Merge branch 'master' into feature/test-recorder

Cargo.lock

@@ -538,6 +538,26 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "bincode"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36eaf5d7b090263e8150820482d5d93cd964a81e4019913c972f4edcc6edb740"
+dependencies = [
+ "bincode_derive",
+ "serde",
+ "unty",
+]
+
+[[package]]
+name = "bincode_derive"
+version = "2.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf95709a440f45e986983918d0e8a1f30a9b1df04918fc828670606804ac3c09"
+dependencies = [
+ "virtue",
+]
+
 [[package]]
 name = "bit-set"
 version = "0.8.0"
@@ -730,6 +750,17 @@ dependencies = [
  "wayland-client",
 ]
 
+[[package]]
+name = "cargo-hot-protocol"
+version = "0.1.0"
+source = "git+https://github.com/hecrj/cargo-hot.git?rev=b8dc518b8640928178a501257e353b73bc06cf47#b8dc518b8640928178a501257e353b73bc06cf47"
+dependencies = [
+ "anyhow",
+ "bincode 2.0.1",
+ "log",
+ "subsecond",
+]
+
 [[package]]
 name = "cast"
 version = "0.3.0"
@@ -2464,7 +2495,7 @@ dependencies = [
 name = "iced_beacon"
 version = "0.14.0-dev"
 dependencies = [
- "bincode",
+ "bincode 1.3.3",
  "futures",
  "iced_core",
  "log",
@@ -2496,6 +2527,7 @@ dependencies = [
 name = "iced_debug"
 version = "0.14.0-dev"
 dependencies = [
+ "cargo-hot-protocol",
  "iced_beacon",
  "iced_core",
  "iced_futures",
@@ -3293,6 +3325,15 @@ version = "2.7.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "78ca9ab1a0babb1e7d5695e3530886289c18cf2f87ec19a575a0abdce112e3a3"
 
+[[package]]
+name = "memfd"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2cffa4ad52c6f791f4f8b15f0c05f9824b2ced1160e88cc393d64fff9a8ac64"
+dependencies = [
+ "rustix 0.38.44",
+]
+
 [[package]]
 name = "memmap2"
 version = "0.9.5"
@@ -5518,6 +5559,34 @@ dependencies = [
  "rayon",
 ]
 
+[[package]]
+name = "subsecond"
+version = "0.7.0-alpha.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43c5b40acd555d02d9a0b5bf4080dbf2cd085d5e2eb2ae7851cb14b9bf5af15c"
+dependencies = [
+ "js-sys",
+ "libc",
+ "libloading",
+ "memfd",
+ "memmap2",
+ "serde",
+ "subsecond-types",
+ "thiserror 2.0.12",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+]
+
+[[package]]
+name = "subsecond-types"
+version = "0.7.0-alpha.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bedadae58a56e137ac970c38c44bff38cee24400fef64c37d5a188a065b1ec1f"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "subtle"
 version = "2.6.1"
@@ -5595,7 +5664,7 @@ version = "5.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "874dcfa363995604333cf947ae9f751ca3af4522c60886774c4963943b4746b1"
 dependencies = [
- "bincode",
+ "bincode 1.3.3",
  "bitflags 1.3.2",
  "flate2",
  "fnv",
@@ -6281,6 +6350,12 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ecb6da28b8a351d773b68d5825ac39017e680750f980f3a1a85cd8dd28a47c1"
 
+[[package]]
+name = "unty"
+version = "0.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d49784317cd0d1ee7ec5c716dd598ec5b4483ea832a2dced265471cc0f690ae"
+
 [[package]]
 name = "url"
 version = "2.5.4"
@@ -6406,6 +6481,12 @@ version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b928f33d975fc6ad9f86c8f283853ad26bdd5b10b7f1542aa2fa15e2289105a"
 
+[[package]]
+name = "virtue"
+version = "0.0.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "051eb1abcf10076295e815102942cc58f9d5e3b4560e46e53c21e8ff6f3af7b1"
+
 [[package]]
 name = "visible_bounds"
 version = "0.1.0"

Cargo.toml

@@ -41,10 +41,12 @@ qr_code = ["iced_widget/qr_code"]
 markdown = ["iced_widget/markdown"]
 # Enables lazy widgets
 lazy = ["iced_widget/lazy"]
-# Enables a debug view in native platforms (press F12)
+# Enables debug metrics in native platforms (press F12)
 debug = ["iced_winit/debug", "iced_devtools"]
 # Enables time-travel debugging (very experimental!)
 time-travel = ["debug", "iced_devtools/time-travel"]
+# Enables hot reloading (very experimental!)
+hot = ["debug", "iced_debug/hot"]
 # Enables the tester developer tool for recording and playing tests (press F12)
 tester = ["debug", "test", "iced_devtools/tester"]
 # Enables testing features (e.g. application presets)
@@ -171,6 +173,7 @@ bincode = "1.3"
 bitflags = "2.0"
 bytemuck = { version = "1.0", features = ["derive"] }
 bytes = "1.6"
+cargo-hot = { package = "cargo-hot-protocol", git = "https://github.com/hecrj/cargo-hot.git", rev = "b8dc518b8640928178a501257e353b73bc06cf47" }
 cosmic-text = "0.14"
 dark-light = "2.0"
 futures = { version = "0.3", default-features = false }

core/src/layout/flex.rs

@@ -137,16 +137,24 @@ where
     //
     // We use the maximum cross length obtained in the first pass as the maximum
     // cross limit.
+    //
+    // We can defer the layout of any elements that have a fixed size in the main axis,
+    // allowing them to use the cross calculations of the next pass.
     if cross_compress && some_fill_cross {
         for (i, (child, tree)) in items.iter().zip(trees.iter_mut()).enumerate()
         {
-            let (fill_main_factor, fill_cross_factor) = {
+            let (main_size, cross_size) = {
                 let size = child.as_widget().size();
 
-                axis.pack(size.width.fill_factor(), size.height.fill_factor())
+                axis.pack(size.width, size.height)
             };
 
-            if fill_main_factor == 0 && fill_cross_factor != 0 {
+            if main_size.fill_factor() == 0 && cross_size.fill_factor() != 0 {
+                if let Length::Fixed(main) = main_size {
+                    available -= main;
+                    continue;
+                }
+
                 let (max_width, max_height) = axis.pack(available, cross);
 
                 let child_limits =
@@ -176,9 +184,9 @@ where
     };
 
     // THIRD PASS
-    // We only have the elements that are fluid in the main axis left.
+    // We lay out the elements that are fluid in the main axis.
     // We use the remaining space to evenly allocate space based on fill factors.
-    for (i, (child, tree)) in items.iter().zip(trees).enumerate() {
+    for (i, (child, tree)) in items.iter().zip(trees.iter_mut()).enumerate() {
         let (fill_main_factor, fill_cross_factor) = {
             let size = child.as_widget().size();
 
@@ -224,10 +232,43 @@ where
         }
     }
 
+    // FOURTH PASS (conditional)
+    // We lay out any elements that were deferred in the second pass.
+    // These are elements that must be compressed in their cross axis and have
+    // a fixed length in the main axis.
+    if cross_compress && some_fill_cross {
+        for (i, (child, tree)) in items.iter().zip(trees).enumerate() {
+            let (main_size, cross_size) = {
+                let size = child.as_widget().size();
+
+                axis.pack(size.width, size.height)
+            };
+
+            if cross_size.fill_factor() != 0 {
+                let Length::Fixed(main) = main_size else {
+                    continue;
+                };
+
+                let (max_width, max_height) = axis.pack(main, cross);
+
+                let child_limits =
+                    Limits::new(Size::ZERO, Size::new(max_width, max_height));
+
+                let layout =
+                    child.as_widget().layout(tree, renderer, &child_limits);
+                let size = layout.size();
+
+                cross = cross.max(axis.cross(size));
+
+                nodes[i] = layout;
+            }
+        }
+    }
+
     let pad = axis.pack(padding.left, padding.top);
     let mut main = pad.0;
 
-    // FOURTH PASS
+    // FIFTH PASS
     // We align all the laid out nodes in the cross axis, if needed.
     for (i, node) in nodes.iter_mut().enumerate() {
         if i > 0 {

core/src/point.rs

@@ -107,3 +107,13 @@ where
         write!(f, "Point {{ x: {}, y: {} }}", self.x, self.y)
     }
 }
+
+impl Point<f32> {
+    /// Snaps the [`Point`] to __unsigned__ integer coordinates.
+    pub fn snap(self) -> Point<u32> {
+        Point {
+            x: self.x.round() as u32,
+            y: self.y.round() as u32,
+        }
+    }
+}

core/src/rectangle.rs

@@ -244,16 +244,19 @@ impl Rectangle<f32> {
 
     /// Snaps the [`Rectangle`] to __unsigned__ integer coordinates.
     pub fn snap(self) -> Option<Rectangle<u32>> {
-        let width = self.width as u32;
+        let top_left = self.position().snap();
-        let height = self.height as u32;
+        let bottom_right = (self.position() + Vector::from(self.size())).snap();
+
+        let width = bottom_right.x.checked_sub(top_left.x)?;
+        let height = bottom_right.y.checked_sub(top_left.y)?;
 
         if width < 1 || height < 1 {
             return None;
         }
 
         Some(Rectangle {
-            x: self.x as u32,
+            x: top_left.x,
-            y: self.y as u32,
+            y: top_left.y,
             width,
             height,
         })

core/src/shell.rs

@@ -32,6 +32,7 @@ impl<'a, Message> Shell<'a, Message> {
     }
 
     /// Returns true if the [`Shell`] contains no published messages
+    #[must_use]
     pub fn is_empty(&self) -> bool {
         self.messages.is_empty()
     }
@@ -50,11 +51,13 @@ impl<'a, Message> Shell<'a, Message> {
     }
 
     /// Returns the current [`event::Status`] of the [`Shell`].
+    #[must_use]
     pub fn event_status(&self) -> event::Status {
         self.event_status
     }
 
     /// Returns whether the current event has been captured.
+    #[must_use]
     pub fn is_event_captured(&self) -> bool {
         self.event_status == event::Status::Captured
     }
@@ -73,6 +76,7 @@ impl<'a, Message> Shell<'a, Message> {
     }
 
     /// Returns the request a redraw should happen, if any.
+    #[must_use]
     pub fn redraw_request(&self) -> window::RedrawRequest {
         self.redraw_request
     }
@@ -101,16 +105,19 @@ impl<'a, Message> Shell<'a, Message> {
     }
 
     /// Returns the current [`InputMethod`] strategy.
+    #[must_use]
     pub fn input_method(&self) -> &InputMethod {
         &self.input_method
     }
 
     /// Returns the current [`InputMethod`] strategy.
+    #[must_use]
     pub fn input_method_mut(&mut self) -> &mut InputMethod {
         &mut self.input_method
     }
 
     /// Returns whether the current layout is invalid or not.
+    #[must_use]
     pub fn is_layout_invalid(&self) -> bool {
         self.is_layout_invalid
     }
@@ -134,6 +141,7 @@ impl<'a, Message> Shell<'a, Message> {
 
     /// Returns whether the widgets of the current application have been
     /// invalidated.
+    #[must_use]
     pub fn are_widgets_invalid(&self) -> bool {
         self.are_widgets_invalid
     }

core/src/window/position.rs

@@ -1,7 +1,7 @@
 use crate::{Point, Size};
 
 /// The position of a window in a given screen.
-#[derive(Debug, Clone, Copy, PartialEq)]
+#[derive(Debug, Clone, Copy)]
 pub enum Position {
     /// The platform-specific default position for a new window.
     Default,

debug/Cargo.toml

@@ -12,6 +12,7 @@ keywords.workspace = true
 
 [features]
 enable = ["dep:iced_beacon"]
+hot = ["enable", "dep:cargo-hot"]
 
 [dependencies]
 iced_core.workspace = true
@@ -21,3 +22,6 @@ log.workspace = true
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 iced_beacon.workspace = true
 iced_beacon.optional = true
+
+cargo-hot.workspace = true
+cargo-hot.optional = true

debug/src/lib.rs

@@ -39,6 +39,7 @@ pub fn disable() {
 
 pub fn init(metadata: Metadata) {
     internal::init(metadata);
+    hot::init();
 }
 
 pub fn quit() -> bool {
@@ -113,6 +114,18 @@ pub fn commands() -> Subscription<Command> {
     internal::commands()
 }
 
+pub fn hot<O>(f: impl FnOnce() -> O) -> O {
+    hot::call(f)
+}
+
+pub fn on_hotpatch(f: impl Fn() + Send + Sync + 'static) {
+    hot::on_hotpatch(f)
+}
+
+pub fn is_stale() -> bool {
+    hot::is_stale()
+}
+
 #[cfg(all(feature = "enable", not(target_arch = "wasm32")))]
 mod internal {
     use crate::core::theme;
@@ -399,3 +412,83 @@ mod internal {
         pub fn finish(self) {}
     }
 }
+
+#[cfg(feature = "hot")]
+mod hot {
+    use std::collections::BTreeSet;
+    use std::sync::atomic::{self, AtomicBool};
+    use std::sync::{Arc, Mutex, OnceLock};
+
+    static IS_STALE: AtomicBool = AtomicBool::new(false);
+
+    static HOT_FUNCTIONS_PENDING: Mutex<BTreeSet<u64>> =
+        Mutex::new(BTreeSet::new());
+
+    static HOT_FUNCTIONS: OnceLock<BTreeSet<u64>> = OnceLock::new();
+
+    pub fn init() {
+        cargo_hot::connect();
+
+        cargo_hot::subsecond::register_handler(Arc::new(|| {
+            if HOT_FUNCTIONS.get().is_none() {
+                HOT_FUNCTIONS
+                    .set(std::mem::take(
+                        &mut HOT_FUNCTIONS_PENDING
+                            .lock()
+                            .expect("Lock hot functions"),
+                    ))
+                    .expect("Set hot functions");
+            }
+
+            IS_STALE.store(false, atomic::Ordering::Relaxed);
+        }));
+    }
+
+    pub fn call<O>(f: impl FnOnce() -> O) -> O {
+        let mut f = Some(f);
+
+        // The `move` here is important. Hotpatching will not work
+        // otherwise.
+        let mut f = cargo_hot::subsecond::HotFn::current(move || {
+            f.take().expect("Hot function is stale")()
+        });
+
+        let address = f.ptr_address().0;
+
+        if let Some(hot_functions) = HOT_FUNCTIONS.get() {
+            if hot_functions.contains(&address) {
+                IS_STALE.store(true, atomic::Ordering::Relaxed);
+            }
+        } else {
+            let _ = HOT_FUNCTIONS_PENDING
+                .lock()
+                .expect("Lock hot functions")
+                .insert(address);
+        }
+
+        f.call(())
+    }
+
+    pub fn on_hotpatch(f: impl Fn() + Send + Sync + 'static) {
+        cargo_hot::subsecond::register_handler(Arc::new(f));
+    }
+
+    pub fn is_stale() -> bool {
+        IS_STALE.load(atomic::Ordering::Relaxed)
+    }
+}
+
+#[cfg(not(feature = "hot"))]
+mod hot {
+    pub fn init() {}
+
+    pub fn call<O>(f: impl FnOnce() -> O) -> O {
+        f()
+    }
+
+    pub fn on_hotpatch(_f: impl Fn() + Send + Sync + 'static) {}
+
+    pub fn is_stale() -> bool {
+        false
+    }
+}

devtools/src/lib.rs

@@ -397,13 +397,16 @@ where
         }
         .map(|mode| Element::from(mode).map(Event::Message));
 
-        let notification = self.show_notification.then(|| {
+        let notification = self
-            bottom_right(opaque(
+            .show_notification
-                container(text("Press F12 to open developer tools"))
+            .then(|| text("Press F12 to open debug metrics"))
-                    .padding(10)
+            .or_else(|| {
-                    .style(container::dark),
+                debug::is_stale().then(|| {
-            ))
+                    text(
-        });
+                        "Types have changed. Restart to re-enable hotpatching.",
+                    )
+                })
+            });
 
         let sidebar = if let Mode::Open { tester } = &self.mode {
             let title = monospace("Developer Tools");
@@ -429,7 +432,13 @@ where
             stack![content]
                 .height(Fill)
                 .push_maybe(setup.map(opaque))
-                .push_maybe(notification),
+                .push_maybe(notification.map(|notification| {
+                    bottom_right(opaque(
+                        container(notification)
+                            .padding(10)
+                            .style(container::dark),
+                    ))
+                })),
         )
         .into()
     }

examples/arc/src/main.rs

@@ -36,7 +36,7 @@ impl Arc {
         self.cache.clear();
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         Canvas::new(self).width(Fill).height(Fill).into()
     }
 

examples/bezier_tool/src/main.rs

@@ -34,7 +34,7 @@ impl Example {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         container(hover(
             self.bezier.view(&self.curves).map(Message::AddCurve),
             if self.curves.is_empty() {

examples/changelog/src/main.rs

@@ -217,7 +217,7 @@ impl Generator {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         match self {
             Self::Loading => center("Loading...").into(),
             Self::Done => center(

examples/checkbox/src/main.rs

@@ -38,7 +38,7 @@ impl Example {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let default_checkbox = checkbox("Default", self.default)
             .on_toggle(Message::DefaultToggled);
 

examples/clock/src/main.rs

@@ -48,7 +48,7 @@ impl Clock {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let canvas = canvas(self as &Self).width(Fill).height(Fill);
 
         container(canvas).padding(20).into()
@@ -166,7 +166,7 @@ impl<Message> canvas::Program<Message> for Clock {
                 let y = radius * angle.0.sin();
 
                 frame.fill_text(canvas::Text {
-                    content: format!("{}", hour),
+                    content: format!("{hour}"),
                     size: (radius / 5.0).into(),
                     position: Point::new(x * 0.82, y * 0.82),
                     color: palette.secondary.strong.text,

examples/color_palette/src/main.rs

@@ -56,7 +56,7 @@ impl ColorPalette {
         self.theme = Theme::new(to_color(srgb));
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let base = self.theme.base;
 
         let srgb = to_rgb(base);
@@ -149,7 +149,7 @@ impl Theme {
             .chain(self.higher.iter())
     }
 
-    pub fn view(&self) -> Element<Message> {
+    pub fn view(&self) -> Element<'_, Message> {
         Canvas::new(self).width(Fill).height(Fill).into()
     }
 
@@ -296,7 +296,7 @@ trait ColorSpace: Sized {
 }
 
 impl<C: ColorSpace + Copy> ColorPicker<C> {
-    fn view(&self, color: C) -> Element<C> {
+    fn view(&self, color: C) -> Element<'_, C> {
         let [c1, c2, c3] = color.components();
         let [cr1, cr2, cr3] = C::COMPONENT_RANGES;
 

examples/combo_box/src/main.rs

@@ -47,7 +47,7 @@ impl Example {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let combo_box = combo_box(
             &self.languages,
             "Type a language...",

examples/counter/src/main.rs

@@ -28,7 +28,7 @@ impl Counter {
         }
     }
 
-    fn view(&self) -> Column<Message> {
+    fn view(&self) -> Column<'_, Message> {
         column![
             button("Increment").on_press(Message::Increment),
             text(self.value).size(50),

examples/custom_quad/src/main.rs

@@ -74,7 +74,7 @@ impl Example {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let border::Radius {
             top_left,
             top_right,

examples/custom_widget/src/main.rs

@@ -103,7 +103,7 @@ impl Example {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let content = column![
             circle(self.radius),
             text!("Radius: {:.2}", self.radius),

examples/download_progress/src/main.rs

@@ -61,7 +61,7 @@ impl Example {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let downloads =
             Column::with_children(self.downloads.iter().map(Download::view))
                 .push(
@@ -152,7 +152,7 @@ impl Download {
         }
     }
 
-    pub fn view(&self) -> Element<Message> {
+    pub fn view(&self) -> Element<'_, Message> {
         let current_progress = match &self.state {
             State::Idle => 0.0,
             State::Downloading { progress, .. } => *progress,

examples/editor/src/main.rs

@@ -144,7 +144,7 @@ impl Editor {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let controls = row![
             action(new_icon(), "New file", Some(Message::NewFile)),
             action(

examples/events/src/main.rs

@@ -55,7 +55,7 @@ impl Events {
         event::listen().map(Message::EventOccurred)
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let events = Column::with_children(
             self.last
                 .iter()

examples/exit/src/main.rs

@@ -29,7 +29,7 @@ impl Exit {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let content = if self.show_confirm {
             column![
                 "Are you sure you want to exit?",

examples/ferris/src/main.rs

@@ -91,7 +91,7 @@ impl Image {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let i_am_ferris = column![
             "Hello!",
             Element::from(

examples/game_of_life/src/main.rs

@@ -111,7 +111,7 @@ impl GameOfLife {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let version = self.version;
         let selected_speed = self.next_speed.unwrap_or(self.speed);
         let controls = view_controls(
@@ -320,7 +320,7 @@ mod grid {
             }
         }
 
-        pub fn view(&self) -> Element<Message> {
+        pub fn view(&self) -> Element<'_, Message> {
             Canvas::new(self).width(Fill).height(Fill).into()
         }
 

examples/gradient/src/main.rs

@@ -51,7 +51,7 @@ impl Gradient {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let Self {
             start,
             end,

examples/integration/src/controls.rs

@@ -38,7 +38,7 @@ impl Controls {
         }
     }
 
-    pub fn view(&self) -> Element<Message, Theme, Renderer> {
+    pub fn view(&self) -> Element<'_, Message, Theme, Renderer> {
         let background_color = self.background_color;
 
         let sliders = row![

examples/layout/src/main.rs

@@ -68,7 +68,7 @@ impl Layout {
         })
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let header = row![
             text(self.example.title).size(20).font(Font::MONOSPACE),
             horizontal_space(),
@@ -121,7 +121,7 @@ impl Layout {
     }
 }
 
-#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[derive(Debug, Clone, Copy, Eq)]
 struct Example {
     title: &'static str,
     view: fn() -> Element<'static, Message>,
@@ -190,7 +190,7 @@ impl Example {
         Self::LIST.get(index + 1).copied().unwrap_or(self)
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         (self.view)()
     }
 }
@@ -201,6 +201,12 @@ impl Default for Example {
     }
 }
 
+impl PartialEq for Example {
+    fn eq(&self, other: &Self) -> bool {
+        self.title == other.title
+    }
+}
+
 fn centered<'a>() -> Element<'a, Message> {
     center(text("I am centered!").size(50)).into()
 }

examples/lazy/src/main.rs

@@ -154,7 +154,7 @@ impl App {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let options = lazy(self.version, |_| {
             let mut items: Vec<_> = self.items.iter().cloned().collect();
 

examples/loading_spinners/src/main.rs

@@ -37,7 +37,7 @@ impl LoadingSpinners {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let column = [
             &easing::EMPHASIZED,
             &easing::EMPHASIZED_DECELERATE,

examples/loupe/src/main.rs

@@ -30,7 +30,7 @@ impl Loupe {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         center(loupe(
             3.0,
             column![

examples/markdown/overview.md

@@ -34,7 +34,7 @@ Now, let's show the actual counter by putting it all together in our __view logi
 use iced::widget::{button, column, text, Column};
 
 impl Counter {
-    pub fn view(&self) -> Column<Message> {
+    pub fn view(&self) -> Column<'_, Message> {
         // We use a column: a simple vertical layout
         column![
             // The increment button. We tell it to produce an

examples/markdown/src/main.rs

@@ -174,7 +174,7 @@ impl Markdown {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let editor = text_editor(&self.raw)
             .placeholder("Type your Markdown here...")
             .on_action(Message::Edit)

examples/modal/src/main.rs

@@ -92,7 +92,7 @@ impl App {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let content = container(
             column![
                 row![text("Top Left"), horizontal_space(), text("Top Right")]

examples/multi_window/src/main.rs

@@ -130,7 +130,7 @@ impl Example {
         }
     }
 
-    fn view(&self, window_id: window::Id) -> Element<Message> {
+    fn view(&self, window_id: window::Id) -> Element<'_, Message> {
         if let Some(window) = self.windows.get(&window_id) {
             center(window.view(window_id)).into()
         } else {
@@ -161,14 +161,14 @@ impl Example {
 impl Window {
     fn new(count: usize) -> Self {
         Self {
-            title: format!("Window_{}", count),
+            title: format!("Window_{count}"),
             scale_input: "1.0".to_string(),
             current_scale: 1.0,
             theme: Theme::ALL[count % Theme::ALL.len()].clone(),
         }
     }
 
-    fn view(&self, id: window::Id) -> Element<Message> {
+    fn view(&self, id: window::Id) -> Element<'_, Message> {
         let scale_input = column![
             text("Window scale factor:"),
             text_input("Window Scale", &self.scale_input)

examples/multitouch/src/main.rs

@@ -43,7 +43,7 @@ impl Multitouch {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         Canvas::new(self).width(Fill).height(Fill).into()
     }
 }

examples/pane_grid/src/main.rs

@@ -129,7 +129,7 @@ impl Example {
         })
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let focus = self.focus;
         let total_panes = self.panes.len();
 

examples/pick_list/src/main.rs

@@ -24,7 +24,7 @@ impl Example {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let pick_list = pick_list(
             &Language::ALL[..],
             self.selected_language,

examples/pokedex/src/main.rs

@@ -63,7 +63,7 @@ impl Pokedex {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let content: Element<_> = match self {
             Pokedex::Loading => {
                 text("Searching for Pokémon...").size(40).into()
@@ -100,7 +100,7 @@ struct Pokemon {
 impl Pokemon {
     const TOTAL: u16 = 807;
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         row![
             image::viewer(self.image.clone()),
             column![

examples/progress_bar/src/main.rs

@@ -30,7 +30,7 @@ impl Progress {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let bar = progress_bar(0.0..=100.0, self.value);
 
         column![

examples/qr_code/src/main.rs

@@ -63,7 +63,7 @@ impl QRGenerator {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let title = text("QR Code Generator").size(70);
 
         let input =

examples/screenshot/src/main.rs

@@ -174,7 +174,7 @@ impl Example {
                     |png_result| match png_result {
                         Ok(path) => format!("Png saved as: {path:?}!"),
                         Err(PngError(error)) => {
-                            format!("Png could not be saved due to:\n{}", error)
+                            format!("Png could not be saved due to:\n{error}")
                         }
                     },
                 );

examples/scrollable/src/main.rs

@@ -118,7 +118,7 @@ impl ScrollableDemo {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let scrollbar_width_slider = slider(
             0..=15,
             self.scrollbar_width,

examples/sierpinski_triangle/src/main.rs

@@ -1,7 +1,9 @@
 use iced::mouse;
 use iced::widget::canvas::{self, Canvas, Event, Geometry};
 use iced::widget::{column, row, slider, text};
-use iced::{Center, Color, Fill, Point, Rectangle, Renderer, Size, Theme};
+use iced::{
+    Center, Color, Element, Fill, Point, Rectangle, Renderer, Size, Theme,
+};
 
 use rand::Rng;
 use std::fmt::Debug;
@@ -46,7 +48,7 @@ impl SierpinskiEmulator {
         self.graph.redraw();
     }
 
-    fn view(&self) -> iced::Element<'_, Message> {
+    fn view(&self) -> Element<'_, Message> {
         column![
             Canvas::new(&self.graph).width(Fill).height(Fill),
             row![

examples/slider/src/main.rs

@@ -27,7 +27,7 @@ impl Slider {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let h_slider = container(
             slider(1..=100, self.value, Message::SliderChanged)
                 .default(50)

examples/solar_system/src/main.rs

@@ -55,7 +55,7 @@ impl SolarSystem {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         canvas(&self.state).width(Fill).height(Fill).into()
     }
 

examples/stopwatch/src/main.rs

@@ -83,7 +83,7 @@ impl Stopwatch {
         Subscription::batch(vec![tick, keyboard::on_key_press(handle_hotkey)])
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         const MINUTE: u64 = 60;
         const HOUR: u64 = 60 * MINUTE;
 

examples/styling/snapshots/catppuccin_frappé-tiny-skia.sha256

@@ -1 +1 @@
-12ba47a34ed415825a23f8ef377a2d52950d2f8614a66bf46c0ec28d0cf15c85
+30570747bb062e9f7730cdd58be961c84bcf4711a6983185bff6d903e8d29e9c

examples/styling/snapshots/catppuccin_latte-tiny-skia.sha256

@@ -1 +1 @@
-78d3afadbdca4a992c662541d602850e0dec0abafa585e2a3078daa1be5998b8
+d5a086a08544f98087189bd4ece8815e5290722a07cd580b933f1bf77a040c52

examples/styling/snapshots/catppuccin_macchiato-tiny-skia.sha256

@@ -1 +1 @@
-4e594cfec775d51f7f836646c59bf4a2de07252721d66ddddea69c17e9112bae
+30e523961db89a3ee97ad1eac09e727ecb3dec485faa362534a9f5ad083b32dd

examples/styling/snapshots/catppuccin_mocha-tiny-skia.sha256

@@ -1 +1 @@
-2ab665b51387c61086ae0199c29e291105bfe4583bd4c4daa652e30917f10bd6
+bce5427d5105f68e1d7fa18a34fcc551cb78c2fefd9a583ba44686331133436d

examples/styling/snapshots/dark-tiny-skia.sha256

@@ -1 +1 @@
-61c9ee377b33ffa800f512877e45ad5f41fbac36f5d3f06d1b62d6af6ee9d7b2
+c8a7edbd5a8bbf559134b84253e14e65340f4ffe3e22c272b21c8438e47ffaf7

examples/styling/snapshots/dracula-tiny-skia.sha256

@@ -1 +1 @@
-75f2fb12c9090a256708515de01a25e78905f71e134b7cda79f4fe44b2434052
+63d646b22d3dffbb56dac2e3f345090bd26625a388dd6cc142359f2a7ac9c8df

examples/styling/snapshots/ferra-tiny-skia.sha256

@@ -1 +1 @@
-b4a1b42d2e21b2a493605745e6beb8e1f28cbeb01b73336e1e8d9061249a8311
+d26f55674cbd96bc3b534ffdd098a13199718ef9c5ffe8ece0882ddab714b776

examples/styling/snapshots/gruvbox_dark-tiny-skia.sha256

@@ -1 +1 @@
-eb52921b3ee23e1814268701c935d0dff387e7eb741c50443f75a7ab902b5e44
+482c44c13d4ff3de19e71f3dddf93bbee170e54e2d353e818811069de28e18ed

examples/styling/snapshots/gruvbox_light-tiny-skia.sha256

@@ -1 +1 @@
-bf6c4cbd6eeed0167d28509e37292f5ce26ed1d58bb156bedb861d0619a1945b
+6738cc4fc6eb8a5d406c613a4b0f08c0e8dcd2c1a5444445eebd3888f9303841

examples/styling/snapshots/kanagawa_dragon-tiny-skia.sha256

@@ -1 +1 @@
-83726a4175900a9ef159b80925f2fa985b4ea87bff78d8bb01918fb6c40d6175
+0a918c52538fc4848aa0c68d8f2d6f4c981ed68971dd9c725f0093a39ef7f353

examples/styling/snapshots/kanagawa_lotus-tiny-skia.sha256

@@ -1 +1 @@
-54c8d44afbdd644f324cf40e744b3d7871263e44de2d9a91f6c10470c38ac3c6
+de3e1a2c21e1a86d76ca99989c73e8a2596ef627bba95d246fab8f02d56bd0af

examples/styling/snapshots/kanagawa_wave-tiny-skia.sha256

@@ -1 +1 @@
-5713843396e2efcfc7cc8abd00343d5d66ce8b8a195212a9b75dbfeec8edf7a7
+3418ea4eb0f7786607ef02e7db4bc97309530f2f7c08f8aea15c768a13a09ca4

examples/styling/snapshots/light-tiny-skia.sha256

@@ -1 +1 @@
-f1b20ab79f8242776d9eb1ad9cff7090435aa416811c48a7c22c69b09cd8e70f
+c8474e02a9df23f123816a489c1ea7ae6cb994a0eca429592dfe6d933de1beee

examples/styling/snapshots/moonfly-tiny-skia.sha256

@@ -1 +1 @@
-2c4be9dc1340b65cad6d15d5318017412eba1247a016379b83db379dde0214af
+02095fd09c078be02dc41e29e55de25e8a79e6ad4293aa7e430257a9016dfb3d

examples/styling/snapshots/nightfly-tiny-skia.sha256

@@ -1 +1 @@
-2d5d6b9613ccb6a2f23142baf704288037808e7a60ee05bdc73490d8c8780064
+d82588a2aba3e7211f25b85ebb812a42dfa59137dd4b59d26f5f60d5b28e537f

examples/styling/snapshots/nord-tiny-skia.sha256

@@ -1 +1 @@
-512b8dfd4687a609d202436e75ecf1a5553acc2157000e77e31c1578941b033c
+d6b73545929cc7794c1a918f069b5326ef129bed8f9ad2cd001be7d078a2b6a0

examples/styling/snapshots/oxocarbon-tiny-skia.sha256

@@ -1 +1 @@
-4b3b7a2dc65307a3551227f1c5d2bb49da15d29e320ccaa160e3d9fca44c1037
+0ec7251c69755becd678b7aec398a275edf31cc077960723cd6b9364e8678548

examples/styling/snapshots/solarized_dark-tiny-skia.sha256

@@ -1 +1 @@
-be1f056f0decaee8c138cd038e3e34352f02448b77c1e251796a8f0be8086913
+4a15c475d45cf8eb0ccd6727cf6e493bd8c22454610b167a632a2328308faed1

examples/styling/snapshots/solarized_light-tiny-skia.sha256

@@ -1 +1 @@
-31a7a46ed7951d69e1a29ab595d241e689cacdf66cea53dda6609db4927070e5
+49a41af93e89aab0a4e352e9cedfba3c6e18caf4267955c9d362bad40264a165

examples/styling/snapshots/tokyo_night-tiny-skia.sha256

@@ -1 +1 @@
-5eab001ed1aeeea3f24fe18e4aab9b8522cb35ac1328d7ca3532dbdfdf95780f
+8fcd80d4569dafdac4b4452b8ca8ab0cdceeb755f3c83d374ccd5ed4d0e8d43d

examples/styling/snapshots/tokyo_night_light-tiny-skia.sha256

@@ -1 +1 @@
-2fed695daa4c3da56f744832a041060704310a97d65820c97d556d297dfb271a
+c37a32784c769c046f3aa881914b121af373b8c6e175ced89304d15b626a653a

examples/styling/snapshots/tokyo_night_storm-tiny-skia.sha256

@@ -1 +1 @@
-0ecd51994f6eb37f111dc1b21cad72bb705499eb83156e9dc3ae2221ec392a42
+533d25575e8bf1111036fb082b424d0d0e60947a7da8428ab8c71e0bda01469e

examples/styling/src/main.rs

@@ -65,7 +65,7 @@ impl Styling {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let choose_theme = column![
             text("Theme:"),
             pick_list(Theme::ALL, Some(&self.theme), Message::ThemeChanged)
@@ -126,7 +126,7 @@ impl Styling {
 
         let content = column![
             choose_theme,
-            horizontal_rule(38),
+            horizontal_rule(1),
             text_input,
             row![primary, success, warning, danger]
                 .spacing(10)
@@ -135,8 +135,8 @@ impl Styling {
             progress_bar(),
             row![
                 scrollable,
-                vertical_rule(38),
+                row![vertical_rule(1), column![checkbox, toggler].spacing(20)]
-                column![checkbox, toggler].spacing(20)
+                    .spacing(20)
             ]
             .spacing(10)
             .height(100)

examples/svg/src/main.rs

@@ -24,7 +24,7 @@ impl Tiger {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let handle = svg::Handle::from_path(format!(
             "{}/resources/tiger.svg",
             env!("CARGO_MANIFEST_DIR")

examples/system_information/src/main.rs

@@ -47,7 +47,7 @@ impl Example {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         use bytesize::ByteSize;
 
         let content: Element<_> = match self {

examples/the_matrix/src/main.rs

@@ -34,7 +34,7 @@ impl TheMatrix {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         canvas(self).width(Fill).height(Fill).into()
     }
 

examples/toast/src/main.rs

@@ -613,12 +613,11 @@ mod toast {
                             &self.viewport,
                             renderer,
                         )
-                        .max(
+                        .max(if cursor.is_over(layout.bounds()) {
-                            cursor
+                            mouse::Interaction::Idle
-                                .is_over(layout.bounds())
+                        } else {
-                                .then_some(mouse::Interaction::Idle)
+                            Default::default()
-                                .unwrap_or_default(),
+                        })
-                        )
                 })
                 .max()
                 .unwrap_or_default()

examples/todos/src/main.rs

@@ -186,7 +186,7 @@ impl Todos {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         match self {
             Todos::Loading => loading_message(),
             Todos::Loaded(State {
@@ -338,7 +338,7 @@ impl Task {
         }
     }
 
-    fn view(&self, i: usize) -> Element<TaskMessage> {
+    fn view(&self, i: usize) -> Element<'_, TaskMessage> {
         match &self.state {
             TaskState::Idle => {
                 let checkbox = checkbox(&self.description, self.completed)
@@ -385,7 +385,10 @@ impl Task {
     }
 }
 
-fn view_controls(tasks: &[Task], current_filter: Filter) -> Element<Message> {
+fn view_controls(
+    tasks: &[Task],
+    current_filter: Filter,
+) -> Element<'_, Message> {
     let tasks_left = tasks.iter().filter(|task| !task.completed).count();
 
     let filter_button = |label, filter, current_filter| {
@@ -617,7 +620,7 @@ mod tests {
     use iced_test::selector::id;
     use iced_test::{Error, Simulator};
 
-    fn simulator(todos: &Todos) -> Simulator<Message> {
+    fn simulator(todos: &Todos) -> Simulator<'_, Message> {
         Simulator::with_settings(
             Settings {
                 fonts: vec![Todos::ICON_FONT.into()],

examples/tooltip/src/main.rs

@@ -33,7 +33,7 @@ impl Tooltip {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let tooltip = tooltip(
             button("Press to change position")
                 .on_press(Message::ChangePosition),

examples/tour/src/main.rs

@@ -76,7 +76,7 @@ impl Tour {
             Screen::End => "End",
         };
 
-        format!("{} - Iced", screen)
+        format!("{screen} - Iced")
     }
 
     fn update(&mut self, event: Message) {
@@ -141,7 +141,7 @@ impl Tour {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let controls =
             row![]
                 .push_maybe(self.screen.previous().is_some().then(|| {
@@ -197,7 +197,7 @@ impl Tour {
         }
     }
 
-    fn welcome(&self) -> Column<Message> {
+    fn welcome(&self) -> Column<'_, Message> {
         Self::container("Welcome!")
             .push(
                 "This is a simple tour meant to showcase a bunch of \
@@ -244,7 +244,7 @@ impl Tour {
             )
     }
 
-    fn slider(&self) -> Column<Message> {
+    fn slider(&self) -> Column<'_, Message> {
         Self::container("Slider")
             .push(
                 "A slider allows you to smoothly select a value from a range \
@@ -258,7 +258,7 @@ impl Tour {
             .push(text(self.slider.to_string()).width(Fill).align_x(Center))
     }
 
-    fn rows_and_columns(&self) -> Column<Message> {
+    fn rows_and_columns(&self) -> Column<'_, Message> {
         let row_radio = radio(
             "Row",
             Layout::Row,
@@ -303,7 +303,7 @@ impl Tour {
             .push(spacing_section)
     }
 
-    fn text(&self) -> Column<Message> {
+    fn text(&self) -> Column<'_, Message> {
         let size = self.text_size;
         let color = self.text_color;
 
@@ -339,7 +339,7 @@ impl Tour {
             .push(color_section)
     }
 
-    fn radio(&self) -> Column<Message> {
+    fn radio(&self) -> Column<'_, Message> {
         let question = column![
             text("Iced is written in...").size(24),
             column(
@@ -374,7 +374,7 @@ impl Tour {
             )
     }
 
-    fn toggler(&self) -> Column<Message> {
+    fn toggler(&self) -> Column<'_, Message> {
         Self::container("Toggler")
             .push("A toggler is mostly used to enable or disable something.")
             .push(
@@ -387,7 +387,7 @@ impl Tour {
             )
     }
 
-    fn image(&self) -> Column<Message> {
+    fn image(&self) -> Column<'_, Message> {
         let width = self.image_width;
         let filter_method = self.image_filter_method;
 
@@ -406,7 +406,7 @@ impl Tour {
             .align_x(Center)
     }
 
-    fn scrollable(&self) -> Column<Message> {
+    fn scrollable(&self) -> Column<'_, Message> {
         Self::container("Scrollable")
             .push(
                 "Iced supports scrollable content. Try it out! Find the \
@@ -428,7 +428,7 @@ impl Tour {
             .push(text("You made it!").width(Fill).size(50).align_x(Center))
     }
 
-    fn text_input(&self) -> Column<Message> {
+    fn text_input(&self) -> Column<'_, Message> {
         let value = &self.input_value;
         let is_secure = self.input_is_secure;
         let is_showing_icon = self.input_is_showing_icon;
@@ -474,7 +474,7 @@ impl Tour {
             )
     }
 
-    fn debugger(&self) -> Column<Message> {
+    fn debugger(&self) -> Column<'_, Message> {
         Self::container("Debugger")
             .push(
                 "You can ask Iced to visually explain the layouting of the \
@@ -491,7 +491,7 @@ impl Tour {
             .push("Feel free to go back and take a look.")
     }
 
-    fn end(&self) -> Column<Message> {
+    fn end(&self) -> Column<'_, Message> {
         Self::container("You reached the end!")
             .push("This tour will be updated as more features are added.")
             .push("Make sure to keep an eye on it!")

examples/url_handler/src/main.rs

@@ -31,7 +31,7 @@ impl App {
         event::listen_url().map(Message::UrlReceived)
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let content = match &self.url {
             Some(url) => text(url),
             None => text("No URL received yet!"),

examples/vectorial_text/src/main.rs

@@ -48,7 +48,7 @@ impl VectorialText {
         self.state.cache.clear();
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let slider_with_label = |label, range, value, message: fn(f32) -> _| {
             column![
                 row![text(label), horizontal_space(), text!("{:.2}", value)],

examples/visible_bounds/src/main.rs

@@ -59,7 +59,7 @@ impl Example {
         }
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let data_row = |label, value, color| {
             row![
                 text(label),

examples/websocket/src/main.rs

@@ -93,7 +93,7 @@ impl WebSocket {
         ])
     }
 
-    fn view(&self) -> Element<Message> {
+    fn view(&self) -> Element<'_, Message> {
         let message_log: Element<_> = if self.messages.is_empty() {
             center(
                 text("Your messages will appear here...")

runtime/src/lib.rs

@@ -56,6 +56,9 @@ pub enum Action<T> {
     /// Run a system action.
     System(system::Action),
 
+    /// Recreate all user interfaces and redraw all windows.
+    Reload,
+
     /// Exits the runtime.
     ///
     /// This will normally close any application windows and
@@ -79,6 +82,7 @@ impl<T> Action<T> {
             Action::Clipboard(action) => Err(Action::Clipboard(action)),
             Action::Window(action) => Err(Action::Window(action)),
             Action::System(action) => Err(Action::System(action)),
+            Action::Reload => Err(Action::Reload),
             Action::Exit => Err(Action::Exit),
         }
     }
@@ -102,6 +106,7 @@ where
             }
             Action::Window(_) => write!(f, "Action::Window"),
             Action::System(action) => write!(f, "Action::System({action:?})"),
+            Action::Reload => write!(f, "Action::Reload"),
             Action::Exit => write!(f, "Action::Exit"),
         }
     }

runtime/src/task.rs

@@ -17,7 +17,6 @@ pub use sipper::{Never, Sender, Sipper, Straw, sipper, stream};
 /// A set of concurrent actions to be performed by the iced runtime.
 ///
 /// A [`Task`] _may_ produce a bunch of values of type `T`.
-#[allow(missing_debug_implementations)]
 #[must_use = "`Task` must be returned to the runtime to take effect; normally in your `update` or `new` functions."]
 pub struct Task<T> {
     stream: Option<BoxStream<Action<T>>>,
@@ -278,6 +277,14 @@ impl<T> Task<T> {
     }
 }
 
+impl<T> std::fmt::Debug for Task<T> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct(&format!("Task<{}>", std::any::type_name::<T>()))
+            .field("units", &self.units)
+            .finish()
+    }
+}
+
 /// A handle to a [`Task`] that can be used for aborting it.
 #[derive(Debug, Clone)]
 pub struct Handle {

src/application.rs

@@ -38,6 +38,8 @@ use crate::{
     Element, Executor, Font, Result, Settings, Size, Subscription, Task,
 };
 
+use iced_debug as debug;
+
 use std::borrow::Cow;
 
 pub mod timed;
@@ -128,7 +130,7 @@ where
             state: &mut Self::State,
             message: Self::Message,
         ) -> Task<Self::Message> {
-            self.update.update(state, message)
+            debug::hot(|| self.update.update(state, message))
         }
 
         fn view<'a>(
@@ -136,7 +138,7 @@ where
             state: &'a Self::State,
             _window: window::Id,
         ) -> Element<'a, Self::Message, Self::Theme, Self::Renderer> {
-            self.view.view(state)
+            debug::hot(|| self.view.view(state))
         }
 
         fn settings(&self) -> Settings {
@@ -342,7 +344,7 @@ impl<P: Program> Application<P> {
     > {
         Application {
             raw: program::with_title(self.raw, move |state, _window| {
-                title.title(state)
+                debug::hot(|| title.title(state))
             }),
             settings: self.settings,
             window: self.window,
@@ -359,7 +361,9 @@ impl<P: Program> Application<P> {
         impl Program<State = P::State, Message = P::Message, Theme = P::Theme>,
     > {
         Application {
-            raw: program::with_subscription(self.raw, f),
+            raw: program::with_subscription(self.raw, move |state| {
+                debug::hot(|| f(state))
+            }),
             settings: self.settings,
             window: self.window,
             #[cfg(feature = "test")]
@@ -375,7 +379,9 @@ impl<P: Program> Application<P> {
         impl Program<State = P::State, Message = P::Message, Theme = P::Theme>,
     > {
         Application {
-            raw: program::with_theme(self.raw, move |state, _window| f(state)),
+            raw: program::with_theme(self.raw, move |state, _window| {
+                debug::hot(|| f(state))
+            }),
             settings: self.settings,
             window: self.window,
             #[cfg(feature = "test")]
@@ -391,7 +397,9 @@ impl<P: Program> Application<P> {
         impl Program<State = P::State, Message = P::Message, Theme = P::Theme>,
     > {
         Application {
-            raw: program::with_style(self.raw, f),
+            raw: program::with_style(self.raw, move |state, theme| {
+                debug::hot(|| f(state, theme))
+            }),
             settings: self.settings,
             window: self.window,
             #[cfg(feature = "test")]
@@ -408,7 +416,7 @@ impl<P: Program> Application<P> {
     > {
         Application {
             raw: program::with_scale_factor(self.raw, move |state, _window| {
-                f(state)
+                debug::hot(|| f(state))
             }),
             settings: self.settings,
             window: self.window,

src/application/timed.rs

@@ -6,6 +6,8 @@ use crate::time::Instant;
 use crate::window;
 use crate::{Element, Program, Settings, Subscription, Task};
 
+use iced_debug as debug;
+
 /// Creates an [`Application`] with an `update` function that also
 /// takes the [`Instant`] of each `Message`.
 ///
@@ -101,10 +103,12 @@ where
             state: &mut Self::State,
             (message, now): Self::Message,
         ) -> Task<Self::Message> {
-            self.update
+            debug::hot(move || {
-                .update(state, message, now)
+                self.update
-                .into()
+                    .update(state, message, now)
-                .map(|message| (message, Instant::now()))
+                    .into()
+                    .map(|message| (message, Instant::now()))
+            })
         }
 
         fn view<'a>(
@@ -112,16 +116,21 @@ where
             state: &'a Self::State,
             _window: window::Id,
         ) -> Element<'a, Self::Message, Self::Theme, Self::Renderer> {
-            self.view
+            debug::hot(|| {
-                .view(state)
+                self.view
-                .map(|message| (message, Instant::now()))
+                    .view(state)
+                    .map(|message| (message, Instant::now()))
+            })
         }
 
         fn subscription(
             &self,
             state: &Self::State,
         ) -> self::Subscription<Self::Message> {
-            (self.subscription)(state).map(|message| (message, Instant::now()))
+            debug::hot(|| {
+                (self.subscription)(state)
+                    .map(|message| (message, Instant::now()))
+            })
         }
     }
 

src/daemon.rs

@@ -6,6 +6,8 @@ use crate::theme;
 use crate::window;
 use crate::{Element, Executor, Font, Result, Settings, Subscription, Task};
 
+use iced_debug as debug;
+
 use std::borrow::Cow;
 
 /// Creates an iced [`Daemon`] given its boot, update, and view logic.
@@ -76,7 +78,7 @@ where
             state: &mut Self::State,
             message: Self::Message,
         ) -> Task<Self::Message> {
-            self.update.update(state, message)
+            debug::hot(|| self.update.update(state, message))
         }
 
         fn view<'a>(
@@ -84,7 +86,7 @@ where
             state: &'a Self::State,
             window: window::Id,
         ) -> Element<'a, Self::Message, Self::Theme, Self::Renderer> {
-            self.view.view(state, window)
+            debug::hot(|| self.view.view(state, window))
         }
     }
 
@@ -182,7 +184,7 @@ impl<P: Program> Daemon<P> {
     > {
         Daemon {
             raw: program::with_title(self.raw, move |state, window| {
-                title.title(state, window)
+                debug::hot(|| title.title(state, window))
             }),
             settings: self.settings,
         }
@@ -196,7 +198,9 @@ impl<P: Program> Daemon<P> {
         impl Program<State = P::State, Message = P::Message, Theme = P::Theme>,
     > {
         Daemon {
-            raw: program::with_subscription(self.raw, f),
+            raw: program::with_subscription(self.raw, move |state| {
+                debug::hot(|| f(state))
+            }),
             settings: self.settings,
         }
     }
@@ -209,7 +213,9 @@ impl<P: Program> Daemon<P> {
         impl Program<State = P::State, Message = P::Message, Theme = P::Theme>,
     > {
         Daemon {
-            raw: program::with_theme(self.raw, f),
+            raw: program::with_theme(self.raw, move |state, window| {
+                debug::hot(|| f(state, window))
+            }),
             settings: self.settings,
         }
     }
@@ -222,7 +228,9 @@ impl<P: Program> Daemon<P> {
         impl Program<State = P::State, Message = P::Message, Theme = P::Theme>,
     > {
         Daemon {
-            raw: program::with_style(self.raw, f),
+            raw: program::with_style(self.raw, move |state, theme| {
+                debug::hot(|| f(state, theme))
+            }),
             settings: self.settings,
         }
     }
@@ -235,7 +243,9 @@ impl<P: Program> Daemon<P> {
         impl Program<State = P::State, Message = P::Message, Theme = P::Theme>,
     > {
         Daemon {
-            raw: program::with_scale_factor(self.raw, f),
+            raw: program::with_scale_factor(self.raw, move |state, window| {
+                debug::hot(|| f(state, window))
+            }),
             settings: self.settings,
         }
     }

src/lib.rs

@@ -34,7 +34,7 @@
 //!     iced::run(update, view)
 //! }
 //! # fn update(state: &mut (), message: ()) {}
-//! # fn view(state: &()) -> iced::Element<()> { iced::widget::text("").into() }
+//! # fn view(state: &()) -> iced::Element<'_, ()> { iced::widget::text("").into() }
 //! ```
 //!
 //! Define an `update` function to __change__ your state:
@@ -55,7 +55,7 @@
 //! use iced::widget::{button, text};
 //! use iced::Element;
 //!
-//! fn view(counter: &u64) -> Element<Message> {
+//! fn view(counter: &u64) -> Element<'_, Message> {
 //!     button(text(counter)).on_press(Message::Increment).into()
 //! }
 //! # #[derive(Clone)]
@@ -95,7 +95,7 @@
 //!     }
 //! }
 //!
-//! fn view(counter: &Counter) -> Element<Message> {
+//! fn view(counter: &Counter) -> Element<'_, Message> {
 //!     button(text(counter.value)).on_press(Message::Increment).into()
 //! }
 //! ```
@@ -115,7 +115,7 @@
 //! use iced::widget::{button, column, text};
 //! use iced::Element;
 //!
-//! fn view(counter: &Counter) -> Element<Message> {
+//! fn view(counter: &Counter) -> Element<'_, Message> {
 //!     column![
 //!         text(counter.value).size(20),
 //!         button("Increment").on_press(Message::Increment),
@@ -144,7 +144,7 @@
 //! use iced::widget::{column, container, row};
 //! use iced::{Fill, Element};
 //!
-//! fn view(state: &State) -> Element<Message> {
+//! fn view(state: &State) -> Element<'_, Message> {
 //!     container(
 //!         column![
 //!             "Top",
@@ -187,7 +187,7 @@
 //! use iced::widget::container;
 //! use iced::Element;
 //!
-//! fn view(state: &State) -> Element<Message> {
+//! fn view(state: &State) -> Element<'_, Message> {
 //!     container("I am 300px tall!").height(300).into()
 //! }
 //! ```
@@ -216,7 +216,7 @@
 //!     Theme::TokyoNight
 //! }
 //! # fn update(state: &mut State, message: ()) {}
-//! # fn view(state: &State) -> iced::Element<()> { iced::widget::text("").into() }
+//! # fn view(state: &State) -> iced::Element<'_, ()> { iced::widget::text("").into() }
 //! ```
 //!
 //! The `theme` function takes the current state of the application, allowing the
@@ -237,7 +237,7 @@
 //! use iced::widget::container;
 //! use iced::Element;
 //!
-//! fn view(state: &State) -> Element<Message> {
+//! fn view(state: &State) -> Element<'_, Message> {
 //!     container("I am a rounded box!").style(container::rounded_box).into()
 //! }
 //! ```
@@ -252,7 +252,7 @@
 //! use iced::widget::button;
 //! use iced::{Element, Theme};
 //!
-//! fn view(state: &State) -> Element<Message> {
+//! fn view(state: &State) -> Element<'_, Message> {
 //!     button("I am a styled button!").style(|theme: &Theme, status| {
 //!         let palette = theme.extended_palette();
 //!
@@ -359,7 +359,7 @@
 //! }
 //! # fn new() -> State { State }
 //! # fn update(state: &mut State, message: Message) {}
-//! # fn view(state: &State) -> iced::Element<Message> { iced::widget::text("").into() }
+//! # fn view(state: &State) -> iced::Element<'_, Message> { iced::widget::text("").into() }
 //! ```
 //!
 //! A [`Subscription`] is [a _declarative_ builder of streams](Subscription#the-lifetime-of-a-subscription)
@@ -452,7 +452,7 @@
 //!     }
 //! }
 //!
-//! fn view(state: &State) -> Element<Message> {
+//! fn view(state: &State) -> Element<'_, Message> {
 //!     match &state.screen {
 //!         Screen::Contacts(contacts) => contacts.view().map(Message::Contacts),
 //!         Screen::Conversation(conversation) => conversation.view().map(Message::Conversation),
@@ -659,8 +659,8 @@ pub type Element<
 /// The result of running an iced program.
 pub type Result = std::result::Result<(), Error>;
 
-/// Runs a basic iced application with default [`Settings`] given its title,
+/// Runs a basic iced application with default [`Settings`] given its update
-/// update, and view logic.
+/// and view logic.
 ///
 /// This is equivalent to chaining [`application()`] with [`Application::run`].
 ///

test/src/emulator.rs

@@ -153,6 +153,9 @@ impl<P: Program + 'static> Emulator<P> {
             Action::Exit => {
                 // TODO
             }
+            Action::Reload => {
+                // TODO
+            }
         }
     }
 

wgpu/src/text.rs

@@ -626,10 +626,10 @@ fn prepare(
                 scale: transformation.scale_factor()
                     * layer_transformation.scale_factor(),
                 bounds: cryoglyph::TextBounds {
-                    left: clip_bounds.x as i32,
+                    left: clip_bounds.x.round() as i32,
-                    top: clip_bounds.y as i32,
+                    top: clip_bounds.y.round() as i32,
-                    right: (clip_bounds.x + clip_bounds.width) as i32,
+                    right: (clip_bounds.x + clip_bounds.width).round() as i32,
-                    bottom: (clip_bounds.y + clip_bounds.height) as i32,
+                    bottom: (clip_bounds.y + clip_bounds.height).round() as i32,
                 },
                 default_color: to_color(color),
             })

wgpu/src/window/compositor.rs

@@ -96,7 +96,7 @@ impl Compositor {
         let adapter = instance
             .request_adapter(&adapter_options)
             .await
-            .ok_or(Error::NoAdapterFound(format!("{:?}", adapter_options)))?;
+            .ok_or(Error::NoAdapterFound(format!("{adapter_options:?}")))?;
 
         log::info!("Selected: {:#?}", adapter.get_info());
 

widget/src/container.rs

@@ -400,9 +400,9 @@ where
     Renderer: core::Renderer + 'a,
 {
     fn from(
-        column: Container<'a, Message, Theme, Renderer>,
+        container: Container<'a, Message, Theme, Renderer>,
     ) -> Element<'a, Message, Theme, Renderer> {
-        Element::new(column)
+        Element::new(container)
     }
 }
 

widget/src/markdown.rs

@@ -50,7 +50,10 @@ use crate::core::theme;
 use crate::core::{
     self, Color, Element, Length, Padding, Pixels, Theme, color,
 };
-use crate::{column, container, rich_text, row, scrollable, span, text};
+use crate::{
+    column, container, horizontal_rule, rich_text, row, rule, scrollable, span,
+    text, vertical_rule,
+};
 
 use std::borrow::BorrowMut;
 use std::cell::{Cell, RefCell};
@@ -208,6 +211,10 @@ pub enum Item {
         /// The alternative text of the image.
         alt: Text,
     },
+    /// A quote.
+    Quote(Vec<Item>),
+    /// A horizontal separator.
+    Rule,
 }
 
 /// A bunch of parsed Markdown text.
@@ -339,8 +346,8 @@ impl Span {
 ///
 ///     fn view(&self) -> Element<'_, Message> {
 ///         markdown::view(&self.markdown, Theme::TokyoNight)
-///            .map(Message::LinkClicked)
+///             .map(Message::LinkClicked)
-///            .into()
+///             .into()
 ///     }
 ///
 ///     fn update(state: &mut State, message: Message) {
@@ -454,6 +461,7 @@ fn parse_with<'a>(
 ) -> impl Iterator<Item = (Item, &'a str, HashSet<String>)> + 'a {
     enum Scope {
         List(List),
+        Quote(Vec<Item>),
     }
 
     struct List {
@@ -524,6 +532,9 @@ fn parse_with<'a>(
                 Scope::List(list) => {
                     list.items.last_mut().expect("item context").push(item);
                 }
+                Scope::Quote(items) => {
+                    items.push(item);
+                }
             }
 
             None
@@ -605,6 +616,22 @@ fn parse_with<'a>(
 
                 None
             }
+            pulldown_cmark::Tag::BlockQuote(_kind) if !metadata && !table => {
+                let prev = if spans.is_empty() {
+                    None
+                } else {
+                    produce(
+                        state.borrow_mut(),
+                        &mut stack,
+                        Item::Paragraph(Text::new(spans.drain(..).collect())),
+                        source,
+                    )
+                };
+
+                stack.push(Scope::Quote(Vec::new()));
+
+                prev
+            }
             pulldown_cmark::Tag::CodeBlock(
                 pulldown_cmark::CodeBlockKind::Fenced(language),
             ) if !metadata && !table => {
@@ -703,7 +730,9 @@ fn parse_with<'a>(
             pulldown_cmark::TagEnd::List(_) if !metadata && !table => {
                 let scope = stack.pop()?;
 
-                let Scope::List(list) = scope;
+                let Scope::List(list) = scope else {
+                    return None;
+                };
 
                 produce(
                     state.borrow_mut(),
@@ -715,6 +744,22 @@ fn parse_with<'a>(
                     source,
                 )
             }
+            pulldown_cmark::TagEnd::BlockQuote(_kind)
+                if !metadata && !table =>
+            {
+                let scope = stack.pop()?;
+
+                let Scope::Quote(quote) = scope else {
+                    return None;
+                };
+
+                produce(
+                    state.borrow_mut(),
+                    &mut stack,
+                    Item::Quote(quote),
+                    source,
+                )
+            }
             pulldown_cmark::TagEnd::Image if !metadata && !table => {
                 let (url, title) = image.take()?;
                 let alt = Text::new(spans.drain(..).collect());
@@ -834,6 +879,9 @@ fn parse_with<'a>(
             });
             None
         }
+        pulldown_cmark::Event::Rule => {
+            produce(state.borrow_mut(), &mut stack, Item::Rule, source)
+        }
         _ => None,
     })
 }
@@ -1063,6 +1111,8 @@ where
             start: Some(start),
             items,
         } => viewer.ordered_list(settings, *start, items),
+        Item::Quote(quote) => viewer.quote(settings, quote),
+        Item::Rule => viewer.rule(settings),
     }
 }
 
@@ -1226,7 +1276,44 @@ where
     .into()
 }
 
-/// A view strategy to display a Markdown [`Item`].j
+/// Displays a quote using the default look.
+pub fn quote<'a, Message, Theme, Renderer>(
+    viewer: &impl Viewer<'a, Message, Theme, Renderer>,
+    settings: Settings,
+    contents: &'a [Item],
+) -> Element<'a, Message, Theme, Renderer>
+where
+    Message: 'a,
+    Theme: Catalog + 'a,
+    Renderer: core::text::Renderer<Font = Font> + 'a,
+{
+    row![
+        vertical_rule(4),
+        column(
+            contents
+                .iter()
+                .enumerate()
+                .map(|(i, content)| item(viewer, settings, content, i)),
+        )
+        .spacing(settings.spacing.0),
+    ]
+    .height(Length::Shrink)
+    .spacing(settings.spacing.0)
+    .into()
+}
+
+/// Displays a rule using the default look.
+pub fn rule<'a, Message, Theme, Renderer>()
+-> Element<'a, Message, Theme, Renderer>
+where
+    Message: 'a,
+    Theme: Catalog + 'a,
+    Renderer: core::text::Renderer<Font = Font> + 'a,
+{
+    horizontal_rule(2).into()
+}
+
+/// A view strategy to display a Markdown [`Item`].
 pub trait Viewer<'a, Message, Theme = crate::Theme, Renderer = crate::Renderer>
 where
     Self: Sized + 'a,
@@ -1321,6 +1408,27 @@ where
     ) -> Element<'a, Message, Theme, Renderer> {
         ordered_list(self, settings, start, items)
     }
+
+    /// Displays a quote.
+    ///
+    /// By default, it calls [`quote`].
+    fn quote(
+        &self,
+        settings: Settings,
+        contents: &'a [Item],
+    ) -> Element<'a, Message, Theme, Renderer> {
+        quote(self, settings, contents)
+    }
+
+    /// Displays a rule.
+    ///
+    /// By default, it calls [`rule`](self::rule()).
+    fn rule(
+        &self,
+        _settings: Settings,
+    ) -> Element<'a, Message, Theme, Renderer> {
+        rule()
+    }
 }
 
 #[derive(Debug, Clone, Copy)]
@@ -1338,7 +1446,7 @@ where
 
 /// The theme catalog of Markdown items.
 pub trait Catalog:
-    container::Catalog + scrollable::Catalog + text::Catalog
+    container::Catalog + scrollable::Catalog + rule::Catalog + text::Catalog
 {
     /// The styling class of a Markdown code block.
     fn code_block<'a>() -> <Self as container::Catalog>::Class<'a>;

widget/src/pane_grid.rs

@@ -297,11 +297,11 @@ where
     }
 
     fn drag_enabled(&self) -> bool {
-        self.internal
+        if self.internal.maximized().is_none() {
-            .maximized()
+            self.on_drag.is_some()
-            .is_none()
+        } else {
-            .then(|| self.on_drag.is_some())
+            Default::default()
-            .unwrap_or_default()
+        }
     }
 
     fn grid_interaction(

widget/src/rule.rs

@@ -134,9 +134,7 @@ where
         let style = theme.style(&self.class);
 
         let bounds = if self.is_horizontal {
-            let line_y = (bounds.y + (bounds.height / 2.0)
+            let line_y = (bounds.y + (bounds.height / 2.0)).round();
-                - (style.width as f32 / 2.0))
-                .round();
 
             let (offset, line_width) = style.fill_mode.fill(bounds.width);
             let line_x = bounds.x + offset;
@@ -145,12 +143,10 @@ where
                 x: line_x,
                 y: line_y,
                 width: line_width,
-                height: style.width as f32,
+                height: bounds.height,
             }
         } else {
-            let line_x = (bounds.x + (bounds.width / 2.0)
+            let line_x = (bounds.x + (bounds.width / 2.0)).round();
-                - (style.width as f32 / 2.0))
-                .round();
 
             let (offset, line_height) = style.fill_mode.fill(bounds.height);
             let line_y = bounds.y + offset;
@@ -158,7 +154,7 @@ where
             Rectangle {
                 x: line_x,
                 y: line_y,
-                width: style.width as f32,
+                width: bounds.width,
                 height: line_height,
             }
         };
@@ -167,6 +163,7 @@ where
             renderer::Quad {
                 bounds,
                 border: border::rounded(style.radius),
+                snap: style.snap,
                 ..renderer::Quad::default()
             },
             style.color,
@@ -191,12 +188,12 @@ where
 pub struct Style {
     /// The color of the rule.
     pub color: Color,
-    /// The width (thickness) of the rule line.
-    pub width: u16,
     /// The radius of the line corners.
     pub radius: border::Radius,
     /// The [`FillMode`] of the rule.
     pub fill_mode: FillMode,
+    /// Whether the rule should be snapped to the pixel grid.
+    pub snap: bool,
 }
 
 /// The fill mode of a rule.
@@ -298,8 +295,8 @@ pub fn default(theme: &Theme) -> Style {
 
     Style {
         color: palette.background.strong.color,
-        width: 1,
         radius: 0.0.into(),
         fill_mode: FillMode::Full,
+        snap: true,
     }
 }

widget/src/scrollable.rs

@@ -438,7 +438,7 @@ where
                 },
                 |limits| {
                     let child_limits = layout::Limits::new(
-                        Size::new(limits.min().width, limits.min().height),
+                        limits.min(),
                         Size::new(
                             if self.direction.horizontal().is_some() {
                                 f32::INFINITY

winit/src/lib.rs

@@ -85,6 +85,15 @@ where
 
     let (proxy, worker) = Proxy::new(event_loop.create_proxy());
 
+    #[cfg(feature = "debug")]
+    {
+        let proxy = proxy.clone();
+
+        debug::on_hotpatch(move || {
+            proxy.send_action(Action::Reload);
+        });
+    }
+
     let mut runtime = {
         let executor =
             P::Executor::new().map_err(Error::ExecutorCreationFailed)?;
@@ -527,7 +536,7 @@ async fn run_instance<P>(
 
                     let create_compositor = {
                         let window = window.clone();
-                        let mut proxy = proxy.clone();
+                        let proxy = proxy.clone();
                         let default_fonts = default_fonts.clone();
 
                         async move {
@@ -801,7 +810,7 @@ async fn run_instance<P>(
                             Err(error) => match error {
                                 // This is an unrecoverable error.
                                 compositor::SurfaceError::OutOfMemory => {
-                                    panic!("{:?}", error);
+                                    panic!("{error:?}");
                                 }
                                 _ => {
                                     present_span.finish();
@@ -1075,9 +1084,9 @@ fn update<P: Program, E: Executor>(
     runtime.track(recipes);
 }
 
-fn run_action<P, C>(
+fn run_action<'a, P, C>(
     action: Action<P::Message>,
-    program: &program::Instance<P>,
+    program: &'a program::Instance<P>,
     compositor: &mut Option<C>,
     events: &mut Vec<(window::Id, core::Event)>,
     messages: &mut Vec<P::Message>,
@@ -1085,7 +1094,7 @@ fn run_action<P, C>(
     control_sender: &mut mpsc::UnboundedSender<Control>,
     interfaces: &mut FxHashMap<
         window::Id,
-        UserInterface<'_, P::Message, P::Theme, P::Renderer>,
+        UserInterface<'a, P::Message, P::Theme, P::Renderer>,
     >,
     window_manager: &mut WindowManager<P, C>,
     ui_caches: &mut FxHashMap<window::Id, user_interface::Cache>,
@@ -1437,6 +1446,29 @@ fn run_action<P, C>(
                 let _ = channel.send(Ok(()));
             }
         }
+        Action::Reload => {
+            for (id, window) in window_manager.iter_mut() {
+                let Some(ui) = interfaces.remove(&id) else {
+                    continue;
+                };
+
+                let cache = ui.into_cache();
+                let size = window.size();
+
+                let _ = interfaces.insert(
+                    id,
+                    build_user_interface(
+                        program,
+                        cache,
+                        &mut window.renderer,
+                        size,
+                        id,
+                    ),
+                );
+
+                window.raw.request_redraw();
+            }
+        }
         Action::Exit => {
             control_sender
                 .start_send(Control::Exit)

winit/src/proxy.rs

@@ -77,7 +77,7 @@ impl<T: 'static> Proxy<T> {
     ///
     /// Note: This skips the backpressure mechanism with an unbounded
     /// channel. Use sparingly!
-    pub fn send(&mut self, value: T)
+    pub fn send(&self, value: T)
     where
         T: std::fmt::Debug,
     {
@@ -88,13 +88,11 @@ impl<T: 'static> Proxy<T> {
     ///
     /// Note: This skips the backpressure mechanism with an unbounded
     /// channel. Use sparingly!
-    pub fn send_action(&mut self, action: Action<T>)
+    pub fn send_action(&self, action: Action<T>)
     where
         T: std::fmt::Debug,
     {
-        self.raw
+        let _ = self.raw.send_event(action);
-            .send_event(action)
-            .expect("Send message to event loop");
     }
 
     /// Frees an amount of slots for additional messages to be queued in