Implement theme styling for PaneGrid

pure/src/widget/pane_grid.rs

@@ -83,7 +83,11 @@ pub use iced_style::pane_grid::{Line, StyleSheet};
 ///     .on_resize(10, Message::PaneResized);
 /// ```
 #[allow(missing_debug_implementations)]
-pub struct PaneGrid<'a, Message, Renderer> {
+pub struct PaneGrid<'a, Message, Renderer>
+where
+    Renderer: iced_native::Renderer,
+    Renderer::Theme: StyleSheet,
+{
     state: &'a state::Internal,
     elements: Vec<(Pane, Content<'a, Message, Renderer>)>,
     width: Length,
@@ -92,12 +96,13 @@ pub struct PaneGrid<'a, Message, Renderer> {
     on_click: Option<Box<dyn Fn(Pane) -> Message + 'a>>,
     on_drag: Option<Box<dyn Fn(DragEvent) -> Message + 'a>>,
     on_resize: Option<(u16, Box<dyn Fn(ResizeEvent) -> Message + 'a>)>,
-    style_sheet: Box<dyn StyleSheet + 'a>,
+    style: <Renderer::Theme as StyleSheet>::Style,
 }
 
 impl<'a, Message, Renderer> PaneGrid<'a, Message, Renderer>
 where
     Renderer: iced_native::Renderer,
+    Renderer::Theme: StyleSheet,
 {
     /// Creates a [`PaneGrid`] with the given [`State`] and view function.
     ///
@@ -124,7 +129,7 @@ where
             on_click: None,
             on_drag: None,
             on_resize: None,
-            style_sheet: Default::default(),
+            style: Default::default(),
         }
     }
 
@@ -184,8 +189,11 @@ where
     }
 
     /// Sets the style of the [`PaneGrid`].
-    pub fn style(mut self, style: impl Into<Box<dyn StyleSheet + 'a>>) -> Self {
-        self.style_sheet = style.into();
+    pub fn style(
+        mut self,
+        style: impl Into<<Renderer::Theme as StyleSheet>::Style>,
+    ) -> Self {
+        self.style = style.into();
         self
     }
 }
@@ -194,6 +202,7 @@ impl<'a, Message, Renderer> Widget<Message, Renderer>
     for PaneGrid<'a, Message, Renderer>
 where
     Renderer: iced_native::Renderer,
+    Renderer::Theme: StyleSheet,
 {
     fn tag(&self) -> tree::Tag {
         tree::Tag::of::<state::Action>()
@@ -343,11 +352,12 @@ where
             layout,
             cursor_position,
             renderer,
+            theme,
             style,
             viewport,
             self.spacing,
             self.on_resize.as_ref().map(|(leeway, _)| *leeway),
-            self.style_sheet.as_ref(),
+            self.style,
             self.elements
                 .iter()
                 .zip(&tree.children)
@@ -391,8 +401,9 @@ where
 impl<'a, Message, Renderer> From<PaneGrid<'a, Message, Renderer>>
     for Element<'a, Message, Renderer>
 where
-    Renderer: 'a + iced_native::Renderer,
     Message: 'a,
+    Renderer: 'a + iced_native::Renderer,
+    Renderer::Theme: StyleSheet,
 {
     fn from(
         pane_grid: PaneGrid<'a, Message, Renderer>,