Reintroduce Box for style_sheet in Container

examples/game_of_life/src/main.rs

@@ -150,7 +150,7 @@ impl Application for GameOfLife {
         Container::new(content)
             .width(Length::Fill)
             .height(Length::Fill)
-            .style(&style::Container)
+            .style(style::Container)
             .into()
     }
 }

examples/pane_grid/src/main.rs

@@ -178,9 +178,9 @@ impl Application for Example {
                 .controls(pane.controls.view(id, total_panes, pane.is_pinned))
                 .padding(10)
                 .style(if is_focused {
-                    &style::TitleBar::Focused
+                    style::TitleBar::Focused
                 } else {
-                    &style::TitleBar::Active
+                    style::TitleBar::Active
                 });
 
             pane_grid::Content::new(pane.content.view(
@@ -190,9 +190,9 @@ impl Application for Example {
             ))
             .title_bar(title_bar)
             .style(if is_focused {
-                &style::Pane::Focused
+                style::Pane::Focused
             } else {
-                &style::Pane::Active
+                style::Pane::Active
             })
         })
         .width(Length::Fill)

examples/scrollable/src/main.rs

@@ -164,7 +164,7 @@ impl Sandbox for ScrollableDemo {
                             Container::new(scrollable)
                                 .width(Length::Fill)
                                 .height(Length::Fill)
-                                .style(theme.clone().into()),
+                                .style(*theme),
                         )
                         .push(ProgressBar::new(
                             0.0..=1.0,
@@ -190,7 +190,7 @@ impl Sandbox for ScrollableDemo {
             .height(Length::Fill)
             .center_x()
             .center_y()
-            .style(self.theme.into())
+            .style(self.theme)
             .into()
     }
 }

examples/scrollable/src/style.rs

@@ -16,11 +16,11 @@ impl Default for Theme {
     }
 }
 
-impl From<Theme> for &'static dyn container::StyleSheet {
+impl<'a> From<Theme> for Box<dyn container::StyleSheet + 'a> {
     fn from(theme: Theme) -> Self {
         match theme {
             Theme::Light => Default::default(),
-            Theme::Dark => &dark::Container,
+            Theme::Dark => dark::Container.into(),
         }
     }
 }

examples/styling/src/main.rs

@@ -149,7 +149,7 @@ impl Sandbox for Styling {
             .height(Length::Fill)
             .center_x()
             .center_y()
-            .style(self.theme.into())
+            .style(self.theme)
             .into()
     }
 }
@@ -176,11 +176,11 @@ mod style {
         }
     }
 
-    impl From<Theme> for &'static dyn container::StyleSheet {
+    impl<'a> From<Theme> for Box<dyn container::StyleSheet + 'a> {
         fn from(theme: Theme) -> Self {
             match theme {
                 Theme::Light => Default::default(),
-                Theme::Dark => &dark::Container,
+                Theme::Dark => dark::Container.into(),
             }
         }
     }

examples/tooltip/src/main.rs

@@ -115,7 +115,7 @@ fn tooltip<'a>(
     )
     .gap(5)
     .padding(10)
-    .style(&style::Tooltip)
+    .style(style::Tooltip)
     .into()
 }
 

native/src/widget/container.rs

@@ -28,7 +28,7 @@ pub struct Container<'a, Message, Renderer> {
     max_height: u32,
     horizontal_alignment: alignment::Horizontal,
     vertical_alignment: alignment::Vertical,
-    style_sheet: &'a dyn StyleSheet,
+    style_sheet: Box<dyn StyleSheet + 'a>,
     content: Element<'a, Message, Renderer>,
 }
 
@@ -109,8 +109,11 @@ where
     }
 
     /// Sets the style of the [`Container`].
-    pub fn style(mut self, style_sheet: &'a dyn StyleSheet) -> Self {
+    pub fn style(
-        self.style_sheet = style_sheet;
+        mut self,
+        style_sheet: impl Into<Box<dyn StyleSheet + 'a>>,
+    ) -> Self {
+        self.style_sheet = style_sheet.into();
         self
     }
 }

native/src/widget/pane_grid/content.rs

@@ -14,7 +14,7 @@ use crate::{Clipboard, Element, Hasher, Layout, Point, Rectangle, Size};
 pub struct Content<'a, Message, Renderer> {
     title_bar: Option<TitleBar<'a, Message, Renderer>>,
     body: Element<'a, Message, Renderer>,
-    style_sheet: &'a dyn container::StyleSheet,
+    style_sheet: Box<dyn container::StyleSheet + 'a>,
 }
 
 impl<'a, Message, Renderer> Content<'a, Message, Renderer>
@@ -40,8 +40,11 @@ where
     }
 
     /// Sets the style of the [`Content`].
-    pub fn style(mut self, style_sheet: &'a dyn container::StyleSheet) -> Self {
+    pub fn style(
-        self.style_sheet = style_sheet;
+        mut self,
+        style_sheet: impl Into<Box<dyn container::StyleSheet + 'a>>,
+    ) -> Self {
+        self.style_sheet = style_sheet.into();
         self
     }
 }

native/src/widget/pane_grid/title_bar.rs

@@ -17,7 +17,7 @@ pub struct TitleBar<'a, Message, Renderer> {
     controls: Option<Element<'a, Message, Renderer>>,
     padding: Padding,
     always_show_controls: bool,
-    style_sheet: &'a dyn container::StyleSheet,
+    style_sheet: Box<dyn container::StyleSheet + 'a>,
 }
 
 impl<'a, Message, Renderer> TitleBar<'a, Message, Renderer>
@@ -54,8 +54,11 @@ where
     }
 
     /// Sets the style of the [`TitleBar`].
-    pub fn style(mut self, style: &'a dyn container::StyleSheet) -> Self {
+    pub fn style(
-        self.style_sheet = style;
+        mut self,
+        style: impl Into<Box<dyn container::StyleSheet + 'a>>,
+    ) -> Self {
+        self.style_sheet = style.into();
         self
     }
 

native/src/widget/tooltip.rs

@@ -20,7 +20,7 @@ pub struct Tooltip<'a, Message, Renderer: text::Renderer> {
     content: Element<'a, Message, Renderer>,
     tooltip: Text<Renderer>,
     position: Position,
-    style_sheet: &'a dyn container::StyleSheet,
+    style_sheet: Box<dyn container::StyleSheet + 'a>,
     gap: u16,
     padding: u16,
 }
@@ -77,8 +77,11 @@ where
     }
 
     /// Sets the style of the [`Tooltip`].
-    pub fn style(mut self, style_sheet: &'a dyn container::StyleSheet) -> Self {
+    pub fn style(
-        self.style_sheet = style_sheet;
+        mut self,
+        style_sheet: impl Into<Box<dyn container::StyleSheet + 'a>>,
+    ) -> Self {
+        self.style_sheet = style_sheet.into();
         self
     }
 }

style/src/container.rs

@@ -43,8 +43,17 @@ impl StyleSheet for Default {
     }
 }
 
-impl std::default::Default for &'static dyn StyleSheet {
+impl std::default::Default for Box<dyn StyleSheet> {
     fn default() -> Self {
-        &Default
+        Box::new(Default)
+    }
+}
+
+impl<'a, T> From<T> for Box<dyn StyleSheet + 'a>
+where
+    T: StyleSheet + 'a,
+{
+    fn from(style_sheet: T) -> Self {
+        Box::new(style_sheet)
     }
 }

web/src/widget/container.rs

@@ -19,7 +19,7 @@ pub struct Container<'a, Message> {
     max_height: u32,
     horizontal_alignment: alignment::Horizontal,
     vertical_alignment: alignment::Vertical,
-    style_sheet: &'a dyn StyleSheet,
+    style_sheet: Box<dyn StyleSheet + 'a>,
     content: Element<'a, Message>,
 }
 
@@ -89,8 +89,8 @@ impl<'a, Message> Container<'a, Message> {
     }
 
     /// Sets the style of the [`Container`].
-    pub fn style(mut self, style: &'a dyn StyleSheet) -> Self {
+    pub fn style(mut self, style: impl Into<Box<dyn StyleSheet + 'a>>) -> Self {
-        self.style_sheet = style;
+        self.style_sheet = style.into();
         self
     }
 }