version 0.18.0 (#680)

* version 0.18.0

* Changelog: F16-F24 support was a breaking change

* fix version in README

* bump image dep

* Updated release date

.travis.yml

@@ -65,8 +65,12 @@ install:
 
 script:
   - cargo build --target $TARGET --verbose
+  - cargo build --target $TARGET --features serde --verbose
+  - cargo build --target $TARGET --features icon_loading --verbose
   # Running iOS apps on OSX requires the simulator so we skip that for now
   - if [ "$TARGET" != "x86_64-apple-ios" ]; then cargo test --target $TARGET --verbose; fi
+  - if [ "$TARGET" != "x86_64-apple-ios" ]; then cargo test --target $TARGET --features serde --verbose; fi
+  - if [ "$TARGET" != "x86_64-apple-ios" ]; then cargo test --target $TARGET --features icon_loading --verbose; fi
 
 after_success:
   - |

CHANGELOG.md

@@ -1,5 +1,59 @@
 # Unreleased
 
+# Version 0.18.0 (2018-11-07)
+
+- **Breaking:** `image` crate upgraded to 0.20. This is exposed as part of the `icon_loading` API.
+- On Wayland, pointer events will now provide the current modifiers state.
+- On Wayland, titles will now be displayed in the window header decoration.
+- On Wayland, key repetition is now ended when keyboard loses focus.
+- On Wayland, windows will now use more stylish and modern client side decorations.
+- On Wayland, windows will use server-side decorations when available.
+- **Breaking:** Added support for F16-F24 keys (variants were added to the `VirtualKeyCode` enum).
+- Fixed graphical glitches when resizing on Wayland.
+- On Windows, fix freezes when performing certain actions after a window resize has been triggered. Reintroduces some visual artifacts when resizing.
+- Updated window manager hints under X11 to v1.5 of [Extended Window Manager Hints](https://specifications.freedesktop.org/wm-spec/wm-spec-1.5.html#idm140200472629520).
+- Added `WindowBuilderExt::with_gtk_theme_variant` to X11-specific `WindowBuilder` functions.
+- Fixed UTF8 handling bug in X11 `set_title` function.
+- On Windows, `Window::set_cursor` now applies immediately instead of requiring specific events to occur first.
+- On Windows, the `HoveredFile` and `HoveredFileCancelled` events are now implemented.
+- On Windows, fix `Window::set_maximized`.
+- On Windows 10, fix transparency (#260).
+- On macOS, fix modifiers during key repeat.
+- Implemented the `Debug` trait for `Window`, `EventsLoop`, `EventsLoopProxy` and `WindowBuilder`.
+- On X11, now a `Resized` event will always be generated after a DPI change to ensure the window's logical size is consistent with the new DPI.
+- Added further clarifications to the DPI docs.
+- On Linux, if neither X11 nor Wayland manage to initialize, the corresponding panic now consists of a single line only.
+- Add optional `serde` feature with implementations of `Serialize`/`Deserialize` for DPI types and various event types.
+- Add `PartialEq`, `Eq`, and `Hash` implementations on public types that could have them but were missing them.
+- On X11, drag-and-drop receiving an unsupported drop type can no longer cause the WM to freeze.
+- Fix issue whereby the OpenGL context would not appear at startup on macOS Mojave (#1069).
+- **Breaking:** Removed `From<NSApplicationActivationPolicy>` impl from `ActivationPolicy` on macOS.
+- On macOS, the application can request the user's attention with `WindowExt::request_user_attention`.
+
+# Version 0.17.2 (2018-08-19)
+
+- On macOS, fix `<C-Tab>` so applications receive the event.
+- On macOS, fix `<Cmd-{key}>` so applications receive the event.
+- On Wayland, key press events will now be repeated.
+
+# Version 0.17.1 (2018-08-05)
+
+- On X11, prevent a compilation failure in release mode for versions of Rust greater than or equal to 1.30.
+- Fixed deadlock that broke fullscreen mode on Windows.
+
+# Version 0.17.0 (2018-08-02)
+
+- Cocoa and core-graphics updates.
+- Fixed thread-safety issues in several `Window` functions on Windows.
+- On MacOS, the key state for modifiers key events is now properly set.
+- On iOS, the view is now set correctly. This makes it possible to render things (instead of being stuck on a black screen), and touch events work again.
+- Added NetBSD support.
+- **Breaking:** On iOS, `UIView` is now the default root view. `WindowBuilderExt::with_root_view_class` can be used to set the root view objective-c class to `GLKView` (OpenGLES) or `MTKView` (Metal/MoltenVK).
+- On iOS, the `UIApplication` is not started until `Window::new` is called.
+- Fixed thread unsafety with cursor hiding on macOS.
+- On iOS, fixed the size of the `JmpBuf` type used for `setjmp`/`longjmp` calls. Previously this was a buffer overflow on most architectures.
+- On Windows, use cached window DPI instead of repeatedly querying the system. This fixes sporadic crashes on Windows 7.
+
 # Version 0.16.2 (2018-07-07)
 
 - On Windows, non-resizable windows now have the maximization button disabled. This is consistent with behavior on macOS and popular X11 WMs.

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 name = "winit"
-version = "0.16.2"
-authors = ["The winit contributors, Pierre Krieger <pierre.krieger1708@gmail.com>"]
+version = "0.18.0"
+authors = ["The winit contributors", "Pierre Krieger <pierre.krieger1708@gmail.com>"]
 description = "Cross-platform window creation library."
 keywords = ["windowing"]
 license = "Apache-2.0"
@@ -11,7 +11,7 @@ documentation = "https://docs.rs/winit"
 categories = ["gui"]
 
 [package.metadata.docs.rs]
-features = ["icon_loading"]
+features = ["icon_loading", "serde"]
 
 [features]
 icon_loading = ["image"]
@@ -20,42 +20,47 @@ icon_loading = ["image"]
 lazy_static = "1"
 libc = "0.2"
 log = "0.4"
-image = { version = "0.19", optional = true }
+image = { version = "0.20.1", optional = true }
+serde = { version = "1", optional = true, features = ["serde_derive"] }
 
 [target.'cfg(target_os = "android")'.dependencies.android_glue]
 version = "0.2"
 
 [target.'cfg(target_os = "ios")'.dependencies]
-objc = "0.2"
+objc = "0.2.3"
 
 [target.'cfg(target_os = "macos")'.dependencies]
-objc = "0.2"
-cocoa = "0.15"
+objc = "0.2.3"
+cocoa = "0.18.4"
 core-foundation = "0.6"
-core-graphics = "0.14"
+core-graphics = "0.17.3"
 
 [target.'cfg(target_os = "windows")'.dependencies.winapi]
-version = "0.3.5"
+version = "0.3.6"
 features = [
     "combaseapi",
     "dwmapi",
+    "errhandlingapi",
     "hidusage",
     "libloaderapi",
     "objbase",
+    "ole2",
     "processthreadsapi",
     "shellapi",
     "shellscalingapi",
     "shobjidl_core",
     "unknwnbase",
+    "winbase",
     "windowsx",
+    "winerror",
     "wingdi",
     "winnt",
     "winuser",
 ]
 
-[target.'cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))'.dependencies]
-wayland-client = { version = "0.20.6", features = [ "dlopen", "egl", "cursor"] }
-smithay-client-toolkit = "0.2.2"
-x11-dl = "2.17.5"
+[target.'cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd", target_os = "netbsd"))'.dependencies]
+wayland-client = { version = "0.21", features = [ "dlopen", "egl", "cursor"] }
+smithay-client-toolkit = "0.4"
+x11-dl = "2.18.3"
 parking_lot = "0.6"
 percent-encoding = "1.0"

README.md

@@ -1,15 +1,13 @@
 # winit - Cross-platform window creation and management in Rust
 
 [![](http://meritbadge.herokuapp.com/winit)](https://crates.io/crates/winit)
-
 [![Docs.rs](https://docs.rs/winit/badge.svg)](https://docs.rs/winit)
-
 [![Build Status](https://travis-ci.org/tomaka/winit.svg?branch=master)](https://travis-ci.org/tomaka/winit)
 [![Build status](https://ci.appveyor.com/api/projects/status/5h87hj0g4q2xe3j9/branch/master?svg=true)](https://ci.appveyor.com/project/tomaka/winit/branch/master)
 
 ```toml
 [dependencies]
-winit = "0.16"
+winit = "0.18"
 ```
 
 ## [Documentation](https://docs.rs/winit)
@@ -43,6 +41,12 @@ fn main() {
 }
 ```
 
+### Cargo Features
+
+Winit provides the following features, which can be enabled in your `Cargo.toml` file:
+* `icon_loading`: Enables loading window icons directly from files. Depends on the [`image` crate](https://crates.io/crates/image).
+* `serde`: Enables serialization/deserialization of certain types with [Serde](https://crates.io/crates/serde).
+
 ### Platform-specific usage
 
 #### Emscripten and WebAssembly

appveyor.yml

@@ -22,3 +22,5 @@ build: false
 
 test_script:
   - cargo test --verbose
+  - cargo test --features serde --verbose
+  - cargo test --features icon_loading --verbose

examples/window_icon.rs

@@ -6,10 +6,9 @@ extern crate winit;
 #[cfg(feature = "icon_loading")]
 extern crate image;
 
-use winit::Icon;
-
 #[cfg(feature = "icon_loading")]
 fn main() {
+    use winit::Icon;
     // 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
@@ -37,7 +36,7 @@ fn main() {
             match event {
                 CloseRequested => return winit::ControlFlow::Break,
                 DroppedFile(path) => {
-                    use image::GenericImage;
+                    use image::GenericImageView;
 
                     let icon_image = image::open(path).expect("Failed to open window icon");
 

src/dpi.rs

@@ -19,19 +19,29 @@
 //! small.
 //!
 //! That's a description of what happens when the button is 100x100 *physical* pixels. Instead, let's try using 100x100
-//! *logical* pixels. To map logical pixels to physical pixels, we simply multiply by the DPI (dots per inch) factor. 
-//! On a "typical" desktop display, the DPI factor will be 1.0, so 100x100 logical pixels equates to 100x100 physical 
-//! pixels. However, a 1440p display may have a DPI factor of 1.25, so the button is rendered as 125x125 physical pixels. 
+//! *logical* pixels. To map logical pixels to physical pixels, we simply multiply by the DPI (dots per inch) factor.
+//! On a "typical" desktop display, the DPI factor will be 1.0, so 100x100 logical pixels equates to 100x100 physical
+//! pixels. However, a 1440p display may have a DPI factor of 1.25, so the button is rendered as 125x125 physical pixels.
 //! Ideally, the button now has approximately the same perceived size across varying displays.
 //!
 //! Failure to account for the DPI factor can create a badly degraded user experience. Most notably, it can make users
 //! feel like they have bad eyesight, which will potentially cause them to think about growing elderly, resulting in
 //! them entering an existential panic. Once users enter that state, they will no longer be focused on your application.
 //!
-//! There are two ways to get the DPI factor: either by calling
-//! [`MonitorId::get_hidpi_factor`](../struct.MonitorId.html#method.get_hidpi_factor), or
-//! [`Window::get_hidpi_factor`](../struct.Window.html#method.get_hidpi_factor). You'll almost always use the latter,
-//! which is basically equivalent to `window.get_current_monitor().get_hidpi_factor()` anyway.
+//! There are two ways to get the DPI factor:
+//! - You can track the [`HiDpiFactorChanged`](../enum.WindowEvent.html#variant.HiDpiFactorChanged) event of your
+//!   windows. This event is sent any time the DPI factor changes, either because the window moved to another monitor,
+//!   or because the user changed the configuration of their screen.
+//! - You can also retrieve the DPI factor of a monitor by calling
+//!   [`MonitorId::get_hidpi_factor`](../struct.MonitorId.html#method.get_hidpi_factor), or the
+//!   current DPI factor applied to a window by calling
+//!   [`Window::get_hidpi_factor`](../struct.Window.html#method.get_hidpi_factor), which is roughly equivalent
+//!   to `window.get_current_monitor().get_hidpi_factor()`.
+//!
+//! Depending on the platform, the window's actual DPI factor may only be known after
+//! the event loop has started and your window has been drawn once. To properly handle these cases,
+//! the most robust way is to monitor the [`HiDpiFactorChanged`](../enum.WindowEvent.html#variant.HiDpiFactorChanged)
+//! event and dynamically adapt your drawing logic to follow the DPI factor.
 //!
 //! Here's an overview of what sort of DPI factors you can expect, and where they come from:
 //! - **Windows:** On Windows 8 and 10, per-monitor scaling is readily configured by users from the display settings.
@@ -43,18 +53,28 @@
 //! - **X11:** On X11, we calcuate the DPI factor based on the millimeter dimensions provided by XRandR. This can
 //! result in a wide range of possible values, including some interesting ones like 1.0833333333333333. This can be
 //! overridden using the `WINIT_HIDPI_FACTOR` environment variable, though that's not recommended.
-//! - **Wayland:** On Wayland, DPI factors are very much at the discretion of the user.
+//! - **Wayland:** On Wayland, DPI factors are set per-screen by the server, and are always integers (most often 1 or 2).
 //! - **iOS:** DPI factors are both constant and device-specific on iOS.
 //! - **Android:** This feature isn't yet implemented on Android, so the DPI factor will always be returned as 1.0.
 //!
 //! The window's logical size is conserved across DPI changes, resulting in the physical size changing instead. This
-//! may be surprising on X11, but is quite standard elsewhere. Physical size changes produce a
+//! may be surprising on X11, but is quite standard elsewhere. Physical size changes always produce a
 //! [`Resized`](../enum.WindowEvent.html#variant.Resized) event, even on platforms where no resize actually occurs,
 //! such as macOS and Wayland. As a result, it's not necessary to separately handle
 //! [`HiDpiFactorChanged`](../enum.WindowEvent.html#variant.HiDpiFactorChanged) if you're only listening for size.
 //!
 //! Your GPU has no awareness of the concept of logical pixels, and unless you like wasting pixel density, your
 //! framebuffer's size should be in physical pixels.
+//!
+//! `winit` will send [`Resized`](../enum.WindowEvent.html#variant.Resized) events whenever a window's logical size
+//! changes, and [`HiDpiFactorChanged`](../enum.WindowEvent.html#variant.HiDpiFactorChanged) events
+//! whenever the DPI factor changes. Receiving either of these events means that the physical size of your window has
+//! changed, and you should recompute it using the latest values you received for each. If the logical size and the
+//! DPI factor change simultaneously, `winit` will send both events together; thus, it's recommended to buffer
+//! these events and process them at the end of the queue.
+//!
+//! If you never received any [`HiDpiFactorChanged`](../enum.WindowEvent.html#variant.HiDpiFactorChanged) events,
+//! then your window's DPI factor is 1.
 
 /// Checks that the DPI factor is a normal positive `f64`.
 ///
@@ -72,6 +92,7 @@ pub fn validate_hidpi_factor(dpi_factor: f64) -> bool {
 /// which can cause noticable issues. To help with that, an `Into<(i32, i32)>` implementation is provided which
 /// does the rounding for you.
 #[derive(Debug, Copy, Clone, PartialEq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct LogicalPosition {
     pub x: f64,
     pub y: f64,
@@ -132,6 +153,7 @@ impl Into<(i32, i32)> for LogicalPosition {
 /// which can cause noticable issues. To help with that, an `Into<(i32, i32)>` implementation is provided which
 /// does the rounding for you.
 #[derive(Debug, Copy, Clone, PartialEq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct PhysicalPosition {
     pub x: f64,
     pub y: f64,
@@ -192,6 +214,7 @@ impl Into<(i32, i32)> for PhysicalPosition {
 /// which can cause noticable issues. To help with that, an `Into<(u32, u32)>` implementation is provided which
 /// does the rounding for you.
 #[derive(Debug, Copy, Clone, PartialEq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct LogicalSize {
     pub width: f64,
     pub height: f64,
@@ -252,6 +275,7 @@ impl Into<(u32, u32)> for LogicalSize {
 /// which can cause noticable issues. To help with that, an `Into<(u32, u32)>` implementation is provided which
 /// does the rounding for you.
 #[derive(Debug, Copy, Clone, PartialEq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct PhysicalSize {
     pub width: f64,
     pub height: f64,

src/events.rs

@@ -3,7 +3,7 @@ use std::path::PathBuf;
 use {DeviceId, LogicalPosition, LogicalSize, WindowId};
 
 /// Describes a generic event.
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq)]
 pub enum Event {
     WindowEvent {
         window_id: WindowId,
@@ -22,7 +22,7 @@ pub enum Event {
 }
 
 /// Describes an event from a `Window`.
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq)]
 pub enum WindowEvent {
     /// The size of the window has changed. Contains the client area's new dimensions.
     Resized(LogicalSize),
@@ -116,7 +116,7 @@ pub enum WindowEvent {
 /// may not match.
 ///
 /// Note that these events are delivered regardless of input focus.
-#[derive(Clone, Debug)]
+#[derive(Clone, Debug, PartialEq)]
 pub enum DeviceEvent {
     Added,
     Removed,
@@ -147,7 +147,8 @@ pub enum DeviceEvent {
 }
 
 /// Describes a keyboard input event.
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct KeyboardInput {
     /// Identifies the physical key pressed
     ///
@@ -173,6 +174,7 @@ pub struct KeyboardInput {
 
 /// Describes touch-screen input state.
 #[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum TouchPhase {
     Started,
     Moved,
@@ -195,7 +197,7 @@ pub enum TouchPhase {
 /// as previously received End event is a new finger and has nothing to do with an old one.
 ///
 /// Touch may be cancelled if for example window lost focus.
-#[derive(Debug, Clone, Copy)]
+#[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Touch {
     pub device_id: DeviceId,
     pub phase: TouchPhase,
@@ -215,6 +217,7 @@ pub type ButtonId = u32;
 
 /// Describes the input state of a key.
 #[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum ElementState {
     Pressed,
     Released,
@@ -222,6 +225,7 @@ pub enum ElementState {
 
 /// Describes a button of a mouse controller.
 #[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum MouseButton {
     Left,
     Right,
@@ -231,6 +235,7 @@ pub enum MouseButton {
 
 /// Describes a difference in the mouse scroll wheel state.
 #[derive(Debug, Clone, Copy, PartialEq)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum MouseScrollDelta {
 	/// Amount in lines or rows to scroll in the horizontal
 	/// and vertical directions.
@@ -250,6 +255,7 @@ pub enum MouseScrollDelta {
 /// Symbolic name for a keyboard key.
 #[derive(Debug, Hash, PartialEq, Eq, Clone, Copy)]
 #[repr(u32)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum VirtualKeyCode {
     /// The '1' key over the letters.
     Key1,
@@ -317,6 +323,15 @@ pub enum VirtualKeyCode {
     F13,
     F14,
     F15,
+    F16,
+    F17,
+    F18,
+    F19,
+    F20,
+    F21,
+    F22,
+    F23,
+    F24,
 
     /// Print Screen/SysRq.
     Snapshot,
@@ -440,6 +455,8 @@ pub enum VirtualKeyCode {
 ///
 /// Each field of this struct represents a modifier and is `true` if this modifier is active.
 #[derive(Default, Debug, Hash, PartialEq, Eq, Clone, Copy)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
+#[cfg_attr(feature = "serde", serde(default))]
 pub struct ModifiersState {
     /// The "shift" key
     pub shift: bool,

src/icon.rs

@@ -146,7 +146,7 @@ impl Icon {
 /// Requires the `icon_loading` feature.
 impl From<image::DynamicImage> for Icon {
     fn from(image: image::DynamicImage) -> Self {
-        use image::{GenericImage, Pixel};
+        use image::{GenericImageView, Pixel};
         let (width, height) = image.dimensions();
         let mut rgba = Vec::with_capacity((width * height) as usize * PIXEL_SIZE);
         for (_, _, pixel) in image.pixels() {

src/lib.rs

@@ -25,11 +25,11 @@
 //! Once a window has been created, it will *generate events*. For example whenever the user moves
 //! the window, resizes the window, moves the mouse, etc. an event is generated.
 //!
-//! The events generated by a window can be retreived from the `EventsLoop` the window was created
+//! The events generated by a window can be retrieved from the `EventsLoop` the window was created
 //! with.
 //!
 //! There are two ways to do so. The first is to call `events_loop.poll_events(...)`, which will
-//! retreive all the events pending on the windows and immediately return after no new event is
+//! retrieve all the events pending on the windows and immediately return after no new event is
 //! available. You usually want to use this method in application that render continuously on the
 //! screen, such as video games.
 //!
@@ -80,7 +80,7 @@
 //! # Drawing on the window
 //!
 //! Winit doesn't provide any function that allows drawing on a window. However it allows you to
-//! retreive the raw handle of the window (see the `os` module for that), which in turn allows you
+//! retrieve the raw handle of the window (see the `os` module for that), which in turn allows you
 //! to create an OpenGL/Vulkan/DirectX/Metal/etc. context that will draw on the window.
 //!
 
@@ -92,6 +92,9 @@ extern crate libc;
 extern crate log;
 #[cfg(feature = "icon_loading")]
 extern crate image;
+#[cfg(feature = "serde")]
+#[macro_use]
+extern crate serde;
 
 #[cfg(target_os = "windows")]
 extern crate winapi;
@@ -104,13 +107,13 @@ extern crate cocoa;
 extern crate core_foundation;
 #[cfg(target_os = "macos")]
 extern crate core_graphics;
-#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 extern crate x11_dl;
-#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 extern crate parking_lot;
-#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 extern crate percent_encoding;
-#[cfg(any(target_os = "linux", target_os = "freebsd", target_os = "dragonfly", target_os = "openbsd"))]
+#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 extern crate smithay_client_toolkit as sctk;
 
 pub(crate) use dpi::*; // TODO: Actually change the imports throughout the codebase.
@@ -149,6 +152,12 @@ pub struct Window {
     window: platform::Window,
 }
 
+impl std::fmt::Debug for Window {
+    fn fmt(&self, fmtr: &mut std::fmt::Formatter) -> std::fmt::Result {
+        fmtr.pad("Window { .. }")
+    }
+}
+
 /// Identifier of a window. Unique for each window.
 ///
 /// Can be obtained with `window.id()`.
@@ -166,7 +175,7 @@ pub struct WindowId(platform::WindowId);
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId(platform::DeviceId);
 
-/// Provides a way to retreive events from the system and from the windows that were registered to
+/// Provides a way to retrieve events from the system and from the windows that were registered to
 /// the events loop.
 ///
 /// An `EventsLoop` can be seen more or less as a "context". Calling `EventsLoop::new()`
@@ -184,10 +193,17 @@ pub struct EventsLoop {
     _marker: ::std::marker::PhantomData<*mut ()> // Not Send nor Sync
 }
 
+impl std::fmt::Debug for EventsLoop {
+    fn fmt(&self, fmtr: &mut std::fmt::Formatter) -> std::fmt::Result {
+        fmtr.pad("EventsLoop { .. }")
+    }
+}
+
 /// Returned by the user callback given to the `EventsLoop::run_forever` method.
 ///
 /// Indicates whether the `run_forever` method should continue or complete.
-#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum ControlFlow {
     /// Continue looping and waiting for events.
     Continue,
@@ -263,6 +279,12 @@ pub struct EventsLoopProxy {
     events_loop_proxy: platform::EventsLoopProxy,
 }
 
+impl std::fmt::Debug for EventsLoopProxy {
+    fn fmt(&self, fmtr: &mut std::fmt::Formatter) -> std::fmt::Result {
+        fmtr.pad("EventsLoopProxy { .. }")
+    }
+}
+
 impl EventsLoopProxy {
     /// Wake up the `EventsLoop` from which this proxy was created.
     ///
@@ -301,6 +323,14 @@ pub struct WindowBuilder {
     platform_specific: platform::PlatformSpecificWindowBuilderAttributes,
 }
 
+impl std::fmt::Debug for WindowBuilder {
+    fn fmt(&self, fmtr: &mut std::fmt::Formatter) -> std::fmt::Result {
+        fmtr.debug_struct("WindowBuilder")
+            .field("window", &self.window)
+            .finish()
+    }
+}
+
 /// Error that can happen while creating a window or a headless renderer.
 #[derive(Debug, Clone)]
 pub enum CreationError {
@@ -331,7 +361,8 @@ impl std::error::Error for CreationError {
 }
 
 /// Describes the appearance of the mouse cursor.
-#[derive(Debug, Copy, Clone, PartialEq)]
+#[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
+#[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub enum MouseCursor {
     /// The platform-dependent default cursor.
     Default,

src/os/ios.rs

@@ -2,7 +2,7 @@
 
 use std::os::raw::c_void;
 
-use {MonitorId, Window};
+use {MonitorId, Window, WindowBuilder};
 
 /// Additional methods on `Window` that are specific to iOS.
 pub trait WindowExt {
@@ -29,6 +29,22 @@ impl WindowExt for Window {
     }
 }
 
+/// Additional methods on `WindowBuilder` that are specific to iOS.
+pub trait WindowBuilderExt {
+    /// Sets the root view class used by the `Window`, otherwise a barebones `UIView` is provided.
+    ///
+    /// The class will be initialized by calling `[root_view initWithFrame:CGRect]`
+    fn with_root_view_class(self, root_view_class: *const c_void) -> WindowBuilder;
+}
+
+impl WindowBuilderExt for WindowBuilder {
+    #[inline]
+    fn with_root_view_class(mut self, root_view_class: *const c_void) -> WindowBuilder {
+        self.platform_specific.root_view_class = unsafe { &*(root_view_class as *const _) };
+        self
+    }
+}
+
 /// Additional methods on `MonitorId` that are specific to iOS.
 pub trait MonitorIdExt {
     /// Returns a pointer to the `UIScreen` that is used by this monitor.

src/os/macos.rs

@@ -1,8 +1,6 @@
 #![cfg(target_os = "macos")]
 
-use std::convert::From;
 use std::os::raw::c_void;
-use cocoa::appkit::NSApplicationActivationPolicy;
 use {LogicalSize, MonitorId, Window, WindowBuilder};
 
 /// Additional methods on `Window` that are specific to MacOS.
@@ -16,6 +14,14 @@ pub trait WindowExt {
     ///
     /// The pointer will become invalid when the `Window` is destroyed.
     fn get_nsview(&self) -> *mut c_void;
+
+    /// Request user attention, causing the application's dock icon to bounce.
+    /// Note that this has no effect if the application is already focused.
+    ///
+    /// The `is_critical` flag has the following effects:
+    /// - `false`: the dock icon will only bounce once.
+    /// - `true`: the dock icon will bounce until the application is focused.
+    fn request_user_attention(&self, is_critical: bool);
 }
 
 impl WindowExt for Window {
@@ -28,6 +34,11 @@ impl WindowExt for Window {
     fn get_nsview(&self) -> *mut c_void {
         self.window.get_nsview()
     }
+
+    #[inline]
+    fn request_user_attention(&self, is_critical: bool) {
+        self.window.request_user_attention(is_critical)
+    }
 }
 
 /// Corresponds to `NSApplicationActivationPolicy`.
@@ -47,19 +58,6 @@ impl Default for ActivationPolicy {
     }
 }
 
-impl From<ActivationPolicy> for NSApplicationActivationPolicy {
-    fn from(activation_policy: ActivationPolicy) -> Self {
-        match activation_policy {
-            ActivationPolicy::Regular =>
-                NSApplicationActivationPolicy::NSApplicationActivationPolicyRegular,
-            ActivationPolicy::Accessory =>
-                NSApplicationActivationPolicy::NSApplicationActivationPolicyAccessory,
-            ActivationPolicy::Prohibited =>
-                NSApplicationActivationPolicy::NSApplicationActivationPolicyProhibited,
-        }
-    }
-}
-
 /// Additional methods on `WindowBuilder` that are specific to MacOS.
 ///
 /// **Note:** Properties dealing with the titlebar will be overwritten by the `with_decorations` method

src/os/unix.rs

@@ -1,4 +1,4 @@
-#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 
 use std::os::raw;
 use std::ptr;
@@ -219,6 +219,8 @@ pub trait WindowBuilderExt {
     fn with_override_redirect(self, override_redirect: bool) -> WindowBuilder;
     /// Build window with `_NET_WM_WINDOW_TYPE` hint; defaults to `Normal`. Only relevant on X11.
     fn with_x11_window_type(self, x11_window_type: XWindowType) -> WindowBuilder;
+    /// Build window with `_GTK_THEME_VARIANT` hint set to the specified value. Currently only relevant on X11.
+    fn with_gtk_theme_variant(self, variant: String) -> WindowBuilder;
     /// Build window with resize increment hint. Only implemented on X11.
     fn with_resize_increments(self, increments: LogicalSize) -> WindowBuilder;
     /// Build window with base size hint. Only implemented on X11.
@@ -269,6 +271,12 @@ impl WindowBuilderExt for WindowBuilder {
         self.platform_specific.base_size = Some(base_size.into());
         self
     }
+
+    #[inline]
+    fn with_gtk_theme_variant(mut self, variant: String) -> WindowBuilder {
+        self.platform_specific.gtk_theme_variant = Some(variant);
+        self
+    }
 }
 
 /// Additional methods on `MonitorId` that are specific to Linux.

src/platform/emscripten/mod.rs

@@ -810,11 +810,15 @@ fn key_translate_virt(input: [ffi::EM_UTF8; ffi::EM_HTML5_SHORT_STRING_LEN_BYTES
         "F13" => Some(F13),
         "F14" => Some(F14),
         "F15" => Some(F15),
-        "F16" => None,
-        "F17" => None,
-        "F18" => None,
-        "F19" => None,
-        "F20" => None,
+        "F16" => Some(F16),
+        "F17" => Some(F17),
+        "F18" => Some(F18),
+        "F19" => Some(F19),
+        "F20" => Some(F20),
+        "F21" => Some(F21),
+        "F22" => Some(F22),
+        "F23" => Some(F23),
+        "F24" => Some(F24),
         "Soft1" => None,
         "Soft2" => None,
         "Soft3" => None,

src/platform/ios/ffi.rs

@@ -1,10 +1,9 @@
 #![allow(non_camel_case_types, non_snake_case, non_upper_case_globals)]
 
 use std::ffi::CString;
-use std::mem;
 use std::os::raw::*;
 
-use objc::runtime::{Class, Object};
+use objc::runtime::Object;
 
 pub type id = *mut Object;
 pub const nil: id = 0 as id;
@@ -15,19 +14,11 @@ pub type Boolean = u32;
 
 pub const kCFRunLoopRunHandledSource: i32 = 4;
 
-pub const UIViewAutoresizingFlexibleWidth: NSUInteger = 1 << 1;
-pub const UIViewAutoresizingFlexibleHeight: NSUInteger = 1 << 4;
-
 #[cfg(target_pointer_width = "32")]
 pub type CGFloat = f32;
 #[cfg(target_pointer_width = "64")]
 pub type CGFloat = f64;
 
-#[cfg(target_pointer_width = "32")]
-pub type NSUInteger = u32;
-#[cfg(target_pointer_width = "64")]
-pub type NSUInteger = u64;
-
 #[repr(C)]
 #[derive(Debug, Clone)]
 pub struct CGPoint {
@@ -73,12 +64,24 @@ extern {
 
 extern {
     pub fn setjmp(env: *mut c_void) -> c_int;
-    pub fn longjmp(env: *mut c_void, val: c_int);
+    pub fn longjmp(env: *mut c_void, val: c_int) -> !;
 }
 
+// values taken from "setjmp.h" header in xcode iPhoneOS/iPhoneSimulator SDK
+#[cfg(any(target_arch = "x86_64"))]
+pub const JBLEN: usize = (9 * 2) + 3 + 16;
+#[cfg(any(target_arch = "x86"))]
+pub const JBLEN: usize = 18;
+#[cfg(target_arch = "arm")]
+pub const JBLEN: usize = 10 + 16 + 2;
+#[cfg(target_arch = "aarch64")]
+pub const JBLEN: usize = (14 + 8 + 2) * 2;
+
+pub type JmpBuf = [c_int; JBLEN];
+
 pub trait NSString: Sized {
     unsafe fn alloc(_: Self) -> id {
-        msg_send![class("NSString"), alloc]
+        msg_send![class!(NSString), alloc]
     }
 
     unsafe fn initWithUTF8String_(self, c_string: *const c_char) -> id;
@@ -105,10 +108,3 @@ impl NSString for id {
         msg_send![self, UTF8String]
     }
 }
-
-#[inline]
-pub fn class(name: &str) -> *mut Class {
-    unsafe {
-        mem::transmute(Class::get(name))
-    }
-}

src/platform/ios/mod.rs

@@ -61,8 +61,10 @@
 #![cfg(target_os = "ios")]
 
 use std::{fmt, mem, ptr};
+use std::cell::RefCell;
 use std::collections::VecDeque;
 use std::os::raw::*;
+use std::sync::Arc;
 
 use objc::declare::ClassDecl;
 use objc::runtime::{BOOL, Class, Object, Sel, YES};
@@ -90,6 +92,8 @@ use self::ffi::{
     CGPoint,
     CGRect,
     id,
+    JBLEN,
+    JmpBuf,
     kCFRunLoopDefaultMode,
     kCFRunLoopRunHandledSource,
     longjmp,
@@ -97,14 +101,13 @@ use self::ffi::{
     NSString,
     setjmp,
     UIApplicationMain,
-    UIViewAutoresizingFlexibleWidth,
-    UIViewAutoresizingFlexibleHeight,
  };
 
-static mut JMPBUF: [c_int; 27] = [0; 27];
+static mut JMPBUF: Option<Box<JmpBuf>> = None;
 
 pub struct Window {
-    delegate_state: *mut DelegateState,
+    _events_queue: Arc<RefCell<VecDeque<Event>>>,
+    delegate_state: Box<DelegateState>,
 }
 
 unsafe impl Send for Window {}
@@ -112,7 +115,6 @@ unsafe impl Sync for Window {}
 
 #[derive(Debug)]
 struct DelegateState {
-    events_queue: VecDeque<Event>,
     window: id,
     controller: id,
     view: id,
@@ -123,7 +125,6 @@ struct DelegateState {
 impl DelegateState {
     fn new(window: id, controller: id, view: id, size: LogicalSize, scale: f64) -> DelegateState {
         DelegateState {
-            events_queue: VecDeque::new(),
             window,
             controller,
             view,
@@ -170,7 +171,7 @@ impl fmt::Debug for MonitorId {
 impl MonitorId {
     #[inline]
     pub fn get_uiscreen(&self) -> id {
-        let class = Class::get("UIScreen").expect("Failed to get class `UIScreen`");
+        let class = class!(UIScreen);
         unsafe { msg_send![class, mainScreen] }
     }
 
@@ -199,7 +200,7 @@ impl MonitorId {
 }
 
 pub struct EventsLoop {
-    delegate_state: *mut DelegateState,
+    events_queue: Arc<RefCell<VecDeque<Event>>>,
 }
 
 #[derive(Clone)]
@@ -208,21 +209,11 @@ pub struct EventsLoopProxy;
 impl EventsLoop {
     pub fn new() -> EventsLoop {
         unsafe {
-            if setjmp(mem::transmute(&mut JMPBUF)) != 0 {
-                let app_class = Class::get("UIApplication").expect("Failed to get class `UIApplication`");
-                let app: id = msg_send![app_class, sharedApplication];
-                let delegate: id = msg_send![app, delegate];
-                let state: *mut c_void = *(&*delegate).get_ivar("winitState");
-                let delegate_state = state as *mut DelegateState;
-                return EventsLoop { delegate_state };
+            if !msg_send![class!(NSThread), isMainThread] {
+                panic!("`EventsLoop` can only be created on the main thread on iOS");
             }
         }
-
-        create_view_class();
-        create_delegate_class();
-        start_app();
-
-        panic!("Couldn't create `UIApplication`!")
+        EventsLoop { events_queue: Default::default() }
     }
 
     #[inline]
@@ -240,29 +231,30 @@ impl EventsLoop {
     pub fn poll_events<F>(&mut self, mut callback: F)
         where F: FnMut(::Event)
     {
+        if let Some(event) = self.events_queue.borrow_mut().pop_front() {
+            callback(event);
+            return;
+        }
+
         unsafe {
-            let state = &mut *self.delegate_state;
-
-            if let Some(event) = state.events_queue.pop_front() {
-                callback(event);
-                return;
-            }
-
             // jump hack, so we won't quit on willTerminate event before processing it
-            if setjmp(mem::transmute(&mut JMPBUF)) != 0 {
-                if let Some(event) = state.events_queue.pop_front() {
+            assert!(JMPBUF.is_some(), "`EventsLoop::poll_events` must be called after window creation on iOS");
+            if setjmp(mem::transmute_copy(&mut JMPBUF)) != 0 {
+                if let Some(event) = self.events_queue.borrow_mut().pop_front() {
                     callback(event);
                     return;
                 }
             }
+        }
 
+        unsafe {
             // run runloop
             let seconds: CFTimeInterval = 0.000002;
             while CFRunLoopRunInMode(kCFRunLoopDefaultMode, seconds, 1) == kCFRunLoopRunHandledSource {}
+        }
 
-            if let Some(event) = state.events_queue.pop_front() {
-                callback(event)
-            }
+        if let Some(event) = self.events_queue.borrow_mut().pop_front() {
+            callback(event)
         }
     }
 
@@ -301,8 +293,18 @@ pub struct WindowId;
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct DeviceId;
 
-#[derive(Clone, Default)]
-pub struct PlatformSpecificWindowBuilderAttributes;
+#[derive(Clone)]
+pub struct PlatformSpecificWindowBuilderAttributes {
+    pub root_view_class: &'static Class,
+}
+
+impl Default for PlatformSpecificWindowBuilderAttributes {
+    fn default() -> Self {
+        PlatformSpecificWindowBuilderAttributes {
+            root_view_class: class!(UIView),
+        }
+    }
+}
 
 // TODO: AFAIK transparency is enabled by default on iOS,
 // so to be consistent with other platforms we have to change that.
@@ -310,19 +312,60 @@ impl Window {
     pub fn new(
         ev: &EventsLoop,
         _attributes: WindowAttributes,
-        _pl_alltributes: PlatformSpecificWindowBuilderAttributes,
+        pl_attributes: PlatformSpecificWindowBuilderAttributes,
     ) -> Result<Window, CreationError> {
-        Ok(Window { delegate_state: ev.delegate_state })
+        unsafe {
+            debug_assert!(mem::size_of_val(&JMPBUF) == mem::size_of::<Box<JmpBuf>>());
+            assert!(mem::replace(&mut JMPBUF, Some(Box::new([0; JBLEN]))).is_none(), "Only one `Window` is supported on iOS");
+        }
+
+        unsafe {
+            if setjmp(mem::transmute_copy(&mut JMPBUF)) != 0 {
+                let app_class = class!(UIApplication);
+                let app: id = msg_send![app_class, sharedApplication];
+                let delegate: id = msg_send![app, delegate];
+                let state: *mut c_void = *(&*delegate).get_ivar("winitState");
+                let mut delegate_state = Box::from_raw(state as *mut DelegateState);
+                let events_queue = &*ev.events_queue;
+                (&mut *delegate).set_ivar("eventsQueue", mem::transmute::<_, *mut c_void>(events_queue));
+
+                // easiest? way to get access to PlatformSpecificWindowBuilderAttributes to configure the view
+                let rect: CGRect = msg_send![MonitorId.get_uiscreen(), bounds];
+
+                let uiview_class = class!(UIView);
+                let root_view_class = pl_attributes.root_view_class;
+                let is_uiview: BOOL = msg_send![root_view_class, isSubclassOfClass:uiview_class];
+                assert!(is_uiview == YES, "`root_view_class` must inherit from `UIView`");
+
+                delegate_state.view = msg_send![root_view_class, alloc];
+                assert!(!delegate_state.view.is_null(), "Failed to create `UIView` instance");
+                delegate_state.view = msg_send![delegate_state.view, initWithFrame:rect];
+                assert!(!delegate_state.view.is_null(), "Failed to initialize `UIView` instance");
+
+                let _: () = msg_send![delegate_state.controller, setView:delegate_state.view];
+                let _: () = msg_send![delegate_state.window, makeKeyAndVisible];
+
+                return Ok(Window {
+                    _events_queue: ev.events_queue.clone(),
+                    delegate_state,
+                });
+            }
+        }
+
+        create_delegate_class();
+        start_app();
+
+        panic!("Couldn't create `UIApplication`!")
     }
 
     #[inline]
     pub fn get_uiwindow(&self) -> id {
-        unsafe { (*self.delegate_state).window }
+        self.delegate_state.window
     }
 
     #[inline]
     pub fn get_uiview(&self) -> id {
-        unsafe { (*self.delegate_state).view }
+        self.delegate_state.view
     }
 
     #[inline]
@@ -359,7 +402,7 @@ impl Window {
 
     #[inline]
     pub fn get_inner_size(&self) -> Option<LogicalSize> {
-        unsafe { Some((&*self.delegate_state).size) }
+        Some(self.delegate_state.size)
     }
 
     #[inline]
@@ -404,7 +447,7 @@ impl Window {
 
     #[inline]
     pub fn get_hidpi_factor(&self) -> f64 {
-        unsafe { (&*self.delegate_state) }.scale
+        self.delegate_state.scale
     }
 
     #[inline]
@@ -469,10 +512,9 @@ impl Window {
 
 fn create_delegate_class() {
     extern fn did_finish_launching(this: &mut Object, _: Sel, _: id, _: id) -> BOOL {
-        let screen_class = Class::get("UIScreen").expect("Failed to get class `UIScreen`");
-        let window_class = Class::get("UIWindow").expect("Failed to get class `UIWindow`");
-        let controller_class = Class::get("MainViewController").expect("Failed to get class `MainViewController`");
-        let view_class = Class::get("MainView").expect("Failed to get class `MainView`");
+        let screen_class = class!(UIScreen);
+        let window_class = class!(UIWindow);
+        let controller_class = class!(UIViewController);
         unsafe {
             let main_screen: id = msg_send![screen_class, mainScreen];
             let bounds: CGRect = msg_send![main_screen, bounds];
@@ -486,30 +528,28 @@ fn create_delegate_class() {
             let view_controller: id = msg_send![controller_class, alloc];
             let view_controller: id = msg_send![view_controller, init];
 
-            let view: id = msg_send![view_class, alloc];
-            let view: id = msg_send![view, initForGl:&bounds];
-
             let _: () = msg_send![window, setRootViewController:view_controller];
-            let _: () = msg_send![window, makeKeyAndVisible];
 
-            let state = Box::new(DelegateState::new(window, view_controller, view, size, scale as f64));
+            let state = Box::new(DelegateState::new(window, view_controller, ptr::null_mut(), size, scale as f64));
             let state_ptr: *mut DelegateState = mem::transmute(state);
             this.set_ivar("winitState", state_ptr as *mut c_void);
 
+            // The `UIView` is setup in `Window::new` which gets `longjmp`'ed to here.
+            // This makes it easier to configure the specific `UIView` type.
             let _: () = msg_send![this, performSelector:sel!(postLaunch:) withObject:nil afterDelay:0.0];
         }
         YES
     }
 
     extern fn post_launch(_: &Object, _: Sel, _: id) {
-        unsafe { longjmp(mem::transmute(&mut JMPBUF),1); }
+        unsafe { longjmp(mem::transmute_copy(&mut JMPBUF), 1); }
     }
 
     extern fn did_become_active(this: &Object, _: Sel, _: id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
-            state.events_queue.push_back(Event::WindowEvent {
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
+            events_queue.borrow_mut().push_back(Event::WindowEvent {
                 window_id: RootEventId(WindowId),
                 event: WindowEvent::Focused(true),
             });
@@ -518,9 +558,9 @@ fn create_delegate_class() {
 
     extern fn will_resign_active(this: &Object, _: Sel, _: id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
-            state.events_queue.push_back(Event::WindowEvent {
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
+            events_queue.borrow_mut().push_back(Event::WindowEvent {
                 window_id: RootEventId(WindowId),
                 event: WindowEvent::Focused(false),
             });
@@ -529,38 +569,38 @@ fn create_delegate_class() {
 
     extern fn will_enter_foreground(this: &Object, _: Sel, _: id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
-            state.events_queue.push_back(Event::Suspended(false));
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
+            events_queue.borrow_mut().push_back(Event::Suspended(false));
         }
     }
 
     extern fn did_enter_background(this: &Object, _: Sel, _: id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
-            state.events_queue.push_back(Event::Suspended(true));
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
+            events_queue.borrow_mut().push_back(Event::Suspended(true));
         }
     }
 
     extern fn will_terminate(this: &Object, _: Sel, _: id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
             // push event to the front to garantee that we'll process it
             // immidiatly after jump
-            state.events_queue.push_front(Event::WindowEvent {
+            events_queue.borrow_mut().push_front(Event::WindowEvent {
                 window_id: RootEventId(WindowId),
                 event: WindowEvent::Destroyed,
             });
-            longjmp(mem::transmute(&mut JMPBUF),1);
+            longjmp(mem::transmute_copy(&mut JMPBUF), 1);
         }
     }
 
     extern fn handle_touches(this: &Object, _: Sel, touches: id, _:id) {
         unsafe {
-            let state: *mut c_void = *this.get_ivar("winitState");
-            let state = &mut *(state as *mut DelegateState);
+            let events_queue: *mut c_void = *this.get_ivar("eventsQueue");
+            let events_queue = &*(events_queue as *const RefCell<VecDeque<Event>>);
 
             let touches_enum: id = msg_send![touches, objectEnumerator];
 
@@ -573,7 +613,7 @@ fn create_delegate_class() {
                 let touch_id = touch as u64;
                 let phase: i32 = msg_send![touch, phase];
 
-                state.events_queue.push_back(Event::WindowEvent {
+                events_queue.borrow_mut().push_back(Event::WindowEvent {
                     window_id: RootEventId(WindowId),
                     event: WindowEvent::Touch(Touch {
                         device_id: DEVICE_ID,
@@ -593,7 +633,7 @@ fn create_delegate_class() {
         }
     }
 
-    let ui_responder = Class::get("UIResponder").expect("Failed to get class `UIResponder`");
+    let ui_responder = class!(UIResponder);
     let mut decl = ClassDecl::new("AppDelegate", ui_responder).expect("Failed to declare class `AppDelegate`");
 
     unsafe {
@@ -633,46 +673,12 @@ fn create_delegate_class() {
                         post_launch as extern fn(&Object, Sel, id));
 
         decl.add_ivar::<*mut c_void>("winitState");
+        decl.add_ivar::<*mut c_void>("eventsQueue");
 
         decl.register();
     }
 }
 
-// TODO: winit shouldn't contain GL-specfiic code
-pub fn create_view_class() {
-    let superclass = Class::get("UIViewController").expect("Failed to get class `UIViewController`");
-    let decl = ClassDecl::new("MainViewController", superclass).expect("Failed to declare class `MainViewController`");
-    decl.register();
-
-    extern fn init_for_gl(this: &Object, _: Sel, frame: *const c_void) -> id {
-        unsafe {
-            let bounds = frame as *const CGRect;
-            let view: id = msg_send![this, initWithFrame:(*bounds).clone()];
-
-            let mask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
-            let _: () = msg_send![view, setAutoresizingMask:mask];
-            let _: () = msg_send![view, setAutoresizesSubviews:YES];
-
-            let layer: id = msg_send![view, layer];
-            let _ : () = msg_send![layer, setOpaque:YES];
-
-            view
-        }
-    }
-
-    extern fn layer_class(_: &Class, _: Sel) -> *const Class {
-        unsafe { mem::transmute(Class::get("CAEAGLLayer").expect("Failed to get class `CAEAGLLayer`")) }
-    }
-
-    let superclass = Class::get("GLKView").expect("Failed to get class `GLKView`");
-    let mut decl = ClassDecl::new("MainView", superclass).expect("Failed to declare class `MainView`");
-    unsafe {
-        decl.add_method(sel!(initForGl:), init_for_gl as extern fn(&Object, Sel, *const c_void) -> id);
-        decl.add_class_method(sel!(layerClass), layer_class as extern fn(&Class, Sel) -> *const Class);
-        decl.register();
-    }
-}
-
 #[inline]
 fn start_app() {
     unsafe {

src/platform/linux/dlopen.rs

@@ -1,4 +1,4 @@
-#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 #![allow(dead_code)]
 
 use std::os::raw::{c_void, c_char, c_int};

src/platform/linux/mod.rs

@@ -1,4 +1,4 @@
-#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 
 use std::collections::VecDeque;
 use std::{env, mem};
@@ -45,6 +45,7 @@ pub struct PlatformSpecificWindowBuilderAttributes {
     pub class: Option<(String, String)>,
     pub override_redirect: bool,
     pub x11_window_type: x11::util::WindowType,
+    pub gtk_theme_variant: Option<String>,
 }
 
 lazy_static!(
@@ -429,10 +430,7 @@ impl EventsLoop {
         };
 
         let err_string = format!(
-r#"Failed to initialize any backend!
-    Wayland status: {:#?}
-    X11 status: {:#?}
-"#,
+            "Failed to initialize any backend! Wayland status: {:?} X11 status: {:?}",
             wayland_err,
             x11_err,
         );

src/platform/linux/wayland/event_loop.rs

@@ -1,22 +1,25 @@
 use std::cell::RefCell;
 use std::collections::VecDeque;
 use std::fmt;
-use std::sync::{Arc, Mutex, Weak};
 use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::{Arc, Mutex, Weak};
 
 use {ControlFlow, EventsLoopClosed, PhysicalPosition, PhysicalSize};
 
-use super::WindowId;
 use super::window::WindowStore;
+use super::WindowId;
 
-use sctk::Environment;
 use sctk::output::OutputMgr;
-use sctk::reexports::client::{Display, EventQueue, GlobalEvent, Proxy, ConnectError};
-use sctk::reexports::client::commons::Implementation;
-use sctk::reexports::client::protocol::{wl_keyboard, wl_output, wl_pointer, wl_registry, wl_seat,
-                                        wl_touch};
+use sctk::reexports::client::protocol::{
+    wl_keyboard, wl_output, wl_pointer, wl_registry, wl_seat, wl_touch,
+};
+use sctk::reexports::client::{ConnectError, Display, EventQueue, GlobalEvent, Proxy};
+use sctk::Environment;
 
 use sctk::reexports::client::protocol::wl_display::RequestsTrait as DisplayRequests;
+use sctk::reexports::client::protocol::wl_surface::RequestsTrait;
+
+use ModifiersState;
 
 pub struct EventsLoopSink {
     buffer: VecDeque<::Event>,
@@ -91,7 +94,7 @@ impl EventsLoopProxy {
                 // Update the `EventsLoop`'s `pending_wakeup` flag.
                 wakeup.store(true, Ordering::Relaxed);
                 // Cause the `EventsLoop` to break from `dispatch` if it is currently blocked.
-                let _ = display.sync();
+                let _ = display.sync(|callback| callback.implement(|_, _| {}, ()));
                 display.flush().map_err(|_| EventsLoopClosed)?;
                 Ok(())
             }
@@ -104,29 +107,39 @@ impl EventsLoop {
     pub fn new() -> Result<EventsLoop, ConnectError> {
         let (display, mut event_queue) = Display::connect_to_env()?;
 
+        let display = Arc::new(display);
+        let pending_wakeup = Arc::new(AtomicBool::new(false));
         let sink = Arc::new(Mutex::new(EventsLoopSink::new()));
         let store = Arc::new(Mutex::new(WindowStore::new()));
         let seats = Arc::new(Mutex::new(Vec::new()));
 
-        let env = Environment::from_registry_with_cb(
-            display.get_registry().unwrap(),
+        let mut seat_manager = SeatManager {
+            sink: sink.clone(),
+            store: store.clone(),
+            seats: seats.clone(),
+            events_loop_proxy: EventsLoopProxy {
+                display: Arc::downgrade(&display),
+                pending_wakeup: Arc::downgrade(&pending_wakeup),
+            },
+        };
+
+        let env = Environment::from_display_with_cb(
+            &display,
             &mut event_queue,
-            SeatManager {
-                sink: sink.clone(),
-                store: store.clone(),
-                seats: seats.clone(),
+            move |event, registry| { 
+                seat_manager.receive(event, registry)
             },
         ).unwrap();
 
         Ok(EventsLoop {
-            display: Arc::new(display),
+            display,
             evq: RefCell::new(event_queue),
-            sink: sink,
-            pending_wakeup: Arc::new(AtomicBool::new(false)),
-            store: store,
-            env: env,
+            sink,
+            pending_wakeup,
+            store,
+            env,
             cleanup_needed: Arc::new(Mutex::new(false)),
-            seats: seats,
+            seats,
         })
     }
 
@@ -242,6 +255,9 @@ impl EventsLoop {
                         *size = (w, h);
                     } else if frame_refresh {
                         frame.refresh();
+                        if !refresh {
+                            frame.surface().commit()
+                        }
                     }
                 }
                 if let Some(dpi) = new_dpi {
@@ -266,9 +282,10 @@ struct SeatManager {
     sink: Arc<Mutex<EventsLoopSink>>,
     store: Arc<Mutex<WindowStore>>,
     seats: Arc<Mutex<Vec<(u32, Proxy<wl_seat::WlSeat>)>>>,
+    events_loop_proxy: EventsLoopProxy,
 }
 
-impl Implementation<Proxy<wl_registry::WlRegistry>, GlobalEvent> for SeatManager {
+impl SeatManager {
     fn receive(&mut self, evt: GlobalEvent, registry: Proxy<wl_registry::WlRegistry>) {
         use self::wl_registry::RequestsTrait as RegistryRequests;
         use self::wl_seat::RequestsTrait as SeatRequests;
@@ -280,16 +297,23 @@ impl Implementation<Proxy<wl_registry::WlRegistry>, GlobalEvent> for SeatManager
             } if interface == "wl_seat" =>
             {
                 use std::cmp::min;
+
+                let mut seat_data = SeatData {
+                    sink: self.sink.clone(),
+                    store: self.store.clone(),
+                    pointer: None,
+                    keyboard: None,
+                    touch: None,
+                    events_loop_proxy: self.events_loop_proxy.clone(),
+                    modifiers_tracker: Arc::new(Mutex::new(ModifiersState::default())),
+                };
                 let seat = registry
-                    .bind::<wl_seat::WlSeat>(min(version, 5), id)
-                    .unwrap()
-                    .implement(SeatData {
-                        sink: self.sink.clone(),
-                        store: self.store.clone(),
-                        pointer: None,
-                        keyboard: None,
-                        touch: None,
-                    });
+                    .bind(min(version, 5), id, move |seat| {
+                        seat.implement(move |event, seat| {
+                            seat_data.receive(event, seat)
+                        }, ())
+                    })
+                    .unwrap();
                 self.store.lock().unwrap().new_seat(&seat);
                 self.seats.lock().unwrap().push((id, seat));
             }
@@ -313,20 +337,22 @@ struct SeatData {
     pointer: Option<Proxy<wl_pointer::WlPointer>>,
     keyboard: Option<Proxy<wl_keyboard::WlKeyboard>>,
     touch: Option<Proxy<wl_touch::WlTouch>>,
+    events_loop_proxy: EventsLoopProxy,
+    modifiers_tracker: Arc<Mutex<ModifiersState>>,
 }
 
-impl Implementation<Proxy<wl_seat::WlSeat>, wl_seat::Event> for SeatData {
+impl SeatData {
     fn receive(&mut self, evt: wl_seat::Event, seat: Proxy<wl_seat::WlSeat>) {
-        use self::wl_seat::RequestsTrait as SeatRequests;
         match evt {
             wl_seat::Event::Name { .. } => (),
             wl_seat::Event::Capabilities { capabilities } => {
                 // create pointer if applicable
                 if capabilities.contains(wl_seat::Capability::Pointer) && self.pointer.is_none() {
                     self.pointer = Some(super::pointer::implement_pointer(
-                        seat.get_pointer().unwrap(),
+                        &seat,
                         self.sink.clone(),
                         self.store.clone(),
+                        self.modifiers_tracker.clone(),
                     ))
                 }
                 // destroy pointer if applicable
@@ -341,8 +367,10 @@ impl Implementation<Proxy<wl_seat::WlSeat>, wl_seat::Event> for SeatData {
                 // create keyboard if applicable
                 if capabilities.contains(wl_seat::Capability::Keyboard) && self.keyboard.is_none() {
                     self.keyboard = Some(super::keyboard::init_keyboard(
-                        seat.get_keyboard().unwrap(),
+                        &seat,
                         self.sink.clone(),
+                        self.events_loop_proxy.clone(),
+                        self.modifiers_tracker.clone(),
                     ))
                 }
                 // destroy keyboard if applicable
@@ -357,7 +385,7 @@ impl Implementation<Proxy<wl_seat::WlSeat>, wl_seat::Event> for SeatData {
                 // create touch if applicable
                 if capabilities.contains(wl_seat::Capability::Touch) && self.touch.is_none() {
                     self.touch = Some(super::touch::implement_touch(
-                        seat.get_touch().unwrap(),
+                        &seat,
                         self.sink.clone(),
                         self.store.clone(),
                     ))

src/platform/linux/wayland/keyboard.rs

@@ -1,81 +1,121 @@
 use std::sync::{Arc, Mutex};
 
+use super::{make_wid, DeviceId, EventsLoopProxy, EventsLoopSink};
+use sctk::keyboard::{
+    self, map_keyboard_auto_with_repeat, Event as KbEvent, KeyRepeatEvent, KeyRepeatKind,
+};
+use sctk::reexports::client::protocol::wl_keyboard;
+use sctk::reexports::client::Proxy;
+use sctk::reexports::client::protocol::wl_seat;
+use sctk::reexports::client::protocol::wl_seat::RequestsTrait as SeatRequests;
+
 use {ElementState, KeyboardInput, ModifiersState, VirtualKeyCode, WindowEvent};
 
-use super::{make_wid, DeviceId, EventsLoopSink};
-use sctk::keyboard::{self, map_keyboard_auto, Event as KbEvent};
-use sctk::reexports::client::{NewProxy, Proxy};
-use sctk::reexports::client::protocol::wl_keyboard;
-
 pub fn init_keyboard(
-    keyboard: NewProxy<wl_keyboard::WlKeyboard>,
+    seat: &Proxy<wl_seat::WlSeat>,
     sink: Arc<Mutex<EventsLoopSink>>,
+    events_loop_proxy: EventsLoopProxy,
+    modifiers_tracker: Arc<Mutex<ModifiersState>>,
 ) -> Proxy<wl_keyboard::WlKeyboard> {
-    // { variables to be captured by the closure
-    let mut target = None;
+    // { variables to be captured by the closures
+    let target = Arc::new(Mutex::new(None));
     let my_sink = sink.clone();
+    let repeat_sink = sink.clone();
+    let repeat_target = target.clone();
+    let my_modifiers = modifiers_tracker.clone();
     // }
-    let ret = map_keyboard_auto(keyboard, move |evt: KbEvent, _| match evt {
-        KbEvent::Enter { surface, .. } => {
-            let wid = make_wid(&surface);
-            my_sink
-                .lock()
-                .unwrap()
-                .send_event(WindowEvent::Focused(true), wid);
-            target = Some(wid);
-        }
-        KbEvent::Leave { surface, .. } => {
-            let wid = make_wid(&surface);
-            my_sink
-                .lock()
-                .unwrap()
-                .send_event(WindowEvent::Focused(false), wid);
-            target = None;
-        }
-        KbEvent::Key {
-            modifiers,
-            rawkey,
-            keysym,
-            state,
-            utf8,
-            ..
-        } => {
-            if let Some(wid) = target {
-                let state = match state {
-                    wl_keyboard::KeyState::Pressed => ElementState::Pressed,
-                    wl_keyboard::KeyState::Released => ElementState::Released,
-                };
-                let vkcode = key_to_vkey(rawkey, keysym);
-                let mut guard = my_sink.lock().unwrap();
+    let ret = map_keyboard_auto_with_repeat(
+        seat,
+        KeyRepeatKind::System,
+        move |evt: KbEvent, _| match evt {
+            KbEvent::Enter { surface, .. } => {
+                let wid = make_wid(&surface);
+                my_sink
+                    .lock()
+                    .unwrap()
+                    .send_event(WindowEvent::Focused(true), wid);
+                *target.lock().unwrap() = Some(wid);
+            }
+            KbEvent::Leave { surface, .. } => {
+                let wid = make_wid(&surface);
+                my_sink
+                    .lock()
+                    .unwrap()
+                    .send_event(WindowEvent::Focused(false), wid);
+                *target.lock().unwrap() = None;
+            }
+            KbEvent::Key {
+                rawkey,
+                keysym,
+                state,
+                utf8,
+                ..
+            } => {
+                if let Some(wid) = *target.lock().unwrap() {
+                    let state = match state {
+                        wl_keyboard::KeyState::Pressed => ElementState::Pressed,
+                        wl_keyboard::KeyState::Released => ElementState::Released,
+                    };
+                    let vkcode = key_to_vkey(rawkey, keysym);
+                    let mut guard = my_sink.lock().unwrap();
+                    guard.send_event(
+                        WindowEvent::KeyboardInput {
+                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                            input: KeyboardInput {
+                                state: state,
+                                scancode: rawkey,
+                                virtual_keycode: vkcode,
+                                modifiers: modifiers_tracker.lock().unwrap().clone(),
+                            },
+                        },
+                        wid,
+                    );
+                    // send char event only on key press, not release
+                    if let ElementState::Released = state {
+                        return;
+                    }
+                    if let Some(txt) = utf8 {
+                        for chr in txt.chars() {
+                            guard.send_event(WindowEvent::ReceivedCharacter(chr), wid);
+                        }
+                    }
+                }
+            }
+            KbEvent::RepeatInfo { .. } => { /* Handled by smithay client toolkit */ }
+            KbEvent::Modifiers { modifiers: event_modifiers } => {
+                *modifiers_tracker.lock().unwrap() = event_modifiers.into()
+            }
+        },
+        move |repeat_event: KeyRepeatEvent, _| {
+            if let Some(wid) = *repeat_target.lock().unwrap() {
+                let state = ElementState::Pressed;
+                let vkcode = key_to_vkey(repeat_event.rawkey, repeat_event.keysym);
+                let mut guard = repeat_sink.lock().unwrap();
                 guard.send_event(
                     WindowEvent::KeyboardInput {
                         device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
                         input: KeyboardInput {
                             state: state,
-                            scancode: rawkey,
+                            scancode: repeat_event.rawkey,
                             virtual_keycode: vkcode,
-                            modifiers: modifiers.into(),
+                            modifiers: my_modifiers.lock().unwrap().clone(),
                         },
                     },
                     wid,
                 );
-                // send char event only on key press, not release
-                if let ElementState::Released = state {
-                    return;
-                }
-                if let Some(txt) = utf8 {
+                if let Some(txt) = repeat_event.utf8 {
                     for chr in txt.chars() {
                         guard.send_event(WindowEvent::ReceivedCharacter(chr), wid);
                     }
                 }
+                events_loop_proxy.wakeup().unwrap();
             }
-        }
-        KbEvent::RepeatInfo { .. } => { /* TODO: handle repeat info */ }
-    });
+        },
+    );
 
     match ret {
         Ok(keyboard) => keyboard,
-        Err((_, keyboard)) => {
+        Err(_) => {
             // This is a fallback impl if libxkbcommon was not available
             // This case should probably never happen, as most wayland
             // compositors _need_ libxkbcommon anyway...
@@ -87,45 +127,47 @@ pub fn init_keyboard(
             let mut target = None;
             let my_sink = sink;
             // }
-            keyboard.implement(move |evt, _| match evt {
-                wl_keyboard::Event::Enter { surface, .. } => {
-                    let wid = make_wid(&surface);
-                    my_sink
-                        .lock()
-                        .unwrap()
-                        .send_event(WindowEvent::Focused(true), wid);
-                    target = Some(wid);
-                }
-                wl_keyboard::Event::Leave { surface, .. } => {
-                    let wid = make_wid(&surface);
-                    my_sink
-                        .lock()
-                        .unwrap()
-                        .send_event(WindowEvent::Focused(false), wid);
-                    target = None;
-                }
-                wl_keyboard::Event::Key { key, state, .. } => {
-                    if let Some(wid) = target {
-                        let state = match state {
-                            wl_keyboard::KeyState::Pressed => ElementState::Pressed,
-                            wl_keyboard::KeyState::Released => ElementState::Released,
-                        };
-                        my_sink.lock().unwrap().send_event(
-                            WindowEvent::KeyboardInput {
-                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                                input: KeyboardInput {
-                                    state: state,
-                                    scancode: key,
-                                    virtual_keycode: None,
-                                    modifiers: ModifiersState::default(),
-                                },
-                            },
-                            wid,
-                        );
+            seat.get_keyboard(|keyboard| {
+                keyboard.implement(move |evt, _| match evt {
+                    wl_keyboard::Event::Enter { surface, .. } => {
+                        let wid = make_wid(&surface);
+                        my_sink
+                            .lock()
+                            .unwrap()
+                            .send_event(WindowEvent::Focused(true), wid);
+                        target = Some(wid);
                     }
-                }
-                _ => (),
-            })
+                    wl_keyboard::Event::Leave { surface, .. } => {
+                        let wid = make_wid(&surface);
+                        my_sink
+                            .lock()
+                            .unwrap()
+                            .send_event(WindowEvent::Focused(false), wid);
+                        target = None;
+                    }
+                    wl_keyboard::Event::Key { key, state, .. } => {
+                        if let Some(wid) = target {
+                            let state = match state {
+                                wl_keyboard::KeyState::Pressed => ElementState::Pressed,
+                                wl_keyboard::KeyState::Released => ElementState::Released,
+                            };
+                            my_sink.lock().unwrap().send_event(
+                                WindowEvent::KeyboardInput {
+                                    device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                    input: KeyboardInput {
+                                        state: state,
+                                        scancode: key,
+                                        virtual_keycode: None,
+                                        modifiers: ModifiersState::default(),
+                                    },
+                                },
+                                wid,
+                            );
+                        }
+                    }
+                    _ => (),
+                }, ())
+            }).unwrap()
         }
     }
 }
@@ -193,6 +235,15 @@ fn keysym_to_vkey(keysym: u32) -> Option<VirtualKeyCode> {
         keysyms::XKB_KEY_F13 => Some(VirtualKeyCode::F13),
         keysyms::XKB_KEY_F14 => Some(VirtualKeyCode::F14),
         keysyms::XKB_KEY_F15 => Some(VirtualKeyCode::F15),
+        keysyms::XKB_KEY_F16 => Some(VirtualKeyCode::F16),
+        keysyms::XKB_KEY_F17 => Some(VirtualKeyCode::F17),
+        keysyms::XKB_KEY_F18 => Some(VirtualKeyCode::F18),
+        keysyms::XKB_KEY_F19 => Some(VirtualKeyCode::F19),
+        keysyms::XKB_KEY_F20 => Some(VirtualKeyCode::F20),
+        keysyms::XKB_KEY_F21 => Some(VirtualKeyCode::F21),
+        keysyms::XKB_KEY_F22 => Some(VirtualKeyCode::F22),
+        keysyms::XKB_KEY_F23 => Some(VirtualKeyCode::F23),
+        keysyms::XKB_KEY_F24 => Some(VirtualKeyCode::F24),
         // flow control
         keysyms::XKB_KEY_Print => Some(VirtualKeyCode::Snapshot),
         keysyms::XKB_KEY_Scroll_Lock => Some(VirtualKeyCode::Scroll),

src/platform/linux/wayland/mod.rs

@@ -1,5 +1,5 @@
 #![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd",
-           target_os = "openbsd"))]
+           target_os = "netbsd", target_os = "openbsd"))]
 
 pub use self::window::Window;
 pub use self::event_loop::{EventsLoop, EventsLoopProxy, EventsLoopSink, MonitorId};

src/platform/linux/wayland/pointer.rs

@@ -7,184 +7,183 @@ use super::DeviceId;
 use super::event_loop::EventsLoopSink;
 use super::window::WindowStore;
 
-use sctk::reexports::client::{NewProxy, Proxy};
+use sctk::reexports::client::Proxy;
 use sctk::reexports::client::protocol::wl_pointer::{self, Event as PtrEvent, WlPointer};
+use sctk::reexports::client::protocol::wl_seat;
+use sctk::reexports::client::protocol::wl_seat::RequestsTrait as SeatRequests;
 
 pub fn implement_pointer(
-    pointer: NewProxy<WlPointer>,
+    seat: &Proxy<wl_seat::WlSeat>,
     sink: Arc<Mutex<EventsLoopSink>>,
     store: Arc<Mutex<WindowStore>>,
+    modifiers_tracker: Arc<Mutex<ModifiersState>>,
 ) -> Proxy<WlPointer> {
     let mut mouse_focus = None;
     let mut axis_buffer = None;
     let mut axis_discrete_buffer = None;
     let mut axis_state = TouchPhase::Ended;
 
-    pointer.implement(move |evt, pointer: Proxy<_>| {
-        let mut sink = sink.lock().unwrap();
-        let store = store.lock().unwrap();
-        match evt {
-            PtrEvent::Enter {
-                surface,
-                surface_x,
-                surface_y,
-                ..
-            } => {
-                let wid = store.find_wid(&surface);
-                if let Some(wid) = wid {
-                    mouse_focus = Some(wid);
-                    sink.send_event(
-                        WindowEvent::CursorEntered {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                        },
-                        wid,
-                    );
-                    sink.send_event(
-                        WindowEvent::CursorMoved {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            position: (surface_x, surface_y).into(),
-                            // TODO: replace dummy value with actual modifier state
-                            modifiers: ModifiersState::default(),
-                        },
-                        wid,
-                    );
-                }
-            }
-            PtrEvent::Leave { surface, .. } => {
-                mouse_focus = None;
-                let wid = store.find_wid(&surface);
-                if let Some(wid) = wid {
-                    sink.send_event(
-                        WindowEvent::CursorLeft {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                        },
-                        wid,
-                    );
-                }
-            }
-            PtrEvent::Motion {
-                surface_x,
-                surface_y,
-                ..
-            } => {
-                if let Some(wid) = mouse_focus {
-                    sink.send_event(
-                        WindowEvent::CursorMoved {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            position: (surface_x, surface_y).into(),
-                            // TODO: replace dummy value with actual modifier state
-                            modifiers: ModifiersState::default(),
-                        },
-                        wid,
-                    );
-                }
-            }
-            PtrEvent::Button { button, state, .. } => {
-                if let Some(wid) = mouse_focus {
-                    let state = match state {
-                        wl_pointer::ButtonState::Pressed => ElementState::Pressed,
-                        wl_pointer::ButtonState::Released => ElementState::Released,
-                    };
-                    let button = match button {
-                        0x110 => MouseButton::Left,
-                        0x111 => MouseButton::Right,
-                        0x112 => MouseButton::Middle,
-                        // TODO figure out the translation ?
-                        _ => return,
-                    };
-                    sink.send_event(
-                        WindowEvent::MouseInput {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            state: state,
-                            button: button,
-                            // TODO: replace dummy value with actual modifier state
-                            modifiers: ModifiersState::default(),
-                        },
-                        wid,
-                    );
-                }
-            }
-            PtrEvent::Axis { axis, value, .. } => {
-                if let Some(wid) = mouse_focus {
-                    if pointer.version() < 5 {
-                        let (mut x, mut y) = (0.0, 0.0);
-                        // old seat compatibility
-                        match axis {
-                            // wayland vertical sign convention is the inverse of winit
-                            wl_pointer::Axis::VerticalScroll => y -= value as f32,
-                            wl_pointer::Axis::HorizontalScroll => x += value as f32,
-                        }
+    seat.get_pointer(|pointer| {
+        pointer.implement(move |evt, pointer| {
+            let mut sink = sink.lock().unwrap();
+            let store = store.lock().unwrap();
+            match evt {
+                PtrEvent::Enter {
+                    surface,
+                    surface_x,
+                    surface_y,
+                    ..
+                } => {
+                    let wid = store.find_wid(&surface);
+                    if let Some(wid) = wid {
+                        mouse_focus = Some(wid);
                         sink.send_event(
-                            WindowEvent::MouseWheel {
+                            WindowEvent::CursorEntered {
                                 device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                                delta: MouseScrollDelta::PixelDelta((x as f64, y as f64).into()),
-                                phase: TouchPhase::Moved,
-                                // TODO: replace dummy value with actual modifier state
-                                modifiers: ModifiersState::default(),
                             },
                             wid,
                         );
-                    } else {
-                        let (mut x, mut y) = axis_buffer.unwrap_or((0.0, 0.0));
-                        match axis {
-                            // wayland vertical sign convention is the inverse of winit
-                            wl_pointer::Axis::VerticalScroll => y -= value as f32,
-                            wl_pointer::Axis::HorizontalScroll => x += value as f32,
-                        }
-                        axis_buffer = Some((x, y));
-                        axis_state = match axis_state {
-                            TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
-                            _ => TouchPhase::Started,
-                        }
-                    }
-                }
-            }
-            PtrEvent::Frame => {
-                let axis_buffer = axis_buffer.take();
-                let axis_discrete_buffer = axis_discrete_buffer.take();
-                if let Some(wid) = mouse_focus {
-                    if let Some((x, y)) = axis_discrete_buffer {
                         sink.send_event(
-                            WindowEvent::MouseWheel {
+                            WindowEvent::CursorMoved {
                                 device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                                delta: MouseScrollDelta::LineDelta(x as f32, y as f32),
-                                phase: axis_state,
-                                // TODO: replace dummy value with actual modifier state
-                                modifiers: ModifiersState::default(),
-                            },
-                            wid,
-                        );
-                    } else if let Some((x, y)) = axis_buffer {
-                        sink.send_event(
-                            WindowEvent::MouseWheel {
-                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                                delta: MouseScrollDelta::PixelDelta((x as f64, y as f64).into()),
-                                phase: axis_state,
-                                // TODO: replace dummy value with actual modifier state
-                                modifiers: ModifiersState::default(),
+                                position: (surface_x, surface_y).into(),
+                                modifiers: modifiers_tracker.lock().unwrap().clone(),
                             },
                             wid,
                         );
                     }
                 }
-            }
-            PtrEvent::AxisSource { .. } => (),
-            PtrEvent::AxisStop { .. } => {
-                axis_state = TouchPhase::Ended;
-            }
-            PtrEvent::AxisDiscrete { axis, discrete } => {
-                let (mut x, mut y) = axis_discrete_buffer.unwrap_or((0, 0));
-                match axis {
-                    // wayland vertical sign convention is the inverse of winit
-                    wl_pointer::Axis::VerticalScroll => y -= discrete,
-                    wl_pointer::Axis::HorizontalScroll => x += discrete,
+                PtrEvent::Leave { surface, .. } => {
+                    mouse_focus = None;
+                    let wid = store.find_wid(&surface);
+                    if let Some(wid) = wid {
+                        sink.send_event(
+                            WindowEvent::CursorLeft {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                            },
+                            wid,
+                        );
+                    }
                 }
-                axis_discrete_buffer = Some((x, y));
-                axis_state = match axis_state {
-                    TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
-                    _ => TouchPhase::Started,
+                PtrEvent::Motion {
+                    surface_x,
+                    surface_y,
+                    ..
+                } => {
+                    if let Some(wid) = mouse_focus {
+                        sink.send_event(
+                            WindowEvent::CursorMoved {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                position: (surface_x, surface_y).into(),
+                                modifiers: modifiers_tracker.lock().unwrap().clone(),
+                            },
+                            wid,
+                        );
+                    }
+                }
+                PtrEvent::Button { button, state, .. } => {
+                    if let Some(wid) = mouse_focus {
+                        let state = match state {
+                            wl_pointer::ButtonState::Pressed => ElementState::Pressed,
+                            wl_pointer::ButtonState::Released => ElementState::Released,
+                        };
+                        let button = match button {
+                            0x110 => MouseButton::Left,
+                            0x111 => MouseButton::Right,
+                            0x112 => MouseButton::Middle,
+                            // TODO figure out the translation ?
+                            _ => return,
+                        };
+                        sink.send_event(
+                            WindowEvent::MouseInput {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                state: state,
+                                button: button,
+                                modifiers: modifiers_tracker.lock().unwrap().clone(),
+                            },
+                            wid,
+                        );
+                    }
+                }
+                PtrEvent::Axis { axis, value, .. } => {
+                    if let Some(wid) = mouse_focus {
+                        if pointer.version() < 5 {
+                            let (mut x, mut y) = (0.0, 0.0);
+                            // old seat compatibility
+                            match axis {
+                                // wayland vertical sign convention is the inverse of winit
+                                wl_pointer::Axis::VerticalScroll => y -= value as f32,
+                                wl_pointer::Axis::HorizontalScroll => x += value as f32,
+                            }
+                            sink.send_event(
+                                WindowEvent::MouseWheel {
+                                    device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                    delta: MouseScrollDelta::PixelDelta((x as f64, y as f64).into()),
+                                    phase: TouchPhase::Moved,
+                                    modifiers: modifiers_tracker.lock().unwrap().clone(),
+                                },
+                                wid,
+                            );
+                        } else {
+                            let (mut x, mut y) = axis_buffer.unwrap_or((0.0, 0.0));
+                            match axis {
+                                // wayland vertical sign convention is the inverse of winit
+                                wl_pointer::Axis::VerticalScroll => y -= value as f32,
+                                wl_pointer::Axis::HorizontalScroll => x += value as f32,
+                            }
+                            axis_buffer = Some((x, y));
+                            axis_state = match axis_state {
+                                TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
+                                _ => TouchPhase::Started,
+                            }
+                        }
+                    }
+                }
+                PtrEvent::Frame => {
+                    let axis_buffer = axis_buffer.take();
+                    let axis_discrete_buffer = axis_discrete_buffer.take();
+                    if let Some(wid) = mouse_focus {
+                        if let Some((x, y)) = axis_discrete_buffer {
+                            sink.send_event(
+                                WindowEvent::MouseWheel {
+                                    device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                    delta: MouseScrollDelta::LineDelta(x as f32, y as f32),
+                                    phase: axis_state,
+                                    modifiers: modifiers_tracker.lock().unwrap().clone(),
+                                },
+                                wid,
+                            );
+                        } else if let Some((x, y)) = axis_buffer {
+                            sink.send_event(
+                                WindowEvent::MouseWheel {
+                                    device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                    delta: MouseScrollDelta::PixelDelta((x as f64, y as f64).into()),
+                                    phase: axis_state,
+                                    modifiers: modifiers_tracker.lock().unwrap().clone(),
+                                },
+                                wid,
+                            );
+                        }
+                    }
+                }
+                PtrEvent::AxisSource { .. } => (),
+                PtrEvent::AxisStop { .. } => {
+                    axis_state = TouchPhase::Ended;
+                }
+                PtrEvent::AxisDiscrete { axis, discrete } => {
+                    let (mut x, mut y) = axis_discrete_buffer.unwrap_or((0, 0));
+                    match axis {
+                        // wayland vertical sign convention is the inverse of winit
+                        wl_pointer::Axis::VerticalScroll => y -= discrete,
+                        wl_pointer::Axis::HorizontalScroll => x += discrete,
+                    }
+                    axis_discrete_buffer = Some((x, y));
+                    axis_state = match axis_state {
+                        TouchPhase::Started | TouchPhase::Moved => TouchPhase::Moved,
+                        _ => TouchPhase::Started,
+                    }
                 }
             }
-        }
-    })
+        }, ())
+    }).unwrap()
 }

src/platform/linux/wayland/touch.rs

@@ -6,8 +6,10 @@ use super::{DeviceId, WindowId};
 use super::event_loop::EventsLoopSink;
 use super::window::WindowStore;
 
-use sctk::reexports::client::{NewProxy, Proxy};
+use sctk::reexports::client::Proxy;
 use sctk::reexports::client::protocol::wl_touch::{Event as TouchEvent, WlTouch};
+use sctk::reexports::client::protocol::wl_seat;
+use sctk::reexports::client::protocol::wl_seat::RequestsTrait as SeatRequests;
 
 struct TouchPoint {
     wid: WindowId,
@@ -16,78 +18,80 @@ struct TouchPoint {
 }
 
 pub(crate) fn implement_touch(
-    touch: NewProxy<WlTouch>,
+    seat: &Proxy<wl_seat::WlSeat>,
     sink: Arc<Mutex<EventsLoopSink>>,
     store: Arc<Mutex<WindowStore>>,
 ) -> Proxy<WlTouch> {
     let mut pending_ids = Vec::new();
-    touch.implement(move |evt, _| {
-        let mut sink = sink.lock().unwrap();
-        let store = store.lock().unwrap();
-        match evt {
-            TouchEvent::Down {
-                surface, id, x, y, ..
-            } => {
-                let wid = store.find_wid(&surface);
-                if let Some(wid) = wid {
-                    sink.send_event(
-                        WindowEvent::Touch(::Touch {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            phase: TouchPhase::Started,
-                            location: (x, y).into(),
-                            id: id as u64,
-                        }),
-                        wid,
-                    );
-                    pending_ids.push(TouchPoint {
-                        wid: wid,
-                        location: (x, y),
-                        id: id,
-                    });
+    seat.get_touch(|touch| {
+        touch.implement(move |evt, _| {
+            let mut sink = sink.lock().unwrap();
+            let store = store.lock().unwrap();
+            match evt {
+                TouchEvent::Down {
+                    surface, id, x, y, ..
+                } => {
+                    let wid = store.find_wid(&surface);
+                    if let Some(wid) = wid {
+                        sink.send_event(
+                            WindowEvent::Touch(::Touch {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                phase: TouchPhase::Started,
+                                location: (x, y).into(),
+                                id: id as u64,
+                            }),
+                            wid,
+                        );
+                        pending_ids.push(TouchPoint {
+                            wid: wid,
+                            location: (x, y),
+                            id: id,
+                        });
+                    }
                 }
-            }
-            TouchEvent::Up { id, .. } => {
-                let idx = pending_ids.iter().position(|p| p.id == id);
-                if let Some(idx) = idx {
-                    let pt = pending_ids.remove(idx);
+                TouchEvent::Up { id, .. } => {
+                    let idx = pending_ids.iter().position(|p| p.id == id);
+                    if let Some(idx) = idx {
+                        let pt = pending_ids.remove(idx);
+                        sink.send_event(
+                            WindowEvent::Touch(::Touch {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                phase: TouchPhase::Ended,
+                                location: pt.location.into(),
+                                id: id as u64,
+                            }),
+                            pt.wid,
+                        );
+                    }
+                }
+                TouchEvent::Motion { id, x, y, .. } => {
+                    let pt = pending_ids.iter_mut().find(|p| p.id == id);
+                    if let Some(pt) = pt {
+                        pt.location = (x, y);
+                        sink.send_event(
+                            WindowEvent::Touch(::Touch {
+                                device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
+                                phase: TouchPhase::Moved,
+                                location: (x, y).into(),
+                                id: id as u64,
+                            }),
+                            pt.wid,
+                        );
+                    }
+                }
+                TouchEvent::Frame => (),
+                TouchEvent::Cancel => for pt in pending_ids.drain(..) {
                     sink.send_event(
                         WindowEvent::Touch(::Touch {
                             device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            phase: TouchPhase::Ended,
+                            phase: TouchPhase::Cancelled,
                             location: pt.location.into(),
-                            id: id as u64,
+                            id: pt.id as u64,
                         }),
                         pt.wid,
                     );
-                }
+                },
             }
-            TouchEvent::Motion { id, x, y, .. } => {
-                let pt = pending_ids.iter_mut().find(|p| p.id == id);
-                if let Some(pt) = pt {
-                    pt.location = (x, y);
-                    sink.send_event(
-                        WindowEvent::Touch(::Touch {
-                            device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                            phase: TouchPhase::Moved,
-                            location: (x, y).into(),
-                            id: id as u64,
-                        }),
-                        pt.wid,
-                    );
-                }
-            }
-            TouchEvent::Frame => (),
-            TouchEvent::Cancel => for pt in pending_ids.drain(..) {
-                sink.send_event(
-                    WindowEvent::Touch(::Touch {
-                        device_id: ::DeviceId(::platform::DeviceId::Wayland(DeviceId)),
-                        phase: TouchPhase::Cancelled,
-                        location: pt.location.into(),
-                        id: pt.id as u64,
-                    }),
-                    pt.wid,
-                );
-            },
-        }
-    })
+        }, ())
+    }).unwrap()
 }

src/platform/linux/wayland/window.rs

@@ -6,7 +6,7 @@ use dpi::{LogicalPosition, LogicalSize};
 use platform::MonitorId as PlatformMonitorId;
 use window::MonitorId as RootMonitorId;
 
-use sctk::window::{BasicFrame, Event as WEvent, Window as SWindow};
+use sctk::window::{ConceptFrame, Event as WEvent, Window as SWindow};
 use sctk::reexports::client::{Display, Proxy};
 use sctk::reexports::client::protocol::{wl_seat, wl_surface, wl_output};
 use sctk::reexports::client::protocol::wl_compositor::RequestsTrait as CompositorRequests;
@@ -18,7 +18,7 @@ use platform::platform::wayland::event_loop::{get_available_monitors, get_primar
 
 pub struct Window {
     surface: Proxy<wl_surface::WlSurface>,
-    frame: Arc<Mutex<SWindow<BasicFrame>>>,
+    frame: Arc<Mutex<SWindow<ConceptFrame>>>,
     monitors: Arc<Mutex<MonitorList>>, // Monitors this window is currently on
     outputs: OutputMgr, // Access to info for all monitors
     size: Arc<Mutex<(u32, u32)>>,
@@ -36,11 +36,11 @@ impl Window {
         // monitor tracking
         let monitor_list = Arc::new(Mutex::new(MonitorList::new()));
 
-        let surface = evlp.env.compositor.create_surface().unwrap().implement({
+        let surface = evlp.env.compositor.create_surface(|surface| {
             let list = monitor_list.clone();
             let omgr = evlp.env.outputs.clone();
             let window_store = evlp.store.clone();
-            move |event, surface: Proxy<wl_surface::WlSurface>| match event {
+            surface.implement(move |event, surface| match event {
                 wl_surface::Event::Enter { output } => {
                     let dpi_change = list.lock().unwrap().add_output(MonitorId {
                         proxy: output,
@@ -64,19 +64,16 @@ impl Window {
                         }
                     }
                 }
-            }
-        });
+            }, ())
+        }).unwrap();
 
         let window_store = evlp.store.clone();
         let my_surface = surface.clone();
-        let mut frame = SWindow::<BasicFrame>::init(
+        let mut frame = SWindow::<ConceptFrame>::init_from_env(
+            &evlp.env,
             surface.clone(),
             (width, height),
-            &evlp.env.compositor,
-            &evlp.env.subcompositor,
-            &evlp.env.shm,
-            &evlp.env.shell,
-            move |event, ()| match event {
+            move |event| match event {
                 WEvent::Configure { new_size, .. } => {
                     let mut store = window_store.lock().unwrap();
                     for window in &mut store.windows {
@@ -327,7 +324,7 @@ struct InternalWindow {
     need_frame_refresh: Arc<Mutex<bool>>,
     closed: bool,
     kill_switch: Arc<Mutex<bool>>,
-    frame: Weak<Mutex<SWindow<BasicFrame>>>,
+    frame: Weak<Mutex<SWindow<ConceptFrame>>>,
     current_dpi: i32,
     new_dpi: Option<i32>
 }
@@ -385,7 +382,7 @@ impl WindowStore {
 
     pub fn for_each<F>(&mut self, mut f: F)
     where
-        F: FnMut(Option<(u32, u32)>, &mut (u32, u32), Option<i32>, bool, bool, bool, WindowId, Option<&mut SWindow<BasicFrame>>),
+        F: FnMut(Option<(u32, u32)>, &mut (u32, u32), Option<i32>, bool, bool, bool, WindowId, Option<&mut SWindow<ConceptFrame>>),
     {
         for window in &mut self.windows {
             let opt_arc = window.frame.upgrade();

src/platform/linux/x11/events.rs

@@ -117,23 +117,23 @@ pub fn keysym_to_element(keysym: libc::c_uint) -> Option<VirtualKeyCode> {
         //ffi::XK_L4 => events::VirtualKeyCode::L4,
         ffi::XK_F15 => events::VirtualKeyCode::F15,
         //ffi::XK_L5 => events::VirtualKeyCode::L5,
-        //ffi::XK_F16 => events::VirtualKeyCode::F16,
+        ffi::XK_F16 => events::VirtualKeyCode::F16,
         //ffi::XK_L6 => events::VirtualKeyCode::L6,
-        //ffi::XK_F17 => events::VirtualKeyCode::F17,
+        ffi::XK_F17 => events::VirtualKeyCode::F17,
         //ffi::XK_L7 => events::VirtualKeyCode::L7,
-        //ffi::XK_F18 => events::VirtualKeyCode::F18,
+        ffi::XK_F18 => events::VirtualKeyCode::F18,
         //ffi::XK_L8 => events::VirtualKeyCode::L8,
-        //ffi::XK_F19 => events::VirtualKeyCode::F19,
+        ffi::XK_F19 => events::VirtualKeyCode::F19,
         //ffi::XK_L9 => events::VirtualKeyCode::L9,
-        //ffi::XK_F20 => events::VirtualKeyCode::F20,
+        ffi::XK_F20 => events::VirtualKeyCode::F20,
         //ffi::XK_L10 => events::VirtualKeyCode::L10,
-        //ffi::XK_F21 => events::VirtualKeyCode::F21,
+        ffi::XK_F21 => events::VirtualKeyCode::F21,
         //ffi::XK_R1 => events::VirtualKeyCode::R1,
-        //ffi::XK_F22 => events::VirtualKeyCode::F22,
+        ffi::XK_F22 => events::VirtualKeyCode::F22,
         //ffi::XK_R2 => events::VirtualKeyCode::R2,
-        //ffi::XK_F23 => events::VirtualKeyCode::F23,
+        ffi::XK_F23 => events::VirtualKeyCode::F23,
         //ffi::XK_R3 => events::VirtualKeyCode::R3,
-        //ffi::XK_F24 => events::VirtualKeyCode::F24,
+        ffi::XK_F24 => events::VirtualKeyCode::F24,
         //ffi::XK_R4 => events::VirtualKeyCode::R4,
         //ffi::XK_F25 => events::VirtualKeyCode::F25,
         //ffi::XK_R5 => events::VirtualKeyCode::R5,

src/platform/linux/x11/mod.rs

@@ -1,4 +1,4 @@
-#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#![cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 
 pub mod ffi;
 mod events;
@@ -278,25 +278,25 @@ impl EventsLoop {
                     }
                 } else if client_msg.message_type == self.dnd.atoms.position {
                     // This event occurs every time the mouse moves while a file's being dragged
-                    // over our window. We emit HoveredFile in response; while the Mac OS X backend
-                    // does that upon a drag entering, XDnD doesn't have access to the actual drop
+                    // over our window. We emit HoveredFile in response; while the macOS backend
+                    // does that upon a drag entering, XDND doesn't have access to the actual drop
                     // data until this event. For parity with other platforms, we only emit
-                    // HoveredFile the first time, though if winit's API is later extended to
-                    // supply position updates with HoveredFile or another event, implementing
+                    // `HoveredFile` the first time, though if winit's API is later extended to
+                    // supply position updates with `HoveredFile` or another event, implementing
                     // that here would be trivial.
 
                     let source_window = client_msg.data.get_long(0) as c_ulong;
 
-                    // Equivalent to (x << shift) | y
-                    // where shift = mem::size_of::<c_short>() * 8
+                    // Equivalent to `(x << shift) | y`
+                    // where `shift = mem::size_of::<c_short>() * 8`
                     // Note that coordinates are in "desktop space", not "window space"
-                    // (in x11 parlance, they're root window coordinates)
+                    // (in X11 parlance, they're root window coordinates)
                     //let packed_coordinates = client_msg.data.get_long(2);
                     //let shift = mem::size_of::<libc::c_short>() * 8;
                     //let x = packed_coordinates >> shift;
                     //let y = packed_coordinates & !(x << shift);
 
-                    // By our own state flow, version should never be None at this point.
+                    // By our own state flow, `version` should never be `None` at this point.
                     let version = self.dnd.version.unwrap_or(5);
 
                     // Action is specified in versions 2 and up, though we don't need it anyway.
@@ -318,23 +318,21 @@ impl EventsLoop {
                                     // In version 0, time isn't specified
                                     ffi::CurrentTime
                                 };
-                                // This results in the SelectionNotify event below
+                                // This results in the `SelectionNotify` event below
                                 self.dnd.convert_selection(window, time);
                             }
                             self.dnd.send_status(window, source_window, DndState::Accepted)
-                                .expect("Failed to send XDnD status message.");
+                                .expect("Failed to send `XdndStatus` message.");
                         }
                     } else {
                         unsafe {
                             self.dnd.send_status(window, source_window, DndState::Rejected)
-                                .expect("Failed to send XDnD status message.");
-                            self.dnd.send_finished(window, source_window, DndState::Rejected)
-                                .expect("Failed to send XDnD finished message.");
+                                .expect("Failed to send `XdndStatus` message.");
                         }
                         self.dnd.reset();
                     }
                 } else if client_msg.message_type == self.dnd.atoms.drop {
-                    if let Some(source_window) = self.dnd.source_window {
+                    let (source_window, state) = if let Some(source_window) = self.dnd.source_window {
                         if let Some(Ok(ref path_list)) = self.dnd.result {
                             for path in path_list {
                                 callback(Event::WindowEvent {
@@ -343,10 +341,16 @@ impl EventsLoop {
                                 });
                             }
                         }
-                        unsafe {
-                            self.dnd.send_finished(window, source_window, DndState::Accepted)
-                                .expect("Failed to send XDnD finished message.");
-                        }
+                        (source_window, DndState::Accepted)
+                    } else {
+                        // `source_window` won't be part of our DND state if we already rejected the drop in our
+                        // `XdndPosition` handler.
+                        let source_window = client_msg.data.get_long(0) as c_ulong;
+                        (source_window, DndState::Rejected)
+                    };
+                    unsafe {
+                        self.dnd.send_finished(window, source_window, state)
+                            .expect("Failed to send `XdndFinished` message.");
                     }
                     self.dnd.reset();
                 } else if client_msg.message_type == self.dnd.atoms.leave {
@@ -412,10 +416,10 @@ impl EventsLoop {
                     let new_inner_size = (xev.width as u32, xev.height as u32);
                     let new_inner_position = (xev.x as i32, xev.y as i32);
 
-                    let monitor = window.get_current_monitor(); // This must be done *before* locking!
+                    let mut monitor = window.get_current_monitor(); // This must be done *before* locking!
                     let mut shared_state_lock = window.shared_state.lock();
 
-                    let (resized, moved) = {
+                    let (mut resized, moved) = {
                         let resized = util::maybe_change(&mut shared_state_lock.size, new_inner_size);
                         let moved = if is_synthetic {
                             util::maybe_change(&mut shared_state_lock.inner_position, new_inner_position)
@@ -435,32 +439,8 @@ impl EventsLoop {
                         (resized, moved)
                     };
 
-                    // This is a hack to ensure that the DPI adjusted resize is actually applied on all WMs. KWin
-                    // doesn't need this, but Xfwm does.
-                    if let Some(adjusted_size) = shared_state_lock.dpi_adjusted {
-                        let rounded_size = (adjusted_size.0.round() as u32, adjusted_size.1.round() as u32);
-                        if new_inner_size == rounded_size {
-                            // When this finally happens, the event will not be synthetic.
-                            shared_state_lock.dpi_adjusted = None;
-                        } else {
-                            unsafe {
-                                (self.xconn.xlib.XResizeWindow)(
-                                    self.xconn.display,
-                                    xwindow,
-                                    rounded_size.0 as c_uint,
-                                    rounded_size.1 as c_uint,
-                                );
-                            }
-                        }
-                    }
-
                     let mut events = Events::default();
 
-                    if resized {
-                        let logical_size = LogicalSize::from_physical(new_inner_size, monitor.hidpi_factor);
-                        events.resized = Some(WindowEvent::Resized(logical_size));
-                    }
-
                     let new_outer_position = if moved || shared_state_lock.position.is_none() {
                         // We need to convert client area position to window position.
                         let frame_extents = shared_state_lock.frame_extents
@@ -497,9 +477,9 @@ impl EventsLoop {
                             });
                         let new_hidpi_factor = {
                             let window_rect = util::AaRect::new(new_outer_position, new_inner_size);
-                            let monitor = self.xconn.get_monitor_for_window(Some(window_rect));
+                            monitor = self.xconn.get_monitor_for_window(Some(window_rect));
                             let new_hidpi_factor = monitor.hidpi_factor;
-                            shared_state_lock.last_monitor = Some(monitor);
+                            shared_state_lock.last_monitor = Some(monitor.clone());
                             new_hidpi_factor
                         };
                         if last_hidpi_factor != new_hidpi_factor {
@@ -512,23 +492,50 @@ impl EventsLoop {
                             );
                             flusher.queue();
                             shared_state_lock.dpi_adjusted = Some((new_width, new_height));
+                            // if the DPI factor changed, force a resize event to ensure the logical
+                            // size is computed with the right DPI factor
+                            resized = true;
                         }
                     }
 
+                    // This is a hack to ensure that the DPI adjusted resize is actually applied on all WMs. KWin
+                    // doesn't need this, but Xfwm does.
+                    if let Some(adjusted_size) = shared_state_lock.dpi_adjusted {
+                        let rounded_size = (adjusted_size.0.round() as u32, adjusted_size.1.round() as u32);
+                        if new_inner_size == rounded_size {
+                            // When this finally happens, the event will not be synthetic.
+                            shared_state_lock.dpi_adjusted = None;
+                        } else {
+                            unsafe {
+                                (self.xconn.xlib.XResizeWindow)(
+                                    self.xconn.display,
+                                    xwindow,
+                                    rounded_size.0 as c_uint,
+                                    rounded_size.1 as c_uint,
+                                );
+                            }
+                        }
+                    }
+
+                    if resized {
+                        let logical_size = LogicalSize::from_physical(new_inner_size, monitor.hidpi_factor);
+                        events.resized = Some(WindowEvent::Resized(logical_size));
+                    }
+
                     events
                 });
 
                 if let Some(events) = events {
                     let window_id = mkwid(xwindow);
+                    if let Some(event) = events.dpi_changed {
+                        callback(Event::WindowEvent { window_id, event });
+                    }
                     if let Some(event) = events.resized {
                         callback(Event::WindowEvent { window_id, event });
                     }
                     if let Some(event) = events.moved {
                         callback(Event::WindowEvent { window_id, event });
                     }
-                    if let Some(event) = events.dpi_changed {
-                        callback(Event::WindowEvent { window_id, event });
-                    }
                 }
             }
 

src/platform/linux/x11/util/hint.rs

@@ -22,7 +22,7 @@ impl From<bool> for StateOperation {
 }
 
 /// X window type. Maps directly to
-/// [`_NET_WM_WINDOW_TYPE`](https://specifications.freedesktop.org/wm-spec/1.3/ar01s05.html).
+/// [`_NET_WM_WINDOW_TYPE`](https://specifications.freedesktop.org/wm-spec/wm-spec-1.5.html).
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash)]
 pub enum WindowType {
     /// A desktop feature. This can include a single window containing desktop icons with the same dimensions as the
@@ -41,6 +41,24 @@ pub enum WindowType {
     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.
     Normal,
 }
@@ -62,6 +80,12 @@ impl WindowType {
             &Utility => b"_NET_WM_WINDOW_TYPE_UTILITY\0",
             &Splash => b"_NET_WM_WINDOW_TYPE_SPLASH\0",
             &Dialog => b"_NET_WM_WINDOW_TYPE_DIALOG\0",
+            &DropdownMenu => b"_NET_WM_WINDOW_TYPE_DROPDOWN_MENU\0",
+            &PopupMenu => b"_NET_WM_WINDOW_TYPE_POPUP_MENU\0",
+            &Tooltip => b"_NET_WM_WINDOW_TYPE_TOOLTIP\0",
+            &Notification => b"_NET_WM_WINDOW_TYPE_NOTIFICATION\0",
+            &Combo => b"_NET_WM_WINDOW_TYPE_COMBO\0",
+            &Dnd => b"_NET_WM_WINDOW_TYPE_DND\0",
             &Normal => b"_NET_WM_WINDOW_TYPE_NORMAL\0",
         };
         unsafe { xconn.get_atom_unchecked(atom_name) }

src/platform/linux/x11/window.rs

@@ -272,6 +272,10 @@ impl UnownedWindow {
                 window.set_window_type(pl_attribs.x11_window_type).queue();
             }
 
+            if let Some(variant) = pl_attribs.gtk_theme_variant {
+                window.set_gtk_theme_variant(variant).queue();
+            }
+
             // set size hints
             {
                 let mut min_dimensions = window_attrs.min_dimensions;
@@ -457,6 +461,19 @@ impl UnownedWindow {
         )
     }
 
+    fn set_gtk_theme_variant(&self, variant: String) -> util::Flusher {
+        let hint_atom = unsafe { self.xconn.get_atom_unchecked(b"_GTK_THEME_VARIANT\0") };
+        let utf8_atom = unsafe { self.xconn.get_atom_unchecked(b"UTF8_STRING\0") };
+        let variant = CString::new(variant).expect("`_GTK_THEME_VARIANT` contained null byte");
+        self.xconn.change_property(
+            self.xwindow,
+            hint_atom,
+            utf8_atom,
+            util::PropMode::Replace,
+            variant.as_bytes(),
+        )
+    }
+
     #[inline]
     pub fn set_urgent(&self, is_urgent: bool) {
         let mut wm_hints = self.xconn.get_wm_hints(self.xwindow).expect("`XGetWMHints` failed");
@@ -583,7 +600,7 @@ impl UnownedWindow {
                 wm_name_atom,
                 utf8_atom,
                 util::PropMode::Replace,
-                title.as_bytes_with_nul(),
+                title.as_bytes(),
             )
         }
     }

src/platform/macos/events_loop.rs

@@ -180,7 +180,7 @@ impl EventsLoop {
         where F: FnMut(Event),
     {
         unsafe {
-            if !msg_send![cocoa::base::class("NSThread"), isMainThread] {
+            if !msg_send![class!(NSThread), isMainThread] {
                 panic!("Events can only be polled from the main thread on macOS");
             }
         }
@@ -221,7 +221,7 @@ impl EventsLoop {
         where F: FnMut(Event) -> ControlFlow
     {
         unsafe {
-            if !msg_send![cocoa::base::class("NSThread"), isMainThread] {
+            if !msg_send![class!(NSThread), isMainThread] {
                 panic!("Events can only be polled from the main thread on macOS");
             }
         }
@@ -315,6 +315,27 @@ impl EventsLoop {
             });
 
         match event_type {
+            // https://github.com/glfw/glfw/blob/50eccd298a2bbc272b4977bd162d3e4b55f15394/src/cocoa_window.m#L881
+            appkit::NSKeyUp  => {
+                if let Some(key_window) = maybe_key_window() {
+                    if event_mods(ns_event).logo {
+                        let _: () = msg_send![*key_window.window, sendEvent:ns_event];
+                    }
+                }
+                None
+            },
+            // similar to above, but for `<Cmd-.>`, the keyDown is suppressed instead of the
+            // KeyUp, and the above trick does not appear to work.
+            appkit::NSKeyDown => {
+                let modifiers = event_mods(ns_event);
+                let keycode = NSEvent::keyCode(ns_event);
+                if modifiers.logo && keycode == 47 {
+                    modifier_event(ns_event, NSEventModifierFlags::NSCommandKeyMask, false)
+                        .map(into_event)
+                } else {
+                    None
+                }
+            },
             appkit::NSFlagsChanged => {
                 let mut events = std::collections::VecDeque::new();
 
@@ -589,7 +610,7 @@ pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
         0x3d => events::VirtualKeyCode::RAlt,
         0x3e => events::VirtualKeyCode::RControl,
         //0x3f => Fn key,
-        //0x40 => F17 Key,
+        0x40 => events::VirtualKeyCode::F17,
         0x41 => events::VirtualKeyCode::Decimal,
         //0x42 -> unkown,
         0x43 => events::VirtualKeyCode::Multiply,
@@ -604,8 +625,8 @@ pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
         0x4c => events::VirtualKeyCode::NumpadEnter,
         //0x4d => unkown,
         0x4e => events::VirtualKeyCode::Subtract,
-        //0x4f => F18 key,
-        //0x50 => F19 Key,
+        0x4f => events::VirtualKeyCode::F18,
+        0x50 => events::VirtualKeyCode::F19,
         0x51 => events::VirtualKeyCode::NumpadEquals,
         0x52 => events::VirtualKeyCode::Numpad0,
         0x53 => events::VirtualKeyCode::Numpad1,
@@ -615,7 +636,7 @@ pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
         0x57 => events::VirtualKeyCode::Numpad5,
         0x58 => events::VirtualKeyCode::Numpad6,
         0x59 => events::VirtualKeyCode::Numpad7,
-        //0x5a => F20 Key,
+        0x5a => events::VirtualKeyCode::F20,
         0x5b => events::VirtualKeyCode::Numpad8,
         0x5c => events::VirtualKeyCode::Numpad9,
         //0x5d => unkown,
@@ -631,7 +652,7 @@ pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
         0x67 => events::VirtualKeyCode::F11,
         //0x68 => unkown,
         0x69 => events::VirtualKeyCode::F13,
-        //0x6a => F16 Key,
+        0x6a => events::VirtualKeyCode::F16,
         0x6b => events::VirtualKeyCode::F14,
         //0x6c => unkown,
         0x6d => events::VirtualKeyCode::F10,
@@ -659,6 +680,23 @@ pub fn to_virtual_key_code(code: c_ushort) -> Option<events::VirtualKeyCode> {
     })
 }
 
+pub fn check_additional_virtual_key_codes(
+    s: &Option<String>
+) -> Option<events::VirtualKeyCode> {
+    if let &Some(ref s) = s {
+        if let Some(ch) = s.encode_utf16().next() {
+            return Some(match ch {
+                0xf718 => events::VirtualKeyCode::F21,
+                0xf719 => events::VirtualKeyCode::F22,
+                0xf71a => events::VirtualKeyCode::F23,
+                0xf71b => events::VirtualKeyCode::F24,
+                _ => return None,
+            })
+        }
+    }
+    None
+}
+
 pub fn event_mods(event: cocoa::base::id) -> ModifiersState {
     let flags = unsafe {
         NSEvent::modifierFlags(event)
@@ -674,11 +712,15 @@ pub fn event_mods(event: cocoa::base::id) -> ModifiersState {
 unsafe fn modifier_event(
     ns_event: cocoa::base::id,
     keymask: NSEventModifierFlags,
-    key_pressed: bool,
+    was_key_pressed: bool,
 ) -> Option<WindowEvent> {
-    if !key_pressed && NSEvent::modifierFlags(ns_event).contains(keymask)
-    || key_pressed && !NSEvent::modifierFlags(ns_event).contains(keymask) {
-        let state = ElementState::Released;
+    if !was_key_pressed && NSEvent::modifierFlags(ns_event).contains(keymask)
+    || was_key_pressed && !NSEvent::modifierFlags(ns_event).contains(keymask) {
+        let state = if was_key_pressed {
+            ElementState::Released
+        } else {
+            ElementState::Pressed
+        };
         let keycode = NSEvent::keyCode(ns_event);
         let scancode = keycode as u32;
         let virtual_keycode = to_virtual_key_code(keycode);

src/platform/macos/ffi.rs

@@ -2,7 +2,7 @@
 
 #![allow(dead_code, non_snake_case, non_upper_case_globals)]
 
-use cocoa::base::{class, id};
+use cocoa::base::id;
 use cocoa::foundation::{NSInteger, NSUInteger};
 use objc;
 
@@ -35,7 +35,7 @@ unsafe impl objc::Encode for NSRange {
 
 pub trait NSMutableAttributedString: Sized {
     unsafe fn alloc(_: Self) -> id {
-        msg_send![class("NSMutableAttributedString"), alloc]
+        msg_send![class!(NSMutableAttributedString), alloc]
     }
 
     unsafe fn init(self) -> id; // *mut NSMutableAttributedString

src/platform/macos/util.rs

@@ -1,5 +1,5 @@
 use cocoa::appkit::NSWindowStyleMask;
-use cocoa::base::{class, id, nil};
+use cocoa::base::{id, nil};
 use cocoa::foundation::{NSRect, NSUInteger};
 use core_graphics::display::CGDisplay;
 
@@ -26,13 +26,13 @@ pub unsafe fn set_style_mask(window: id, view: id, mask: NSWindowStyleMask) {
 }
 
 pub unsafe fn create_input_context(view: id) -> IdRef {
-    let input_context: id = msg_send![class("NSTextInputContext"), alloc];
+    let input_context: id = msg_send![class!(NSTextInputContext), alloc];
     let input_context: id = msg_send![input_context, initWithClient:view];
     IdRef::new(input_context)
 }
 
 #[allow(dead_code)]
 pub unsafe fn open_emoji_picker() {
-    let app: id = msg_send![class("NSApplication"), sharedApplication];
+    let app: id = msg_send![class!(NSApplication), sharedApplication];
     let _: () = msg_send![app, orderFrontCharacterPalette:nil];
 }

src/platform/macos/view.rs

@@ -7,14 +7,14 @@ use std::collections::VecDeque;
 use std::os::raw::*;
 use std::sync::Weak;
 
-use cocoa::base::{class, id, nil};
+use cocoa::base::{id, nil};
 use cocoa::appkit::{NSEvent, NSView, NSWindow};
 use cocoa::foundation::{NSPoint, NSRect, NSSize, NSString, NSUInteger};
 use objc::declare::ClassDecl;
-use objc::runtime::{Class, Object, Protocol, Sel, BOOL};
+use objc::runtime::{Class, Object, Protocol, Sel, BOOL, YES};
 
 use {ElementState, Event, KeyboardInput, MouseButton, WindowEvent, WindowId};
-use platform::platform::events_loop::{DEVICE_ID, event_mods, Shared, to_virtual_key_code};
+use platform::platform::events_loop::{DEVICE_ID, event_mods, Shared, to_virtual_key_code, check_additional_virtual_key_codes};
 use platform::platform::util;
 use platform::platform::ffi::*;
 use platform::platform::window::{get_window_id, IdRef};
@@ -24,7 +24,7 @@ struct ViewState {
     shared: Weak<Shared>,
     ime_spot: Option<(f64, f64)>,
     raw_characters: Option<String>,
-    last_insert: Option<String>,
+    is_key_down: bool,
 }
 
 pub fn new_view(window: id, shared: Weak<Shared>) -> IdRef {
@@ -33,7 +33,7 @@ pub fn new_view(window: id, shared: Weak<Shared>) -> IdRef {
         shared,
         ime_spot: None,
         raw_characters: None,
-        last_insert: None,
+        is_key_down: false,
     };
     unsafe {
         // This is free'd in `dealloc`
@@ -64,7 +64,7 @@ unsafe impl Sync for ViewClass {}
 
 lazy_static! {
     static ref VIEW_CLASS: ViewClass = unsafe {
-        let superclass = Class::get("NSView").unwrap();
+        let superclass = class!(NSView);
         let mut decl = ClassDecl::new("WinitView", superclass).unwrap();
         decl.add_method(sel!(dealloc), dealloc as extern fn(&Object, Sel));
         decl.add_method(
@@ -122,6 +122,7 @@ lazy_static! {
         decl.add_method(sel!(mouseDragged:), mouse_dragged as extern fn(&Object, Sel, id));
         decl.add_method(sel!(rightMouseDragged:), right_mouse_dragged as extern fn(&Object, Sel, id));
         decl.add_method(sel!(otherMouseDragged:), other_mouse_dragged as extern fn(&Object, Sel, id));
+        decl.add_method(sel!(_wantsKeyDownForEvent:), wants_key_down_for_event as extern fn(&Object, Sel, id) -> BOOL);
         decl.add_ivar::<*mut c_void>("winitState");
         decl.add_ivar::<id>("markedText");
         let protocol = Protocol::get("NSTextInputClient").unwrap();
@@ -191,7 +192,7 @@ extern fn set_marked_text(
         let marked_text_ref: &mut id = this.get_mut_ivar("markedText");
         let _: () = msg_send![(*marked_text_ref), release];
         let marked_text = NSMutableAttributedString::alloc(nil);
-        let has_attr = msg_send![string, isKindOfClass:class("NSAttributedString")];
+        let has_attr = msg_send![string, isKindOfClass:class!(NSAttributedString)];
         if has_attr {
             marked_text.initWithAttributedString(string);
         } else {
@@ -214,7 +215,7 @@ extern fn unmark_text(this: &Object, _sel: Sel) {
 
 extern fn valid_attributes_for_marked_text(_this: &Object, _sel: Sel) -> id {
     //println!("validAttributesForMarkedText");
-    unsafe { msg_send![class("NSArray"), array] }
+    unsafe { msg_send![class!(NSArray), array] }
 }
 
 extern fn attributed_substring_for_proposed_range(
@@ -265,7 +266,7 @@ extern fn insert_text(this: &Object, _sel: Sel, string: id, _replacement_range:
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
         let state = &mut *(state_ptr as *mut ViewState);
 
-        let has_attr = msg_send![string, isKindOfClass:class("NSAttributedString")];
+        let has_attr = msg_send![string, isKindOfClass:class!(NSAttributedString)];
         let characters = if has_attr {
             // This is a *mut NSAttributedString
             msg_send![string, string]
@@ -279,10 +280,10 @@ extern fn insert_text(this: &Object, _sel: Sel, string: id, _replacement_range:
             characters.len(),
         );
         let string = str::from_utf8_unchecked(slice);
-        state.last_insert = Some(string.to_owned());
+        state.is_key_down = true;
 
         // We don't need this now, but it's here if that changes.
-        //let event: id = msg_send![class("NSApp"), currentEvent];
+        //let event: id = msg_send![class!(NSApp), currentEvent];
 
         let mut events = VecDeque::with_capacity(characters.len());
         for character in string.chars() {
@@ -343,6 +344,18 @@ extern fn do_command_by_selector(this: &Object, _sel: Sel, command: Sel) {
     }
 }
 
+fn get_characters(event: id) -> Option<String> {
+    unsafe {
+        let characters: id = msg_send![event, characters];
+        let slice = slice::from_raw_parts(
+            characters.UTF8String() as *const c_uchar,
+            characters.len(),
+        );
+        let string = str::from_utf8_unchecked(slice);
+        Some(string.to_owned())
+    }
+}
+
 extern fn key_down(this: &Object, _sel: Sel, event: id) {
     //println!("keyDown");
     unsafe {
@@ -350,8 +363,16 @@ extern fn key_down(this: &Object, _sel: Sel, event: id) {
         let state = &mut *(state_ptr as *mut ViewState);
         let window_id = WindowId(get_window_id(state.window));
 
+        state.raw_characters = get_characters(event);
+
         let keycode: c_ushort = msg_send![event, keyCode];
-        let virtual_keycode = to_virtual_key_code(keycode);
+        // We are checking here for F21-F24 keys, since their keycode
+        // can vary, but we know that they are encoded
+        // in characters property.
+        let virtual_keycode = to_virtual_key_code(keycode)
+            .or_else(|| {
+                check_additional_virtual_key_codes(&state.raw_characters)
+            });
         let scancode = keycode as u32;
         let is_repeat = msg_send![event, isARepeat];
 
@@ -368,13 +389,14 @@ extern fn key_down(this: &Object, _sel: Sel, event: id) {
             },
         };
 
-        state.raw_characters = {
-            let characters: id = msg_send![event, characters];
-            let slice = slice::from_raw_parts(
-                characters.UTF8String() as *const c_uchar,
-                characters.len(),
+        let characters: id = msg_send![event, characters];
+        let slice = slice::from_raw_parts(
+            characters.UTF8String() as *const c_uchar,
+            characters.len(),
             );
-            let string = str::from_utf8_unchecked(slice);
+        let string = str::from_utf8_unchecked(slice);
+
+        state.raw_characters = {
             Some(string.to_owned())
         };
 
@@ -384,9 +406,8 @@ extern fn key_down(this: &Object, _sel: Sel, event: id) {
                 .unwrap()
                 .push_back(window_event);
             // Emit `ReceivedCharacter` for key repeats
-            if is_repeat && state.last_insert.is_some() {
-                let last_insert = state.last_insert.as_ref().unwrap();
-                for character in last_insert.chars() {
+            if is_repeat && state.is_key_down{
+                for character in string.chars() {
                     let window_event = Event::WindowEvent {
                         window_id,
                         event: WindowEvent::ReceivedCharacter(character),
@@ -400,7 +421,7 @@ extern fn key_down(this: &Object, _sel: Sel, event: id) {
                 // Some keys (and only *some*, with no known reason) don't trigger `insertText`, while others do...
                 // So, we don't give repeats the opportunity to trigger that, since otherwise our hack will cause some
                 // keys to generate twice as many characters.
-                let array: id = msg_send![class("NSArray"), arrayWithObject:event];
+                let array: id = msg_send![class!(NSArray), arrayWithObject:event];
                 let (): _ = msg_send![this, interpretKeyEvents:array];
             }
         }
@@ -413,10 +434,17 @@ extern fn key_up(this: &Object, _sel: Sel, event: id) {
         let state_ptr: *mut c_void = *this.get_ivar("winitState");
         let state = &mut *(state_ptr as *mut ViewState);
 
-        state.last_insert = None;
+        state.is_key_down = false;
+
+        // We need characters here to check for additional keys such as
+        // F21-F24.
+        let characters = get_characters(event);
 
         let keycode: c_ushort = msg_send![event, keyCode];
-        let virtual_keycode = to_virtual_key_code(keycode);
+        let virtual_keycode = to_virtual_key_code(keycode)
+            .or_else(|| {
+                check_additional_virtual_key_codes(&characters)
+            });
         let scancode = keycode as u32;
         let window_event = Event::WindowEvent {
             window_id: WindowId(get_window_id(state.window)),
@@ -566,3 +594,8 @@ extern fn right_mouse_dragged(this: &Object, _sel: Sel, event: id) {
 extern fn other_mouse_dragged(this: &Object, _sel: Sel, event: id) {
     mouse_motion(this, event);
 }
+
+// https://github.com/chromium/chromium/blob/a86a8a6bcfa438fa3ac2eba6f02b3ad1f8e0756f/ui/views/cocoa/bridged_content_view.mm#L816
+extern fn wants_key_down_for_event(_this: &Object, _se: Sel, _event: id) -> BOOL {
+    YES
+}

src/platform/macos/window.rs

@@ -1,20 +1,24 @@
 use std;
+use std::cell::{Cell, RefCell};
+use std::f64;
 use std::ops::Deref;
 use std::os::raw::c_void;
 use std::sync::Weak;
-use std::cell::{Cell, RefCell};
+use std::sync::atomic::{Ordering, AtomicBool};
 
-use cocoa;
 use cocoa::appkit::{
     self,
     CGFloat,
+    NSApp,
     NSApplication,
     NSColor,
+    NSRequestUserAttentionType,
     NSScreen,
     NSView,
     NSWindow,
     NSWindowButton,
     NSWindowStyleMask,
+    NSApplicationActivationPolicy,
 };
 use cocoa::base::{id, nil};
 use cocoa::foundation::{NSAutoreleasePool, NSDictionary, NSPoint, NSRect, NSSize, NSString};
@@ -45,6 +49,7 @@ use window::MonitorId as RootMonitorId;
 #[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct Id(pub usize);
 
+// TODO: It's possible for delegate methods to be called asynchronously, causing data races / `RefCell` panics.
 pub struct DelegateState {
     view: IdRef,
     window: IdRef,
@@ -421,7 +426,7 @@ impl WindowDelegate {
 
         INIT.call_once(|| unsafe {
             // Create new NSWindowDelegate
-            let superclass = Class::get("NSObject").unwrap();
+            let superclass = class!(NSObject);
             let mut decl = ClassDecl::new("WinitWindowDelegate", superclass).unwrap();
 
             // Add callback methods
@@ -526,7 +531,7 @@ pub struct Window2 {
     pub window: IdRef,
     pub delegate: WindowDelegate,
     pub input_context: IdRef,
-    cursor_hidden: Cell<bool>,
+    cursor_hidden: AtomicBool,
 }
 
 unsafe impl Send for Window2 {}
@@ -582,6 +587,19 @@ impl WindowExt for Window2 {
     fn get_nsview(&self) -> *mut c_void {
         *self.view as *mut c_void
     }
+
+    #[inline]
+    fn request_user_attention(&self, is_critical: bool) {
+        let request_type = if is_critical {
+            NSRequestUserAttentionType::NSCriticalRequest
+        } else {
+            NSRequestUserAttentionType::NSInformationalRequest
+        };
+
+        unsafe {
+            NSApp().requestUserAttention_(request_type);
+        }
+    }
 }
 
 impl Window2 {
@@ -591,7 +609,7 @@ impl Window2 {
         pl_attribs: PlatformSpecificWindowBuilderAttributes,
     ) -> Result<Window2, CreationError> {
         unsafe {
-            if !msg_send![cocoa::base::class("NSThread"), isMainThread] {
+            if !msg_send![class!(NSThread), isMainThread] {
                 panic!("Windows can only be created on the main thread on macOS");
             }
         }
@@ -716,7 +734,15 @@ impl Window2 {
             if app == nil {
                 None
             } else {
-                app.setActivationPolicy_(activation_policy.into());
+                let ns_activation_policy = match activation_policy {
+                    ActivationPolicy::Regular =>
+                        NSApplicationActivationPolicy::NSApplicationActivationPolicyRegular,
+                    ActivationPolicy::Accessory =>
+                        NSApplicationActivationPolicy::NSApplicationActivationPolicyAccessory,
+                    ActivationPolicy::Prohibited =>
+                        NSApplicationActivationPolicy::NSApplicationActivationPolicyProhibited,
+                };
+                app.setActivationPolicy_(ns_activation_policy);
                 app.finishLaunching();
                 Some(app)
             }
@@ -728,7 +754,7 @@ impl Window2 {
         static INIT: std::sync::Once = std::sync::ONCE_INIT;
 
         INIT.call_once(|| unsafe {
-            let window_superclass = Class::get("NSWindow").unwrap();
+            let window_superclass = class!(NSWindow);
             let mut decl = ClassDecl::new("WinitWindow", window_superclass).unwrap();
             decl.add_method(sel!(canBecomeMainWindow), yes as extern fn(&Object, Sel) -> BOOL);
             decl.add_method(sel!(canBecomeKeyWindow), yes as extern fn(&Object, Sel) -> BOOL);
@@ -849,6 +875,16 @@ impl Window2 {
             let view = new_view(window, shared);
             view.non_nil().map(|view| {
                 view.setWantsBestResolutionOpenGLSurface_(YES);
+
+                // On Mojave, views automatically become layer-backed shortly after being added to
+                // a window. Changing the layer-backedness of a view breaks the association between
+                // the view and its associated OpenGL context. To work around this, on Mojave we
+                // explicitly make the view layer-backed up front so that AppKit doesn't do it
+                // itself and break the association with its context.
+                if f64::floor(appkit::NSAppKitVersionNumber) > appkit::NSAppKitVersionNumber10_12 {
+                    view.setWantsLayer(YES);
+                }
+
                 window.setContentView_(*view);
                 window.makeFirstResponder_(*view);
                 view
@@ -987,7 +1023,7 @@ impl Window2 {
             MouseCursor::ZoomOut => "arrowCursor",
         };
         let sel = Sel::register(cursor_name);
-        let cls = Class::get("NSCursor").unwrap();
+        let cls = class!(NSCursor);
         unsafe {
             use objc::Message;
             let cursor: id = cls.send_message(sel, ()).unwrap();
@@ -1004,16 +1040,16 @@ impl Window2 {
 
     #[inline]
     pub fn hide_cursor(&self, hide: bool) {
-        let cursor_class = Class::get("NSCursor").unwrap();
+        let cursor_class = class!(NSCursor);
         // macOS uses a "hide counter" like Windows does, so we avoid incrementing it more than once.
         // (otherwise, `hide_cursor(false)` would need to be called n times!)
-        if hide != self.cursor_hidden.get() {
+        if hide != self.cursor_hidden.load(Ordering::Acquire) {
             if hide {
                 let _: () = unsafe { msg_send![cursor_class, hide] };
             } else {
                 let _: () = unsafe { msg_send![cursor_class, unhide] };
             }
-            self.cursor_hidden.replace(hide);
+            self.cursor_hidden.store(hide, Ordering::Release);
         }
     }
 

src/platform/mod.rs

@@ -3,7 +3,7 @@ pub use self::platform::*;
 #[cfg(target_os = "windows")]
 #[path="windows/mod.rs"]
 mod platform;
-#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd"))]
+#[cfg(any(target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "netbsd", target_os = "openbsd"))]
 #[path="linux/mod.rs"]
 mod platform;
 #[cfg(target_os = "macos")]
@@ -21,5 +21,6 @@ mod platform;
 
 #[cfg(all(not(target_os = "ios"), not(target_os = "windows"), not(target_os = "linux"),
   not(target_os = "macos"), not(target_os = "android"), not(target_os = "dragonfly"),
-  not(target_os = "freebsd"), not(target_os = "openbsd"), not(target_os = "emscripten")))]
+  not(target_os = "freebsd"), not(target_os = "netbsd"), not(target_os = "openbsd"),
+  not(target_os = "emscripten")))]
 compile_error!("The platform you're compiling for is not supported by winit");

src/platform/windows/dpi.rs

@@ -8,7 +8,6 @@ use winapi::shared::minwindef::{BOOL, UINT, FALSE};
 use winapi::shared::windef::{
     DPI_AWARENESS_CONTEXT,
     DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE,
-    HDC,
     HMONITOR,
     HWND,
 };
@@ -145,7 +144,11 @@ pub fn dpi_to_scale_factor(dpi: u32) -> f64 {
     dpi as f64 / BASE_DPI as f64
 }
 
-pub unsafe fn get_window_dpi(hwnd: HWND, hdc: HDC) -> u32 {
+pub unsafe fn get_hwnd_dpi(hwnd: HWND) -> u32 {
+    let hdc = winuser::GetDC(hwnd);
+    if hdc.is_null() {
+        panic!("[winit] `GetDC` returned null!");
+    }
     if let Some(GetDpiForWindow) = *GET_DPI_FOR_WINDOW {
         // We are on Windows 10 Anniversary Update (1607) or later.
         match GetDpiForWindow(hwnd) {
@@ -181,16 +184,6 @@ pub unsafe fn get_window_dpi(hwnd: HWND, hdc: HDC) -> u32 {
     }
 }
 
-// Use this when you have both the HWND and HDC on hand (i.e. window methods)
-pub fn get_window_scale_factor(hwnd: HWND, hdc: HDC) -> f64 {
-    dpi_to_scale_factor(unsafe { get_window_dpi(hwnd, hdc) })
-}
-
-// Use this when you only have the HWND (i.e. event handling)
 pub fn get_hwnd_scale_factor(hwnd: HWND) -> f64 {
-    let hdc = unsafe { winuser::GetDC(hwnd) };
-    if hdc.is_null() {
-        panic!("[winit] `GetDC` returned null!");
-    }
-    unsafe { get_window_scale_factor(hwnd, hdc) }
+    dpi_to_scale_factor(unsafe { get_hwnd_dpi(hwnd) })
 }

src/platform/windows/drop_handler.rs

@@ -0,0 +1,203 @@
+use std::ffi::OsString;
+use std::os::windows::ffi::OsStringExt;
+use std::path::PathBuf;
+use std::sync::atomic::{AtomicUsize, Ordering};
+use std::{mem, ptr};
+
+use winapi::ctypes::c_void;
+use winapi::shared::guiddef::REFIID;
+use winapi::shared::minwindef::{DWORD, MAX_PATH, UINT, ULONG};
+use winapi::shared::windef::{HWND, POINTL};
+use winapi::shared::winerror::S_OK;
+use winapi::um::objidl::IDataObject;
+use winapi::um::oleidl::{IDropTarget, IDropTargetVtbl};
+use winapi::um::winnt::HRESULT;
+use winapi::um::{shellapi, unknwnbase};
+
+use platform::platform::events_loop::send_event;
+use platform::platform::WindowId;
+
+use {Event, WindowId as SuperWindowId};
+
+#[repr(C)]
+pub struct FileDropHandlerData {
+    pub interface: IDropTarget,
+    refcount: AtomicUsize,
+    window: HWND,
+}
+
+pub struct FileDropHandler {
+    pub data: *mut FileDropHandlerData,
+}
+
+#[allow(non_snake_case)]
+impl FileDropHandler {
+    pub fn new(window: HWND) -> FileDropHandler {
+        let data = Box::new(FileDropHandlerData {
+            interface: IDropTarget {
+                lpVtbl: &DROP_TARGET_VTBL as *const IDropTargetVtbl,
+            },
+            refcount: AtomicUsize::new(1),
+            window,
+        });
+        FileDropHandler {
+            data: Box::into_raw(data),
+        }
+    }
+
+    // Implement IUnknown
+    pub unsafe extern "system" fn QueryInterface(
+        _this: *mut unknwnbase::IUnknown,
+        _riid: REFIID,
+        _ppvObject: *mut *mut c_void,
+    ) -> HRESULT {
+        // This function doesn't appear to be required for an `IDropTarget`.
+        // An implementation would be nice however.
+        unimplemented!();
+    }
+
+    pub unsafe extern "system" fn AddRef(this: *mut unknwnbase::IUnknown) -> ULONG {
+        let drop_handler_data = Self::from_interface(this);
+        let count = drop_handler_data.refcount.fetch_add(1, Ordering::Release) + 1;
+        count as ULONG
+    }
+
+    pub unsafe extern "system" fn Release(this: *mut unknwnbase::IUnknown) -> ULONG {
+        let drop_handler = Self::from_interface(this);
+        let count = drop_handler.refcount.fetch_sub(1, Ordering::Release) - 1;
+        if count == 0 {
+            // Destroy the underlying data
+            Box::from_raw(drop_handler as *mut FileDropHandlerData);
+        }
+        count as ULONG
+    }
+
+    pub unsafe extern "system" fn DragEnter(
+        this: *mut IDropTarget,
+        pDataObj: *const IDataObject,
+        _grfKeyState: DWORD,
+        _pt: *const POINTL,
+        _pdwEffect: *mut DWORD,
+    ) -> HRESULT {
+        use events::WindowEvent::HoveredFile;
+        let drop_handler = Self::from_interface(this);
+        Self::iterate_filenames(pDataObj, |filename| {
+            send_event(Event::WindowEvent {
+                window_id: SuperWindowId(WindowId(drop_handler.window)),
+                event: HoveredFile(filename),
+            });
+        });
+
+        S_OK
+    }
+
+    pub unsafe extern "system" fn DragOver(
+        _this: *mut IDropTarget,
+        _grfKeyState: DWORD,
+        _pt: *const POINTL,
+        _pdwEffect: *mut DWORD,
+    ) -> HRESULT {
+        S_OK
+    }
+
+    pub unsafe extern "system" fn DragLeave(this: *mut IDropTarget) -> HRESULT {
+        use events::WindowEvent::HoveredFileCancelled;
+        let drop_handler = Self::from_interface(this);
+        send_event(Event::WindowEvent {
+            window_id: SuperWindowId(WindowId(drop_handler.window)),
+            event: HoveredFileCancelled,
+        });
+
+        S_OK
+    }
+
+    pub unsafe extern "system" fn Drop(
+        this: *mut IDropTarget,
+        pDataObj: *const IDataObject,
+        _grfKeyState: DWORD,
+        _pt: *const POINTL,
+        _pdwEffect: *mut DWORD,
+    ) -> HRESULT {
+        use events::WindowEvent::DroppedFile;
+        let drop_handler = Self::from_interface(this);
+        let hdrop = Self::iterate_filenames(pDataObj, |filename| {
+            send_event(Event::WindowEvent {
+                window_id: SuperWindowId(WindowId(drop_handler.window)),
+                event: DroppedFile(filename),
+            });
+        });
+        shellapi::DragFinish(hdrop);
+
+        S_OK
+    }
+
+    unsafe fn from_interface<'a, InterfaceT>(this: *mut InterfaceT) -> &'a mut FileDropHandlerData {
+        &mut *(this as *mut _)
+    }
+
+    unsafe fn iterate_filenames<F>(data_obj: *const IDataObject, callback: F) -> shellapi::HDROP
+    where
+        F: Fn(PathBuf),
+    {
+        use winapi::ctypes::wchar_t;
+        use winapi::shared::winerror::SUCCEEDED;
+        use winapi::shared::wtypes::{CLIPFORMAT, DVASPECT_CONTENT};
+        use winapi::um::objidl::{FORMATETC, TYMED_HGLOBAL};
+        use winapi::um::shellapi::DragQueryFileW;
+        use winapi::um::winuser::CF_HDROP;
+
+        let mut drop_format = FORMATETC {
+            cfFormat: CF_HDROP as CLIPFORMAT,
+            ptd: ptr::null(),
+            dwAspect: DVASPECT_CONTENT,
+            lindex: -1,
+            tymed: TYMED_HGLOBAL,
+        };
+
+        let mut medium = mem::uninitialized();
+        if SUCCEEDED((*data_obj).GetData(&mut drop_format, &mut medium)) {
+            let hglobal = (*medium.u).hGlobal();
+            let hdrop = (*hglobal) as shellapi::HDROP;
+
+            // The second parameter (0xFFFFFFFF) instructs the function to return the item count
+            let item_count = DragQueryFileW(hdrop, 0xFFFFFFFF, ptr::null_mut(), 0);
+
+            let mut pathbuf: [wchar_t; MAX_PATH] = mem::uninitialized();
+
+            for i in 0..item_count {
+                let character_count =
+                    DragQueryFileW(hdrop, i, pathbuf.as_mut_ptr(), MAX_PATH as UINT) as usize;
+
+                if character_count > 0 {
+                    callback(OsString::from_wide(&pathbuf[0..character_count]).into());
+                }
+            }
+
+            return hdrop;
+        }
+
+        // The call to `GetData` must succeed and the file handle must be returned before this
+        // point
+        unreachable!();
+    }
+}
+
+impl Drop for FileDropHandler {
+    fn drop(&mut self) {
+        unsafe {
+            FileDropHandler::Release(self.data as *mut unknwnbase::IUnknown);
+        }
+    }
+}
+
+static DROP_TARGET_VTBL: IDropTargetVtbl = IDropTargetVtbl {
+    parent: unknwnbase::IUnknownVtbl {
+        QueryInterface: FileDropHandler::QueryInterface,
+        AddRef: FileDropHandler::AddRef,
+        Release: FileDropHandler::Release,
+    },
+    DragEnter: FileDropHandler::DragEnter,
+    DragOver: FileDropHandler::DragOver,
+    DragLeave: FileDropHandler::DragLeave,
+    Drop: FileDropHandler::Drop,
+};

src/platform/windows/event.rs

@@ -148,7 +148,7 @@ pub fn vkey_to_winit_vkey(vkey: c_int) -> Option<VirtualKeyCode> {
         winuser::VK_F13 => Some(VirtualKeyCode::F13),
         winuser::VK_F14 => Some(VirtualKeyCode::F14),
         winuser::VK_F15 => Some(VirtualKeyCode::F15),
-        /*winuser::VK_F16 => Some(VirtualKeyCode::F16),
+        winuser::VK_F16 => Some(VirtualKeyCode::F16),
         winuser::VK_F17 => Some(VirtualKeyCode::F17),
         winuser::VK_F18 => Some(VirtualKeyCode::F18),
         winuser::VK_F19 => Some(VirtualKeyCode::F19),
@@ -156,7 +156,7 @@ pub fn vkey_to_winit_vkey(vkey: c_int) -> Option<VirtualKeyCode> {
         winuser::VK_F21 => Some(VirtualKeyCode::F21),
         winuser::VK_F22 => Some(VirtualKeyCode::F22),
         winuser::VK_F23 => Some(VirtualKeyCode::F23),
-        winuser::VK_F24 => Some(VirtualKeyCode::F24),*/
+        winuser::VK_F24 => Some(VirtualKeyCode::F24),
         winuser::VK_NUMLOCK => Some(VirtualKeyCode::Numlock),
         winuser::VK_SCROLL => Some(VirtualKeyCode::Scroll),
         winuser::VK_BROWSER_BACK => Some(VirtualKeyCode::NavigateBackward),

src/platform/windows/events_loop.rs

@@ -15,10 +15,8 @@
 use std::{mem, ptr, thread};
 use std::cell::RefCell;
 use std::collections::HashMap;
-use std::ffi::OsString;
-use std::os::windows::ffi::OsStringExt;
 use std::os::windows::io::AsRawHandle;
-use std::sync::{Arc, Barrier, Condvar, mpsc, Mutex};
+use std::sync::{Arc, Barrier, mpsc, Mutex};
 
 use winapi::ctypes::c_int;
 use winapi::shared::minwindef::{
@@ -29,13 +27,14 @@ use winapi::shared::minwindef::{
     LOWORD,
     LPARAM,
     LRESULT,
-    MAX_PATH,
     UINT,
     WPARAM,
 };
 use winapi::shared::windef::{HWND, POINT, RECT};
 use winapi::shared::windowsx;
-use winapi::um::{winuser, shellapi, processthreadsapi};
+use winapi::shared::winerror::S_OK;
+use winapi::um::{winuser, processthreadsapi, ole2};
+use winapi::um::oleidl::LPDROPTARGET;
 use winapi::um::winnt::{LONG, LPCSTR, SHORT};
 
 use {
@@ -57,7 +56,9 @@ use platform::platform::dpi::{
     enable_non_client_dpi_scaling,
     get_hwnd_scale_factor,
 };
+use platform::platform::drop_handler::FileDropHandler;
 use platform::platform::event::{handle_extended_keys, process_key_params, vkey_to_winit_vkey};
+use platform::platform::icon::WinIcon;
 use platform::platform::raw_input::{get_raw_input_data, get_raw_mouse_button_state};
 use platform::platform::window::adjust_size;
 
@@ -94,6 +95,13 @@ pub struct WindowState {
     // This is different from the value in `SavedWindowInfo`! That one represents the DPI saved upon entering
     // fullscreen. This will always be the most recent DPI for the window.
     pub dpi_factor: f64,
+    pub fullscreen: Option<::MonitorId>,
+    pub window_icon: Option<WinIcon>,
+    pub taskbar_icon: Option<WinIcon>,
+    pub decorations: bool,
+    pub always_on_top: bool,
+    pub maximized: bool,
+    pub resizable: bool,
 }
 
 impl WindowState {
@@ -130,10 +138,6 @@ pub struct EventsLoop {
     thread_id: DWORD,
     // Receiver for the events. The sender is in the background thread.
     receiver: mpsc::Receiver<Event>,
-    // Variable that contains the block state of the win32 event loop thread during a WM_SIZE event.
-    // The mutex's value is `true` when it's blocked, and should be set to false when it's done
-    // blocking. That's done by the parent thread when it receives a Resized event.
-    win32_block_loop: Arc<(Mutex<bool>, Condvar)>,
 }
 
 impl EventsLoop {
@@ -146,8 +150,6 @@ impl EventsLoop {
 
         // The main events transfer channel.
         let (tx, rx) = mpsc::channel();
-        let win32_block_loop = Arc::new((Mutex::new(false), Condvar::new()));
-        let win32_block_loop_child = win32_block_loop.clone();
 
         // Local barrier in order to block the `new()` function until the background thread has
         // an events queue.
@@ -159,8 +161,8 @@ impl EventsLoop {
                 *context_stash.borrow_mut() = Some(ThreadLocalData {
                     sender: tx,
                     windows: HashMap::with_capacity(4),
-                    win32_block_loop: win32_block_loop_child,
-                    mouse_buttons_down: 0
+                    file_drop_handlers: HashMap::with_capacity(4),
+                    mouse_buttons_down: 0,
                 });
             });
 
@@ -212,7 +214,6 @@ impl EventsLoop {
         EventsLoop {
             thread_id,
             receiver: rx,
-            win32_block_loop,
         }
     }
 
@@ -224,18 +225,8 @@ impl EventsLoop {
                 Ok(e) => e,
                 Err(_) => return
             };
-            let is_resize = match event {
-                Event::WindowEvent{ event: WindowEvent::Resized(..), .. } => true,
-                _ => false
-            };
 
             callback(event);
-            if is_resize {
-                let (ref mutex, ref cvar) = *self.win32_block_loop;
-                let mut block_thread = mutex.lock().unwrap();
-                *block_thread = false;
-                cvar.notify_all();
-            }
         }
     }
 
@@ -247,18 +238,8 @@ impl EventsLoop {
                 Ok(e) => e,
                 Err(_) => return
             };
-            let is_resize = match event {
-                Event::WindowEvent{ event: WindowEvent::Resized(..), .. } => true,
-                _ => false
-            };
 
             let flow = callback(event);
-            if is_resize {
-                let (ref mutex, ref cvar) = *self.win32_block_loop;
-                let mut block_thread = mutex.lock().unwrap();
-                *block_thread = false;
-                cvar.notify_all();
-            }
             match flow {
                 ControlFlow::Continue => continue,
                 ControlFlow::Break => break,
@@ -326,6 +307,11 @@ impl EventsLoopProxy {
     ///
     /// The `Inserted` can be used to inject a `WindowState` for the callback to use. The state is
     /// removed automatically if the callback receives a `WM_CLOSE` message for the window.
+    ///
+    /// Note that if you are using this to change some property of a window and updating
+    /// `WindowState` then you should call this within the lock of `WindowState`. Otherwise the
+    /// events may be sent to the other thread in different order to the one in which you set
+    /// `WindowState`, leaving them out of sync.
     pub fn execute_in_thread<F>(&self, function: F)
     where
         F: FnMut(Inserter) + Send + 'static,
@@ -357,7 +343,7 @@ lazy_static! {
         }
     };
     // Message sent when we want to execute a closure in the thread.
-    // WPARAM contains a Box<Box<FnMut()>> that must be retreived with `Box::from_raw`,
+    // WPARAM contains a Box<Box<FnMut()>> that must be retrieved with `Box::from_raw`,
     // and LPARAM is unused.
     static ref EXEC_MSG_ID: u32 = {
         unsafe {
@@ -386,12 +372,12 @@ thread_local!(static CONTEXT_STASH: RefCell<Option<ThreadLocalData>> = RefCell::
 struct ThreadLocalData {
     sender: mpsc::Sender<Event>,
     windows: HashMap<HWND, Arc<Mutex<WindowState>>>,
-    win32_block_loop: Arc<(Mutex<bool>, Condvar)>,
-    mouse_buttons_down: u32
+    file_drop_handlers: HashMap<HWND, FileDropHandler>, // Each window has its own drop handler.
+    mouse_buttons_down: u32,
 }
 
 // Utility function that dispatches an event on the current thread.
-fn send_event(event: Event) {
+pub fn send_event(event: Event) {
     CONTEXT_STASH.with(|context_stash| {
         let context_stash = context_stash.borrow();
 
@@ -439,6 +425,30 @@ pub unsafe extern "system" fn callback(
     lparam: LPARAM,
 ) -> LRESULT {
     match msg {
+        winuser::WM_CREATE => {
+            use winapi::shared::winerror::{OLE_E_WRONGCOMPOBJ, RPC_E_CHANGED_MODE};
+            let ole_init_result = ole2::OleInitialize(ptr::null_mut());
+            // It is ok if the initialize result is `S_FALSE` because it might happen that
+            // multiple windows are created on the same thread.
+            if ole_init_result == OLE_E_WRONGCOMPOBJ {
+                panic!("OleInitialize failed! Result was: `OLE_E_WRONGCOMPOBJ`");
+            } else if ole_init_result == RPC_E_CHANGED_MODE {
+                panic!("OleInitialize failed! Result was: `RPC_E_CHANGED_MODE`");
+            }
+
+            CONTEXT_STASH.with(|context_stash| {
+                let mut context_stash = context_stash.borrow_mut();
+
+                let drop_handlers = &mut context_stash.as_mut().unwrap().file_drop_handlers;
+                let new_handler = FileDropHandler::new(window);
+                let handler_interface_ptr = &mut (*new_handler.data).interface as LPDROPTARGET;
+                drop_handlers.insert(window, new_handler);
+
+                assert_eq!(ole2::RegisterDragDrop(window, handler_interface_ptr), S_OK);
+            });
+            0
+        },
+
         winuser::WM_NCCREATE => {
             enable_non_client_dpi_scaling(window);
             winuser::DefWindowProcW(window, msg, wparam, lparam)
@@ -457,7 +467,10 @@ pub unsafe extern "system" fn callback(
             use events::WindowEvent::Destroyed;
             CONTEXT_STASH.with(|context_stash| {
                 let mut context_stash = context_stash.borrow_mut();
-                context_stash.as_mut().unwrap().windows.remove(&window);
+                ole2::RevokeDragDrop(window);
+                let context_stash_mut = context_stash.as_mut().unwrap();
+                context_stash_mut.file_drop_handlers.remove(&window);
+                context_stash_mut.windows.remove(&window);
             });
             send_event(Event::WindowEvent {
                 window_id: SuperWindowId(WindowId(window)),
@@ -514,24 +527,7 @@ pub unsafe extern "system" fn callback(
                     event: Resized(logical_size),
                 };
 
-                // If this window has been inserted into the window map, the resize event happened
-                // during the event loop. If it hasn't, the event happened on window creation and
-                // should be ignored.
-                if cstash.windows.get(&window).is_some() {
-                    let (ref mutex, ref cvar) = *cstash.win32_block_loop;
-                    let mut block_thread = mutex.lock().unwrap();
-                    *block_thread = true;
-
-                    // The event needs to be sent after the lock to ensure that `notify_all` is
-                    // called after `wait`.
-                    cstash.sender.send(event).ok();
-
-                    while *block_thread {
-                        block_thread = cvar.wait(block_thread).unwrap();
-                    }
-                } else {
-                    cstash.sender.send(event).ok();
-                }
+                cstash.sender.send(event).ok();
             });
             0
         },
@@ -1026,24 +1022,7 @@ pub unsafe extern "system" fn callback(
         },
 
         winuser::WM_DROPFILES => {
-            use events::WindowEvent::DroppedFile;
-
-            let hdrop = wparam as shellapi::HDROP;
-            let mut pathbuf: [u16; MAX_PATH] = mem::uninitialized();
-            let num_drops = shellapi::DragQueryFileW(hdrop, 0xFFFFFFFF, ptr::null_mut(), 0);
-
-            for i in 0..num_drops {
-                let nch = shellapi::DragQueryFileW(hdrop, i, pathbuf.as_mut_ptr(),
-                                                  MAX_PATH as u32) as usize;
-                if nch > 0 {
-                    send_event(Event::WindowEvent {
-                        window_id: SuperWindowId(WindowId(window)),
-                        event: DroppedFile(OsString::from_wide(&pathbuf[0..nch]).into())
-                    });
-                }
-            }
-
-            shellapi::DragFinish(hdrop);
+            // See `FileDropHandler` for implementation.
             0
         },
 

src/platform/windows/icon.rs

@@ -22,11 +22,13 @@ pub enum IconType {
     Big = winuser::ICON_BIG as isize,
 }
 
-#[derive(Debug)]
+#[derive(Clone, Debug)]
 pub struct WinIcon {
     pub handle: HICON,
 }
 
+unsafe impl Send for WinIcon {}
+
 impl WinIcon {
     #[allow(dead_code)]
     pub fn from_path<P: AsRef<Path>>(path: P) -> Result<Self, util::WinError> {

src/platform/windows/mod.rs

@@ -18,7 +18,7 @@ unsafe impl Send for PlatformSpecificWindowBuilderAttributes {}
 unsafe impl Sync for PlatformSpecificWindowBuilderAttributes {}
 
 // Cursor name in UTF-16. Used to set cursor in `WM_SETCURSOR`.
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy)]
 pub struct Cursor(pub *const winapi::ctypes::wchar_t);
 unsafe impl Send for Cursor {}
 unsafe impl Sync for Cursor {}
@@ -49,6 +49,7 @@ unsafe impl Send for WindowId {}
 unsafe impl Sync for WindowId {}
 
 mod dpi;
+mod drop_handler;
 mod event;
 mod events_loop;
 mod icon;

src/platform/windows/window.rs

@@ -1,18 +1,19 @@
 #![cfg(target_os = "windows")]
 
-use std::cell::{Cell, RefCell};
-use std::ffi::OsStr;
 use std::{io, mem, ptr};
+use std::cell::Cell;
+use std::ffi::OsStr;
 use std::os::windows::ffi::OsStrExt;
 use std::sync::{Arc, Mutex};
 use std::sync::mpsc::channel;
 
 use winapi::ctypes::c_int;
 use winapi::shared::minwindef::{BOOL, DWORD, FALSE, LPARAM, TRUE, UINT, WORD, WPARAM};
-use winapi::shared::windef::{HDC, HWND, LPPOINT, POINT, RECT};
+use winapi::shared::windef::{HWND, LPPOINT, POINT, RECT};
 use winapi::um::{combaseapi, dwmapi, libloaderapi, winuser};
-use winapi::um::objbase::{COINIT_MULTITHREADED};
+use winapi::um::objbase::COINIT_MULTITHREADED;
 use winapi::um::shobjidl_core::{CLSID_TaskbarList, ITaskbarList2};
+use winapi::um::wingdi::{CreateRectRgn, DeleteObject};
 use winapi::um::winnt::{LONG, LPCWSTR};
 
 use {
@@ -26,8 +27,9 @@ use {
     WindowAttributes,
 };
 use platform::platform::{Cursor, PlatformSpecificWindowBuilderAttributes, WindowId};
-use platform::platform::dpi::{dpi_to_scale_factor, get_window_dpi, get_window_scale_factor};
-use platform::platform::events_loop::{self, DESTROY_MSG_ID, EventsLoop, INITIAL_DPI_MSG_ID};
+use platform::platform::dpi::{dpi_to_scale_factor, get_hwnd_dpi};
+use platform::platform::events_loop::{self, EventsLoop, DESTROY_MSG_ID, INITIAL_DPI_MSG_ID};
+use platform::platform::events_loop::WindowState;
 use platform::platform::icon::{self, IconType, WinIcon};
 use platform::platform::monitor::get_available_monitors;
 use platform::platform::raw_input::register_all_mice_and_keyboards_for_raw_input;
@@ -40,25 +42,13 @@ pub struct Window {
     /// Main handle for the window.
     window: WindowWrapper,
 
-    decorations: Cell<bool>,
-    maximized: Cell<bool>,
-    resizable: Cell<bool>,
-    fullscreen: RefCell<Option<::MonitorId>>,
-    always_on_top: Cell<bool>,
-
     /// The current window state.
-    window_state: Arc<Mutex<events_loop::WindowState>>,
-
-    window_icon: Cell<Option<WinIcon>>,
-    taskbar_icon: Cell<Option<WinIcon>>,
+    window_state: Arc<Mutex<WindowState>>,
 
     // The events loop proxy.
     events_loop_proxy: events_loop::EventsLoopProxy,
 }
 
-unsafe impl Send for Window {}
-unsafe impl Sync for Window {}
-
 // https://blogs.msdn.microsoft.com/oldnewthing/20131017-00/?p=2903
 // The idea here is that we use the Adjust­Window­Rect­Ex function to calculate how much additional
 // non-client area gets added due to the styles we passed. To make the math simple,
@@ -283,32 +273,25 @@ impl Window {
 
     #[inline]
     pub fn set_resizable(&self, resizable: bool) {
-        if resizable == self.resizable.get() {
-            return;
-        }
-        if self.fullscreen.borrow().is_some() {
+        let mut window_state = self.window_state.lock().unwrap();
+        if mem::replace(&mut window_state.resizable, resizable) != resizable {
             // If we're in fullscreen, update stored configuration but don't apply anything.
-            self.resizable.replace(resizable);
-            return;
-        }
+            if window_state.fullscreen.is_none() {
+                let mut style = unsafe {
+                    winuser::GetWindowLongW(self.window.0, winuser::GWL_STYLE)
+                };
 
-        let mut style = unsafe {
-            winuser::GetWindowLongW(self.window.0, winuser::GWL_STYLE)
-        };
-        if resizable {
-            style |= WS_RESIZABLE as LONG;
-        } else {
-            style &= !WS_RESIZABLE as LONG;
-        }
+                if resizable {
+                    style |= WS_RESIZABLE as LONG;
+                } else {
+                    style &= !WS_RESIZABLE as LONG;
+                }
 
-        unsafe {
-            winuser::SetWindowLongW(
-                self.window.0,
-                winuser::GWL_STYLE,
-                style as _,
-            );
-        };
-        self.resizable.replace(resizable);
+                unsafe {
+                    winuser::SetWindowLongW(self.window.0, winuser::GWL_STYLE, style as _);
+                };
+            }
+        }
     }
 
     /// Returns the `hwnd` of this window.
@@ -319,7 +302,7 @@ impl Window {
 
     #[inline]
     pub fn set_cursor(&self, cursor: MouseCursor) {
-        let cursor_id = match cursor {
+        let cursor_id = Cursor(match cursor {
             MouseCursor::Arrow | MouseCursor::Default => winuser::IDC_ARROW,
             MouseCursor::Hand => winuser::IDC_HAND,
             MouseCursor::Crosshair => winuser::IDC_CROSS,
@@ -339,10 +322,15 @@ impl Window {
             MouseCursor::Progress => winuser::IDC_APPSTARTING,
             MouseCursor::Help => winuser::IDC_HELP,
             _ => winuser::IDC_ARROW, // use arrow for the missing cases.
-        };
-
-        let mut cur = self.window_state.lock().unwrap();
-        cur.cursor = Cursor(cursor_id);
+        });
+        self.window_state.lock().unwrap().cursor = cursor_id;
+        self.events_loop_proxy.execute_in_thread(move |_| unsafe {
+            let cursor = winuser::LoadCursorW(
+                ptr::null_mut(),
+                cursor_id.0,
+            );
+            winuser::SetCursor(cursor);
+        });
     }
 
     unsafe fn cursor_is_grabbed(&self) -> Result<bool, String> {
@@ -391,15 +379,12 @@ impl Window {
     #[inline]
     pub fn grab_cursor(&self, grab: bool) -> Result<(), String> {
         let currently_grabbed = unsafe { self.cursor_is_grabbed() }?;
-        let window_state = Arc::clone(&self.window_state);
-        {
-            let window_state_lock = window_state.lock().unwrap();
-            if currently_grabbed == grab
-            && grab == window_state_lock.cursor_grabbed {
-                return Ok(());
-            }
+        let window_state_lock = self.window_state.lock().unwrap();
+        if currently_grabbed == grab && grab == window_state_lock.cursor_grabbed {
+            return Ok(());
         }
         let window = self.window.clone();
+        let window_state = Arc::clone(&self.window_state);
         let (tx, rx) = channel();
         self.events_loop_proxy.execute_in_thread(move |_| {
             let result = unsafe { Self::grab_cursor_inner(&window, grab) };
@@ -408,6 +393,7 @@ impl Window {
             }
             let _ = tx.send(result);
         });
+        drop(window_state_lock);
         rx.recv().unwrap()
     }
 
@@ -421,24 +407,23 @@ impl Window {
 
     #[inline]
     pub fn hide_cursor(&self, hide: bool) {
-        let window_state = Arc::clone(&self.window_state);
-        {
-            let window_state_lock = window_state.lock().unwrap();
-            // We don't want to increment/decrement the display count more than once!
-            if hide == window_state_lock.cursor_hidden { return; }
-        }
+        let window_state_lock = self.window_state.lock().unwrap();
+        // We don't want to increment/decrement the display count more than once!
+        if hide == window_state_lock.cursor_hidden { return; }
         let (tx, rx) = channel();
+        let window_state = Arc::clone(&self.window_state);
         self.events_loop_proxy.execute_in_thread(move |_| {
             unsafe { Self::hide_cursor_inner(hide) };
             window_state.lock().unwrap().cursor_hidden = hide;
             let _ = tx.send(());
         });
+        drop(window_state_lock);
         rx.recv().unwrap()
     }
 
     #[inline]
     pub fn get_hidpi_factor(&self) -> f64 {
-        get_window_scale_factor(self.window.0, self.window.1)
+        self.window_state.lock().unwrap().dpi_factor
     }
 
     fn set_cursor_position_physical(&self, x: i32, y: i32) -> Result<(), String> {
@@ -468,32 +453,32 @@ impl Window {
 
     #[inline]
     pub fn set_maximized(&self, maximized: bool) {
-        self.maximized.replace(maximized);
-        // We only maximize if we're not in fullscreen.
-        if self.fullscreen.borrow().is_some() { return; }
-
-        let window = self.window.clone();
-        unsafe {
-            // `ShowWindow` resizes the window, so it must be called from the main thread.
-            self.events_loop_proxy.execute_in_thread(move |_| {
-                winuser::ShowWindow(
-                    window.0,
-                    if maximized {
-                        winuser::SW_MAXIMIZE
-                    } else {
-                        winuser::SW_RESTORE
-                    },
-                );
-            });
+        let mut window_state = self.window_state.lock().unwrap();
+        if mem::replace(&mut window_state.maximized, maximized) != maximized {
+            // We only maximize if we're not in fullscreen.
+            if window_state.fullscreen.is_none() {
+                let window = self.window.clone();
+                unsafe {
+                    // `ShowWindow` resizes the window, so it must be called from the main thread.
+                    self.events_loop_proxy.execute_in_thread(move |_| {
+                        winuser::ShowWindow(
+                            window.0,
+                            if maximized {
+                                winuser::SW_MAXIMIZE
+                            } else {
+                                winuser::SW_RESTORE
+                            },
+                        );
+                    });
+                }
+            }
         }
     }
 
-    unsafe fn set_fullscreen_style(&self) -> (LONG, LONG) {
-        let mut window_state = self.window_state.lock().unwrap();
-
-        if self.fullscreen.borrow().is_none() || window_state.saved_window_info.is_none() {
+    unsafe fn set_fullscreen_style(&self, window_state: &mut WindowState) -> (LONG, LONG) {
+        if window_state.fullscreen.is_none() || window_state.saved_window_info.is_none() {
             let rect = util::get_window_rect(self.window.0).expect("`GetWindowRect` failed");
-            let dpi_factor = Some(self.get_hidpi_factor());
+            let dpi_factor = Some(window_state.dpi_factor);
             window_state.saved_window_info = Some(events_loop::SavedWindowInfo {
                 style: winuser::GetWindowLongW(self.window.0, winuser::GWL_STYLE),
                 ex_style: winuser::GetWindowLongW(self.window.0, winuser::GWL_EXSTYLE),
@@ -507,16 +492,14 @@ impl Window {
         let mut placement: winuser::WINDOWPLACEMENT = mem::zeroed();
         placement.length = mem::size_of::<winuser::WINDOWPLACEMENT>() as u32;
         winuser::GetWindowPlacement(self.window.0, &mut placement);
-        self.maximized.replace(placement.showCmd == (winuser::SW_SHOWMAXIMIZED as u32));
+        window_state.maximized = placement.showCmd == (winuser::SW_SHOWMAXIMIZED as u32);
         let saved_window_info = window_state.saved_window_info.as_ref().unwrap();
 
         (saved_window_info.style, saved_window_info.ex_style)
     }
 
-    unsafe fn restore_saved_window(&self) {
+    unsafe fn restore_saved_window(&self, window_state_lock: &mut WindowState) {
         let (rect, mut style, ex_style) = {
-            let mut window_state_lock = self.window_state.lock().unwrap();
-
             // 'saved_window_info' can be None if the window has never been
             // in fullscreen mode before this method gets called.
             if window_state_lock.saved_window_info.is_none() {
@@ -537,8 +520,8 @@ impl Window {
         let window = self.window.clone();
         let window_state = Arc::clone(&self.window_state);
 
-        let maximized = self.maximized.get();
-        let resizable = self.resizable.get();
+        let resizable = window_state_lock.resizable;
+        let maximized = window_state_lock.maximized;
 
         // We're restoring the window to its size and position from before being fullscreened.
         // `ShowWindow` resizes the window, so it must be called from the main thread.
@@ -585,6 +568,7 @@ impl Window {
 
     #[inline]
     pub fn set_fullscreen(&self, monitor: Option<RootMonitorId>) {
+        let mut window_state_lock = self.window_state.lock().unwrap();
         unsafe {
             match &monitor {
                 &Some(RootMonitorId { ref inner }) => {
@@ -593,8 +577,7 @@ impl Window {
                     let window = self.window.clone();
                     let window_state = Arc::clone(&self.window_state);
 
-                    let (style, ex_style) = self.set_fullscreen_style();
-
+                    let (style, ex_style) = self.set_fullscreen_style(&mut window_state_lock);
                     self.events_loop_proxy.execute_in_thread(move |_| {
                         let _ = Self::grab_cursor_inner(&window, false);
 
@@ -634,27 +617,23 @@ impl Window {
                     });
                 }
                 &None => {
-                    self.restore_saved_window();
+                    self.restore_saved_window(&mut window_state_lock);
                 }
             }
         }
 
-        self.fullscreen.replace(monitor);
+        window_state_lock.fullscreen = monitor;
     }
 
     #[inline]
     pub fn set_decorations(&self, decorations: bool) {
-        if self.decorations.get() == decorations {
-            return;
-        }
-
+        let mut window_state = self.window_state.lock().unwrap();
+        if mem::replace(&mut window_state.decorations, decorations) != decorations {
         let style_flags = (winuser::WS_CAPTION | winuser::WS_THICKFRAME) as LONG;
         let ex_style_flags = (winuser::WS_EX_WINDOWEDGE) as LONG;
 
-        // if we are in fullscreen mode, we only change the saved window info
-        if self.fullscreen.borrow().is_some() {
-            {
-                let mut window_state = self.window_state.lock().unwrap();
+            // if we are in fullscreen mode, we only change the saved window info
+            if window_state.fullscreen.is_some() {
                 let saved = window_state.saved_window_info.as_mut().unwrap();
 
                 unsafe {
@@ -677,81 +656,73 @@ impl Window {
                         saved.ex_style as _,
                     );
                 }
-            }
-
-            self.decorations.replace(decorations);
-            return;
-        }
-
-        unsafe {
-            let mut rect: RECT = mem::zeroed();
-            winuser::GetWindowRect(self.window.0, &mut rect);
-
-            let mut style = winuser::GetWindowLongW(self.window.0, winuser::GWL_STYLE);
-            let mut ex_style = winuser::GetWindowLongW(self.window.0, winuser::GWL_EXSTYLE);
-            unjust_window_rect(&mut rect, style as _, ex_style as _);
-
-            if decorations {
-                style = style | style_flags;
-                ex_style = ex_style | ex_style_flags;
             } else {
-                style = style & !style_flags;
-                ex_style = ex_style & !ex_style_flags;
+                unsafe {
+                    let mut rect: RECT = mem::zeroed();
+                    winuser::GetWindowRect(self.window.0, &mut rect);
+
+                    let mut style = winuser::GetWindowLongW(self.window.0, winuser::GWL_STYLE);
+                    let mut ex_style = winuser::GetWindowLongW(self.window.0, winuser::GWL_EXSTYLE);
+                    unjust_window_rect(&mut rect, style as _, ex_style as _);
+
+                    if decorations {
+                        style = style | style_flags;
+                        ex_style = ex_style | ex_style_flags;
+                    } else {
+                        style = style & !style_flags;
+                        ex_style = ex_style & !ex_style_flags;
+                    }
+
+                    let window = self.window.clone();
+
+                    self.events_loop_proxy.execute_in_thread(move |_| {
+                        winuser::SetWindowLongW(window.0, winuser::GWL_STYLE, style);
+                        winuser::SetWindowLongW(window.0, winuser::GWL_EXSTYLE, ex_style);
+                        winuser::AdjustWindowRectEx(&mut rect, style as _, 0, ex_style as _);
+
+                        winuser::SetWindowPos(
+                            window.0,
+                            ptr::null_mut(),
+                            rect.left,
+                            rect.top,
+                            rect.right - rect.left,
+                            rect.bottom - rect.top,
+                            winuser::SWP_ASYNCWINDOWPOS
+                            | winuser::SWP_NOZORDER
+                            | winuser::SWP_NOACTIVATE
+                            | winuser::SWP_FRAMECHANGED,
+                        );
+                    });
+                }
             }
-
-            let window = self.window.clone();
-
-            self.events_loop_proxy.execute_in_thread(move |_| {
-                winuser::SetWindowLongW(window.0, winuser::GWL_STYLE, style);
-                winuser::SetWindowLongW(window.0, winuser::GWL_EXSTYLE, ex_style);
-                winuser::AdjustWindowRectEx(&mut rect, style as _, 0, ex_style as _);
-
-                winuser::SetWindowPos(
-                    window.0,
-                    ptr::null_mut(),
-                    rect.left,
-                    rect.top,
-                    rect.right - rect.left,
-                    rect.bottom - rect.top,
-                    winuser::SWP_ASYNCWINDOWPOS
-                    | winuser::SWP_NOZORDER
-                    | winuser::SWP_NOACTIVATE
-                    | winuser::SWP_FRAMECHANGED,
-                );
-            });
         }
-
-        self.decorations.replace(decorations);
     }
 
     #[inline]
     pub fn set_always_on_top(&self, always_on_top: bool) {
-        if self.always_on_top.get() == always_on_top {
-            return;
+        let mut window_state = self.window_state.lock().unwrap();
+        if mem::replace(&mut window_state.always_on_top, always_on_top) != always_on_top {
+            let window = self.window.clone();
+            self.events_loop_proxy.execute_in_thread(move |_| {
+                let insert_after = if always_on_top {
+                    winuser::HWND_TOPMOST
+                } else {
+                    winuser::HWND_NOTOPMOST
+                };
+                unsafe {
+                    winuser::SetWindowPos(
+                        window.0,
+                        insert_after,
+                        0,
+                        0,
+                        0,
+                        0,
+                        winuser::SWP_ASYNCWINDOWPOS | winuser::SWP_NOMOVE | winuser::SWP_NOSIZE,
+                    );
+                    winuser::UpdateWindow(window.0);
+                }
+            });
         }
-
-        let window = self.window.clone();
-        self.events_loop_proxy.execute_in_thread(move |_| {
-            let insert_after = if always_on_top {
-                winuser::HWND_TOPMOST
-            } else {
-                winuser::HWND_NOTOPMOST
-            };
-            unsafe {
-                winuser::SetWindowPos(
-                    window.0,
-                    insert_after,
-                    0,
-                    0,
-                    0,
-                    0,
-                    winuser::SWP_ASYNCWINDOWPOS | winuser::SWP_NOMOVE | winuser::SWP_NOSIZE,
-                );
-                winuser::UpdateWindow(window.0);
-            }
-        });
-
-        self.always_on_top.replace(always_on_top);
     }
 
     #[inline]
@@ -771,7 +742,7 @@ impl Window {
         } else {
             icon::unset_for_window(self.window.0, IconType::Small);
         }
-        self.window_icon.replace(window_icon);
+        self.window_state.lock().unwrap().window_icon = window_icon;
     }
 
     #[inline]
@@ -784,7 +755,7 @@ impl Window {
         } else {
             icon::unset_for_window(self.window.0, IconType::Big);
         }
-        self.taskbar_icon.replace(taskbar_icon);
+        self.window_state.lock().unwrap().taskbar_icon = taskbar_icon;
     }
 
     #[inline]
@@ -807,17 +778,27 @@ impl Drop for Window {
 /// A simple non-owning wrapper around a window.
 #[doc(hidden)]
 #[derive(Clone)]
-pub struct WindowWrapper(HWND, HDC);
+pub struct WindowWrapper(HWND);
 
-// Send is not implemented for HWND and HDC, we have to wrap it and implement it manually.
+// Send and Sync are not implemented for HWND and HDC, we have to wrap it and implement them manually.
 // For more info see:
 // https://github.com/retep998/winapi-rs/issues/360
 // https://github.com/retep998/winapi-rs/issues/396
+unsafe impl Sync for WindowWrapper {}
 unsafe impl Send for WindowWrapper {}
 
-pub unsafe fn adjust_size(physical_size: PhysicalSize, style: DWORD, ex_style: DWORD) -> (LONG, LONG) {
+pub unsafe fn adjust_size(
+    physical_size: PhysicalSize,
+    style: DWORD,
+    ex_style: DWORD,
+) -> (LONG, LONG) {
     let (width, height): (u32, u32) = physical_size.into();
-    let mut rect = RECT { left: 0, right: width as LONG, top: 0, bottom: height as LONG };
+    let mut rect = RECT {
+        left: 0,
+        right: width as LONG,
+        top: 0,
+        bottom: height as LONG,
+    };
     winuser::AdjustWindowRectEx(&mut rect, style, 0, ex_style);
     (rect.right - rect.left, rect.bottom - rect.top)
 }
@@ -923,6 +904,9 @@ unsafe fn init(
     if pl_attribs.no_redirection_bitmap {
         ex_style |= winuser::WS_EX_NOREDIRECTIONBITMAP;
     }
+    if attributes.transparent && attributes.decorations {
+        ex_style |= winuser::WS_EX_LAYERED;
+    }
 
     // adjusting the window coordinates using the style
     winuser::AdjustWindowRectEx(&mut rect, style, 0, ex_style);
@@ -978,13 +962,7 @@ unsafe fn init(
                                               format!("{}", io::Error::last_os_error()))));
         }
 
-        let hdc = winuser::GetDC(handle);
-        if hdc.is_null() {
-            return Err(CreationError::OsError(format!("GetDC function failed: {}",
-                                              format!("{}", io::Error::last_os_error()))));
-        }
-
-        WindowWrapper(handle, hdc)
+        WindowWrapper(handle)
     };
 
     // Set up raw input
@@ -998,7 +976,7 @@ unsafe fn init(
         }
     }
 
-    let dpi = get_window_dpi(real_window.0, real_window.1);
+    let dpi = get_hwnd_dpi(real_window.0);
     let dpi_factor = dpi_to_scale_factor(dpi);
     if dpi_factor != guessed_dpi_factor {
         let (width, height): (u32, u32) = dimensions.into();
@@ -1029,6 +1007,13 @@ unsafe fn init(
             mouse_in_window: false,
             saved_window_info: None,
             dpi_factor,
+            fullscreen: attributes.fullscreen.clone(),
+            window_icon,
+            taskbar_icon,
+            decorations: attributes.decorations,
+            maximized: attributes.maximized,
+            resizable: attributes.resizable,
+            always_on_top: attributes.always_on_top,
         };
         // Creating a mutex to track the current window state
         Arc::new(Mutex::new(window_state))
@@ -1036,26 +1021,34 @@ unsafe fn init(
 
     // making the window transparent
     if attributes.transparent && !pl_attribs.no_redirection_bitmap {
+        let region = CreateRectRgn(0, 0, -1, -1); // makes the window transparent
+
         let bb = dwmapi::DWM_BLURBEHIND {
-            dwFlags: 0x1, // FIXME: DWM_BB_ENABLE;
+            dwFlags: dwmapi::DWM_BB_ENABLE | dwmapi::DWM_BB_BLURREGION,
             fEnable: 1,
-            hRgnBlur: ptr::null_mut(),
+            hRgnBlur: region,
             fTransitionOnMaximized: 0,
         };
 
         dwmapi::DwmEnableBlurBehindWindow(real_window.0, &bb);
+        DeleteObject(region as _);
+
+        if attributes.decorations {
+            // HACK: When opaque (opacity 255), there is a trail whenever
+            // the transparent window is moved. By reducing it to 254,
+            // the window is rendered properly.
+            let opacity = 254;
+
+            // The color key can be any value except for black (0x0).
+            let color_key = 0x0030c100;
+
+            winuser::SetLayeredWindowAttributes(real_window.0, color_key, opacity, winuser::LWA_ALPHA);
+        }
     }
 
     let win = Window {
         window: real_window,
-        window_state: window_state,
-        decorations: Cell::new(attributes.decorations),
-        maximized: Cell::new(attributes.maximized.clone()),
-        resizable: Cell::new(attributes.resizable.clone()),
-        fullscreen: RefCell::new(attributes.fullscreen.clone()),
-        always_on_top: Cell::new(attributes.always_on_top),
-        window_icon: Cell::new(window_icon),
-        taskbar_icon: Cell::new(taskbar_icon),
+        window_state,
         events_loop_proxy,
     };
 
@@ -1112,7 +1105,6 @@ unsafe fn register_window_class(
     class_name
 }
 
-
 struct ComInitialized(*mut ());
 impl Drop for ComInitialized {
     fn drop(&mut self) {

src/window.rs

@@ -304,6 +304,10 @@ impl Window {
     ///
     /// See the [`dpi`](dpi/index.html) module for more information.
     ///
+    /// Note that this value can change depending on user action (for example if the window is
+    /// moved to another screen); as such, tracking `WindowEvent::HiDpiFactorChanged` events is
+    /// the most robust way to track the DPI you need to use to draw.
+    ///
     /// ## Platform-specific
     ///
     /// - **X11:** Can be overridden using the `WINIT_HIDPI_FACTOR` environment variable.

tests/serde_objects.rs

@@ -0,0 +1,39 @@
+#![cfg(feature = "serde")]
+
+extern crate serde;
+extern crate winit;
+
+use winit::{ControlFlow, MouseCursor};
+use winit::{
+    KeyboardInput, TouchPhase, ElementState, MouseButton, MouseScrollDelta, VirtualKeyCode,
+    ModifiersState
+};
+use winit::dpi::{LogicalPosition, PhysicalPosition, LogicalSize, PhysicalSize};
+use serde::{Serialize, Deserialize};
+
+fn needs_serde<S: Serialize + Deserialize<'static>>() {}
+
+#[test]
+fn root_serde() {
+    needs_serde::<ControlFlow>();
+    needs_serde::<MouseCursor>();
+}
+
+#[test]
+fn events_serde() {
+    needs_serde::<KeyboardInput>();
+    needs_serde::<TouchPhase>();
+    needs_serde::<ElementState>();
+    needs_serde::<MouseButton>();
+    needs_serde::<MouseScrollDelta>();
+    needs_serde::<VirtualKeyCode>();
+    needs_serde::<ModifiersState>();
+}
+
+#[test]
+fn dpi_serde() {
+    needs_serde::<LogicalPosition>();
+    needs_serde::<PhysicalPosition>();
+    needs_serde::<LogicalSize>();
+    needs_serde::<PhysicalSize>();
+}