Module v0_30

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§0.30.5

§Added

Add ActiveEventLoop::system_theme(), returning the current system theme.
On Web, implement Error for platform::web::CustomCursorError.
On Android, add {Active,}EventLoopExtAndroid::android_app() to access the app used to create the loop.

§Fixed

On MacOS, fix building with feature = "rwh_04".
On Web, pen events are now routed through to WindowEvent::Cursor*.
On macOS, fix panic when releasing not available monitor.
On MacOS, return the system theme in Window::theme() if no theme override is set.

§0.30.4

§Changed

DeviceId::dummy() and WindowId::dummy() are no longer marked unsafe.

§Fixed

On Wayland, avoid crashing when compositor is misbehaving.
On Web, fix WindowEvent::Resized not using requestAnimationFrame when sending WindowEvent::RedrawRequested and also potentially causing WindowEvent::RedrawRequested to not be de-duplicated.
Account for different browser engine implementations of pointer movement coordinate space.

§0.30.3

§Added

On Web, add EventLoopExtWebSys::(set_)poll_strategy() to allow setting control flow strategies before starting the event loop.
On Web, add WaitUntilStrategy, which allows to set different strategies for ControlFlow::WaitUntil. By default the Prioritized Task Scheduling API is used, with a fallback to setTimeout() with a trick to circumvent throttling to 4ms. But an option to use a Web worker to schedule the timer is available as well, which commonly prevents any throttling when the window is not focused.

§Changed

On macOS, set the window theme on the NSWindow instead of application-wide.

§Fixed

On X11, build on arm platforms.
On macOS, fixed WindowBuilder::with_theme not having any effect on the window.

§0.30.2

§Fixed

On Web, fix EventLoopProxy::send_event() triggering event loop immediately when not called from inside the event loop. Now queues a microtask instead.
On Web, stop overwriting default cursor with CursorIcon::Default.
On Web, prevent crash when using InnerSizeWriter::request_inner_size().
On macOS, fix not working opacity for entire window.

§0.30.1

§Added

Reexport raw-window-handle versions 0.4 and 0.5 as raw_window_handle_04 and raw_window_handle_05.
Implement ApplicationHandler for &mut references and heap allocations to something that implements ApplicationHandler.
Add traits EventLoopExtWayland and EventLoopExtX11, providing methods is_wayland and is_x11 on EventLoop.

§Fixed

On macOS, fix panic on exit when dropping windows outside the event loop.
On macOS, fix window dragging glitches when dragging across a monitor boundary with different scale factor.
On macOS, fix the range in Ime::Preedit.
On macOS, use the system’s internal mechanisms for queuing events.
On macOS, handle events directly instead of queuing when possible.

§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.

Module v0_30Copy item path

§0.30.5

§Added

§Fixed

§0.30.4

§Changed

§Fixed

§0.30.3

§Added

§Changed

§Fixed

§0.30.2

§Fixed

§0.30.1

§Added

§Fixed

§0.30.0

§Added

§Changed

§Deprecated

§Removed

§Fixed

Module v0_30