Winit version 0.30.0

Added

• Add OwnedDisplayHandle type for allowing safe display handle usage outside of
  trivial cases.
• Add ApplicationHandler<T> trait which mimics Event<T>.
• Add WindowBuilder::with_cursor and Window::set_cursor which takes a
  CursorIcon or CustomCursor.
• Add Sync implementation for EventLoopProxy<T: Send>.
• Add Window::default_attributes to get default WindowAttributes.
• Add EventLoop::builder to get EventLoopBuilder without export.
• Add CustomCursor::from_rgba to allow creating cursor images from RGBA data.
• Add CustomCursorExtWebSys::from_url to allow loading cursor images from URLs.
• Add CustomCursorExtWebSys::from_animation to allow creating animated
  cursors from other CustomCursors.
• Add {Active,}EventLoop::create_custom_cursor to load custom cursor image sources.
• Add ActiveEventLoop::create_window and EventLoop::create_window.
• Add CustomCursor which could be set via Window::set_cursor, implemented on
  Windows, macOS, X11, Wayland, and Web.
• On Web, add to toggle calling Event.preventDefault() on Window.
• On iOS, add PinchGesture, DoubleTapGesture, PanGesture and RotationGesture.
• on iOS, use UIGestureRecognizerDelegate for fine grained control of gesture recognizers.
• On macOS, add services menu.
• On Windows, add with_title_text_color, and with_corner_preference on
  WindowAttributesExtWindows.
• On Windows, implement resize increments.
• On Windows, add AnyThread API to access window handle off the main thread.

Changed

• Bump MSRV from 1.65 to 1.70.
• On Wayland, bump sctk-adwaita to 0.9.0, which changed system library
  crates. This change is a cascading breaking change, you must do breaking
  change as well, even if you don't expose winit.
• Rename TouchpadMagnify to PinchGesture.
• Rename SmartMagnify to DoubleTapGesture.
• Rename TouchpadRotate to RotationGesture.
• Rename EventLoopWindowTarget to ActiveEventLoop.
• Rename platform::x11::XWindowType to platform::x11::WindowType.
• Rename VideoMode to VideoModeHandle to represent that it doesn't hold
  static data.
• Make Debug formatting of WindowId more concise.
• Move dpi types to its own crate, and re-export it from the root crate.
• Replace log with tracing, use log feature on tracing to restore old
  behavior.
• EventLoop::with_user_event now returns EventLoopBuilder.
• On Web, return HandleError::Unavailable when a window handle is not available.
• On Web, return RawWindowHandle::WebCanvas instead of RawWindowHandle::Web.
• On Web, remove queuing fullscreen request in absence of transient activation.
• On iOS, return HandleError::Unavailable when a window handle is not available.
• On macOS, return HandleError::Unavailable when a window handle is not available.
• On Windows, remove WS_CAPTION, WS_BORDER, and WS_EX_WINDOWEDGE styles
  for child windows without decorations.
• On Android, bump ndk to 0.9.0 and android-activity to 0.6.0,
  and remove unused direct dependency on ndk-sys.

Deprecated

• Deprecate EventLoop::run, use EventLoop::run_app.

• Deprecate EventLoopExtRunOnDemand::run_on_demand, use EventLoop::run_app_on_demand.

• Deprecate EventLoopExtPumpEvents::pump_events, use EventLoopExtPumpEvents::pump_app_events.

  The new app APIs accept a newly added ApplicationHandler<T> instead of
  Fn. The semantics are mostly the same, given that the capture list of the
  closure is your new State. Consider the following code:

  use winit::event::Event;
  use winit::event_loop::EventLoop;
  use winit::window::Window;
  
  struct MyUserEvent;
  
  let event_loop = EventLoop::<MyUserEvent>::with_user_event().build().unwrap();
  let window = event_loop.create_window(Window::default_attributes()).unwrap();
  let mut counter = 0;
  
  let _ = event_loop.run(move |event, event_loop| {
      match event {
          Event::AboutToWait => {
              window.request_redraw();
              counter += 1;
          }
          Event::WindowEvent { window_id, event } => {
              // Handle window event.
          }
          Event::UserEvent(event) => {
              // Handle user event.
          }
          Event::DeviceEvent { device_id, event } => {
              // Handle device event.
          }
          _ => (),
      }
  });

  To migrate this code, you should move all the captured values into some
  newtype State and implement ApplicationHandler for this type. Finally,
  we move particular match event arms into methods on ApplicationHandler,
  for example:

  use winit::application::ApplicationHandler;
  use winit::event::{Event, WindowEvent, DeviceEvent, DeviceId};
  use winit::event_loop::{EventLoop, ActiveEventLoop};
  use winit::window::{Window, WindowId};
  
  struct MyUserEvent;
  
  struct State {
      window: Window,
      counter: i32,
  }
  
  impl ApplicationHandler<MyUserEvent> for State {
      fn user_event(&mut self, event_loop: &ActiveEventLoop, user_event: MyUserEvent) {
          // Handle user event.
      }
  
      fn resumed(&mut self, event_loop: &ActiveEventLoop) {
          // Your application got resumed.
      }
  
      fn window_event(&mut self, event_loop: &ActiveEventLoop, window_id: WindowId, event: WindowEvent) {
          // Handle window event.
      }
  
      fn device_event(&mut self, event_loop: &ActiveEventLoop, device_id: DeviceId, event: DeviceEvent) {
          // Handle device event.
      }
  
      fn about_to_wait(&mut self, event_loop: &ActiveEventLoop) {
          self.window.request_redraw();
          self.counter += 1;
      }
  }
  
  let event_loop = EventLoop::<MyUserEvent>::with_user_event().build().unwrap();
  #[allow(deprecated)]
  let window = event_loop.create_window(Window::default_attributes()).unwrap();
  let mut state = State { window, counter: 0 };
  
  let _ = event_loop.run_app(&mut state);

  Please submit your feedback after migrating in this issue.

• Deprecate Window::set_cursor_icon, use Window::set_cursor.

Removed

• Remove Window::new, use ActiveEventLoop::create_window instead.

  You now have to create your windows inside the actively running event loop
  (usually the new_events(cause: StartCause::Init) or resumed() events),
  and can no longer do it before the application has properly launched.
  This change is done to fix many long-standing issues on iOS and macOS, and
  will improve things on Wayland once fully implemented.

  To ease migration, we provide the deprecated EventLoop::create_window that
  will allow you to bypass this restriction in this release.

  Using the migration example from above, you can change your code as follows:

  use winit::application::ApplicationHandler;
  use winit::event::{Event, WindowEvent, DeviceEvent, DeviceId};
  use winit::event_loop::{EventLoop, ActiveEventLoop};
  use winit::window::{Window, WindowId};
  
  #[derive(Default)]
  struct State {
      // Use an `Option` to allow the window to not be available until the
      // application is properly running.
      window: Option<Window>,
      counter: i32,
  }
  
  impl ApplicationHandler for State {
      // This is a common indicator that you can create a window.
      fn resumed(&mut self, event_loop: &ActiveEventLoop) {
          self.window = Some(event_loop.create_window(Window::default_attributes()).unwrap());
      }
      fn window_event(&mut self, event_loop: &ActiveEventLoop, window_id: WindowId, event: WindowEvent) {
          // `unwrap` is fine, the window will always be available when
          // receiving a window event.
          let window = self.window.as_ref().unwrap();
          // Handle window event.
      }
      fn device_event(&mut self, event_loop: &ActiveEventLoop, device_id: DeviceId, event: DeviceEvent) {
          // Handle window event.
      }
      fn about_to_wait(&mut self, event_loop: &ActiveEventLoop) {
          if let Some(window) = self.window.as_ref() {
              window.request_redraw();
              self.counter += 1;
          }
      }
  }
  
  let event_loop = EventLoop::new().unwrap();
  let mut state = State::default();
  let _ = event_loop.run_app(&mut state);

• Remove Deref implementation for EventLoop that gave EventLoopWindowTarget.

• Remove WindowBuilder in favor of WindowAttributes.

• Remove Generic parameter T from ActiveEventLoop.

• Remove EventLoopBuilder::with_user_event, use EventLoop::with_user_event.

• Remove Redundant EventLoopError::AlreadyRunning.

• Remove WindowAttributes::fullscreen and expose as field directly.

• On X11, remove platform::x11::XNotSupported export.

Fixed

• On Web, fix setting cursor icon overriding cursor visibility.
• On Windows, fix cursor not confined to center of window when grabbed and hidden.
• On macOS, fix sequence of mouse events being out of order when dragging on the trackpad.
• On Wayland, fix decoration glitch on close with some compositors.
• On Android, fix a regression introduced in #2748 to allow volume key events to be received again.
• On Windows, don't return a valid window handle outside of the GUI thread.
• On macOS, don't set the background color when initializing a window with transparency.