`
+    /// - **MacOS**: The implementation works in terms of stopping the global application
     ///   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)
+    ///   implementation details for `NSApplication` 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
+    ///   it also means the `NSApplication` 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.
+    ///   because the `NSApplication` 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_app_events<A: ApplicationHandler<Self::UserEvent>>(
+        &mut self,
+        timeout: Option<Duration>,
+        app: &mut A,
+    ) -> PumpStatus {
+        #[allow(deprecated)]
+        self.pump_events(timeout, |event, event_loop| {
+            event_loop::dispatch_event_for_app(app, event_loop, event)
+        })
+    }
+
+    /// See [`pump_app_events`].
+    ///
+    /// [`pump_app_events`]: Self::pump_app_events
+    #[deprecated = "use EventLoopExtPumpEvents::pump_app_events"]
     fn pump_events<F>(&mut self, timeout: Option<Duration>, event_handler: F) -> PumpStatus
     where
-        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>);
+        F: FnMut(Event<Self::UserEvent>, &ActiveEventLoop);
 }
 
 impl<T> EventLoopExtPumpEvents for EventLoop<T> {
@@ -182,8 +129,16 @@ impl<T> EventLoopExtPumpEvents for EventLoop<T> {
 
     fn pump_events<F>(&mut self, timeout: Option<Duration>, event_handler: F) -> PumpStatus
     where
-        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>),
+        F: FnMut(Event<Self::UserEvent>, &ActiveEventLoop),
     {
         self.event_loop.pump_events(timeout, event_handler)
     }
 }
+
+/// The return status for `pump_events`
+pub enum PumpStatus {
+    /// Continue running external loop.
+    Continue,
+    /// Exit external loop.
+    Exit(i32),
+}

src/platform/run_on_demand.rs

@@ -1,8 +1,7 @@
-use crate::{
-    error::EventLoopError,
-    event::Event,
-    event_loop::{EventLoop, EventLoopWindowTarget},
-};
+use crate::application::ApplicationHandler;
+use crate::error::EventLoopError;
+use crate::event::Event;
+use crate::event_loop::{self, ActiveEventLoop, EventLoop};
 
 #[cfg(doc)]
 use crate::{platform::pump_events::EventLoopExtPumpEvents, window::Window};
@@ -10,12 +9,19 @@ 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;
+    type UserEvent: 'static;
 
-    /// Runs the event loop in the calling thread and calls the given `event_handler` closure
-    /// to dispatch any window system events.
+    /// See [`run_app_on_demand`].
     ///
-    /// Unlike [`EventLoop::run`], this function accepts non-`'static` (i.e. non-`move`) closures
+    /// [`run_app_on_demand`]: Self::run_app_on_demand
+    #[deprecated = "use EventLoopExtRunOnDemand::run_app_on_demand"]
+    fn run_on_demand<F>(&mut self, event_handler: F) -> Result<(), EventLoopError>
+    where
+        F: FnMut(Event<Self::UserEvent>, &ActiveEventLoop);
+
+    /// Run the application with the event loop on the calling thread.
+    ///
+    /// Unlike [`EventLoop::run_app`], 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.
@@ -26,11 +32,10 @@ pub trait EventLoopExtRunOnDemand {
     ///
     /// 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)
+    /// you can look at the [`EventLoopExtPumpEvents::pump_app_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.
+    /// Each time `run_app_on_demand` is called the startup sequence of `init`, followed by
+    /// `resume` is being preserved.
     ///
     /// See the [`set_control_flow()`] docs on how to change the event loop's behavior.
     ///
@@ -40,8 +45,8 @@ pub trait EventLoopExtRunOnDemand {
     ///   backend it is possible to use `EventLoopExtWebSys::spawn()`[^1] 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
+    /// You are strongly encouraged to use [`EventLoop::run_app()`] for portability, unless you
+    /// specifically need the ability to re-run a single event loop more than once
     ///
     /// # Supported Platforms
     /// - Windows
@@ -55,18 +60,24 @@ pub trait EventLoopExtRunOnDemand {
     ///   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.
+    /// - **iOS:** It's not possible to stop and start an `UIApplication` repeatedly on iOS.
     ///
     #[cfg_attr(
-        not(wasm_platform),
+        not(web_platform),
         doc = "[^1]: `spawn()` is only available on `wasm` platforms."
     )]
     ///
-    /// [`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>);
+    /// [`exit()`]: ActiveEventLoop::exit()
+    /// [`set_control_flow()`]: ActiveEventLoop::set_control_flow()
+    fn run_app_on_demand<A: ApplicationHandler<Self::UserEvent>>(
+        &mut self,
+        app: &mut A,
+    ) -> Result<(), EventLoopError> {
+        #[allow(deprecated)]
+        self.run_on_demand(|event, event_loop| {
+            event_loop::dispatch_event_for_app(app, event_loop, event)
+        })
+    }
 }
 
 impl<T> EventLoopExtRunOnDemand for EventLoop<T> {
@@ -74,16 +85,29 @@ impl<T> EventLoopExtRunOnDemand for EventLoop<T> {
 
     fn run_on_demand<F>(&mut self, event_handler: F) -> Result<(), EventLoopError>
     where
-        F: FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>),
+        F: FnMut(Event<Self::UserEvent>, &ActiveEventLoop),
     {
         self.event_loop.window_target().clear_exit();
         self.event_loop.run_on_demand(event_handler)
     }
 }
 
-impl<T> EventLoopWindowTarget<T> {
+impl ActiveEventLoop {
     /// Clear exit status.
     pub(crate) fn clear_exit(&self) {
         self.p.clear_exit()
     }
 }
+
+/// ```compile_fail
+/// use winit::event_loop::EventLoop;
+/// use winit::platform::run_on_demand::EventLoopExtRunOnDemand;
+///
+/// let mut event_loop = EventLoop::new().unwrap();
+/// event_loop.run_on_demand(|_, _| {
+///     // Attempt to run the event loop re-entrantly; this must fail.
+///     event_loop.run_on_demand(|_, _| {});
+/// });
+/// ```
+#[allow(dead_code)]
+fn test_run_on_demand_cannot_access_event_loop() {}

src/platform/scancode.rs

@@ -1,5 +1,3 @@
-#![cfg(any(windows_platform, macos_platform, x11_platform, wayland_platform))]
-
 use crate::keyboard::{KeyCode, PhysicalKey};
 
 // TODO: Describe what this value contains for each platform
@@ -11,7 +9,7 @@ use crate::keyboard::{KeyCode, PhysicalKey};
 pub trait PhysicalKeyExtScancode {
     /// The raw value of the platform-specific physical key identifier.
     ///
-    /// Returns `Some(key_id)` if the conversion was succesful; returns `None` otherwise.
+    /// Returns `Some(key_id)` if the conversion was successful; returns `None` otherwise.
     ///
     /// ## Platform-specific
     /// - **Windows:** A 16bit extended scancode
@@ -29,17 +27,24 @@ pub trait PhysicalKeyExtScancode {
     fn from_scancode(scancode: u32) -> PhysicalKey;
 }
 
-impl PhysicalKeyExtScancode for KeyCode
-where
-    PhysicalKey: PhysicalKeyExtScancode,
-{
-    #[inline]
-    fn from_scancode(scancode: u32) -> PhysicalKey {
-        <PhysicalKey as PhysicalKeyExtScancode>::from_scancode(scancode)
+impl PhysicalKeyExtScancode for PhysicalKey {
+    fn to_scancode(self) -> Option<u32> {
+        crate::platform_impl::physicalkey_to_scancode(self)
     }
 
+    fn from_scancode(scancode: u32) -> PhysicalKey {
+        crate::platform_impl::scancode_to_physicalkey(scancode)
+    }
+}
+
+impl PhysicalKeyExtScancode for KeyCode {
     #[inline]
     fn to_scancode(self) -> Option<u32> {
         <PhysicalKey as PhysicalKeyExtScancode>::to_scancode(PhysicalKey::Code(self))
     }
+
+    #[inline]
+    fn from_scancode(scancode: u32) -> PhysicalKey {
+        <PhysicalKey as PhysicalKeyExtScancode>::from_scancode(scancode)
+    }
 }

src/platform/startup_notify.rs

@@ -24,8 +24,8 @@
 use std::env;
 
 use crate::error::NotSupportedError;
-use crate::event_loop::{AsyncRequestSerial, EventLoopWindowTarget};
-use crate::window::{ActivationToken, Window, WindowBuilder};
+use crate::event_loop::{ActiveEventLoop, AsyncRequestSerial};
+use crate::window::{ActivationToken, Window, WindowAttributes};
 
 /// The variable which is used mostly on X11.
 const X11_VAR: &str = "DESKTOP_STARTUP_ID";
@@ -47,7 +47,7 @@ pub trait WindowExtStartupNotify {
     fn request_activation_token(&self) -> Result<AsyncRequestSerial, NotSupportedError>;
 }
 
-pub trait WindowBuilderExtStartupNotify {
+pub trait WindowAttributesExtStartupNotify {
     /// Use this [`ActivationToken`] during window creation.
     ///
     /// Not using such a token upon a window could make your window not gaining
@@ -55,13 +55,13 @@ pub trait WindowBuilderExtStartupNotify {
     fn with_activation_token(self, token: ActivationToken) -> Self;
 }
 
-impl<T> EventLoopExtStartupNotify for EventLoopWindowTarget<T> {
+impl EventLoopExtStartupNotify for ActiveEventLoop {
     fn read_token_from_env(&self) -> Option<ActivationToken> {
         match self.p {
             #[cfg(wayland_platform)]
-            crate::platform_impl::EventLoopWindowTarget::Wayland(_) => env::var(WAYLAND_VAR),
+            crate::platform_impl::ActiveEventLoop::Wayland(_) => env::var(WAYLAND_VAR),
             #[cfg(x11_platform)]
-            crate::platform_impl::EventLoopWindowTarget::X(_) => env::var(X11_VAR),
+            crate::platform_impl::ActiveEventLoop::X(_) => env::var(X11_VAR),
         }
         .ok()
         .map(ActivationToken::_new)
@@ -74,7 +74,7 @@ impl WindowExtStartupNotify for Window {
     }
 }
 
-impl WindowBuilderExtStartupNotify for WindowBuilder {
+impl WindowAttributesExtStartupNotify for WindowAttributes {
     fn with_activation_token(mut self, token: ActivationToken) -> Self {
         self.platform_specific.activation_token = Some(token);
         self

src/platform/wayland.rs

@@ -1,20 +1,33 @@
+//! # Wayland
+//!
+//! **Note:** Windows don't appear on Wayland until you draw/present to them.
+//!
+//! By default, Winit loads system libraries using `dlopen`. This can be
+//! disabled by disabling the `"wayland-dlopen"` cargo feature.
+//!
+//! ## Client-side decorations
+//!
+//! Winit provides client-side decorations by default, but the behaviour can
+//! be controlled with the following feature flags:
+//!
+//! * `wayland-csd-adwaita` (default).
+//! * `wayland-csd-adwaita-crossfont`.
+//! * `wayland-csd-adwaita-notitle`.
 use crate::{
-    event_loop::{EventLoopBuilder, EventLoopWindowTarget},
+    event_loop::{ActiveEventLoop, EventLoopBuilder},
     monitor::MonitorHandle,
-    window::{Window, WindowBuilder},
+    window::{Window, WindowAttributes},
 };
 
-use crate::platform_impl::{ApplicationName, Backend};
-
 pub use crate::window::Theme;
 
-/// Additional methods on [`EventLoopWindowTarget`] that are specific to Wayland.
-pub trait EventLoopWindowTargetExtWayland {
-    /// True if the [`EventLoopWindowTarget`] uses Wayland.
+/// Additional methods on [`ActiveEventLoop`] that are specific to Wayland.
+pub trait ActiveEventLoopExtWayland {
+    /// True if the [`ActiveEventLoop`] uses Wayland.
     fn is_wayland(&self) -> bool;
 }
 
-impl<T> EventLoopWindowTargetExtWayland for EventLoopWindowTarget<T> {
+impl ActiveEventLoopExtWayland for ActiveEventLoop {
     #[inline]
     fn is_wayland(&self) -> bool {
         self.p.is_wayland()
@@ -36,7 +49,7 @@ pub trait EventLoopBuilderExtWayland {
 impl<T> EventLoopBuilderExtWayland for EventLoopBuilder<T> {
     #[inline]
     fn with_wayland(&mut self) -> &mut Self {
-        self.platform_specific.forced_backend = Some(Backend::Wayland);
+        self.platform_specific.forced_backend = Some(crate::platform_impl::Backend::Wayland);
         self
     }
 
@@ -52,22 +65,25 @@ pub trait WindowExtWayland {}
 
 impl WindowExtWayland for Window {}
 
-/// Additional methods on [`WindowBuilder`] that are specific to Wayland.
-pub trait WindowBuilderExtWayland {
+/// Additional methods on [`WindowAttributes`] that are specific to Wayland.
+pub trait WindowAttributesExtWayland {
     /// Build window with the given name.
     ///
     /// The `general` name sets an application ID, which should match the `.desktop`
-    /// file destributed with your program. The `instance` is a `no-op`.
+    /// file distributed with your program. The `instance` is a `no-op`.
     ///
     /// For details about application ID conventions, see the
     /// [Desktop Entry Spec](https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#desktop-file-id)
     fn with_name(self, general: impl Into<String>, instance: impl Into<String>) -> Self;
 }
 
-impl WindowBuilderExtWayland for WindowBuilder {
+impl WindowAttributesExtWayland for WindowAttributes {
     #[inline]
     fn with_name(mut self, general: impl Into<String>, instance: impl Into<String>) -> Self {
-        self.platform_specific.name = Some(ApplicationName::new(general.into(), instance.into()));
+        self.platform_specific.name = Some(crate::platform_impl::ApplicationName::new(
+            general.into(),
+            instance.into(),
+        ));
         self
     }
 }

src/platform/web.rs

@@ -1,12 +1,31 @@
-//! The web target does not automatically insert the canvas element object into the web page, to
-//! 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.
+//! # Web
+//!
+//! The officially supported browsers are Chrome, Firefox and Safari 13.1+,
+//! though forks of these should work fine.
+//!
+//! Winit supports compiling to the `wasm32-unknown-unknown` target with
+//! `web-sys`.
+//!
+//! On the web platform, a Winit window is backed by a `<canvas>` element. You
+//! can either [provide Winit with a `<canvas>` element][with_canvas], or
+//! [let Winit create a `<canvas>` element which you can then retrieve][get]
+//! and insert it into the DOM yourself.
+//!
+//! Currently, there is no example code using Winit on Web, see [#3473]. For
+//! information on using Rust on WebAssembly, check out the [Rust and
+//! WebAssembly book].
+//!
+//! [with_canvas]: WindowAttributesExtWebSys::with_canvas
+//! [get]: WindowExtWebSys::canvas
+//! [#3473]: https://github.com/rust-windowing/winit/issues/3473
+//! [Rust and WebAssembly book]: https://rustwasm.github.io/book/
+//!
+//! ## CSS properties
 //!
 //! It is recommended **not** to apply certain CSS properties to the canvas:
-//! - [`transform`]
-//! - [`border`]
-//! - [`padding`]
+//! - [`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)
 //!
 //! The following APIs can't take them into account and will therefore provide inaccurate results:
 //! - [`WindowEvent::Resized`] and [`Window::(set_)inner_size()`]
@@ -16,28 +35,56 @@
 //! - [`Window::set_outer_position()`]
 //!
 //! [`WindowEvent::Resized`]: crate::event::WindowEvent::Resized
-//! [`Window::(set_)inner_size()`]: crate::window::Window::inner_size()
+//! [`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
+//! [`Window::set_outer_position()`]: crate::window::Window::set_outer_position
 
-use crate::event::Event;
-use crate::event_loop::EventLoop;
-use crate::event_loop::EventLoopWindowTarget;
-use crate::window::{Window, WindowBuilder};
-use crate::SendSyncWrapper;
+use std::error::Error;
+use std::fmt::{self, Display, Formatter};
+use std::future::Future;
+use std::pin::Pin;
+use std::task::{Context, Poll};
+use std::time::Duration;
 
+#[cfg(web_platform)]
 use web_sys::HtmlCanvasElement;
 
+use crate::application::ApplicationHandler;
+use crate::cursor::CustomCursorSource;
+use crate::event::Event;
+use crate::event_loop::{self, ActiveEventLoop, EventLoop};
+#[cfg(web_platform)]
+use crate::platform_impl::CustomCursorFuture as PlatformCustomCursorFuture;
+use crate::platform_impl::PlatformCustomCursorSource;
+use crate::window::{CustomCursor, Window, WindowAttributes};
+
+#[cfg(not(web_platform))]
+#[doc(hidden)]
+pub struct HtmlCanvasElement;
+
 pub trait WindowExtWebSys {
-    /// Only returns the canvas if called from inside the window.
+    /// Only returns the canvas if called from inside the window context (the
+    /// main thread).
     fn canvas(&self) -> Option<HtmlCanvasElement>;
+
+    /// Returns [`true`] if calling `event.preventDefault()` is enabled.
+    ///
+    /// See [`Window::set_prevent_default()`] for more details.
+    fn prevent_default(&self) -> bool;
+
+    /// Sets whether `event.preventDefault()` should be called on events on the
+    /// canvas that have side effects.
+    ///
+    /// For example, by default using the mouse wheel would cause the page to scroll, enabling this
+    /// would prevent that.
+    ///
+    /// Some events are impossible to prevent. E.g. Firefox allows to access the native browser
+    /// context menu with Shift+Rightclick.
+    fn set_prevent_default(&self, prevent_default: bool);
 }
 
 impl WindowExtWebSys for Window {
@@ -45,25 +92,34 @@ impl WindowExtWebSys for Window {
     fn canvas(&self) -> Option<HtmlCanvasElement> {
         self.window.canvas()
     }
+
+    fn prevent_default(&self) -> bool {
+        self.window.prevent_default()
+    }
+
+    fn set_prevent_default(&self, prevent_default: bool) {
+        self.window.set_prevent_default(prevent_default)
+    }
 }
 
-pub trait WindowBuilderExtWebSys {
+pub trait WindowAttributesExtWebSys {
     /// Pass an [`HtmlCanvasElement`] to be used for this [`Window`]. If [`None`],
-    /// [`WindowBuilder::build()`] will create one.
+    /// [`WindowAttributes::default()`] will create one.
     ///
     /// In any case, the canvas won't be automatically inserted into the web page.
     ///
     /// [`None`] by default.
+    #[cfg_attr(
+        not(web_platform),
+        doc = "",
+        doc = "[`HtmlCanvasElement`]: #only-available-on-wasm"
+    )]
     fn with_canvas(self, canvas: Option<HtmlCanvasElement>) -> Self;
 
-    /// Whether `event.preventDefault` should be automatically called to prevent event propagation
-    /// when appropriate.
+    /// Sets whether `event.preventDefault()` should be called on events on the
+    /// canvas that have side effects.
     ///
-    /// For example, mouse wheel events are only handled by the canvas by default. This avoids
-    /// the default behavior of scrolling the page.
-    ///
-    /// Some events are impossible to prevent. E.g. Firefox allows to access the native browser
-    /// context menu with Shift+Rightclick.
+    /// See [`Window::set_prevent_default()`] for more details.
     ///
     /// Enabled by default.
     fn with_prevent_default(self, prevent_default: bool) -> Self;
@@ -80,9 +136,9 @@ pub trait WindowBuilderExtWebSys {
     fn with_append(self, append: bool) -> Self;
 }
 
-impl WindowBuilderExtWebSys for WindowBuilder {
+impl WindowAttributesExtWebSys for WindowAttributes {
     fn with_canvas(mut self, canvas: Option<HtmlCanvasElement>) -> Self {
-        self.platform_specific.canvas = SendSyncWrapper(canvas);
+        self.platform_specific.set_canvas(canvas);
         self
     }
 
@@ -105,18 +161,18 @@ impl WindowBuilderExtWebSys for WindowBuilder {
 /// Additional methods on `EventLoop` that are specific to the web.
 pub trait EventLoopExtWebSys {
     /// A type provided by the user that can be passed through `Event::UserEvent`.
-    type UserEvent;
+    type UserEvent: 'static;
 
     /// Initializes the winit event loop.
     ///
     /// Unlike
     #[cfg_attr(
-        all(wasm_platform, target_feature = "exception-handling"),
-        doc = "`run()`"
+        all(web_platform, target_feature = "exception-handling"),
+        doc = "`run_app()`"
     )]
     #[cfg_attr(
-        not(all(wasm_platform, target_feature = "exception-handling")),
-        doc = "[`run()`]"
+        not(all(web_platform, target_feature = "exception-handling")),
+        doc = "[`run_app()`]"
     )]
     /// [^1], this returns immediately, and doesn't throw an exception in order to
     /// satisfy its [`!`] return type.
@@ -127,27 +183,39 @@ pub trait EventLoopExtWebSys {
     /// event loop when switching between tabs on a single page application.
     ///
     #[cfg_attr(
-        not(all(wasm_platform, target_feature = "exception-handling")),
-        doc = "[`run()`]: EventLoop::run()"
+        not(all(web_platform, target_feature = "exception-handling")),
+        doc = "[`run_app()`]: EventLoop::run_app()"
     )]
-    /// [^1]: `run()` is _not_ available on WASM when the target supports `exception-handling`.
+    /// [^1]: `run_app()` is _not_ available on WASM when the target supports `exception-handling`.
+    fn spawn_app<A: ApplicationHandler<Self::UserEvent> + 'static>(self, app: A);
+
+    /// See [`spawn_app`].
+    ///
+    /// [`spawn_app`]: Self::spawn_app
+    #[deprecated = "use EventLoopExtWebSys::spawn_app"]
     fn spawn<F>(self, event_handler: F)
     where
-        F: 'static + FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>);
+        F: 'static + FnMut(Event<Self::UserEvent>, &ActiveEventLoop);
 }
 
 impl<T> EventLoopExtWebSys for EventLoop<T> {
     type UserEvent = T;
 
+    fn spawn_app<A: ApplicationHandler<Self::UserEvent> + 'static>(self, mut app: A) {
+        self.event_loop.spawn(move |event, event_loop| {
+            event_loop::dispatch_event_for_app(&mut app, event_loop, event)
+        });
+    }
+
     fn spawn<F>(self, event_handler: F)
     where
-        F: 'static + FnMut(Event<Self::UserEvent>, &EventLoopWindowTarget<Self::UserEvent>),
+        F: 'static + FnMut(Event<Self::UserEvent>, &ActiveEventLoop),
     {
         self.event_loop.spawn(event_handler)
     }
 }
 
-pub trait EventLoopWindowTargetExtWebSys {
+pub trait ActiveEventLoopExtWebSys {
     /// Sets the strategy for [`ControlFlow::Poll`].
     ///
     /// See [`PollStrategy`].
@@ -161,9 +229,18 @@ pub trait EventLoopWindowTargetExtWebSys {
     ///
     /// [`ControlFlow::Poll`]: crate::event_loop::ControlFlow::Poll
     fn poll_strategy(&self) -> PollStrategy;
+
+    /// Async version of [`ActiveEventLoop::create_custom_cursor()`] which waits until the
+    /// cursor has completely finished loading.
+    fn create_custom_cursor_async(&self, source: CustomCursorSource) -> CustomCursorFuture;
 }
 
-impl<T> EventLoopWindowTargetExtWebSys for EventLoopWindowTarget<T> {
+impl ActiveEventLoopExtWebSys for ActiveEventLoop {
+    #[inline]
+    fn create_custom_cursor_async(&self, source: CustomCursorSource) -> CustomCursorFuture {
+        self.p.create_custom_cursor_async(source)
+    }
+
     #[inline]
     fn set_poll_strategy(&self, strategy: PollStrategy) {
         self.p.set_poll_strategy(strategy);
@@ -200,3 +277,111 @@ pub enum PollStrategy {
     #[default]
     Scheduler,
 }
+
+pub trait CustomCursorExtWebSys {
+    /// Returns if this cursor is an animation.
+    fn is_animation(&self) -> bool;
+
+    /// Creates a new cursor from a URL pointing to an image.
+    /// It uses the [url css function](https://developer.mozilla.org/en-US/docs/Web/CSS/url),
+    /// but browser support for image formats is inconsistent. Using [PNG] is recommended.
+    ///
+    /// [PNG]: https://en.wikipedia.org/wiki/PNG
+    fn from_url(url: String, hotspot_x: u16, hotspot_y: u16) -> CustomCursorSource;
+
+    /// Crates a new animated cursor from multiple [`CustomCursor`]s.
+    /// Supplied `cursors` can't be empty or other animations.
+    fn from_animation(
+        duration: Duration,
+        cursors: Vec<CustomCursor>,
+    ) -> Result<CustomCursorSource, BadAnimation>;
+}
+
+impl CustomCursorExtWebSys for CustomCursor {
+    fn is_animation(&self) -> bool {
+        self.inner.animation
+    }
+
+    fn from_url(url: String, hotspot_x: u16, hotspot_y: u16) -> CustomCursorSource {
+        CustomCursorSource {
+            inner: PlatformCustomCursorSource::Url {
+                url,
+                hotspot_x,
+                hotspot_y,
+            },
+        }
+    }
+
+    fn from_animation(
+        duration: Duration,
+        cursors: Vec<CustomCursor>,
+    ) -> Result<CustomCursorSource, BadAnimation> {
+        if cursors.is_empty() {
+            return Err(BadAnimation::Empty);
+        }
+
+        if cursors.iter().any(CustomCursor::is_animation) {
+            return Err(BadAnimation::Animation);
+        }
+
+        Ok(CustomCursorSource {
+            inner: PlatformCustomCursorSource::Animation { duration, cursors },
+        })
+    }
+}
+
+/// An error produced when using [`CustomCursor::from_animation`] with invalid arguments.
+#[derive(Debug, Clone)]
+pub enum BadAnimation {
+    /// Produced when no cursors were supplied.
+    Empty,
+    /// Produced when a supplied cursor is an animation.
+    Animation,
+}
+
+impl fmt::Display for BadAnimation {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Empty => write!(f, "No cursors supplied"),
+            Self::Animation => write!(f, "A supplied cursor is an animtion"),
+        }
+    }
+}
+
+impl Error for BadAnimation {}
+
+#[cfg(not(web_platform))]
+struct PlatformCustomCursorFuture;
+
+#[derive(Debug)]
+pub struct CustomCursorFuture(pub(crate) PlatformCustomCursorFuture);
+
+impl Future for CustomCursorFuture {
+    type Output = Result<CustomCursor, CustomCursorError>;
+
+    fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
+        Pin::new(&mut self.0)
+            .poll(cx)
+            .map_ok(|cursor| CustomCursor { inner: cursor })
+    }
+}
+
+#[derive(Clone, Debug)]
+pub enum CustomCursorError {
+    Blob,
+    Decode(String),
+    Animation,
+}
+
+impl Display for CustomCursorError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Blob => write!(f, "failed to create `Blob`"),
+            Self::Decode(error) => write!(f, "failed to decode image: {error}"),
+            Self::Animation => write!(
+                f,
+                "found `CustomCursor` that is an animation when building an animation"
+            ),
+        }
+    }
+}

src/platform/windows.rs

@@ -1,14 +1,15 @@
+//! # Windows
+//!
+//! The supported OS version is Windows 7 or higher, though Windows 10 is
+//! tested regularly.
 use std::{ffi::c_void, path::Path};
 
 use crate::{
     dpi::PhysicalSize,
-    event::{DeviceId, KeyEvent},
+    event::DeviceId,
     event_loop::EventLoopBuilder,
-    keyboard::Key,
     monitor::MonitorHandle,
-    platform::modifier_supplement::KeyEventExtModifierSupplement,
-    platform_impl::WinIcon,
-    window::{BadIcon, Icon, Window, WindowBuilder},
+    window::{BadIcon, Icon, Window, WindowAttributes},
 };
 
 /// Window Handle type used by Win32 API
@@ -18,6 +19,92 @@ pub type HMENU = isize;
 /// Monitor Handle type used by Win32 API
 pub type HMONITOR = isize;
 
+/// Describes a system-drawn backdrop material of a window.
+///
+/// For a detailed explanation, see [`DWM_SYSTEMBACKDROP_TYPE docs`].
+///
+/// [`DWM_SYSTEMBACKDROP_TYPE docs`]: https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_systembackdrop_type
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum BackdropType {
+    /// Corresponds to `DWMSBT_AUTO`.
+    ///
+    /// Usually draws a default backdrop effect on the title bar.
+    #[default]
+    Auto = 0,
+
+    /// Corresponds to `DWMSBT_NONE`.
+    None = 1,
+
+    /// Corresponds to `DWMSBT_MAINWINDOW`.
+    ///
+    /// Draws the Mica backdrop material.
+    MainWindow = 2,
+
+    /// Corresponds to `DWMSBT_TRANSIENTWINDOW`.
+    ///
+    /// Draws the Background Acrylic backdrop material.
+    TransientWindow = 3,
+
+    /// Corresponds to `DWMSBT_TABBEDWINDOW`.
+    ///
+    /// Draws the Alt Mica backdrop material.
+    TabbedWindow = 4,
+}
+
+/// Describes a color used by Windows
+#[repr(transparent)]
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Hash)]
+pub struct Color(u32);
+
+impl Color {
+    /// Use the system's default color
+    pub const SYSTEM_DEFAULT: Color = Color(0xFFFFFFFF);
+
+    //Special constant only valid for the window border and therefore modeled using Option<Color> for user facing code
+    const NONE: Color = Color(0xFFFFFFFE);
+
+    /// Create a new color from the given RGB values
+    pub const fn from_rgb(r: u8, g: u8, b: u8) -> Self {
+        Self((r as u32) | ((g as u32) << 8) | ((b as u32) << 16))
+    }
+}
+
+impl Default for Color {
+    fn default() -> Self {
+        Self::SYSTEM_DEFAULT
+    }
+}
+
+/// Describes how the corners of a window should look like.
+///
+/// For a detailed explanation, see [`DWM_WINDOW_CORNER_PREFERENCE docs`].
+///
+/// [`DWM_WINDOW_CORNER_PREFERENCE docs`]: https://learn.microsoft.com/en-us/windows/win32/api/dwmapi/ne-dwmapi-dwm_window_corner_preference
+#[repr(i32)]
+#[derive(Debug, Default, Clone, Copy, PartialEq, Eq, Hash)]
+pub enum CornerPreference {
+    /// Corresponds to `DWMWCP_DEFAULT`.
+    ///
+    /// Let the system decide when to round window corners.
+    #[default]
+    Default = 0,
+
+    /// Corresponds to `DWMWCP_DONOTROUND`.
+    ///
+    /// Never round window corners.
+    DoNotRound = 1,
+
+    /// Corresponds to `DWMWCP_ROUND`.
+    ///
+    /// Round the corners, if appropriate.
+    Round = 2,
+
+    /// Corresponds to `DWMWCP_ROUNDSMALL`.
+    ///
+    /// Round the corners if appropriate, with a small radius.
+    RoundSmall = 3,
+}
+
 /// Additional methods on `EventLoop` that are specific to Windows.
 pub trait EventLoopBuilderExtWindows {
     /// Whether to allow the event loop to be created off of the main thread.
@@ -115,7 +202,7 @@ pub trait WindowExtWindows {
     ///
     /// A window must be enabled before it can be activated.
     /// If an application has create a modal dialog box by disabling its owner window
-    /// (as described in [`WindowBuilderExtWindows::with_owner_window`]), the application must enable
+    /// (as described in [`WindowAttributesExtWindows::with_owner_window`]), the application must enable
     /// the owner window before destroying the dialog box.
     /// Otherwise, another window will receive the keyboard focus and be activated.
     ///
@@ -136,6 +223,31 @@ pub trait WindowExtWindows {
     ///
     /// Enabling the shadow causes a thin 1px line to appear on the top of the window.
     fn set_undecorated_shadow(&self, shadow: bool);
+
+    /// Sets system-drawn backdrop type.
+    ///
+    /// Requires Windows 11 build 22523+.
+    fn set_system_backdrop(&self, backdrop_type: BackdropType);
+
+    /// Sets the color of the window border.
+    ///
+    /// Supported starting with Windows 11 Build 22000.
+    fn set_border_color(&self, color: Option<Color>);
+
+    /// Sets the background color of the title bar.
+    ///
+    /// Supported starting with Windows 11 Build 22000.
+    fn set_title_background_color(&self, color: Option<Color>);
+
+    /// Sets the color of the window title.
+    ///
+    /// Supported starting with Windows 11 Build 22000.
+    fn set_title_text_color(&self, color: Color);
+
+    /// Sets the preferred style of the window corners.
+    ///
+    /// Supported starting with Windows 11 Build 22000.
+    fn set_corner_preference(&self, preference: CornerPreference);
 }
 
 impl WindowExtWindows for Window {
@@ -158,13 +270,41 @@ impl WindowExtWindows for Window {
     fn set_undecorated_shadow(&self, shadow: bool) {
         self.window.set_undecorated_shadow(shadow)
     }
+
+    #[inline]
+    fn set_system_backdrop(&self, backdrop_type: BackdropType) {
+        self.window.set_system_backdrop(backdrop_type)
+    }
+
+    #[inline]
+    fn set_border_color(&self, color: Option<Color>) {
+        self.window.set_border_color(color.unwrap_or(Color::NONE))
+    }
+
+    #[inline]
+    fn set_title_background_color(&self, color: Option<Color>) {
+        // The windows docs don't mention NONE as a valid options but it works in practice and is useful
+        // to circumvent the Windows option "Show accent color on title bars and window borders"
+        self.window
+            .set_title_background_color(color.unwrap_or(Color::NONE))
+    }
+
+    #[inline]
+    fn set_title_text_color(&self, color: Color) {
+        self.window.set_title_text_color(color)
+    }
+
+    #[inline]
+    fn set_corner_preference(&self, preference: CornerPreference) {
+        self.window.set_corner_preference(preference)
+    }
 }
 
-/// Additional methods on `WindowBuilder` that are specific to Windows.
+/// Additional methods on `WindowAttributes` that are specific to Windows.
 #[allow(rustdoc::broken_intra_doc_links)]
-pub trait WindowBuilderExtWindows {
+pub trait WindowAttributesExtWindows {
     /// 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`.
+    /// This only works when [`WindowAttributes::with_parent_window`] isn't called or set to `None`.
     /// Can be used in combination with [`WindowExtWindows::set_enable(false)`](WindowExtWindows::set_enable)
     /// on the owner window to create a modal dialog box.
     ///
@@ -185,7 +325,14 @@ pub trait WindowBuilderExtWindows {
     /// Note: Dark mode cannot be supported for win32 menus, it's simply not possible to change how the menus look.
     /// 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
+    #[cfg_attr(
+        platform_windows,
+        doc = "[`CreateMenu`]: windows_sys::Win32::UI::WindowsAndMessaging::CreateMenu"
+    )]
+    #[cfg_attr(
+        not(platform_windows),
+        doc = "[`CreateMenu`]: #only-available-on-windows"
+    )]
     fn with_menu(self, menu: HMENU) -> Self;
 
     /// This sets `ICON_BIG`. A good ceiling here is 256x256.
@@ -213,9 +360,37 @@ pub trait WindowBuilderExtWindows {
     /// 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;
+
+    /// Sets system-drawn backdrop type.
+    ///
+    /// Requires Windows 11 build 22523+.
+    fn with_system_backdrop(self, backdrop_type: BackdropType) -> Self;
+
+    /// This sets or removes `WS_CLIPCHILDREN` style.
+    fn with_clip_children(self, flag: bool) -> Self;
+
+    /// Sets the color of the window border.
+    ///
+    /// Supported starting with Windows 11 Build 22000.
+    fn with_border_color(self, color: Option<Color>) -> Self;
+
+    /// Sets the background color of the title bar.
+    ///
+    /// Supported starting with Windows 11 Build 22000.
+    fn with_title_background_color(self, color: Option<Color>) -> Self;
+
+    /// Sets the color of the window title.
+    ///
+    /// Supported starting with Windows 11 Build 22000.
+    fn with_title_text_color(self, color: Color) -> Self;
+
+    /// Sets the preferred style of the window corners.
+    ///
+    /// Supported starting with Windows 11 Build 22000.
+    fn with_corner_preference(self, corners: CornerPreference) -> Self;
 }
 
-impl WindowBuilderExtWindows for WindowBuilder {
+impl WindowAttributesExtWindows for WindowAttributes {
     #[inline]
     fn with_owner_window(mut self, parent: HWND) -> Self {
         self.platform_specific.owner = Some(parent);
@@ -263,6 +438,42 @@ impl WindowBuilderExtWindows for WindowBuilder {
         self.platform_specific.decoration_shadow = shadow;
         self
     }
+
+    #[inline]
+    fn with_system_backdrop(mut self, backdrop_type: BackdropType) -> Self {
+        self.platform_specific.backdrop_type = backdrop_type;
+        self
+    }
+
+    #[inline]
+    fn with_clip_children(mut self, flag: bool) -> Self {
+        self.platform_specific.clip_children = flag;
+        self
+    }
+
+    #[inline]
+    fn with_border_color(mut self, color: Option<Color>) -> Self {
+        self.platform_specific.border_color = Some(color.unwrap_or(Color::NONE));
+        self
+    }
+
+    #[inline]
+    fn with_title_background_color(mut self, color: Option<Color>) -> Self {
+        self.platform_specific.title_background_color = Some(color.unwrap_or(Color::NONE));
+        self
+    }
+
+    #[inline]
+    fn with_title_text_color(mut self, color: Color) -> Self {
+        self.platform_specific.title_text_color = Some(color);
+        self
+    }
+
+    #[inline]
+    fn with_corner_preference(mut self, corners: CornerPreference) -> Self {
+        self.platform_specific.corner_preference = Some(corners);
+        self
+    }
 }
 
 /// Additional methods on `MonitorHandle` that are specific to Windows.
@@ -328,27 +539,12 @@ impl IconExtWindows for Icon {
         path: P,
         size: Option<PhysicalSize<u32>>,
     ) -> Result<Self, BadIcon> {
-        let win_icon = WinIcon::from_path(path, size)?;
+        let win_icon = crate::platform_impl::WinIcon::from_path(path, size)?;
         Ok(Icon { inner: win_icon })
     }
 
     fn from_resource(ordinal: u16, size: Option<PhysicalSize<u32>>) -> Result<Self, BadIcon> {
-        let win_icon = WinIcon::from_resource(ordinal, size)?;
+        let win_icon = crate::platform_impl::WinIcon::from_resource(ordinal, size)?;
         Ok(Icon { inner: win_icon })
     }
 }
-
-impl KeyEventExtModifierSupplement for KeyEvent {
-    #[inline]
-    fn text_with_all_modifiers(&self) -> Option<&str> {
-        self.platform_specific
-            .text_with_all_modifers
-            .as_ref()
-            .map(|s| s.as_str())
-    }
-
-    #[inline]
-    fn key_without_modifiers(&self) -> Key {
-        self.platform_specific.key_without_modifiers.clone()
-    }
-}

src/platform/x11.rs

@@ -1,13 +1,58 @@
+//! # X11
+#[cfg(feature = "serde")]
+use serde::{Deserialize, Serialize};
+
 use crate::{
-    event_loop::{EventLoopBuilder, EventLoopWindowTarget},
+    event_loop::{ActiveEventLoop, EventLoopBuilder},
     monitor::MonitorHandle,
-    window::{Window, WindowBuilder},
+    window::{Window, WindowAttributes},
 };
 
 use crate::dpi::Size;
-use crate::platform_impl::{ApplicationName, Backend, XLIB_ERROR_HOOKS};
 
-pub use crate::platform_impl::{x11::util::WindowType as XWindowType, XNotSupported};
+/// X window type. Maps directly to
+/// [`_NET_WM_WINDOW_TYPE`](https://specifications.freedesktop.org/wm-spec/wm-spec-1.5.html).
+#[derive(Debug, Default, Copy, Clone, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+pub enum WindowType {
+    /// A desktop feature. This can include a single window containing desktop icons with the same dimensions as the
+    /// screen, allowing the desktop environment to have full control of the desktop, without the need for proxying
+    /// root window clicks.
+    Desktop,
+    /// A dock or panel feature. Typically a Window Manager would keep such windows on top of all other windows.
+    Dock,
+    /// Toolbar windows. "Torn off" from the main application.
+    Toolbar,
+    /// Pinnable menu windows. "Torn off" from the main application.
+    Menu,
+    /// A small persistent utility window, such as a palette or toolbox.
+    Utility,
+    /// The window is a splash screen displayed as an application is starting up.
+    Splash,
+    /// This is a dialog window.
+    Dialog,
+    /// A dropdown menu that usually appears when the user clicks on an item in a menu bar.
+    /// This property is typically used on override-redirect windows.
+    DropdownMenu,
+    /// A popup menu that usually appears when the user right clicks on an object.
+    /// This property is typically used on override-redirect windows.
+    PopupMenu,
+    /// A tooltip window. Usually used to show additional information when hovering over an object with the cursor.
+    /// This property is typically used on override-redirect windows.
+    Tooltip,
+    /// The window is a notification.
+    /// This property is typically used on override-redirect windows.
+    Notification,
+    /// This should be used on the windows that are popped up by combo boxes.
+    /// This property is typically used on override-redirect windows.
+    Combo,
+    /// This indicates the the window is being dragged.
+    /// This property is typically used on override-redirect windows.
+    Dnd,
+    /// This is a normal, top-level window.
+    #[default]
+    Normal,
+}
 
 /// The first argument in the provided hook will be the pointer to `XDisplay`
 /// and the second one the pointer to [`XErrorEvent`]. The returned `bool` is an
@@ -17,7 +62,7 @@ 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.
+/// A unique identifier for an X11 visual.
 pub type XVisualID = u32;
 
 /// A unique identifier for an X11 window.
@@ -25,7 +70,7 @@ 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
+/// This method is provided as a safe way to handle the errors coming from X11
 /// when using xlib in external crates, like glutin for GLX access. Trying to
 /// handle errors by speculating with `XSetErrorHandler` is [`unsafe`].
 ///
@@ -38,17 +83,20 @@ pub type XWindow = u32;
 pub fn register_xlib_error_hook(hook: XlibErrorHook) {
     // Append new hook.
     unsafe {
-        XLIB_ERROR_HOOKS.lock().unwrap().push(hook);
+        crate::platform_impl::XLIB_ERROR_HOOKS
+            .lock()
+            .unwrap()
+            .push(hook);
     }
 }
 
-/// Additional methods on [`EventLoopWindowTarget`] that are specific to X11.
-pub trait EventLoopWindowTargetExtX11 {
-    /// True if the [`EventLoopWindowTarget`] uses X11.
+/// Additional methods on [`ActiveEventLoop`] that are specific to X11.
+pub trait ActiveEventLoopExtX11 {
+    /// True if the [`ActiveEventLoop`] uses X11.
     fn is_x11(&self) -> bool;
 }
 
-impl<T> EventLoopWindowTargetExtX11 for EventLoopWindowTarget<T> {
+impl ActiveEventLoopExtX11 for ActiveEventLoop {
     #[inline]
     fn is_x11(&self) -> bool {
         !self.p.is_wayland()
@@ -70,7 +118,7 @@ pub trait EventLoopBuilderExtX11 {
 impl<T> EventLoopBuilderExtX11 for EventLoopBuilder<T> {
     #[inline]
     fn with_x11(&mut self) -> &mut Self {
-        self.platform_specific.forced_backend = Some(Backend::X);
+        self.platform_specific.forced_backend = Some(crate::platform_impl::Backend::X);
         self
     }
 
@@ -86,8 +134,8 @@ pub trait WindowExtX11 {}
 
 impl WindowExtX11 for Window {}
 
-/// Additional methods on [`WindowBuilder`] that are specific to X11.
-pub trait WindowBuilderExtX11 {
+/// Additional methods on [`WindowAttributes`] that are specific to X11.
+pub trait WindowAttributesExtX11 {
     /// Create this window with a specific X11 visual.
     fn with_x11_visual(self, visual_id: XVisualID) -> Self;
 
@@ -102,23 +150,23 @@ pub trait WindowBuilderExtX11 {
     /// [Desktop Entry Spec](https://specifications.freedesktop.org/desktop-entry-spec/desktop-entry-spec-latest.html#desktop-file-id)
     fn with_name(self, general: impl Into<String>, instance: impl Into<String>) -> Self;
 
-    /// Build window with override-redirect flag; defaults to false. Only relevant on X11.
+    /// Build window with override-redirect flag; defaults to false.
     fn with_override_redirect(self, override_redirect: bool) -> Self;
 
-    /// Build window with `_NET_WM_WINDOW_TYPE` hints; defaults to `Normal`. Only relevant on X11.
-    fn with_x11_window_type(self, x11_window_type: Vec<XWindowType>) -> Self;
+    /// Build window with `_NET_WM_WINDOW_TYPE` hints; defaults to `Normal`.
+    fn with_x11_window_type(self, x11_window_type: Vec<WindowType>) -> Self;
 
-    /// Build window with base size hint. Only implemented on X11.
+    /// Build window with base size hint.
     ///
     /// ```
     /// # use winit::dpi::{LogicalSize, PhysicalSize};
-    /// # use winit::window::WindowBuilder;
-    /// # use winit::platform::x11::WindowBuilderExtX11;
+    /// # use winit::window::Window;
+    /// # use winit::platform::x11::WindowAttributesExtX11;
     /// // Specify the size in logical dimensions like this:
-    /// WindowBuilder::new().with_base_size(LogicalSize::new(400.0, 200.0));
+    /// Window::default_attributes().with_base_size(LogicalSize::new(400.0, 200.0));
     ///
     /// // Or specify the size in physical dimensions like this:
-    /// WindowBuilder::new().with_base_size(PhysicalSize::new(400, 200));
+    /// Window::default_attributes().with_base_size(PhysicalSize::new(400, 200));
     /// ```
     fn with_base_size<S: Into<Size>>(self, base_size: S) -> Self;
 
@@ -127,20 +175,19 @@ pub trait WindowBuilderExtX11 {
     /// # 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();
+    /// use winit::window::Window;
+    /// use winit::event_loop::ActiveEventLoop;
+    /// use winit::platform::x11::{XWindow, WindowAttributesExtX11};
+    /// # fn create_window(event_loop: &ActiveEventLoop) -> Result<(), Box<dyn std::error::Error>> {
     /// 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)?;
+    /// let window_attributes = Window::default_attributes().with_embed_parent_window(parent_window_id);
+    /// let window = event_loop.create_window(window_attributes)?;
     /// # Ok(()) }
     /// ```
     fn with_embed_parent_window(self, parent_window_id: XWindow) -> Self;
 }
 
-impl WindowBuilderExtX11 for WindowBuilder {
+impl WindowAttributesExtX11 for WindowAttributes {
     #[inline]
     fn with_x11_visual(mut self, visual_id: XVisualID) -> Self {
         self.platform_specific.x11.visual_id = Some(visual_id);
@@ -155,7 +202,10 @@ impl WindowBuilderExtX11 for WindowBuilder {
 
     #[inline]
     fn with_name(mut self, general: impl Into<String>, instance: impl Into<String>) -> Self {
-        self.platform_specific.name = Some(ApplicationName::new(general.into(), instance.into()));
+        self.platform_specific.name = Some(crate::platform_impl::ApplicationName::new(
+            general.into(),
+            instance.into(),
+        ));
         self
     }
 
@@ -166,7 +216,7 @@ impl WindowBuilderExtX11 for WindowBuilder {
     }
 
     #[inline]
-    fn with_x11_window_type(mut self, x11_window_types: Vec<XWindowType>) -> Self {
+    fn with_x11_window_type(mut self, x11_window_types: Vec<WindowType>) -> Self {
         self.platform_specific.x11.x11_window_types = x11_window_types;
         self
     }

src/platform_impl/android/keycodes.rs

@@ -174,7 +174,7 @@ pub fn character_map_and_combine_key(
     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:?}");
+            tracing::warn!("Failed to look up `KeyCharacterMap` for device {device_id}: {err:?}");
             return None;
         }
     };
@@ -188,7 +188,7 @@ pub fn character_map_and_combine_key(
                         Ok(Some(key)) => Some(key),
                         Ok(None) => None,
                         Err(err) => {
-                            log::warn!("KeyEvent: Failed to combine 'dead key' accent '{accent}' with '{unicode}': {err:?}");
+                            tracing::warn!("KeyEvent: Failed to combine 'dead key' accent '{accent}' with '{unicode}': {err:?}");
                             None
                         }
                     }
@@ -213,7 +213,7 @@ pub fn character_map_and_combine_key(
             None
         }
         Err(err) => {
-            log::warn!("KeyEvent: Failed to get key map character: {err:?}");
+            tracing::warn!("KeyEvent: Failed to get key map character: {err:?}");
             *combining_accent = None;
             None
         }

src/platform_impl/android/mod.rs

@@ -4,9 +4,10 @@ use std::{
     cell::Cell,
     collections::VecDeque,
     hash::Hash,
+    marker::PhantomData,
     sync::{
         atomic::{AtomicBool, Ordering},
-        mpsc, Arc, Mutex, RwLock,
+        mpsc, Arc, Mutex,
     },
     time::{Duration, Instant},
 };
@@ -15,23 +16,29 @@ use android_activity::input::{InputEvent, KeyAction, Keycode, MotionAction};
 use android_activity::{
     AndroidApp, AndroidAppWaker, ConfigurationRef, InputStatus, MainEvent, Rect,
 };
-use once_cell::sync::Lazy;
+use tracing::{debug, trace, warn};
 
 use crate::{
+    cursor::Cursor,
     dpi::{PhysicalPosition, PhysicalSize, Position, Size},
     error,
     event::{self, Force, InnerSizeWriter, StartCause},
-    event_loop::{self, ControlFlow, DeviceEvents, EventLoopWindowTarget as RootELW},
+    event_loop::{self, ActiveEventLoop as RootAEL, ControlFlow, DeviceEvents},
     platform::pump_events::PumpStatus,
     window::{
-        self, CursorGrabMode, ImePurpose, ResizeDirection, Theme, WindowButtons, WindowLevel,
+        self, CursorGrabMode, CustomCursor, CustomCursorSource, ImePurpose, ResizeDirection, Theme,
+        WindowButtons, WindowLevel,
     },
 };
 use crate::{error::EventLoopError, platform_impl::Fullscreen};
 
 mod keycodes;
 
-static HAS_FOCUS: Lazy<RwLock<bool>> = Lazy::new(|| RwLock::new(true));
+pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursor;
+pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursorSource;
+pub(crate) use crate::icon::NoIcon as PlatformIcon;
+
+static HAS_FOCUS: AtomicBool = AtomicBool::new(true);
 
 /// Returns the minimum `Option<Duration>`, taking into account that `None`
 /// equates to an infinite timeout, not a zero timeout (so can't just use
@@ -138,7 +145,7 @@ pub struct KeyEventExtra {}
 
 pub struct EventLoop<T: 'static> {
     android_app: AndroidApp,
-    window_target: event_loop::EventLoopWindowTarget<T>,
+    window_target: event_loop::ActiveEventLoop,
     redraw_flag: SharedFlag,
     user_events_sender: mpsc::Sender<T>,
     user_events_receiver: PeekableReceiver<T>, //must wake looper whenever something gets sent
@@ -176,8 +183,8 @@ impl<T: 'static> EventLoop<T> {
 
         Ok(Self {
             android_app: android_app.clone(),
-            window_target: event_loop::EventLoopWindowTarget {
-                p: EventLoopWindowTarget {
+            window_target: event_loop::ActiveEventLoop {
+                p: ActiveEventLoop {
                     app: android_app.clone(),
                     control_flow: Cell::new(ControlFlow::default()),
                     exit: Cell::new(false),
@@ -185,9 +192,8 @@ impl<T: 'static> EventLoop<T> {
                         &redraw_flag,
                         android_app.create_waker(),
                     ),
-                    _marker: std::marker::PhantomData,
                 },
-                _marker: std::marker::PhantomData,
+                _marker: PhantomData,
             },
             redraw_flag,
             user_events_sender,
@@ -203,7 +209,7 @@ impl<T: 'static> EventLoop<T> {
 
     fn single_iteration<F>(&mut self, main_event: Option<MainEvent<'_>>, callback: &mut F)
     where
-        F: FnMut(event::Event<T>, &RootELW<T>),
+        F: FnMut(event::Event<T>, &RootAEL),
     {
         trace!("Mainloop iteration");
 
@@ -229,7 +235,7 @@ impl<T: 'static> EventLoop<T> {
                     warn!("TODO: find a way to notify application of content rect change");
                 }
                 MainEvent::GainedFocus => {
-                    *HAS_FOCUS.write().unwrap() = true;
+                    HAS_FOCUS.store(true, Ordering::Relaxed);
                     callback(
                         event::Event::WindowEvent {
                             window_id: window::WindowId(WindowId),
@@ -239,7 +245,7 @@ impl<T: 'static> EventLoop<T> {
                     );
                 }
                 MainEvent::LostFocus => {
-                    *HAS_FOCUS.write().unwrap() = false;
+                    HAS_FOCUS.store(false, Ordering::Relaxed);
                     callback(
                         event::Event::WindowEvent {
                             window_id: window::WindowId(WindowId),
@@ -324,7 +330,7 @@ impl<T: 'static> EventLoop<T> {
                 }
             },
             Err(err) => {
-                log::warn!("Failed to get input events iterator: {err:?}");
+                tracing::warn!("Failed to get input events iterator: {err:?}");
             }
         }
 
@@ -375,7 +381,7 @@ impl<T: 'static> EventLoop<T> {
         callback: &mut F,
     ) -> InputStatus
     where
-        F: FnMut(event::Event<T>, &RootELW<T>),
+        F: FnMut(event::Event<T>, &RootAEL),
     {
         let mut input_status = InputStatus::Handled;
         match event {
@@ -480,19 +486,15 @@ impl<T: 'static> EventLoop<T> {
 
     pub fn run<F>(mut self, event_handler: F) -> Result<(), EventLoopError>
     where
-        F: FnMut(event::Event<T>, &event_loop::EventLoopWindowTarget<T>),
+        F: FnMut(event::Event<T>, &event_loop::ActiveEventLoop),
     {
         self.run_on_demand(event_handler)
     }
 
     pub fn run_on_demand<F>(&mut self, mut event_handler: F) -> Result<(), EventLoopError>
     where
-        F: FnMut(event::Event<T>, &event_loop::EventLoopWindowTarget<T>),
+        F: FnMut(event::Event<T>, &event_loop::ActiveEventLoop),
     {
-        if self.loop_running {
-            return Err(EventLoopError::AlreadyRunning);
-        }
-
         loop {
             match self.pump_events(None, &mut event_handler) {
                 PumpStatus::Exit(0) => {
@@ -510,7 +512,7 @@ impl<T: 'static> EventLoop<T> {
 
     pub fn pump_events<F>(&mut self, timeout: Option<Duration>, mut callback: F) -> PumpStatus
     where
-        F: FnMut(event::Event<T>, &RootELW<T>),
+        F: FnMut(event::Event<T>, &RootAEL),
     {
         if !self.loop_running {
             self.loop_running = true;
@@ -543,7 +545,7 @@ impl<T: 'static> EventLoop<T> {
 
     fn poll_events_with_timeout<F>(&mut self, mut timeout: Option<Duration>, mut callback: F)
     where
-        F: FnMut(event::Event<T>, &RootELW<T>),
+        F: FnMut(event::Event<T>, &RootAEL),
     {
         let start = Instant::now();
 
@@ -619,7 +621,7 @@ impl<T: 'static> EventLoop<T> {
         });
     }
 
-    pub fn window_target(&self) -> &event_loop::EventLoopWindowTarget<T> {
+    pub fn window_target(&self) -> &event_loop::ActiveEventLoop {
         &self.window_target
     }
 
@@ -663,19 +665,25 @@ impl<T> EventLoopProxy<T> {
     }
 }
 
-pub struct EventLoopWindowTarget<T: 'static> {
+pub struct ActiveEventLoop {
     app: AndroidApp,
     control_flow: Cell<ControlFlow>,
     exit: Cell<bool>,
     redraw_requester: RedrawRequester,
-    _marker: std::marker::PhantomData<T>,
 }
 
-impl<T: 'static> EventLoopWindowTarget<T> {
+impl ActiveEventLoop {
     pub fn primary_monitor(&self) -> Option<MonitorHandle> {
         Some(MonitorHandle::new(self.app.clone()))
     }
 
+    pub fn create_custom_cursor(&self, source: CustomCursorSource) -> CustomCursor {
+        let _ = source.inner;
+        CustomCursor {
+            inner: PlatformCustomCursor,
+        }
+    }
+
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         let mut v = VecDeque::with_capacity(1);
         v.push_back(MonitorHandle::new(self.app.clone()));
@@ -720,6 +728,29 @@ impl<T: 'static> EventLoopWindowTarget<T> {
     pub(crate) fn exiting(&self) -> bool {
         self.exit.get()
     }
+
+    pub(crate) fn owned_display_handle(&self) -> OwnedDisplayHandle {
+        OwnedDisplayHandle
+    }
+}
+
+#[derive(Clone)]
+pub(crate) struct OwnedDisplayHandle;
+
+impl OwnedDisplayHandle {
+    #[cfg(feature = "rwh_05")]
+    #[inline]
+    pub fn raw_display_handle_rwh_05(&self) -> rwh_05::RawDisplayHandle {
+        rwh_05::AndroidDisplayHandle::empty().into()
+    }
+
+    #[cfg(feature = "rwh_06")]
+    #[inline]
+    pub fn raw_display_handle_rwh_06(
+        &self,
+    ) -> Result<rwh_06::RawDisplayHandle, rwh_06::HandleError> {
+        Ok(rwh_06::AndroidDisplayHandle::new().into())
+    }
 }
 
 #[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
@@ -753,7 +784,7 @@ impl DeviceId {
 }
 
 #[derive(Clone, Copy, Debug, Default, Eq, PartialEq)]
-pub struct PlatformSpecificWindowBuilderAttributes;
+pub struct PlatformSpecificWindowAttributes;
 
 pub(crate) struct Window {
     app: AndroidApp,
@@ -761,10 +792,9 @@ pub(crate) struct Window {
 }
 
 impl Window {
-    pub(crate) fn new<T: 'static>(
-        el: &EventLoopWindowTarget<T>,
+    pub(crate) fn new(
+        el: &ActiveEventLoop,
         _window_attrs: window::WindowAttributes,
-        _: PlatformSpecificWindowBuilderAttributes,
     ) -> Result<Self, error::OsError> {
         // FIXME this ignores requested window attributes
 
@@ -908,7 +938,7 @@ impl Window {
 
     pub fn request_user_attention(&self, _request_type: Option<window::UserAttentionType>) {}
 
-    pub fn set_cursor_icon(&self, _: window::CursorIcon) {}
+    pub fn set_cursor(&self, _: Cursor) {}
 
     pub fn set_cursor_position(&self, _: Position) -> Result<(), error::ExternalError> {
         Err(error::ExternalError::NotSupported(
@@ -984,7 +1014,7 @@ impl Window {
         if let Some(native_window) = self.app.native_window().as_ref() {
             native_window.raw_window_handle()
         } else {
-            log::error!("Cannot get the native window, it's null and will always be null before Event::Resumed and after Event::Suspended. Make sure you only call this function between those events.");
+            tracing::error!("Cannot get the native window, it's null and will always be null before Event::Resumed and after Event::Suspended. Make sure you only call this function between those events.");
             Err(rwh_06::HandleError::Unavailable)
         }
     }
@@ -1015,7 +1045,7 @@ impl Window {
     pub fn set_content_protected(&self, _protected: bool) {}
 
     pub fn has_focus(&self) -> bool {
-        *HAS_FOCUS.read().unwrap()
+        HAS_FOCUS.load(Ordering::Relaxed)
     }
 
     pub fn title(&self) -> String {
@@ -1035,8 +1065,6 @@ impl Display for OsError {
     }
 }
 
-pub(crate) use crate::icon::NoIcon as PlatformIcon;
-
 #[derive(Clone, Debug, PartialEq, Eq, Hash)]
 pub struct MonitorHandle {
     app: AndroidApp,
@@ -1086,11 +1114,11 @@ impl MonitorHandle {
         None
     }
 
-    pub fn video_modes(&self) -> impl Iterator<Item = VideoMode> {
+    pub fn video_modes(&self) -> impl Iterator<Item = VideoModeHandle> {
         let size = self.size().into();
         // FIXME this is not the real refresh rate
         // (it is guaranteed to support 32 bit color though)
-        std::iter::once(VideoMode {
+        std::iter::once(VideoModeHandle {
             size,
             bit_depth: 32,
             refresh_rate_millihertz: 60000,
@@ -1100,14 +1128,14 @@ impl MonitorHandle {
 }
 
 #[derive(Clone, Debug, Eq, Hash, PartialEq)]
-pub struct VideoMode {
+pub struct VideoModeHandle {
     size: (u32, u32),
     bit_depth: u16,
     refresh_rate_millihertz: u32,
     monitor: MonitorHandle,
 }
 
-impl VideoMode {
+impl VideoModeHandle {
     pub fn size(&self) -> PhysicalSize<u32> {
         self.size.into()
     }

src/platform_impl/ios/app_delegate.rs

@@ -0,0 +1,103 @@
+use icrate::Foundation::{MainThreadMarker, NSObject, NSObjectProtocol};
+use objc2::{declare_class, mutability, ClassType, DeclaredClass};
+
+use super::app_state::{self, EventWrapper};
+use super::uikit::{UIApplication, UIWindow};
+use super::window::WinitUIWindow;
+use crate::{
+    event::{Event, WindowEvent},
+    window::WindowId as RootWindowId,
+};
+
+declare_class!(
+    pub struct AppDelegate;
+
+    unsafe impl ClassType for AppDelegate {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+        const NAME: &'static str = "WinitApplicationDelegate";
+    }
+
+    impl DeclaredClass for AppDelegate {}
+
+    // UIApplicationDelegate protocol
+    unsafe impl AppDelegate {
+        #[method(application:didFinishLaunchingWithOptions:)]
+        fn did_finish_launching(&self, _application: &UIApplication, _: *mut NSObject) -> bool {
+            app_state::did_finish_launching(MainThreadMarker::new().unwrap());
+            true
+        }
+
+        #[method(applicationDidBecomeActive:)]
+        fn did_become_active(&self, _application: &UIApplication) {
+            let mtm = MainThreadMarker::new().unwrap();
+            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::Resumed))
+        }
+
+        #[method(applicationWillResignActive:)]
+        fn will_resign_active(&self, _application: &UIApplication) {
+            let mtm = MainThreadMarker::new().unwrap();
+            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::Suspended))
+        }
+
+        #[method(applicationWillEnterForeground:)]
+        fn will_enter_foreground(&self, application: &UIApplication) {
+            self.send_occluded_event_for_all_windows(application, false);
+        }
+
+        #[method(applicationDidEnterBackground:)]
+        fn did_enter_background(&self, application: &UIApplication) {
+            self.send_occluded_event_for_all_windows(application, true);
+        }
+
+        #[method(applicationWillTerminate:)]
+        fn will_terminate(&self, application: &UIApplication) {
+            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::Destroyed,
+                    }));
+                }
+            }
+            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))
+        }
+    }
+);
+
+impl AppDelegate {
+    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/app_state.rs

@@ -3,10 +3,10 @@
 use std::{
     cell::{RefCell, RefMut},
     collections::HashSet,
-    mem,
+    fmt, mem,
     os::raw::c_void,
     ptr,
-    sync::{Arc, Mutex},
+    sync::{Arc, Mutex, OnceLock},
     time::Instant,
 };
 
@@ -22,15 +22,13 @@ use icrate::Foundation::{
 use objc2::rc::Id;
 use objc2::runtime::AnyObject;
 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 super::window::WinitUIWindow;
 use crate::{
     dpi::PhysicalSize,
     event::{Event, InnerSizeWriter, StartCause, WindowEvent},
-    event_loop::ControlFlow,
+    event_loop::{ActiveEventLoop as RootActiveEventLoop, ControlFlow},
     window::WindowId as RootWindowId,
 };
 
@@ -47,8 +45,32 @@ macro_rules! bug_assert {
 }
 
 #[derive(Debug)]
-pub enum EventWrapper {
-    StaticEvent(Event<Never>),
+pub(crate) struct HandlePendingUserEvents;
+
+pub(crate) struct EventLoopHandler {
+    #[allow(clippy::type_complexity)]
+    pub(crate) handler: Box<dyn FnMut(Event<HandlePendingUserEvents>, &RootActiveEventLoop)>,
+    pub(crate) event_loop: RootActiveEventLoop,
+}
+
+impl fmt::Debug for EventLoopHandler {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("EventLoopHandler")
+            .field("handler", &"...")
+            .field("event_loop", &self.event_loop)
+            .finish()
+    }
+}
+
+impl EventLoopHandler {
+    fn handle_event(&mut self, event: Event<HandlePendingUserEvents>) {
+        (self.handler)(event, &self.event_loop)
+    }
+}
+
+#[derive(Debug)]
+pub(crate) enum EventWrapper {
+    StaticEvent(Event<HandlePendingUserEvents>),
     ScaleFactorChanged(ScaleFactorChanged),
 }
 
@@ -61,7 +83,7 @@ pub struct ScaleFactorChanged {
 
 enum UserCallbackTransitionResult<'a> {
     Success {
-        event_handler: Box<dyn EventHandler>,
+        handler: EventLoopHandler,
         active_control_flow: ControlFlow,
         processing_redraws: bool,
     },
@@ -70,7 +92,7 @@ enum UserCallbackTransitionResult<'a> {
     },
 }
 
-impl Event<Never> {
+impl Event<HandlePendingUserEvents> {
     fn is_redraw(&self) -> bool {
         matches!(
             self,
@@ -94,11 +116,11 @@ enum AppStateImpl {
     Launching {
         queued_windows: Vec<Id<WinitUIWindow>>,
         queued_events: Vec<EventWrapper>,
-        queued_event_handler: Box<dyn EventHandler>,
+        queued_handler: EventLoopHandler,
         queued_gpu_redraws: HashSet<Id<WinitUIWindow>>,
     },
     ProcessingEvents {
-        event_handler: Box<dyn EventHandler>,
+        handler: EventLoopHandler,
         queued_gpu_redraws: HashSet<Id<WinitUIWindow>>,
         active_control_flow: ControlFlow,
     },
@@ -108,15 +130,15 @@ enum AppStateImpl {
         queued_gpu_redraws: HashSet<Id<WinitUIWindow>>,
     },
     ProcessingRedraws {
-        event_handler: Box<dyn EventHandler>,
+        handler: EventLoopHandler,
         active_control_flow: ControlFlow,
     },
     Waiting {
-        waiting_event_handler: Box<dyn EventHandler>,
+        waiting_handler: EventLoopHandler,
         start: Instant,
     },
     PollFinished {
-        waiting_event_handler: Box<dyn EventHandler>,
+        waiting_handler: EventLoopHandler,
     },
     Terminated,
 }
@@ -204,7 +226,7 @@ impl AppState {
         matches!(self.state(), AppStateImpl::Terminated)
     }
 
-    fn will_launch_transition(&mut self, queued_event_handler: Box<dyn EventHandler>) {
+    fn will_launch_transition(&mut self, queued_handler: EventLoopHandler) {
         let (queued_windows, queued_events, queued_gpu_redraws) = match self.take_state() {
             AppStateImpl::NotLaunched {
                 queued_windows,
@@ -216,28 +238,28 @@ impl AppState {
         self.set_state(AppStateImpl::Launching {
             queued_windows,
             queued_events,
-            queued_event_handler,
+            queued_handler,
             queued_gpu_redraws,
         });
     }
 
     fn did_finish_launching_transition(&mut self) -> (Vec<Id<WinitUIWindow>>, Vec<EventWrapper>) {
-        let (windows, events, event_handler, queued_gpu_redraws) = match self.take_state() {
+        let (windows, events, handler, queued_gpu_redraws) = match self.take_state() {
             AppStateImpl::Launching {
                 queued_windows,
                 queued_events,
-                queued_event_handler,
+                queued_handler,
                 queued_gpu_redraws,
             } => (
                 queued_windows,
                 queued_events,
-                queued_event_handler,
+                queued_handler,
                 queued_gpu_redraws,
             ),
             s => bug!("unexpected state {:?}", s),
         };
         self.set_state(AppStateImpl::ProcessingEvents {
-            event_handler,
+            handler,
             active_control_flow: self.control_flow,
             queued_gpu_redraws,
         });
@@ -251,24 +273,19 @@ impl AppState {
             return None;
         }
 
-        let (event_handler, event) = match (self.control_flow, self.take_state()) {
-            (
-                ControlFlow::Poll,
-                AppStateImpl::PollFinished {
-                    waiting_event_handler,
-                },
-            ) => (
-                waiting_event_handler,
+        let (handler, event) = match (self.control_flow, self.take_state()) {
+            (ControlFlow::Poll, AppStateImpl::PollFinished { waiting_handler }) => (
+                waiting_handler,
                 EventWrapper::StaticEvent(Event::NewEvents(StartCause::Poll)),
             ),
             (
                 ControlFlow::Wait,
                 AppStateImpl::Waiting {
-                    waiting_event_handler,
+                    waiting_handler,
                     start,
                 },
             ) => (
-                waiting_event_handler,
+                waiting_handler,
                 EventWrapper::StaticEvent(Event::NewEvents(StartCause::WaitCancelled {
                     start,
                     requested_resume: None,
@@ -277,7 +294,7 @@ impl AppState {
             (
                 ControlFlow::WaitUntil(requested_resume),
                 AppStateImpl::Waiting {
-                    waiting_event_handler,
+                    waiting_handler,
                     start,
                 },
             ) => {
@@ -292,13 +309,13 @@ impl AppState {
                         requested_resume: Some(requested_resume),
                     }))
                 };
-                (waiting_event_handler, event)
+                (waiting_handler, event)
             }
             s => bug!("`EventHandler` unexpectedly woke up {:?}", s),
         };
 
         self.set_state(AppStateImpl::ProcessingEvents {
-            event_handler,
+            handler,
             queued_gpu_redraws: Default::default(),
             active_control_flow: self.control_flow,
         });
@@ -343,25 +360,20 @@ impl AppState {
             }
         }
 
-        let (event_handler, queued_gpu_redraws, active_control_flow, processing_redraws) =
+        let (handler, queued_gpu_redraws, active_control_flow, processing_redraws) =
             match self.take_state() {
                 AppStateImpl::Launching { .. }
                 | AppStateImpl::NotLaunched { .. }
                 | AppStateImpl::InUserCallback { .. } => unreachable!(),
                 AppStateImpl::ProcessingEvents {
-                    event_handler,
+                    handler,
                     queued_gpu_redraws,
                     active_control_flow,
-                } => (
-                    event_handler,
-                    queued_gpu_redraws,
-                    active_control_flow,
-                    false,
-                ),
+                } => (handler, queued_gpu_redraws, active_control_flow, false),
                 AppStateImpl::ProcessingRedraws {
-                    event_handler,
+                    handler,
                     active_control_flow,
-                } => (event_handler, Default::default(), active_control_flow, true),
+                } => (handler, Default::default(), active_control_flow, true),
                 AppStateImpl::PollFinished { .. }
                 | AppStateImpl::Waiting { .. }
                 | AppStateImpl::Terminated => unreachable!(),
@@ -371,23 +383,23 @@ impl AppState {
             queued_gpu_redraws,
         });
         UserCallbackTransitionResult::Success {
-            event_handler,
+            handler,
             active_control_flow,
             processing_redraws,
         }
     }
 
     fn main_events_cleared_transition(&mut self) -> HashSet<Id<WinitUIWindow>> {
-        let (event_handler, queued_gpu_redraws, active_control_flow) = match self.take_state() {
+        let (handler, queued_gpu_redraws, active_control_flow) = match self.take_state() {
             AppStateImpl::ProcessingEvents {
-                event_handler,
+                handler,
                 queued_gpu_redraws,
                 active_control_flow,
-            } => (event_handler, queued_gpu_redraws, active_control_flow),
+            } => (handler, queued_gpu_redraws, active_control_flow),
             s => bug!("unexpected state {:?}", s),
         };
         self.set_state(AppStateImpl::ProcessingRedraws {
-            event_handler,
+            handler,
             active_control_flow,
         });
         queued_gpu_redraws
@@ -397,11 +409,11 @@ impl AppState {
         if !self.has_launched() || self.has_terminated() {
             return;
         }
-        let (waiting_event_handler, old) = match self.take_state() {
+        let (waiting_handler, old) = match self.take_state() {
             AppStateImpl::ProcessingRedraws {
-                event_handler,
+                handler,
                 active_control_flow,
-            } => (event_handler, active_control_flow),
+            } => (handler, active_control_flow),
             s => bug!("unexpected state {:?}", s),
         };
 
@@ -410,7 +422,7 @@ impl AppState {
             (ControlFlow::Wait, ControlFlow::Wait) => {
                 let start = Instant::now();
                 self.set_state(AppStateImpl::Waiting {
-                    waiting_event_handler,
+                    waiting_handler,
                     start,
                 });
             }
@@ -419,14 +431,14 @@ impl AppState {
             {
                 let start = Instant::now();
                 self.set_state(AppStateImpl::Waiting {
-                    waiting_event_handler,
+                    waiting_handler,
                     start,
                 });
             }
             (_, ControlFlow::Wait) => {
                 let start = Instant::now();
                 self.set_state(AppStateImpl::Waiting {
-                    waiting_event_handler,
+                    waiting_handler,
                     start,
                 });
                 self.waker.stop()
@@ -434,24 +446,22 @@ impl AppState {
             (_, ControlFlow::WaitUntil(new_instant)) => {
                 let start = Instant::now();
                 self.set_state(AppStateImpl::Waiting {
-                    waiting_event_handler,
+                    waiting_handler,
                     start,
                 });
                 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.set_state(AppStateImpl::PollFinished { waiting_handler });
                 self.waker.start()
             }
         }
     }
 
-    fn terminated_transition(&mut self) -> Box<dyn EventHandler> {
+    fn terminated_transition(&mut self) -> EventLoopHandler {
         match self.replace_state(AppStateImpl::Terminated) {
-            AppStateImpl::ProcessingEvents { event_handler, .. } => event_handler,
+            AppStateImpl::ProcessingEvents { handler, .. } => handler,
             s => bug!("`LoopExiting` happened while not processing events {:?}", s),
         }
     }
@@ -516,8 +526,8 @@ 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)
+pub(crate) fn will_launch(mtm: MainThreadMarker, queued_handler: EventLoopHandler) {
+    AppState::get_mut(mtm).will_launch_transition(queued_handler)
 }
 
 pub fn did_finish_launching(mtm: MainThreadMarker) {
@@ -540,7 +550,7 @@ pub fn did_finish_launching(mtm: MainThreadMarker) {
         //
         // relevant iOS log:
         // ```
-        // [ApplicationLifecycle] Windows were created before application initialzation
+        // [ApplicationLifecycle] Windows were created before application initialization
         // completed. This may result in incorrect visual appearance.
         // ```
         let screen = window.screen();
@@ -594,17 +604,17 @@ pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
         return;
     }
 
-    let (mut event_handler, active_control_flow, processing_redraws) =
+    let (mut handler, active_control_flow, processing_redraws) =
         match this.try_user_callback_transition() {
             UserCallbackTransitionResult::ReentrancyPrevented { queued_events } => {
                 queued_events.extend(events);
                 return;
             }
             UserCallbackTransitionResult::Success {
-                event_handler,
+                handler,
                 active_control_flow,
                 processing_redraws,
-            } => (event_handler, active_control_flow, processing_redraws),
+            } => (handler, active_control_flow, processing_redraws),
         };
     drop(this);
 
@@ -612,18 +622,16 @@ pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
         match wrapper {
             EventWrapper::StaticEvent(event) => {
                 if !processing_redraws && event.is_redraw() {
-                    log::info!("processing `RedrawRequested` during the main event loop");
+                    tracing::info!("processing `RedrawRequested` during the main event loop");
                 } else if processing_redraws && !event.is_redraw() {
-                    log::warn!(
+                    tracing::warn!(
                         "processing non `RedrawRequested` event after the main event loop: {:#?}",
                         event
                     );
                 }
-                event_handler.handle_nonuser_event(event)
-            }
-            EventWrapper::ScaleFactorChanged(event) => {
-                handle_hidpi_proxy(&mut event_handler, event)
+                handler.handle_event(event)
             }
+            EventWrapper::ScaleFactorChanged(event) => handle_hidpi_proxy(&mut handler, event),
         }
     }
 
@@ -650,12 +658,12 @@ pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
                     "redraw queued while processing redraws"
                 );
                 AppStateImpl::ProcessingRedraws {
-                    event_handler,
+                    handler,
                     active_control_flow,
                 }
             } else {
                 AppStateImpl::ProcessingEvents {
-                    event_handler,
+                    handler,
                     queued_gpu_redraws,
                     active_control_flow,
                 }
@@ -668,18 +676,16 @@ pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
             match wrapper {
                 EventWrapper::StaticEvent(event) => {
                     if !processing_redraws && event.is_redraw() {
-                        log::info!("processing `RedrawRequested` during the main event loop");
+                        tracing::info!("processing `RedrawRequested` during the main event loop");
                     } else if processing_redraws && !event.is_redraw() {
-                        log::warn!(
+                        tracing::warn!(
                             "processing non-`RedrawRequested` event after the main event loop: {:#?}",
                             event
                         );
                     }
-                    event_handler.handle_nonuser_event(event)
-                }
-                EventWrapper::ScaleFactorChanged(event) => {
-                    handle_hidpi_proxy(&mut event_handler, event)
+                    handler.handle_event(event)
                 }
+                EventWrapper::ScaleFactorChanged(event) => handle_hidpi_proxy(&mut handler, event),
             }
         }
     }
@@ -687,23 +693,23 @@ pub(crate) fn handle_nonuser_events<I: IntoIterator<Item = EventWrapper>>(
 
 fn handle_user_events(mtm: MainThreadMarker) {
     let mut this = AppState::get_mut(mtm);
-    let (mut event_handler, active_control_flow, processing_redraws) =
+    let (mut handler, active_control_flow, processing_redraws) =
         match this.try_user_callback_transition() {
             UserCallbackTransitionResult::ReentrancyPrevented { .. } => {
                 bug!("unexpected attempted to process an event")
             }
             UserCallbackTransitionResult::Success {
-                event_handler,
+                handler,
                 active_control_flow,
                 processing_redraws,
-            } => (event_handler, active_control_flow, processing_redraws),
+            } => (handler, active_control_flow, processing_redraws),
         };
     if processing_redraws {
         bug!("user events attempted to be sent out while `ProcessingRedraws`");
     }
     drop(this);
 
-    event_handler.handle_user_events();
+    handler.handle_event(Event::UserEvent(HandlePendingUserEvents));
 
     loop {
         let mut this = AppState::get_mut(mtm);
@@ -723,7 +729,7 @@ fn handle_user_events(mtm: MainThreadMarker) {
                 _ => unreachable!(),
             };
             this.app_state = Some(AppStateImpl::ProcessingEvents {
-                event_handler,
+                handler,
                 queued_gpu_redraws,
                 active_control_flow,
             });
@@ -733,13 +739,12 @@ fn handle_user_events(mtm: MainThreadMarker) {
 
         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) => handler.handle_event(event),
+                EventWrapper::ScaleFactorChanged(event) => handle_hidpi_proxy(&mut handler, event),
             }
         }
-        event_handler.handle_user_events();
+
+        handler.handle_event(Event::UserEvent(HandlePendingUserEvents));
     }
 }
 
@@ -779,13 +784,13 @@ pub fn handle_events_cleared(mtm: MainThreadMarker) {
 
 pub fn terminated(mtm: MainThreadMarker) {
     let mut this = AppState::get_mut(mtm);
-    let mut event_handler = this.terminated_transition();
+    let mut handler = this.terminated_transition();
     drop(this);
 
-    event_handler.handle_nonuser_event(Event::LoopExiting)
+    handler.handle_event(Event::LoopExiting)
 }
 
-fn handle_hidpi_proxy(event_handler: &mut Box<dyn EventHandler>, event: ScaleFactorChanged) {
+fn handle_hidpi_proxy(handler: &mut EventLoopHandler, event: ScaleFactorChanged) {
     let ScaleFactorChanged {
         suggested_size,
         scale_factor,
@@ -799,7 +804,7 @@ fn handle_hidpi_proxy(event_handler: &mut Box<dyn EventHandler>, event: ScaleFac
             inner_size_writer: InnerSizeWriter::new(Arc::downgrade(&new_inner_size)),
         },
     };
-    event_handler.handle_nonuser_event(event);
+    handler.handle_event(event);
     let (view, screen_frame) = get_view_and_screen_frame(&window);
     let physical_size = *new_inner_size.lock().unwrap();
     drop(new_inner_size);
@@ -896,17 +901,17 @@ macro_rules! os_capabilities {
             os_version: NSOperatingSystemVersion,
         }
 
-        impl From<NSOperatingSystemVersion> for OSCapabilities {
-            fn from(os_version: NSOperatingSystemVersion) -> OSCapabilities {
+        impl OSCapabilities {
+            fn from_os_version(os_version: NSOperatingSystemVersion) -> Self {
                 $(let $name = meets_requirements(os_version, $major, $minor);)*
-                OSCapabilities { $($name,)* os_version, }
+                Self { $($name,)* os_version, }
             }
         }
 
         impl OSCapabilities {$(
             $(#[$attr])*
             pub fn $error_name(&self, extra_msg: &str) {
-                log::warn!(
+                tracing::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,
                     extra_msg
@@ -944,25 +949,29 @@ fn meets_requirements(
     (version.majorVersion, version.minorVersion) >= (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 atleast_ios_8: bool = msg_send![
-                &process_info,
-                respondsToSelector: sel!(operatingSystemVersion)
-            ];
-            // winit requires atleast iOS 8 because no one has put the time into supporting earlier os versions.
-            // Older iOS versions are increasingly difficult to test. For example, Xcode 11 does not support
-            // debugging on devices with an iOS version of less than 8. Another example, in order to use an iOS
-            // simulator older than iOS 8, you must download an older version of Xcode (<9), and at least Xcode 7
-            // has been tested to not even run on macOS 10.15 - Xcode 8 might?
-            //
-            // 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()
-        };
-        version.into()
-    });
-    OS_CAPABILITIES.clone()
+fn get_version() -> NSOperatingSystemVersion {
+    unsafe {
+        let process_info = NSProcessInfo::processInfo();
+        let atleast_ios_8: bool = msg_send![
+            &process_info,
+            respondsToSelector: sel!(operatingSystemVersion)
+        ];
+        // winit requires atleast iOS 8 because no one has put the time into supporting earlier os versions.
+        // Older iOS versions are increasingly difficult to test. For example, Xcode 11 does not support
+        // debugging on devices with an iOS version of less than 8. Another example, in order to use an iOS
+        // simulator older than iOS 8, you must download an older version of Xcode (<9), and at least Xcode 7
+        // has been tested to not even run on macOS 10.15 - Xcode 8 might?
+        //
+        // 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()
+    }
+}
+
+pub fn os_capabilities() -> OSCapabilities {
+    // Cache the version lookup for efficiency
+    static OS_CAPABILITIES: OnceLock<OSCapabilities> = OnceLock::new();
+    OS_CAPABILITIES
+        .get_or_init(|| OSCapabilities::from_os_version(get_version()))
+        .clone()
 }

src/platform_impl/ios/event_loop.rs

@@ -1,7 +1,6 @@
 use std::{
     collections::VecDeque,
     ffi::c_void,
-    fmt::{self, Debug},
     marker::PhantomData,
     ptr,
     sync::mpsc::{self, Receiver, Sender},
@@ -21,25 +20,33 @@ use crate::{
     error::EventLoopError,
     event::Event,
     event_loop::{
-        ControlFlow, DeviceEvents, EventLoopClosed,
-        EventLoopWindowTarget as RootEventLoopWindowTarget,
+        ActiveEventLoop as RootActiveEventLoop, ControlFlow, DeviceEvents, EventLoopClosed,
     },
     platform::ios::Idiom,
+    platform_impl::platform::app_state::{EventLoopHandler, HandlePendingUserEvents},
+    window::{CustomCursor, CustomCursorSource},
 };
 
-use super::{app_state, monitor, view, MonitorHandle};
+use super::{app_delegate::AppDelegate, uikit::UIUserInterfaceIdiom};
+use super::{app_state, monitor, MonitorHandle};
 use super::{
     app_state::AppState,
     uikit::{UIApplication, UIApplicationMain, UIDevice, UIScreen},
 };
 
 #[derive(Debug)]
-pub struct EventLoopWindowTarget<T: 'static> {
+pub struct ActiveEventLoop {
     pub(super) mtm: MainThreadMarker,
-    p: PhantomData<T>,
 }
 
-impl<T: 'static> EventLoopWindowTarget<T> {
+impl ActiveEventLoop {
+    pub fn create_custom_cursor(&self, source: CustomCursorSource) -> CustomCursor {
+        let _ = source.inner;
+        CustomCursor {
+            inner: super::PlatformCustomCursor,
+        }
+    }
+
     pub fn available_monitors(&self) -> VecDeque<MonitorHandle> {
         monitor::uiscreens(self.mtm)
     }
@@ -77,20 +84,57 @@ impl<T: 'static> EventLoopWindowTarget<T> {
 
     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");
+        // it is not possible to quit an iOS app gracefully and programmatically
+        tracing::warn!("`ControlFlow::Exit` ignored on iOS");
     }
 
     pub(crate) fn exiting(&self) -> bool {
         false
     }
+
+    pub(crate) fn owned_display_handle(&self) -> OwnedDisplayHandle {
+        OwnedDisplayHandle
+    }
+}
+
+#[derive(Clone)]
+pub(crate) struct OwnedDisplayHandle;
+
+impl OwnedDisplayHandle {
+    #[cfg(feature = "rwh_05")]
+    #[inline]
+    pub fn raw_display_handle_rwh_05(&self) -> rwh_05::RawDisplayHandle {
+        rwh_05::UiKitDisplayHandle::empty().into()
+    }
+
+    #[cfg(feature = "rwh_06")]
+    #[inline]
+    pub fn raw_display_handle_rwh_06(
+        &self,
+    ) -> Result<rwh_06::RawDisplayHandle, rwh_06::HandleError> {
+        Ok(rwh_06::UiKitDisplayHandle::new().into())
+    }
+}
+
+fn map_user_event<T: 'static>(
+    mut handler: impl FnMut(Event<T>, &RootActiveEventLoop),
+    receiver: mpsc::Receiver<T>,
+) -> impl FnMut(Event<HandlePendingUserEvents>, &RootActiveEventLoop) {
+    move |event, window_target| match event.map_nonuser_event() {
+        Ok(event) => (handler)(event, window_target),
+        Err(_) => {
+            for event in receiver.try_iter() {
+                (handler)(Event::UserEvent(event), window_target);
+            }
+        }
+    }
 }
 
 pub struct EventLoop<T: 'static> {
     mtm: MainThreadMarker,
     sender: Sender<T>,
     receiver: Receiver<T>,
-    window_target: RootEventLoopWindowTarget<T>,
+    window_target: RootActiveEventLoop,
 }
 
 #[derive(Default, Debug, Copy, Clone, PartialEq, Eq, Hash)]
@@ -122,60 +166,60 @@ impl<T: 'static> EventLoop<T> {
             mtm,
             sender,
             receiver,
-            window_target: RootEventLoopWindowTarget {
-                p: EventLoopWindowTarget {
-                    mtm,
-                    p: PhantomData,
-                },
+            window_target: RootActiveEventLoop {
+                p: ActiveEventLoop { mtm },
                 _marker: PhantomData,
             },
         })
     }
 
-    pub fn run<F>(self, event_handler: F) -> !
+    pub fn run<F>(self, handler: F) -> !
     where
-        F: FnMut(Event<T>, &RootEventLoopWindowTarget<T>),
+        F: FnMut(Event<T>, &RootActiveEventLoop),
     {
-        unsafe {
-            let application = UIApplication::shared(self.mtm);
-            assert!(
-                application.is_none(),
-                "\
+        let application = UIApplication::shared(self.mtm);
+        assert!(
+            application.is_none(),
+            "\
                 `EventLoop` cannot be `run` after a call to `UIApplicationMain` on iOS\n\
-                 Note: `EventLoop::run` calls `UIApplicationMain` on iOS",
-            );
+                 Note: `EventLoop::run_app` 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 = map_user_event(handler, self.receiver);
 
-            let handler = EventLoopHandler {
-                f: event_handler,
-                receiver: self.receiver,
-                event_loop: self.window_target,
-            };
+        let handler = unsafe {
+            std::mem::transmute::<
+                Box<dyn FnMut(Event<HandlePendingUserEvents>, &RootActiveEventLoop)>,
+                Box<dyn FnMut(Event<HandlePendingUserEvents>, &RootActiveEventLoop)>,
+            >(Box::new(handler))
+        };
 
-            app_state::will_launch(self.mtm, Box::new(handler));
+        let handler = EventLoopHandler {
+            handler,
+            event_loop: self.window_target,
+        };
 
-            // Ensure application delegate is initialized
-            view::WinitApplicationDelegate::class();
+        app_state::will_launch(self.mtm, handler);
 
+        // Ensure application delegate is initialized
+        let _ = AppDelegate::class();
+
+        unsafe {
             UIApplicationMain(
                 0,
                 ptr::null(),
                 None,
-                Some(&NSString::from_str("WinitApplicationDelegate")),
-            );
-            unreachable!()
-        }
+                Some(&NSString::from_str(AppDelegate::NAME)),
+            )
+        };
+        unreachable!()
     }
 
     pub fn create_proxy(&self) -> EventLoopProxy<T> {
         EventLoopProxy::new(self.sender.clone())
     }
 
-    pub fn window_target(&self) -> &RootEventLoopWindowTarget<T> {
+    pub fn window_target(&self) -> &RootActiveEventLoop {
         &self.window_target
     }
 }
@@ -183,7 +227,14 @@ impl<T: 'static> EventLoop<T> {
 // EventLoopExtIOS
 impl<T: 'static> EventLoop<T> {
     pub fn idiom(&self) -> Idiom {
-        UIDevice::current(self.mtm).userInterfaceIdiom().into()
+        match UIDevice::current(self.mtm).userInterfaceIdiom() {
+            UIUserInterfaceIdiom::Unspecified => Idiom::Unspecified,
+            UIUserInterfaceIdiom::Phone => Idiom::Phone,
+            UIUserInterfaceIdiom::Pad => Idiom::Pad,
+            UIUserInterfaceIdiom::TV => Idiom::TV,
+            UIUserInterfaceIdiom::CarPlay => Idiom::CarPlay,
+            _ => Idiom::Unspecified,
+        }
     }
 }
 
@@ -193,6 +244,7 @@ pub struct EventLoopProxy<T> {
 }
 
 unsafe impl<T: Send> Send for EventLoopProxy<T> {}
+unsafe impl<T: Send> Sync for EventLoopProxy<T> {}
 
 impl<T> Clone for EventLoopProxy<T> {
     fn clone(&self) -> EventLoopProxy<T> {
@@ -342,39 +394,3 @@ fn setup_control_flow_observers() {
         CFRunLoopAddObserver(main_loop, end_observer, kCFRunLoopDefaultMode);
     }
 }
-
-#[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);
-}
-
-struct EventLoopHandler<T: 'static> {
-    f: Box<EventHandlerCallback<T>>,
-    receiver: Receiver<T>,
-    event_loop: RootEventLoopWindowTarget<T>,
-}
-
-impl<T: 'static> Debug for EventLoopHandler<T> {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.debug_struct("EventLoopHandler")
-            .field("event_loop", &self.event_loop)
-            .finish()
-    }
-}
-
-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);
-    }
-
-    fn handle_user_events(&mut self) {
-        for event in self.receiver.try_iter() {
-            (self.f)(Event::UserEvent(event), &self.event_loop);
-        }
-    }
-}

src/platform_impl/ios/ffi.rs

@@ -1,76 +0,0 @@
-#![allow(non_camel_case_types, non_snake_case, non_upper_case_globals)]
-
-use icrate::Foundation::{NSInteger, NSUInteger};
-use objc2::encode::{Encode, Encoding};
-
-use crate::platform::ios::{Idiom, ScreenEdge};
-
-#[repr(transparent)]
-#[derive(Clone, Copy, Debug, PartialEq, Eq)]
-pub struct UIUserInterfaceIdiom(NSInteger);
-
-unsafe impl Encode for UIUserInterfaceIdiom {
-    const ENCODING: Encoding = NSInteger::ENCODING;
-}
-
-impl UIUserInterfaceIdiom {
-    pub const Unspecified: UIUserInterfaceIdiom = UIUserInterfaceIdiom(-1);
-    pub const Phone: UIUserInterfaceIdiom = UIUserInterfaceIdiom(0);
-    pub const Pad: UIUserInterfaceIdiom = UIUserInterfaceIdiom(1);
-    pub const TV: UIUserInterfaceIdiom = UIUserInterfaceIdiom(2);
-    pub const CarPlay: UIUserInterfaceIdiom = UIUserInterfaceIdiom(3);
-}
-
-impl From<Idiom> for UIUserInterfaceIdiom {
-    fn from(idiom: Idiom) -> UIUserInterfaceIdiom {
-        match idiom {
-            Idiom::Unspecified => UIUserInterfaceIdiom::Unspecified,
-            Idiom::Phone => UIUserInterfaceIdiom::Phone,
-            Idiom::Pad => UIUserInterfaceIdiom::Pad,
-            Idiom::TV => UIUserInterfaceIdiom::TV,
-            Idiom::CarPlay => UIUserInterfaceIdiom::CarPlay,
-        }
-    }
-}
-impl From<UIUserInterfaceIdiom> for Idiom {
-    fn from(ui_idiom: UIUserInterfaceIdiom) -> Idiom {
-        match ui_idiom {
-            UIUserInterfaceIdiom::Unspecified => Idiom::Unspecified,
-            UIUserInterfaceIdiom::Phone => Idiom::Phone,
-            UIUserInterfaceIdiom::Pad => Idiom::Pad,
-            UIUserInterfaceIdiom::TV => Idiom::TV,
-            UIUserInterfaceIdiom::CarPlay => Idiom::CarPlay,
-            _ => unreachable!(),
-        }
-    }
-}
-
-#[repr(transparent)]
-#[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;
-}
-
-impl From<ScreenEdge> for UIRectEdge {
-    fn from(screen_edge: ScreenEdge) -> UIRectEdge {
-        assert_eq!(
-            screen_edge.bits() & !ScreenEdge::ALL.bits(),
-            0,
-            "invalid `ScreenEdge`"
-        );
-        UIRectEdge(screen_edge.bits().into())
-    }
-}
-
-impl From<UIRectEdge> for ScreenEdge {
-    fn from(ui_rect_edge: UIRectEdge) -> ScreenEdge {
-        let bits: u8 = ui_rect_edge.0.try_into().expect("invalid `UIRectEdge`");
-        ScreenEdge::from_bits(bits).expect("invalid `ScreenEdge`")
-    }
-}

src/platform_impl/ios/mod.rs

@@ -1,100 +1,46 @@
-//! iOS support
-//!
-//! # Building app
-//! To build ios app you will need rustc built for this targets:
-//!
-//!  - armv7-apple-ios
-//!  - armv7s-apple-ios
-//!  - i386-apple-ios
-//!  - aarch64-apple-ios
-//!  - x86_64-apple-ios
-//!
-//! Then
-//!
-//! ```
-//! cargo build --target=...
-//! ```
-//! The simplest way to integrate your app into xcode environment is to build it
-//! as a static library. Wrap your main function and export it.
-//!
-//! ```rust, ignore
-//! #[no_mangle]
-//! pub extern fn start_winit_app() {
-//!     start_inner()
-//! }
-//!
-//! fn start_inner() {
-//!    ...
-//! }
-//! ```
-//!
-//! Compile project and then drag resulting .a into Xcode project. Add winit.h to xcode.
-//!
-//! ```ignore
-//! void start_winit_app();
-//! ```
-//!
-//! Use start_winit_app inside your xcode's main function.
-//!
-//!
-//! # App lifecycle and events
-//!
-//! iOS environment is very different from other platforms and you must be very
-//! careful with it's events. Familiarize yourself with
-//! [app lifecycle](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIApplicationDelegate_Protocol/).
-//!
-//!
-//! This is how those event are represented in winit:
-//!
-//!  - applicationDidBecomeActive is Resumed
-//!  - applicationWillResignActive is Suspended
-//!  - applicationWillTerminate is LoopExiting
-//!
-//! Keep in mind that after LoopExiting 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.
-
 #![cfg(ios_platform)]
 #![allow(clippy::let_unit_value)]
 
+mod app_delegate;
 mod app_state;
 mod event_loop;
-mod ffi;
 mod monitor;
 mod uikit;
 mod view;
+mod view_controller;
 mod window;
 
 use std::fmt;
 
+use crate::event::DeviceId as RootDeviceId;
+
 pub(crate) use self::{
     event_loop::{
-        EventLoop, EventLoopProxy, EventLoopWindowTarget, PlatformSpecificEventLoopAttributes,
+        ActiveEventLoop, EventLoop, EventLoopProxy, OwnedDisplayHandle,
+        PlatformSpecificEventLoopAttributes,
     },
-    monitor::{MonitorHandle, VideoMode},
-    window::{PlatformSpecificWindowBuilderAttributes, Window, WindowId},
+    monitor::{MonitorHandle, VideoModeHandle},
+    window::{PlatformSpecificWindowAttributes, Window, WindowId},
 };
-
-use self::uikit::UIScreen;
+pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursor;
+pub(crate) use crate::cursor::NoCustomCursor as PlatformCustomCursorSource;
 pub(crate) use crate::icon::NoIcon as PlatformIcon;
 pub(crate) use crate::platform_impl::Fullscreen;
 
+/// There is no way to detect which device that performed a certain event in
+/// UIKit (i.e. you can't differentiate between different external keyboards,
+/// or whether it was the main touchscreen, assistive technologies, or some
+/// other pointer device that caused a touch event).
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
-pub struct DeviceId {
-    uiscreen: *const UIScreen,
-}
+pub struct DeviceId;
 
 impl DeviceId {
     pub const unsafe fn dummy() -> Self {
-        DeviceId {
-            uiscreen: std::ptr::null(),
-        }
+        DeviceId
     }
 }
 
-unsafe impl Send for DeviceId {}
-unsafe impl Sync for DeviceId {}
+pub(crate) const DEVICE_ID: RootDeviceId = RootDeviceId(DeviceId);
 
 #[derive(Debug, Clone, PartialEq, Eq, Hash)]
 pub struct KeyEventExtra {}

src/platform_impl/ios/monitor.rs

@@ -8,11 +8,12 @@ use std::{
 use icrate::Foundation::{MainThreadBound, MainThreadMarker, NSInteger};
 use objc2::mutability::IsRetainable;
 use objc2::rc::Id;
+use objc2::Message;
 
 use super::uikit::{UIScreen, UIScreenMode};
 use crate::{
     dpi::{PhysicalPosition, PhysicalSize},
-    monitor::VideoMode as RootVideoMode,
+    monitor::VideoModeHandle as RootVideoModeHandle,
     platform_impl::platform::app_state,
 };
 
@@ -20,16 +21,15 @@ use crate::{
 #[derive(Debug)]
 struct MainThreadBoundDelegateImpls<T>(MainThreadBound<Id<T>>);
 
-impl<T: IsRetainable> Clone for MainThreadBoundDelegateImpls<T> {
+impl<T: IsRetainable + Message> Clone for MainThreadBoundDelegateImpls<T> {
     fn clone(&self) -> Self {
-        Self(
-            self.0
-                .get_on_main(|inner, mtm| MainThreadBound::new(Id::clone(inner), mtm)),
-        )
+        Self(MainThreadMarker::run_on_main(|mtm| {
+            MainThreadBound::new(Id::clone(self.0.get(mtm)), mtm)
+        }))
     }
 }
 
-impl<T: IsRetainable> hash::Hash for MainThreadBoundDelegateImpls<T> {
+impl<T: IsRetainable + Message> 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() };
@@ -37,7 +37,7 @@ impl<T: IsRetainable> hash::Hash for MainThreadBoundDelegateImpls<T> {
     }
 }
 
-impl<T: IsRetainable> PartialEq for MainThreadBoundDelegateImpls<T> {
+impl<T: IsRetainable + Message> PartialEq for MainThreadBoundDelegateImpls<T> {
     fn eq(&self, other: &Self) -> bool {
         // SAFETY: Marker only used to get the pointer
         let mtm = unsafe { MainThreadMarker::new_unchecked() };
@@ -45,10 +45,10 @@ impl<T: IsRetainable> PartialEq for MainThreadBoundDelegateImpls<T> {
     }
 }
 
-impl<T: IsRetainable> Eq for MainThreadBoundDelegateImpls<T> {}
+impl<T: IsRetainable + Message> Eq for MainThreadBoundDelegateImpls<T> {}
 
 #[derive(Debug, PartialEq, Eq, Hash, Clone)]
-pub struct VideoMode {
+pub struct VideoModeHandle {
     pub(crate) size: (u32, u32),
     pub(crate) bit_depth: u16,
     pub(crate) refresh_rate_millihertz: u32,
@@ -56,15 +56,15 @@ pub struct VideoMode {
     pub(crate) monitor: MonitorHandle,
 }
 
-impl VideoMode {
+impl VideoModeHandle {
     fn new(
         uiscreen: Id<UIScreen>,
         screen_mode: Id<UIScreenMode>,
         mtm: MainThreadMarker,
-    ) -> VideoMode {
+    ) -> VideoModeHandle {
         let refresh_rate_millihertz = refresh_rate_millihertz(&uiscreen);
         let size = screen_mode.size();
-        VideoMode {
+        VideoModeHandle {
             size: (size.width as u32, size.height as u32),
             bit_depth: 32,
             refresh_rate_millihertz,
@@ -100,11 +100,9 @@ pub struct MonitorHandle {
 
 impl Clone for MonitorHandle {
     fn clone(&self) -> Self {
-        Self {
-            ui_screen: self
-                .ui_screen
-                .get_on_main(|inner, mtm| MainThreadBound::new(inner.clone(), mtm)),
-        }
+        MainThreadMarker::run_on_main(|mtm| Self {
+            ui_screen: MainThreadBound::new(self.ui_screen.get(mtm).clone(), mtm),
+        })
     }
 }
 
@@ -137,24 +135,13 @@ impl Ord for MonitorHandle {
 
 impl fmt::Debug for MonitorHandle {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        // TODO: Do this using the proper fmt API
-        #[derive(Debug)]
-        #[allow(dead_code)]
-        struct MonitorHandle {
-            name: Option<String>,
-            size: PhysicalSize<u32>,
-            position: PhysicalPosition<i32>,
-            scale_factor: f64,
-        }
-
-        let monitor_id_proxy = MonitorHandle {
-            name: self.name(),
-            size: self.size(),
-            position: self.position(),
-            scale_factor: self.scale_factor(),
-        };
-
-        monitor_id_proxy.fmt(f)
+        f.debug_struct("MonitorHandle")
+            .field("name", &self.name())
+            .field("size", &self.size())
+            .field("position", &self.position())
+            .field("scale_factor", &self.scale_factor())
+            .field("refresh_rate_millihertz", &self.refresh_rate_millihertz())
+            .finish_non_exhaustive()
     }
 }
 
@@ -168,16 +155,16 @@ impl MonitorHandle {
     }
 
     pub fn name(&self) -> Option<String> {
-        self.ui_screen.get_on_main(|ui_screen, mtm| {
+        MainThreadMarker::run_on_main(|mtm| {
             let main = UIScreen::main(mtm);
-            if *ui_screen == main {
+            if *self.ui_screen(mtm) == main {
                 Some("Primary".to_string())
-            } else if *ui_screen == main.mirroredScreen() {
+            } else if *self.ui_screen(mtm) == main.mirroredScreen() {
                 Some("Mirrored".to_string())
             } else {
                 UIScreen::screens(mtm)
                     .iter()
-                    .position(|rhs| rhs == &**ui_screen)
+                    .position(|rhs| rhs == &**self.ui_screen(mtm))
                     .map(|idx| idx.to_string())
             }
         })
@@ -186,38 +173,39 @@ impl MonitorHandle {
     pub fn size(&self) -> PhysicalSize<u32> {
         let bounds = self
             .ui_screen
-            .get_on_main(|ui_screen, _| ui_screen.nativeBounds());
+            .get_on_main(|ui_screen| ui_screen.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());
+            .get_on_main(|ui_screen| ui_screen.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
+            .get_on_main(|ui_screen| ui_screen.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)),
+                .get_on_main(|ui_screen| refresh_rate_millihertz(ui_screen)),
         )
     }
 
-    pub fn video_modes(&self) -> impl Iterator<Item = VideoMode> {
-        self.ui_screen.get_on_main(|ui_screen, mtm| {
-            // Use Ord impl of RootVideoMode
+    pub fn video_modes(&self) -> impl Iterator<Item = VideoModeHandle> {
+        MainThreadMarker::run_on_main(|mtm| {
+            let ui_screen = self.ui_screen(mtm);
+            // Use Ord impl of RootVideoModeHandle
 
             let modes: BTreeSet<_> = ui_screen
                 .availableModes()
                 .into_iter()
-                .map(|mode| RootVideoMode {
-                    video_mode: VideoMode::new(ui_screen.clone(), mode, mtm),
+                .map(|mode| RootVideoModeHandle {
+                    video_mode: VideoModeHandle::new(ui_screen.clone(), mode, mtm),
                 })
                 .collect();
 
@@ -229,9 +217,13 @@ impl MonitorHandle {
         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)
+    pub fn preferred_video_mode(&self) -> VideoModeHandle {
+        MainThreadMarker::run_on_main(|mtm| {
+            VideoModeHandle::new(
+                self.ui_screen(mtm).clone(),
+                self.ui_screen(mtm).preferredMode().unwrap(),
+                mtm,
+            )
         })
     }
 }

src/platform_impl/ios/uikit/device.rs

@@ -1,9 +1,8 @@
-use icrate::Foundation::{MainThreadMarker, NSObject};
+use icrate::Foundation::{MainThreadMarker, NSInteger, NSObject};
+use objc2::encode::{Encode, Encoding};
 use objc2::rc::Id;
 use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
 
-use super::super::ffi::UIUserInterfaceIdiom;
-
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
     pub(crate) struct UIDevice;
@@ -24,3 +23,19 @@ extern_methods!(
         pub fn userInterfaceIdiom(&self) -> UIUserInterfaceIdiom;
     }
 );
+
+#[repr(transparent)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct UIUserInterfaceIdiom(NSInteger);
+
+unsafe impl Encode for UIUserInterfaceIdiom {
+    const ENCODING: Encoding = NSInteger::ENCODING;
+}
+
+impl UIUserInterfaceIdiom {
+    pub const Unspecified: UIUserInterfaceIdiom = UIUserInterfaceIdiom(-1);
+    pub const Phone: UIUserInterfaceIdiom = UIUserInterfaceIdiom(0);
+    pub const Pad: UIUserInterfaceIdiom = UIUserInterfaceIdiom(1);
+    pub const TV: UIUserInterfaceIdiom = UIUserInterfaceIdiom(2);
+    pub const CarPlay: UIUserInterfaceIdiom = UIUserInterfaceIdiom(3);
+}

src/platform_impl/ios/uikit/geometry.rs

@@ -0,0 +1,14 @@
+use icrate::Foundation::NSUInteger;
+use objc2::encode::{Encode, Encoding};
+
+#[repr(transparent)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct UIRectEdge(pub NSUInteger);
+
+impl UIRectEdge {
+    pub const NONE: Self = Self(0);
+}
+
+unsafe impl Encode for UIRectEdge {
+    const ENCODING: Encoding = NSUInteger::ENCODING;
+}

src/platform_impl/ios/uikit/gesture_recognizer.rs

@@ -0,0 +1,121 @@
+use icrate::Foundation::{CGFloat, NSInteger, NSObject, NSUInteger};
+use objc2::{
+    encode::{Encode, Encoding},
+    extern_class, extern_methods, mutability, ClassType,
+};
+
+// https://developer.apple.com/documentation/uikit/uigesturerecognizer
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct UIGestureRecognizer;
+
+    unsafe impl ClassType for UIGestureRecognizer {
+        type Super = NSObject;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+extern_methods!(
+    unsafe impl UIGestureRecognizer {
+        #[method(state)]
+        pub fn state(&self) -> UIGestureRecognizerState;
+    }
+);
+
+unsafe impl Encode for UIGestureRecognizer {
+    const ENCODING: Encoding = Encoding::Object;
+}
+
+// https://developer.apple.com/documentation/uikit/uigesturerecognizer/state
+#[repr(transparent)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+pub struct UIGestureRecognizerState(NSInteger);
+
+unsafe impl Encode for UIGestureRecognizerState {
+    const ENCODING: Encoding = NSInteger::ENCODING;
+}
+
+#[allow(dead_code)]
+impl UIGestureRecognizerState {
+    pub const Possible: Self = Self(0);
+    pub const Began: Self = Self(1);
+    pub const Changed: Self = Self(2);
+    pub const Ended: Self = Self(3);
+    pub const Cancelled: Self = Self(4);
+    pub const Failed: Self = Self(5);
+}
+
+// https://developer.apple.com/documentation/uikit/uipinchgesturerecognizer
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct UIPinchGestureRecognizer;
+
+    unsafe impl ClassType for UIPinchGestureRecognizer {
+        type Super = UIGestureRecognizer;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+extern_methods!(
+    unsafe impl UIPinchGestureRecognizer {
+        #[method(scale)]
+        pub fn scale(&self) -> CGFloat;
+
+        #[method(velocity)]
+        pub fn velocity(&self) -> CGFloat;
+    }
+);
+
+unsafe impl Encode for UIPinchGestureRecognizer {
+    const ENCODING: Encoding = Encoding::Object;
+}
+
+// https://developer.apple.com/documentation/uikit/uirotationgesturerecognizer
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct UIRotationGestureRecognizer;
+
+    unsafe impl ClassType for UIRotationGestureRecognizer {
+        type Super = UIGestureRecognizer;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+extern_methods!(
+    unsafe impl UIRotationGestureRecognizer {
+        #[method(rotation)]
+        pub fn rotation(&self) -> CGFloat;
+
+        #[method(velocity)]
+        pub fn velocity(&self) -> CGFloat;
+    }
+);
+
+unsafe impl Encode for UIRotationGestureRecognizer {
+    const ENCODING: Encoding = Encoding::Object;
+}
+
+// https://developer.apple.com/documentation/uikit/uitapgesturerecognizer
+extern_class!(
+    #[derive(Debug, PartialEq, Eq, Hash)]
+    pub(crate) struct UITapGestureRecognizer;
+
+    unsafe impl ClassType for UITapGestureRecognizer {
+        type Super = UIGestureRecognizer;
+        type Mutability = mutability::InteriorMutable;
+    }
+);
+
+extern_methods!(
+    unsafe impl UITapGestureRecognizer {
+        #[method(setNumberOfTapsRequired:)]
+        pub fn setNumberOfTapsRequired(&self, number_of_taps_required: NSUInteger);
+
+        #[method(setNumberOfTouchesRequired:)]
+        pub fn setNumberOfTouchesRequired(&self, number_of_touches_required: NSUInteger);
+    }
+);
+
+unsafe impl Encode for UITapGestureRecognizer {
+    const ENCODING: Encoding = Encoding::Object;
+}

src/platform_impl/ios/uikit/mod.rs

@@ -9,6 +9,8 @@ mod application;
 mod coordinate_space;
 mod device;
 mod event;
+mod geometry;
+mod gesture_recognizer;
 mod responder;
 mod screen;
 mod screen_mode;
@@ -21,8 +23,13 @@ mod window;
 
 pub(crate) use self::application::UIApplication;
 pub(crate) use self::coordinate_space::UICoordinateSpace;
-pub(crate) use self::device::UIDevice;
+pub(crate) use self::device::{UIDevice, UIUserInterfaceIdiom};
 pub(crate) use self::event::UIEvent;
+pub(crate) use self::geometry::UIRectEdge;
+pub(crate) use self::gesture_recognizer::{
+    UIGestureRecognizer, UIGestureRecognizerState, UIPinchGestureRecognizer,
+    UIRotationGestureRecognizer, UITapGestureRecognizer,
+};
 pub(crate) use self::responder::UIResponder;
 pub(crate) use self::screen::{UIScreen, UIScreenOverscanCompensation};
 pub(crate) use self::screen_mode::UIScreenMode;

src/platform_impl/ios/uikit/status_bar_style.rs

@@ -1,4 +1,3 @@
-use crate::platform::ios::StatusBarStyle;
 use icrate::Foundation::NSInteger;
 use objc2::encode::{Encode, Encoding};
 
@@ -12,16 +11,6 @@ pub enum UIStatusBarStyle {
     DarkContent = 3,
 }
 
-impl From<StatusBarStyle> for UIStatusBarStyle {
-    fn from(value: StatusBarStyle) -> Self {
-        match value {
-            StatusBarStyle::Default => Self::Default,
-            StatusBarStyle::LightContent => Self::LightContent,
-            StatusBarStyle::DarkContent => Self::DarkContent,
-        }
-    }
-}
-
 unsafe impl Encode for UIStatusBarStyle {
     const ENCODING: Encoding = NSInteger::ENCODING;
 }

src/platform_impl/ios/uikit/view.rs

@@ -3,7 +3,7 @@ use objc2::encode::{Encode, Encoding};
 use objc2::rc::Id;
 use objc2::{extern_class, extern_methods, msg_send_id, mutability, ClassType};
 
-use super::{UICoordinateSpace, UIResponder, UIViewController};
+use super::{UICoordinateSpace, UIGestureRecognizer, UIResponder, UIViewController};
 
 extern_class!(
     #[derive(Debug, PartialEq, Eq, Hash)]
@@ -65,6 +65,12 @@ extern_methods!(
 
         #[method(setNeedsDisplay)]
         pub fn setNeedsDisplay(&self);
+
+        #[method(addGestureRecognizer:)]
+        pub fn addGestureRecognizer(&self, gestureRecognizer: &UIGestureRecognizer);
+
+        #[method(removeGestureRecognizer:)]
+        pub fn removeGestureRecognizer(&self, gestureRecognizer: &UIGestureRecognizer);
     }
 );
 

src/platform_impl/ios/uikit/view_controller.rs

@@ -39,7 +39,7 @@ extern_methods!(
     }
 );
 
-bitflags! {
+bitflags::bitflags! {
     #[derive(Clone, Copy)]
     pub struct UIInterfaceOrientationMask: NSUInteger {
         const Portrait = 1 << 1;

src/platform_impl/ios/view.rs

@@ -1,32 +1,33 @@
 #![allow(clippy::unnecessary_cast)]
-use std::cell::Cell;
-use std::ptr::NonNull;
+use std::cell::RefCell;
 
-use icrate::Foundation::{CGFloat, CGRect, MainThreadMarker, NSObject, NSObjectProtocol, NSSet};
-use objc2::declare::{Ivar, IvarDrop};
+use icrate::Foundation::{CGFloat, CGRect, MainThreadMarker, NSObject, NSSet};
 use objc2::rc::Id;
 use objc2::runtime::AnyClass;
-use objc2::{declare_class, extern_methods, msg_send, msg_send_id, mutability, ClassType};
+use objc2::{
+    declare_class, extern_methods, msg_send, msg_send_id, mutability, sel, ClassType, DeclaredClass,
+};
 
 use super::app_state::{self, EventWrapper};
 use super::uikit::{
-    UIApplication, UIDevice, UIEvent, UIForceTouchCapability, UIInterfaceOrientationMask,
-    UIResponder, UIStatusBarStyle, UITouch, UITouchPhase, UITouchType, UITraitCollection, UIView,
-    UIViewController, UIWindow,
+    UIEvent, UIForceTouchCapability, UIGestureRecognizerState, UIPinchGestureRecognizer,
+    UIResponder, UIRotationGestureRecognizer, UITapGestureRecognizer, UITouch, UITouchPhase,
+    UITouchType, UITraitCollection, UIView,
 };
-use super::window::WindowId;
+use super::window::WinitUIWindow;
 use crate::{
     dpi::PhysicalPosition,
-    event::{DeviceId as RootDeviceId, Event, Force, Touch, TouchPhase, WindowEvent},
-    platform::ios::ValidOrientations,
-    platform_impl::platform::{
-        ffi::{UIRectEdge, UIUserInterfaceIdiom},
-        window::PlatformSpecificWindowBuilderAttributes,
-        DeviceId, Fullscreen,
-    },
+    event::{Event, Force, Touch, TouchPhase, WindowEvent},
+    platform_impl::platform::DEVICE_ID,
     window::{WindowAttributes, WindowId as RootWindowId},
 };
 
+pub struct WinitViewState {
+    pinch_gesture_recognizer: RefCell<Option<Id<UIPinchGestureRecognizer>>>,
+    doubletap_gesture_recognizer: RefCell<Option<Id<UITapGestureRecognizer>>>,
+    rotation_gesture_recognizer: RefCell<Option<Id<UIRotationGestureRecognizer>>>,
+}
+
 declare_class!(
     pub(crate) struct WinitView;
 
@@ -37,6 +38,10 @@ declare_class!(
         const NAME: &'static str = "WinitUIView";
     }
 
+    impl DeclaredClass for WinitView {
+        type Ivars = WinitViewState;
+    }
+
     unsafe impl WinitView {
         #[method(drawRect:)]
         fn draw_rect(&self, rect: CGRect) {
@@ -157,6 +162,79 @@ declare_class!(
         fn touches_cancelled(&self, touches: &NSSet<UITouch>, _event: Option<&UIEvent>) {
             self.handle_touches(touches)
         }
+
+        #[method(pinchGesture:)]
+        fn pinch_gesture(&self, recognizer: &UIPinchGestureRecognizer) {
+            let window = self.window().unwrap();
+
+            let phase = match recognizer.state() {
+                UIGestureRecognizerState::Began => TouchPhase::Started,
+                UIGestureRecognizerState::Changed => TouchPhase::Moved,
+                UIGestureRecognizerState::Ended => TouchPhase::Ended,
+                UIGestureRecognizerState::Cancelled | UIGestureRecognizerState::Failed => {
+                    TouchPhase::Cancelled
+                }
+                state => panic!("unexpected recognizer state: {:?}", state),
+            };
+
+            let gesture_event = EventWrapper::StaticEvent(Event::WindowEvent {
+                window_id: RootWindowId(window.id()),
+                event: WindowEvent::PinchGesture {
+                    device_id: DEVICE_ID,
+                    delta: recognizer.velocity() as _,
+                    phase,
+                },
+            });
+
+            let mtm = MainThreadMarker::new().unwrap();
+            app_state::handle_nonuser_event(mtm, gesture_event);
+        }
+
+        #[method(doubleTapGesture:)]
+        fn double_tap_gesture(&self, recognizer: &UITapGestureRecognizer) {
+            let window = self.window().unwrap();
+
+            if recognizer.state() == UIGestureRecognizerState::Ended {
+                let gesture_event = EventWrapper::StaticEvent(Event::WindowEvent {
+                    window_id: RootWindowId(window.id()),
+                    event: WindowEvent::DoubleTapGesture {
+                        device_id: DEVICE_ID,
+                    },
+                });
+
+                let mtm = MainThreadMarker::new().unwrap();
+                app_state::handle_nonuser_event(mtm, gesture_event);
+            }
+        }
+
+        #[method(rotationGesture:)]
+        fn rotation_gesture(&self, recognizer: &UIRotationGestureRecognizer) {
+            let window = self.window().unwrap();
+
+            let phase = match recognizer.state() {
+                UIGestureRecognizerState::Began => TouchPhase::Started,
+                UIGestureRecognizerState::Changed => TouchPhase::Moved,
+                UIGestureRecognizerState::Ended => TouchPhase::Ended,
+                UIGestureRecognizerState::Cancelled | UIGestureRecognizerState::Failed => {
+                    TouchPhase::Cancelled
+                }
+                state => panic!("unexpected recognizer state: {:?}", state),
+            };
+
+            // Flip the velocity to match macOS.
+            let delta = -recognizer.velocity() as _;
+            let gesture_event = EventWrapper::StaticEvent(Event::WindowEvent {
+                window_id: RootWindowId(window.id()),
+                event: WindowEvent::RotationGesture {
+                    device_id: DEVICE_ID,
+                    delta,
+                    phase,
+                },
+            });
+
+            let mtm = MainThreadMarker::new().unwrap();
+            app_state::handle_nonuser_event(mtm, gesture_event);
+        }
     }
 );
 
@@ -180,24 +258,73 @@ extern_methods!(
 impl WinitView {
     pub(crate) fn new(
         _mtm: MainThreadMarker,
-        _window_attributes: &WindowAttributes,
-        platform_attributes: &PlatformSpecificWindowBuilderAttributes,
+        window_attributes: &WindowAttributes,
         frame: CGRect,
     ) -> Id<Self> {
-        let this: Id<Self> = unsafe { msg_send_id![Self::alloc(), initWithFrame: frame] };
+        let this = Self::alloc().set_ivars(WinitViewState {
+            pinch_gesture_recognizer: RefCell::new(None),
+            doubletap_gesture_recognizer: RefCell::new(None),
+            rotation_gesture_recognizer: RefCell::new(None),
+        });
+        let this: Id<Self> = unsafe { msg_send_id![super(this), initWithFrame: frame] };
 
         this.setMultipleTouchEnabled(true);
 
-        if let Some(scale_factor) = platform_attributes.scale_factor {
+        if let Some(scale_factor) = window_attributes.platform_specific.scale_factor {
             this.setContentScaleFactor(scale_factor as _);
         }
 
         this
     }
 
+    pub(crate) fn recognize_pinch_gesture(&self, should_recognize: bool) {
+        if should_recognize {
+            if self.ivars().pinch_gesture_recognizer.borrow().is_none() {
+                let pinch: Id<UIPinchGestureRecognizer> = unsafe {
+                    msg_send_id![UIPinchGestureRecognizer::alloc(), initWithTarget: self, action: sel!(pinchGesture:)]
+                };
+                self.addGestureRecognizer(&pinch);
+                self.ivars().pinch_gesture_recognizer.replace(Some(pinch));
+            }
+        } else if let Some(recognizer) = self.ivars().pinch_gesture_recognizer.take() {
+            self.removeGestureRecognizer(&recognizer);
+        }
+    }
+
+    pub(crate) fn recognize_doubletap_gesture(&self, should_recognize: bool) {
+        if should_recognize {
+            if self.ivars().doubletap_gesture_recognizer.borrow().is_none() {
+                let tap: Id<UITapGestureRecognizer> = unsafe {
+                    msg_send_id![UITapGestureRecognizer::alloc(), initWithTarget: self, action: sel!(doubleTapGesture:)]
+                };
+                tap.setNumberOfTapsRequired(2);
+                tap.setNumberOfTouchesRequired(1);
+                self.addGestureRecognizer(&tap);
+                self.ivars().doubletap_gesture_recognizer.replace(Some(tap));
+            }
+        } else if let Some(recognizer) = self.ivars().doubletap_gesture_recognizer.take() {
+            self.removeGestureRecognizer(&recognizer);
+        }
+    }
+
+    pub(crate) fn recognize_rotation_gesture(&self, should_recognize: bool) {
+        if should_recognize {
+            if self.ivars().rotation_gesture_recognizer.borrow().is_none() {
+                let rotation: Id<UIRotationGestureRecognizer> = unsafe {
+                    msg_send_id![UIRotationGestureRecognizer::alloc(), initWithTarget: self, action: sel!(rotationGesture:)]
+                };
+                self.addGestureRecognizer(&rotation);
+                self.ivars()
+                    .rotation_gesture_recognizer
+                    .replace(Some(rotation));
+            }
+        } else if let Some(recognizer) = self.ivars().rotation_gesture_recognizer.take() {
+            self.removeGestureRecognizer(&recognizer);
+        }
+    }
+
     fn handle_touches(&self, touches: &NSSet<UITouch>) {
         let window = self.window().unwrap();
-        let uiscreen = window.screen();
         let mut touch_events = Vec::new();
         let os_supports_force = app_state::os_capabilities().force_touch;
         for touch in touches {
@@ -250,9 +377,7 @@ impl WinitView {
             touch_events.push(EventWrapper::StaticEvent(Event::WindowEvent {
                 window_id: RootWindowId(window.id()),
                 event: WindowEvent::Touch(Touch {
-                    device_id: RootDeviceId(DeviceId {
-                        uiscreen: Id::as_ptr(&uiscreen),
-                    }),
+                    device_id: DEVICE_ID,
                     id: touch_id,
                     location: physical_location,
                     force,
@@ -264,338 +389,3 @@ impl WinitView {
         app_state::handle_nonuser_events(mtm, touch_events);
     }
 }
-
-pub struct ViewControllerState {
-    prefers_status_bar_hidden: Cell<bool>,
-    preferred_status_bar_style: Cell<UIStatusBarStyle>,
-    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">,
-    }
-
-    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),
-                        preferred_status_bar_style: Cell::new(UIStatusBarStyle::Default),
-                        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)
-            })
-        }
-    }
-
-    unsafe impl WinitViewController {
-        #[method(shouldAutorotate)]
-        fn should_autorotate(&self) -> bool {
-            true
-        }
-
-        #[method(prefersStatusBarHidden)]
-        fn prefers_status_bar_hidden(&self) -> bool {
-            self.state.prefers_status_bar_hidden.get()
-        }
-
-        #[method(preferredStatusBarStyle)]
-        fn preferred_status_bar_style(&self) -> UIStatusBarStyle {
-            self.state.preferred_status_bar_style.get()
-        }
-
-        #[method(prefersHomeIndicatorAutoHidden)]
-        fn prefers_home_indicator_auto_hidden(&self) -> bool {
-            self.state.prefers_home_indicator_auto_hidden.get()
-        }
-
-        #[method(supportedInterfaceOrientations)]
-        fn supported_orientations(&self) -> UIInterfaceOrientationMask {
-            self.state.supported_orientations.get()
-        }
-
-        #[method(preferredScreenEdgesDeferringSystemGestures)]
-        fn preferred_screen_edges_deferring_system_gestures(&self) -> UIRectEdge {
-            self.state
-                .preferred_screen_edges_deferring_system_gestures
-                .get()
-        }
-    }
-);
-
-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_preferred_status_bar_style(&self, val: UIStatusBarStyle) {
-        self.state.preferred_status_bar_style.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,
-        valid_orientations: ValidOrientations,
-    ) {
-        let mask = match (
-            valid_orientations,
-            UIDevice::current(mtm).userInterfaceIdiom(),
-        ) {
-            (ValidOrientations::LandscapeAndPortrait, UIUserInterfaceIdiom::Phone) => {
-                UIInterfaceOrientationMask::AllButUpsideDown
-            }
-            (ValidOrientations::LandscapeAndPortrait, _) => UIInterfaceOrientationMask::All,
-            (ValidOrientations::Landscape, _) => UIInterfaceOrientationMask::Landscape,
-            (ValidOrientations::Portrait, UIUserInterfaceIdiom::Phone) => {
-                UIInterfaceOrientationMask::Portrait
-            }
-            (ValidOrientations::Portrait, _) => {
-                UIInterfaceOrientationMask::Portrait
-                    | UIInterfaceOrientationMask::PortraitUpsideDown
-            }
-        };
-        self.state.supported_orientations.set(mask);
-        UIViewController::attemptRotationToDeviceOrientation();
-    }
-
-    pub(crate) fn new(
-        mtm: MainThreadMarker,
-        _window_attributes: &WindowAttributes,
-        platform_attributes: &PlatformSpecificWindowBuilderAttributes,
-        view: &UIView,
-    ) -> Id<Self> {
-        let this: Id<Self> = unsafe { msg_send_id![Self::alloc(), init] };
-
-        this.set_prefers_status_bar_hidden(platform_attributes.prefers_status_bar_hidden);
-
-        this.set_preferred_status_bar_style(platform_attributes.preferred_status_bar_style.into());
-
-        this.set_supported_interface_orientations(mtm, platform_attributes.valid_orientations);
-
-        this.set_prefers_home_indicator_auto_hidden(
-            platform_attributes.prefers_home_indicator_hidden,
-        );
-
-        this.set_preferred_screen_edges_deferring_system_gestures(
-            platform_attributes
-                .preferred_screen_edges_deferring_system_gestures
-                .into(),
-        );
-
-        this.setView(Some(view));
-
-        this
-    }
-}
-
-declare_class!(
-    #[derive(Debug, PartialEq, Eq, Hash)]
-    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)]
-        fn become_key_window(&self) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(
-                mtm,
-                EventWrapper::StaticEvent(Event::WindowEvent {
-                    window_id: RootWindowId(self.id()),
-                    event: WindowEvent::Focused(true),
-                }),
-            );
-            let _: () = unsafe { msg_send![super(self), becomeKeyWindow] };
-        }
-
-        #[method(resignKeyWindow)]
-        fn resign_key_window(&self) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(
-                mtm,
-                EventWrapper::StaticEvent(Event::WindowEvent {
-                    window_id: RootWindowId(self.id()),
-                    event: WindowEvent::Focused(false),
-                }),
-            );
-            let _: () = unsafe { msg_send![super(self), resignKeyWindow] };
-        }
-    }
-);
-
-impl WinitUIWindow {
-    pub(crate) fn new(
-        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] };
-
-        this.setRootViewController(Some(view_controller));
-
-        match window_attributes.fullscreen.0.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)));
-                this.setScreen(screen);
-            }
-            Some(Fullscreen::Borderless(Some(ref monitor))) => {
-                let screen = monitor.ui_screen(mtm);
-                this.setScreen(screen);
-            }
-            _ => (),
-        }
-
-        this
-    }
-
-    pub(crate) fn id(&self) -> WindowId {
-        (self as *const Self as usize as u64).into()
-    }
-}
-
-declare_class!(
-    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:)]
-        fn did_finish_launching(&self, _application: &UIApplication, _: *mut NSObject) -> bool {
-            app_state::did_finish_launching(MainThreadMarker::new().unwrap());
-            true
-        }
-
-        #[method(applicationDidBecomeActive:)]
-        fn did_become_active(&self, _application: &UIApplication) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::Resumed))
-        }
-
-        #[method(applicationWillResignActive:)]
-        fn will_resign_active(&self, _application: &UIApplication) {
-            let mtm = MainThreadMarker::new().unwrap();
-            app_state::handle_nonuser_event(mtm, EventWrapper::StaticEvent(Event::Suspended))
-        }
-
-        #[method(applicationWillEnterForeground:)]
-        fn will_enter_foreground(&self, application: &UIApplication) {
-            self.send_occluded_event_for_all_windows(application, false);
-        }
-
-        #[method(applicationDidEnterBackground:)]
-        fn did_enter_background(&self, application: &UIApplication) {
-            self.send_occluded_event_for_all_windows(application, true);
-        }
-
-        #[method(applicationWillTerminate:)]
-        fn will_terminate(&self, application: &UIApplication) {
-            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::Destroyed,
-                    }));
-                }
-            }
-            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))
-        }
-    }
-);
-
-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/view_controller.rs

@@ -0,0 +1,192 @@
+use std::cell::Cell;
+
+use icrate::Foundation::{MainThreadMarker, NSObject};
+use objc2::rc::Id;
+use objc2::{declare_class, msg_send_id, mutability, ClassType, DeclaredClass};
+
+use super::app_state::{self};
+use super::uikit::{
+    UIDevice, UIInterfaceOrientationMask, UIRectEdge, UIResponder, UIStatusBarStyle,
+    UIUserInterfaceIdiom, UIView, UIViewController,
+};
+use crate::platform::ios::{ScreenEdge, StatusBarStyle};
+use crate::{platform::ios::ValidOrientations, window::WindowAttributes};
+
+pub struct ViewControllerState {
+    prefers_status_bar_hidden: Cell<bool>,
+    preferred_status_bar_style: Cell<UIStatusBarStyle>,
+    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;
+
+    unsafe impl ClassType for WinitViewController {
+        #[inherits(UIResponder, NSObject)]
+        type Super = UIViewController;
+        type Mutability = mutability::InteriorMutable;
+        const NAME: &'static str = "WinitUIViewController";
+    }
+
+    impl DeclaredClass for WinitViewController {
+        type Ivars = ViewControllerState;
+    }
+
+    unsafe impl WinitViewController {
+        #[method(shouldAutorotate)]
+        fn should_autorotate(&self) -> bool {
+            true
+        }
+
+        #[method(prefersStatusBarHidden)]
+        fn prefers_status_bar_hidden(&self) -> bool {
+            self.ivars().prefers_status_bar_hidden.get()
+        }
+
+        #[method(preferredStatusBarStyle)]
+        fn preferred_status_bar_style(&self) -> UIStatusBarStyle {
+            self.ivars().preferred_status_bar_style.get()
+        }
+
+        #[method(prefersHomeIndicatorAutoHidden)]
+        fn prefers_home_indicator_auto_hidden(&self) -> bool {
+            self.ivars().prefers_home_indicator_auto_hidden.get()
+        }
+
+        #[method(supportedInterfaceOrientations)]
+        fn supported_orientations(&self) -> UIInterfaceOrientationMask {
+            self.ivars().supported_orientations.get()
+        }
+
+        #[method(preferredScreenEdgesDeferringSystemGestures)]
+        fn preferred_screen_edges_deferring_system_gestures(&self) -> UIRectEdge {
+            self.ivars()
+                .preferred_screen_edges_deferring_system_gestures
+                .get()
+        }
+    }
+);
+
+impl WinitViewController {
+    pub(crate) fn set_prefers_status_bar_hidden(&self, val: bool) {
+        self.ivars().prefers_status_bar_hidden.set(val);
+        self.setNeedsStatusBarAppearanceUpdate();
+    }
+
+    pub(crate) fn set_preferred_status_bar_style(&self, val: StatusBarStyle) {
+        let val = match val {
+            StatusBarStyle::Default => UIStatusBarStyle::Default,
+            StatusBarStyle::LightContent => UIStatusBarStyle::LightContent,
+            StatusBarStyle::DarkContent => UIStatusBarStyle::DarkContent,
+        };
+        self.ivars().preferred_status_bar_style.set(val);
+        self.setNeedsStatusBarAppearanceUpdate();
+    }
+
+    pub(crate) fn set_prefers_home_indicator_auto_hidden(&self, val: bool) {
+        self.ivars().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: ScreenEdge) {
+        let val = {
+            assert_eq!(
+                val.bits() & !ScreenEdge::ALL.bits(),
+                0,
+                "invalid `ScreenEdge`"
+            );
+            UIRectEdge(val.bits().into())
+        };
+        self.ivars()
+            .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,
+        valid_orientations: ValidOrientations,
+    ) {
+        let mask = match (
+            valid_orientations,
+            UIDevice::current(mtm).userInterfaceIdiom(),
+        ) {
+            (ValidOrientations::LandscapeAndPortrait, UIUserInterfaceIdiom::Phone) => {
+                UIInterfaceOrientationMask::AllButUpsideDown
+            }
+            (ValidOrientations::LandscapeAndPortrait, _) => UIInterfaceOrientationMask::All,
+            (ValidOrientations::Landscape, _) => UIInterfaceOrientationMask::Landscape,
+            (ValidOrientations::Portrait, UIUserInterfaceIdiom::Phone) => {
+                UIInterfaceOrientationMask::Portrait
+            }
+            (ValidOrientations::Portrait, _) => {
+                UIInterfaceOrientationMask::Portrait
+                    | UIInterfaceOrientationMask::PortraitUpsideDown
+            }
+        };
+        self.ivars().supported_orientations.set(mask);
+        UIViewController::attemptRotationToDeviceOrientation();
+    }
+
+    pub(crate) fn new(
+        mtm: MainThreadMarker,
+        window_attributes: &WindowAttributes,
+        view: &UIView,
+    ) -> Id<Self> {
+        // These are set properly below, we just to set them to something in the meantime.
+        let this = Self::alloc().set_ivars(ViewControllerState {
+            prefers_status_bar_hidden: Cell::new(false),
+            preferred_status_bar_style: Cell::new(UIStatusBarStyle::Default),
+            prefers_home_indicator_auto_hidden: Cell::new(false),
+            supported_orientations: Cell::new(UIInterfaceOrientationMask::All),
+            preferred_screen_edges_deferring_system_gestures: Cell::new(UIRectEdge::NONE),
+        });
+        let this: Id<Self> = unsafe { msg_send_id![super(this), init] };
+
+        this.set_prefers_status_bar_hidden(
+            window_attributes
+                .platform_specific
+                .prefers_status_bar_hidden,
+        );
+
+        this.set_preferred_status_bar_style(
+            window_attributes
+                .platform_specific
+                .preferred_status_bar_style,
+        );
+
+        this.set_supported_interface_orientations(
+            mtm,
+            window_attributes.platform_specific.valid_orientations,
+        );
+
+        this.set_prefers_home_indicator_auto_hidden(
+            window_attributes
+                .platform_specific
+                .prefers_home_indicator_hidden,
+        );
+
+        this.set_preferred_screen_edges_deferring_system_gestures(
+            window_attributes
+                .platform_specific
+                .preferred_screen_edges_deferring_system_gestures,
+        );
+
+        this.setView(Some(view));
+
+        this
+    }
+}