Merge pull request #245 from tirz/refactor-bound_lifetime

refactor: remove not mandatories 'static lifetimes

Cargo.toml

@@ -37,16 +37,16 @@ members = [
     "web",
     "wgpu",
     "winit",
-    "examples/download_progress",
     "examples/bezier_tool",
     "examples/clock",
     "examples/counter",
     "examples/custom_widget",
+    "examples/download_progress",
     "examples/events",
     "examples/geometry",
     "examples/integration",
-    "examples/pokedex",
     "examples/pane_grid",
+    "examples/pokedex",
     "examples/progress_bar",
     "examples/solar_system",
     "examples/stopwatch",

native/src/widget/button.rs

@@ -143,7 +143,7 @@ impl State {
 impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Button<'a, Message, Renderer>
 where
-    Renderer: self::Renderer,
+    Renderer: 'static + self::Renderer,
     Message: Clone,
 {
     fn width(&self) -> Length {
@@ -234,6 +234,8 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
+        std::any::TypeId::of::<Button<'_, (), Renderer>>().hash(state);
+
         self.width.hash(state);
         self.content.hash_layout(state);
     }
@@ -275,7 +277,7 @@ impl<'a, Message, Renderer> From<Button<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
     Renderer: 'static + self::Renderer,
-    Message: 'static + Clone,
+    Message: 'a + Clone,
 {
     fn from(
         button: Button<'a, Message, Renderer>,

native/src/widget/checkbox.rs

@@ -110,7 +110,7 @@ impl<Message, Renderer: self::Renderer + text::Renderer>
 impl<Message, Renderer> Widget<Message, Renderer>
     for Checkbox<Message, Renderer>
 where
-    Renderer: self::Renderer + text::Renderer + row::Renderer,
+    Renderer: 'static + self::Renderer + text::Renderer + row::Renderer,
 {
     fn width(&self) -> Length {
         self.width
@@ -205,6 +205,8 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
+        std::any::TypeId::of::<Checkbox<(), Renderer>>().hash(state);
+
         self.label.hash(state);
     }
 }
@@ -253,7 +255,7 @@ impl<'a, Message, Renderer> From<Checkbox<Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
     Renderer: 'static + self::Renderer + text::Renderer + row::Renderer,
-    Message: 'static,
+    Message: 'a,
 {
     fn from(
         checkbox: Checkbox<Message, Renderer>,

native/src/widget/column.rs

@@ -124,7 +124,7 @@ impl<'a, Message, Renderer> Column<'a, Message, Renderer> {
 impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Column<'a, Message, Renderer>
 where
-    Renderer: self::Renderer,
+    Renderer: 'static + self::Renderer,
 {
     fn width(&self) -> Length {
         self.width
@@ -190,7 +190,8 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
-        0.hash(state);
+        std::any::TypeId::of::<Column<'_, (), Renderer>>().hash(state);
+
         self.width.hash(state);
         self.height.hash(state);
         self.max_width.hash(state);
@@ -233,8 +234,8 @@ pub trait Renderer: crate::Renderer + Sized {
 impl<'a, Message, Renderer> From<Column<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
-    Renderer: 'a + self::Renderer,
-    Message: 'static,
+    Renderer: 'static + self::Renderer,
+    Message: 'a,
 {
     fn from(
         column: Column<'a, Message, Renderer>,

native/src/widget/container.rs

@@ -122,7 +122,7 @@ where
 impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Container<'a, Message, Renderer>
 where
-    Renderer: self::Renderer,
+    Renderer: 'static + self::Renderer,
 {
     fn width(&self) -> Length {
         self.width
@@ -189,7 +189,8 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
-        0.hash(state);
+        std::any::TypeId::of::<Container<'_, (), Renderer>>().hash(state);
+
         self.width.hash(state);
         self.height.hash(state);
         self.max_width.hash(state);
@@ -227,8 +228,8 @@ pub trait Renderer: crate::Renderer {
 impl<'a, Message, Renderer> From<Container<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
-    Renderer: 'a + self::Renderer,
-    Message: 'static,
+    Renderer: 'static + self::Renderer,
+    Message: 'a,
 {
     fn from(
         column: Container<'a, Message, Renderer>,

native/src/widget/image.rs

@@ -102,6 +102,8 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
+        std::any::TypeId::of::<Image>().hash(state);
+
         self.handle.hash(state);
         self.width.hash(state);
         self.height.hash(state);

native/src/widget/pane_grid.rs

@@ -80,9 +80,9 @@ pub struct PaneGrid<'a, Message, Renderer> {
     height: Length,
     spacing: u16,
     modifier_keys: keyboard::ModifiersState,
-    on_drag: Option<Box<dyn Fn(DragEvent) -> Message>>,
-    on_resize: Option<Box<dyn Fn(ResizeEvent) -> Message>>,
-    on_key_press: Option<Box<dyn Fn(KeyPressEvent) -> Option<Message>>>,
+    on_drag: Option<Box<dyn Fn(DragEvent) -> Message + 'a>>,
+    on_resize: Option<Box<dyn Fn(ResizeEvent) -> Message + 'a>>,
+    on_key_press: Option<Box<dyn Fn(KeyPressEvent) -> Option<Message> + 'a>>,
 }
 
 impl<'a, Message, Renderer> PaneGrid<'a, Message, Renderer> {
@@ -187,10 +187,10 @@ impl<'a, Message, Renderer> PaneGrid<'a, Message, Renderer> {
     /// Panes can be dragged using `Modifier keys + Left click`.
     ///
     /// [`PaneGrid`]: struct.PaneGrid.html
-    pub fn on_drag(
-        mut self,
-        f: impl Fn(DragEvent) -> Message + 'static,
-    ) -> Self {
+    pub fn on_drag<F>(mut self, f: F) -> Self
+    where
+        F: 'a + Fn(DragEvent) -> Message,
+    {
         self.on_drag = Some(Box::new(f));
         self
     }
@@ -201,10 +201,10 @@ impl<'a, Message, Renderer> PaneGrid<'a, Message, Renderer> {
     /// Panes can be resized using `Modifier keys + Right click`.
     ///
     /// [`PaneGrid`]: struct.PaneGrid.html
-    pub fn on_resize(
-        mut self,
-        f: impl Fn(ResizeEvent) -> Message + 'static,
-    ) -> Self {
+    pub fn on_resize<F>(mut self, f: F) -> Self
+    where
+        F: 'a + Fn(ResizeEvent) -> Message,
+    {
         self.on_resize = Some(Box::new(f));
         self
     }
@@ -226,10 +226,10 @@ impl<'a, Message, Renderer> PaneGrid<'a, Message, Renderer> {
     ///
     /// [`PaneGrid`]: struct.PaneGrid.html
     /// [`Pane`]: struct.Pane.html
-    pub fn on_key_press(
-        mut self,
-        f: impl Fn(KeyPressEvent) -> Option<Message> + 'static,
-    ) -> Self {
+    pub fn on_key_press<F>(mut self, f: F) -> Self
+    where
+        F: 'a + Fn(KeyPressEvent) -> Option<Message>,
+    {
         self.on_key_press = Some(Box::new(f));
         self
     }
@@ -348,8 +348,7 @@ pub struct KeyPressEvent {
 impl<'a, Message, Renderer> Widget<Message, Renderer>
     for PaneGrid<'a, Message, Renderer>
 where
-    Renderer: self::Renderer + 'static,
-    Message: 'static,
+    Renderer: 'static + self::Renderer,
 {
     fn width(&self) -> Length {
         self.width
@@ -591,7 +590,7 @@ where
     fn hash_layout(&self, state: &mut Hasher) {
         use std::hash::Hash;
 
-        std::any::TypeId::of::<PaneGrid<'_, Message, Renderer>>().hash(state);
+        std::any::TypeId::of::<PaneGrid<'_, (), Renderer>>().hash(state);
         self.width.hash(state);
         self.height.hash(state);
         self.state.hash_layout(state);
@@ -636,8 +635,8 @@ pub trait Renderer: crate::Renderer + Sized {
 impl<'a, Message, Renderer> From<PaneGrid<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
-    Renderer: self::Renderer + 'static,
-    Message: 'static,
+    Renderer: 'static + self::Renderer,
+    Message: 'a,
 {
     fn from(
         pane_grid: PaneGrid<'a, Message, Renderer>,

native/src/widget/progress_bar.rs

@@ -72,7 +72,7 @@ impl<Renderer: self::Renderer> ProgressBar<Renderer> {
 
 impl<Message, Renderer> Widget<Message, Renderer> for ProgressBar<Renderer>
 where
-    Renderer: self::Renderer,
+    Renderer: 'static + self::Renderer,
 {
     fn width(&self) -> Length {
         self.width
@@ -114,6 +114,8 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
+        std::any::TypeId::of::<ProgressBar<Renderer>>().hash(state);
+
         self.width.hash(state);
         self.height.hash(state);
     }
@@ -158,7 +160,7 @@ impl<'a, Message, Renderer> From<ProgressBar<Renderer>>
     for Element<'a, Message, Renderer>
 where
     Renderer: 'static + self::Renderer,
-    Message: 'static,
+    Message: 'a,
 {
     fn from(
         progress_bar: ProgressBar<Renderer>,

native/src/widget/radio.rs

@@ -77,7 +77,7 @@ impl<Message, Renderer: self::Renderer> Radio<Message, Renderer> {
 
 impl<Message, Renderer> Widget<Message, Renderer> for Radio<Message, Renderer>
 where
-    Renderer: self::Renderer + text::Renderer + row::Renderer,
+    Renderer: 'static + self::Renderer + text::Renderer + row::Renderer,
     Message: Clone,
 {
     fn width(&self) -> Length {
@@ -169,6 +169,8 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
+        std::any::TypeId::of::<Radio<(), Renderer>>().hash(state);
+
         self.label.hash(state);
     }
 }
@@ -212,7 +214,7 @@ impl<'a, Message, Renderer> From<Radio<Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
     Renderer: 'static + self::Renderer + row::Renderer + text::Renderer,
-    Message: 'static + Clone,
+    Message: 'a + Clone,
 {
     fn from(radio: Radio<Message, Renderer>) -> Element<'a, Message, Renderer> {
         Element::new(radio)

native/src/widget/row.rs

@@ -125,7 +125,7 @@ impl<'a, Message, Renderer> Row<'a, Message, Renderer> {
 impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Row<'a, Message, Renderer>
 where
-    Renderer: self::Renderer,
+    Renderer: 'static + self::Renderer,
 {
     fn width(&self) -> Length {
         self.width
@@ -191,7 +191,8 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
-        1.hash(state);
+        std::any::TypeId::of::<Row<'_, (), Renderer>>().hash(state);
+
         self.width.hash(state);
         self.height.hash(state);
         self.max_width.hash(state);
@@ -235,8 +236,8 @@ pub trait Renderer: crate::Renderer + Sized {
 impl<'a, Message, Renderer> From<Row<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
-    Renderer: 'a + self::Renderer,
-    Message: 'static,
+    Renderer: 'static + self::Renderer,
+    Message: 'a,
 {
     fn from(row: Row<'a, Message, Renderer>) -> Element<'a, Message, Renderer> {
         Element::new(row)

native/src/widget/scrollable.rs

@@ -311,7 +311,7 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
-        std::any::TypeId::of::<Scrollable<'static, (), Renderer>>().hash(state);
+        std::any::TypeId::of::<Scrollable<'_, (), Renderer>>().hash(state);
 
         self.height.hash(state);
         self.max_height.hash(state);
@@ -506,7 +506,7 @@ impl<'a, Message, Renderer> From<Scrollable<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
     Renderer: 'static + self::Renderer + column::Renderer,
-    Message: 'static,
+    Message: 'a,
 {
     fn from(
         scrollable: Scrollable<'a, Message, Renderer>,

native/src/widget/slider.rs

@@ -114,7 +114,7 @@ impl State {
 impl<'a, Message, Renderer> Widget<Message, Renderer>
     for Slider<'a, Message, Renderer>
 where
-    Renderer: self::Renderer,
+    Renderer: 'static + self::Renderer,
 {
     fn width(&self) -> Length {
         self.width
@@ -205,6 +205,8 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
+        std::any::TypeId::of::<Slider<'_, (), Renderer>>().hash(state);
+
         self.width.hash(state);
     }
 }
@@ -252,7 +254,7 @@ impl<'a, Message, Renderer> From<Slider<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
     Renderer: 'static + self::Renderer,
-    Message: 'static,
+    Message: 'a,
 {
     fn from(
         slider: Slider<'a, Message, Renderer>,

native/src/widget/space.rs

@@ -77,6 +77,7 @@ where
 
     fn hash_layout(&self, state: &mut Hasher) {
         std::any::TypeId::of::<Space>().hash(state);
+
         self.width.hash(state);
         self.height.hash(state);
     }
@@ -97,7 +98,7 @@ pub trait Renderer: crate::Renderer {
 impl<'a, Message, Renderer> From<Space> for Element<'a, Message, Renderer>
 where
     Renderer: self::Renderer,
-    Message: 'static,
+    Message: 'a,
 {
     fn from(space: Space) -> Element<'a, Message, Renderer> {
         Element::new(space)

native/src/widget/svg.rs

@@ -99,6 +99,8 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
+        std::any::TypeId::of::<Svg>().hash(state);
+
         self.width.hash(state);
         self.height.hash(state);
     }

native/src/widget/text.rs

@@ -163,6 +163,8 @@ where
     }
 
     fn hash_layout(&self, state: &mut Hasher) {
+        std::any::TypeId::of::<Text>().hash(state);
+
         self.content.hash(state);
         self.size.hash(state);
         self.width.hash(state);

native/src/widget/text_input.rs

@@ -172,7 +172,7 @@ impl<'a, Message, Renderer> Widget<Message, Renderer>
     for TextInput<'a, Message, Renderer>
 where
     Renderer: 'static + self::Renderer,
-    Message: Clone + std::fmt::Debug,
+    Message: Clone,
 {
     fn width(&self) -> Length {
         self.width
@@ -501,7 +501,7 @@ where
     fn hash_layout(&self, state: &mut Hasher) {
         use std::{any::TypeId, hash::Hash};
 
-        TypeId::of::<TextInput<'static, (), Renderer>>().hash(state);
+        TypeId::of::<TextInput<'_, (), Renderer>>().hash(state);
 
         self.width.hash(state);
         self.max_width.hash(state);
@@ -607,7 +607,7 @@ impl<'a, Message, Renderer> From<TextInput<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
     Renderer: 'static + self::Renderer,
-    Message: 'static + Clone + std::fmt::Debug,
+    Message: 'a + Clone,
 {
     fn from(
         text_input: TextInput<'a, Message, Renderer>,