Introduce window::Id to Event subscriptions

And remove `window::Id` from `Event` altogether.

core/src/event.rs

@@ -19,7 +19,7 @@ pub enum Event {
     Mouse(mouse::Event),
 
     /// A window event
-    Window(window::Id, window::Event),
+    Window(window::Event),
 
     /// A touch event
     Touch(touch::Event),

examples/events/src/main.rs

@@ -37,9 +37,8 @@ impl Events {
                 Command::none()
             }
             Message::EventOccurred(event) => {
-                if let Event::Window(id, window::Event::CloseRequested) = event
+                if let Event::Window(window::Event::CloseRequested) = event {
-                {
+                    window::close(window::Id::MAIN)
-                    window::close(id)
                 } else {
                     Command::none()
                 }

examples/integration/src/main.rs

@@ -9,7 +9,6 @@ use iced_wgpu::{wgpu, Engine, Renderer};
 use iced_winit::conversion;
 use iced_winit::core::mouse;
 use iced_winit::core::renderer;
-use iced_winit::core::window;
 use iced_winit::core::{Color, Font, Pixels, Size, Theme};
 use iced_winit::futures;
 use iced_winit::runtime::program;
@@ -317,7 +316,6 @@ pub fn main() -> Result<(), winit::error::EventLoopError> {
 
             // Map window event to iced event
             if let Some(event) = iced_winit::conversion::window_event(
-                window::Id::MAIN,
                 event,
                 window.scale_factor(),
                 *modifiers,

examples/loading_spinners/src/circular.rs

@@ -275,7 +275,7 @@ where
     ) -> event::Status {
         let state = tree.state.downcast_mut::<State>();
 
-        if let Event::Window(_, window::Event::RedrawRequested(now)) = event {
+        if let Event::Window(window::Event::RedrawRequested(now)) = event {
             state.animation = state.animation.timed_transition(
                 self.cycle_duration,
                 self.rotation_duration,

examples/loading_spinners/src/linear.rs

@@ -189,7 +189,7 @@ where
     ) -> event::Status {
         let state = tree.state.downcast_mut::<State>();
 
-        if let Event::Window(_, window::Event::RedrawRequested(now)) = event {
+        if let Event::Window(window::Event::RedrawRequested(now)) = event {
             *state = state.timed_transition(self.cycle_duration, now);
 
             shell.request_redraw(RedrawRequest::NextFrame);

examples/multi_window/src/main.rs

@@ -145,16 +145,18 @@ impl multi_window::Application for Example {
     }
 
     fn subscription(&self) -> Subscription<Self::Message> {
-        event::listen_with(|event, _| {
+        event::listen_with(|event, _, window| {
-            if let iced::Event::Window(id, window_event) = event {
+            if let iced::Event::Window(window_event) = event {
                 match window_event {
                     window::Event::CloseRequested => {
-                        Some(Message::CloseWindow(id))
+                        Some(Message::CloseWindow(window))
                     }
                     window::Event::Opened { position, .. } => {
-                        Some(Message::WindowOpened(id, position))
+                        Some(Message::WindowOpened(window, position))
+                    }
+                    window::Event::Closed => {
+                        Some(Message::WindowClosed(window))
                     }
-                    window::Event::Closed => Some(Message::WindowClosed(id)),
                     _ => None,
                 }
             } else {

examples/toast/src/main.rs

@@ -499,9 +499,7 @@ mod toast {
             clipboard: &mut dyn Clipboard,
             shell: &mut Shell<'_, Message>,
         ) -> event::Status {
-            if let Event::Window(_, window::Event::RedrawRequested(now)) =
+            if let Event::Window(window::Event::RedrawRequested(now)) = &event {
-                &event
-            {
                 let mut next_redraw: Option<window::RedrawRequest> = None;
 
                 self.instants.iter_mut().enumerate().for_each(

examples/visible_bounds/src/main.rs

@@ -145,11 +145,11 @@ impl Example {
     }
 
     fn subscription(&self) -> Subscription<Message> {
-        event::listen_with(|event, _| match event {
+        event::listen_with(|event, _status, _window| match event {
             Event::Mouse(mouse::Event::CursorMoved { position }) => {
                 Some(Message::MouseMoved(position))
             }
-            Event::Window(_, window::Event::Resized { .. }) => {
+            Event::Window(window::Event::Resized { .. }) => {
                 Some(Message::WindowResized)
             }
             _ => None,

futures/src/event.rs

@@ -9,7 +9,7 @@ use crate::MaybeSend;
 /// This subscription will notify your application of any [`Event`] that was
 /// not captured by any widget.
 pub fn listen() -> Subscription<Event> {
-    listen_with(|event, status| match status {
+    listen_with(|event, status, _window| match status {
         event::Status::Ignored => Some(event),
         event::Status::Captured => None,
     })
@@ -24,7 +24,7 @@ pub fn listen() -> Subscription<Event> {
 /// - Returns `None`, the [`Event`] will be discarded.
 /// - Returns `Some` message, the `Message` will be produced.
 pub fn listen_with<Message>(
-    f: fn(Event, event::Status) -> Option<Message>,
+    f: fn(Event, event::Status, window::Id) -> Option<Message>,
 ) -> Subscription<Message>
 where
     Message: 'static + MaybeSend,
@@ -32,13 +32,12 @@ where
     #[derive(Hash)]
     struct EventsWith;
 
-    subscription::filter_map(
+    subscription::filter_map((EventsWith, f), move |event, status, window| {
-        (EventsWith, f),
+        match event {
-        move |event, status| match event {
+            Event::Window(window::Event::RedrawRequested(_)) => None,
-            Event::Window(_, window::Event::RedrawRequested(_)) => None,
+            _ => f(event, status, window),
-            _ => f(event, status),
+        }
-        },
+    })
-    )
 }
 
 /// Creates a [`Subscription`] that produces a message for every runtime event,
@@ -47,7 +46,7 @@ where
 /// **Warning:** This [`Subscription`], if unfiltered, may produce messages in
 /// an infinite loop.
 pub fn listen_raw<Message>(
-    f: fn(Event, event::Status) -> Option<Message>,
+    f: fn(Event, event::Status, window::Id) -> Option<Message>,
 ) -> Subscription<Message>
 where
     Message: 'static + MaybeSend,

futures/src/keyboard.rs

@@ -18,7 +18,7 @@ where
     #[derive(Hash)]
     struct OnKeyPress;
 
-    subscription::filter_map((OnKeyPress, f), move |event, status| {
+    subscription::filter_map((OnKeyPress, f), move |event, status, _window| {
         match (event, status) {
             (
                 core::Event::Keyboard(Event::KeyPressed {
@@ -45,8 +45,9 @@ where
     #[derive(Hash)]
     struct OnKeyRelease;
 
-    subscription::filter_map((OnKeyRelease, f), move |event, status| {
+    subscription::filter_map(
-        match (event, status) {
+        (OnKeyRelease, f),
+        move |event, status, _window| match (event, status) {
             (
                 core::Event::Keyboard(Event::KeyReleased {
                     key,
@@ -56,6 +57,6 @@ where
                 core::event::Status::Ignored,
             ) => f(key, modifiers),
             _ => None,
-        }
+        },
-    })
+    )
 }

futures/src/runtime.rs

@@ -1,5 +1,6 @@
 //! Run commands and keep track of subscriptions.
 use crate::core::event::{self, Event};
+use crate::core::window;
 use crate::subscription;
 use crate::{BoxFuture, BoxStream, Executor, MaybeSend};
 
@@ -127,7 +128,12 @@ where
     /// See [`Tracker::broadcast`] to learn more.
     ///
     /// [`Tracker::broadcast`]: subscription::Tracker::broadcast
-    pub fn broadcast(&mut self, event: Event, status: event::Status) {
+    pub fn broadcast(
-        self.subscriptions.broadcast(event, status);
+        &mut self,
+        event: Event,
+        status: event::Status,
+        window: window::Id,
+    ) {
+        self.subscriptions.broadcast(event, status, window);
     }
 }

futures/src/subscription.rs

@@ -4,6 +4,7 @@ mod tracker;
 pub use tracker::Tracker;
 
 use crate::core::event::{self, Event};
+use crate::core::window;
 use crate::futures::{Future, Stream};
 use crate::{BoxStream, MaybeSend};
 
@@ -15,7 +16,7 @@ use std::hash::Hash;
 /// A stream of runtime events.
 ///
 /// It is the input of a [`Subscription`].
-pub type EventStream = BoxStream<(Event, event::Status)>;
+pub type EventStream = BoxStream<(Event, event::Status, window::Id)>;
 
 /// The hasher used for identifying subscriptions.
 pub type Hasher = rustc_hash::FxHasher;
@@ -289,7 +290,9 @@ where
 pub(crate) fn filter_map<I, F, Message>(id: I, f: F) -> Subscription<Message>
 where
     I: Hash + 'static,
-    F: Fn(Event, event::Status) -> Option<Message> + MaybeSend + 'static,
+    F: Fn(Event, event::Status, window::Id) -> Option<Message>
+        + MaybeSend
+        + 'static,
     Message: 'static + MaybeSend,
 {
     Subscription::from_recipe(Runner {
@@ -298,8 +301,8 @@ where
             use futures::future;
             use futures::stream::StreamExt;
 
-            events.filter_map(move |(event, status)| {
+            events.filter_map(move |(event, status, window)| {
-                future::ready(f(event, status))
+                future::ready(f(event, status, window))
             })
         },
     })

futures/src/subscription/tracker.rs

@@ -1,4 +1,5 @@
 use crate::core::event::{self, Event};
+use crate::core::window;
 use crate::subscription::{Hasher, Recipe};
 use crate::{BoxFuture, MaybeSend};
 
@@ -23,7 +24,9 @@ pub struct Tracker {
 #[derive(Debug)]
 pub struct Execution {
     _cancel: futures::channel::oneshot::Sender<()>,
-    listener: Option<futures::channel::mpsc::Sender<(Event, event::Status)>>,
+    listener: Option<
+        futures::channel::mpsc::Sender<(Event, event::Status, window::Id)>,
+    >,
 }
 
 impl Tracker {
@@ -139,12 +142,19 @@ impl Tracker {
     /// currently open.
     ///
     /// [`Recipe::stream`]: crate::subscription::Recipe::stream
-    pub fn broadcast(&mut self, event: Event, status: event::Status) {
+    pub fn broadcast(
+        &mut self,
+        event: Event,
+        status: event::Status,
+        window: window::Id,
+    ) {
         self.subscriptions
             .values_mut()
             .filter_map(|connection| connection.listener.as_mut())
             .for_each(|listener| {
-                if let Err(error) = listener.try_send((event.clone(), status)) {
+                if let Err(error) =
+                    listener.try_send((event.clone(), status, window))
+                {
                     log::warn!(
                         "Error sending event to subscription: {error:?}"
                     );

runtime/src/window.rs

@@ -28,8 +28,8 @@ use raw_window_handle::WindowHandle;
 /// In any case, this [`Subscription`] is useful to smoothly draw application-driven
 /// animations without missing any frames.
 pub fn frames() -> Subscription<Instant> {
-    event::listen_raw(|event, _status| match event {
+    event::listen_raw(|event, _status, _window| match event {
-        crate::core::Event::Window(_, Event::RedrawRequested(at)) => Some(at),
+        crate::core::Event::Window(Event::RedrawRequested(at)) => Some(at),
         _ => None,
     })
 }

widget/src/shader.rs

@@ -107,7 +107,7 @@ where
                 Some(Event::Keyboard(keyboard_event))
             }
             core::Event::Touch(touch_event) => Some(Event::Touch(touch_event)),
-            core::Event::Window(_, window::Event::RedrawRequested(instant)) => {
+            core::Event::Window(window::Event::RedrawRequested(instant)) => {
                 Some(Event::RedrawRequested(instant))
             }
             _ => None,

widget/src/text_input.rs

@@ -1003,14 +1003,14 @@ where
 
                 state.keyboard_modifiers = modifiers;
             }
-            Event::Window(_, window::Event::Unfocused) => {
+            Event::Window(window::Event::Unfocused) => {
                 let state = state::<Renderer>(tree);
 
                 if let Some(focus) = &mut state.is_focused {
                     focus.is_window_focused = false;
                 }
             }
-            Event::Window(_, window::Event::Focused) => {
+            Event::Window(window::Event::Focused) => {
                 let state = state::<Renderer>(tree);
 
                 if let Some(focus) = &mut state.is_focused {
@@ -1020,7 +1020,7 @@ where
                     shell.request_redraw(window::RedrawRequest::NextFrame);
                 }
             }
-            Event::Window(_, window::Event::RedrawRequested(now)) => {
+            Event::Window(window::Event::RedrawRequested(now)) => {
                 let state = state::<Renderer>(tree);
 
                 if let Some(focus) = &mut state.is_focused {

winit/src/application.rs

@@ -623,7 +623,6 @@ async fn run_instance<A, E, C>(
                 // Then, we can use the `interface_state` here to decide if a redraw
                 // is needed right away, or simply wait until a specific time.
                 let redraw_event = Event::Window(
-                    window::Id::MAIN,
                     window::Event::RedrawRequested(Instant::now()),
                 );
 
@@ -651,7 +650,11 @@ async fn run_instance<A, E, C>(
                     _ => ControlFlow::Wait,
                 });
 
-                runtime.broadcast(redraw_event, core::event::Status::Ignored);
+                runtime.broadcast(
+                    redraw_event,
+                    core::event::Status::Ignored,
+                    window::Id::MAIN,
+                );
 
                 debug.draw_started();
                 let new_mouse_interaction = user_interface.draw(
@@ -714,7 +717,6 @@ async fn run_instance<A, E, C>(
                 state.update(&window, &window_event, &mut debug);
 
                 if let Some(event) = conversion::window_event(
-                    window::Id::MAIN,
                     window_event,
                     state.scale_factor(),
                     state.modifiers(),
@@ -742,7 +744,7 @@ async fn run_instance<A, E, C>(
                 for (event, status) in
                     events.drain(..).zip(statuses.into_iter())
                 {
-                    runtime.broadcast(event, status);
+                    runtime.broadcast(event, status, window::Id::MAIN);
                 }
 
                 if !messages.is_empty()

winit/src/conversion.rs

@@ -126,7 +126,6 @@ pub fn window_attributes(
 
 /// Converts a winit window event into an iced event.
 pub fn window_event(
-    id: window::Id,
     event: winit::event::WindowEvent,
     scale_factor: f64,
     modifiers: winit::keyboard::ModifiersState,
@@ -137,16 +136,13 @@ pub fn window_event(
         WindowEvent::Resized(new_size) => {
             let logical_size = new_size.to_logical(scale_factor);
 
-            Some(Event::Window(
+            Some(Event::Window(window::Event::Resized {
-                id,
+                width: logical_size.width,
-                window::Event::Resized {
+                height: logical_size.height,
-                    width: logical_size.width,
+            }))
-                    height: logical_size.height,
-                },
-            ))
         }
         WindowEvent::CloseRequested => {
-            Some(Event::Window(id, window::Event::CloseRequested))
+            Some(Event::Window(window::Event::CloseRequested))
         }
         WindowEvent::CursorMoved { position, .. } => {
             let position = position.to_logical::<f64>(scale_factor);
@@ -264,22 +260,19 @@ pub fn window_event(
                 self::modifiers(new_modifiers.state()),
             )))
         }
-        WindowEvent::Focused(focused) => Some(Event::Window(
+        WindowEvent::Focused(focused) => Some(Event::Window(if focused {
-            id,
+            window::Event::Focused
-            if focused {
+        } else {
-                window::Event::Focused
+            window::Event::Unfocused
-            } else {
+        })),
-                window::Event::Unfocused
-            },
-        )),
         WindowEvent::HoveredFile(path) => {
-            Some(Event::Window(id, window::Event::FileHovered(path.clone())))
+            Some(Event::Window(window::Event::FileHovered(path.clone())))
         }
         WindowEvent::DroppedFile(path) => {
-            Some(Event::Window(id, window::Event::FileDropped(path.clone())))
+            Some(Event::Window(window::Event::FileDropped(path.clone())))
         }
         WindowEvent::HoveredFileCancelled => {
-            Some(Event::Window(id, window::Event::FilesHoveredLeft))
+            Some(Event::Window(window::Event::FilesHoveredLeft))
         }
         WindowEvent::Touch(touch) => {
             Some(Event::Touch(touch_event(touch, scale_factor)))
@@ -288,7 +281,7 @@ pub fn window_event(
             let winit::dpi::LogicalPosition { x, y } =
                 position.to_logical(scale_factor);
 
-            Some(Event::Window(id, window::Event::Moved { x, y }))
+            Some(Event::Window(window::Event::Moved { x, y }))
         }
         _ => None,
     }

winit/src/multi_window.rs

@@ -492,13 +492,10 @@ async fn run_instance<A, E, C>(
     let mut events = {
         vec![(
             Some(window::Id::MAIN),
-            core::Event::Window(
+            core::Event::Window(window::Event::Opened {
-                window::Id::MAIN,
+                position: main_window.position(),
-                window::Event::Opened {
+                size: main_window.size(),
-                    position: main_window.position(),
+            }),
-                    size: main_window.size(),
-                },
-            ),
         )]
     };
 
@@ -565,13 +562,10 @@ async fn run_instance<A, E, C>(
 
                 events.push((
                     Some(id),
-                    core::Event::Window(
+                    core::Event::Window(window::Event::Opened {
-                        id,
+                        position: window.position(),
-                        window::Event::Opened {
+                        size: window.size(),
-                            position: window.position(),
+                    }),
-                            size: window.size(),
-                        },
-                    ),
                 ));
             }
             Event::EventLoopAwakened(event) => {
@@ -623,7 +617,6 @@ async fn run_instance<A, E, C>(
                         // Then, we can use the `interface_state` here to decide if a redraw
                         // is needed right away, or simply wait until a specific time.
                         let redraw_event = core::Event::Window(
-                            id,
                             window::Event::RedrawRequested(Instant::now()),
                         );
 
@@ -665,6 +658,7 @@ async fn run_instance<A, E, C>(
                         runtime.broadcast(
                             redraw_event.clone(),
                             core::event::Status::Ignored,
+                            id,
                         );
 
                         let _ = control_sender.start_send(Control::ChangeFlow(
@@ -802,7 +796,7 @@ async fn run_instance<A, E, C>(
 
                             events.push((
                                 None,
-                                core::Event::Window(id, window::Event::Closed),
+                                core::Event::Window(window::Event::Closed),
                             ));
 
                             if window_manager.is_empty() {
@@ -816,7 +810,6 @@ async fn run_instance<A, E, C>(
                             );
 
                             if let Some(event) = conversion::window_event(
-                                id,
                                 window_event,
                                 window.state.scale_factor(),
                                 window.state.modifiers(),
@@ -874,7 +867,7 @@ async fn run_instance<A, E, C>(
                                 .into_iter()
                                 .zip(statuses.into_iter())
                             {
-                                runtime.broadcast(event, status);
+                                runtime.broadcast(event, status, id);
                             }
                         }