refactor: remove not mandatory static lifetime

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

@@ -274,8 +274,8 @@ pub trait Renderer: crate::Renderer + Sized {
 impl<'a, Message, Renderer> From<Button<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
-    Renderer: 'static + self::Renderer,
+    Renderer: 'a + self::Renderer,
-    Message: 'static + Clone,
+    Message: 'a + Clone,
 {
     fn from(
         button: Button<'a, Message, Renderer>,

native/src/widget/checkbox.rs

@@ -252,8 +252,8 @@ pub trait Renderer: crate::Renderer {
 impl<'a, Message, Renderer> From<Checkbox<Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
-    Renderer: 'static + self::Renderer + text::Renderer + row::Renderer,
+    Renderer: 'a + self::Renderer + text::Renderer + row::Renderer,
-    Message: 'static,
+    Message: 'a,
 {
     fn from(
         checkbox: Checkbox<Message, Renderer>,

native/src/widget/column.rs

@@ -234,7 +234,7 @@ impl<'a, Message, Renderer> From<Column<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
     Renderer: 'a + self::Renderer,
-    Message: 'static,
+    Message: 'a,
 {
     fn from(
         column: Column<'a, Message, Renderer>,

native/src/widget/container.rs

@@ -228,7 +228,7 @@ impl<'a, Message, Renderer> From<Container<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
     Renderer: 'a + self::Renderer,
-    Message: 'static,
+    Message: 'a,
 {
     fn from(
         column: Container<'a, Message, Renderer>,

native/src/widget/pane_grid.rs

@@ -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(
+    pub fn on_drag<F>(mut self, f: F) -> Self
-        mut self,
+    where
-        f: impl Fn(DragEvent) -> Message + 'static,
+        F: 'static + Fn(DragEvent) -> Message,
-    ) -> Self {
+    {
         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(
+    pub fn on_resize<F>(mut self, f: F) -> Self
-        mut self,
+    where
-        f: impl Fn(ResizeEvent) -> Message + 'static,
+        F: 'static + Fn(ResizeEvent) -> Message,
-    ) -> Self {
+    {
         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(
+    pub fn on_key_press<F>(mut self, f: F) -> Self
-        mut self,
+    where
-        f: impl Fn(KeyPressEvent) -> Option<Message> + 'static,
+        F: 'static + Fn(KeyPressEvent) -> Option<Message>,
-    ) -> Self {
+    {
         self.on_key_press = Some(Box::new(f));
         self
     }
@@ -348,7 +348,7 @@ pub struct KeyPressEvent {
 impl<'a, Message, Renderer> Widget<Message, Renderer>
     for PaneGrid<'a, Message, Renderer>
 where
-    Renderer: self::Renderer + 'static,
+    Renderer: 'static + self::Renderer,
     Message: 'static,
 {
     fn width(&self) -> Length {
@@ -636,7 +636,7 @@ 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,
+    Renderer: 'static + self::Renderer,
     Message: 'static,
 {
     fn from(

native/src/widget/progress_bar.rs

@@ -157,8 +157,8 @@ pub trait Renderer: crate::Renderer {
 impl<'a, Message, Renderer> From<ProgressBar<Renderer>>
     for Element<'a, Message, Renderer>
 where
-    Renderer: 'static + self::Renderer,
+    Renderer: 'a + self::Renderer,
-    Message: 'static,
+    Message: 'a,
 {
     fn from(
         progress_bar: ProgressBar<Renderer>,

native/src/widget/radio.rs

@@ -211,8 +211,8 @@ pub trait Renderer: crate::Renderer {
 impl<'a, Message, Renderer> From<Radio<Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
-    Renderer: 'static + self::Renderer + row::Renderer + text::Renderer,
+    Renderer: 'a + 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

@@ -236,7 +236,7 @@ impl<'a, Message, Renderer> From<Row<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
     Renderer: 'a + self::Renderer,
-    Message: 'static,
+    Message: 'a,
 {
     fn from(row: Row<'a, Message, Renderer>) -> Element<'a, Message, Renderer> {
         Element::new(row)

native/src/widget/scrollable.rs

@@ -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

@@ -251,8 +251,8 @@ pub trait Renderer: crate::Renderer {
 impl<'a, Message, Renderer> From<Slider<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
-    Renderer: 'static + self::Renderer,
+    Renderer: 'a + self::Renderer,
-    Message: 'static,
+    Message: 'a,
 {
     fn from(
         slider: Slider<'a, Message, Renderer>,

native/src/widget/space.rs

@@ -97,7 +97,7 @@ 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/text_input.rs

@@ -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 + std::fmt::Debug,
 {
     fn from(
         text_input: TextInput<'a, Message, Renderer>,