Implement theme styling for PaneGrid

style/src/pane_grid.rs

@@ -4,11 +4,13 @@ use iced_core::Color;
 
 /// A set of rules that dictate the style of a container.
 pub trait StyleSheet {
+    type Style: Default + Copy;
+
     /// The [`Line`] to draw when a split is picked.
-    fn picked_split(&self) -> Option<Line>;
+    fn picked_split(&self, style: Self::Style) -> Option<Line>;
 
     /// The [`Line`] to draw when a split is hovered.
-    fn hovered_split(&self) -> Option<Line>;
+    fn hovered_split(&self, style: Self::Style) -> Option<Line>;
 }
 
 /// A line.
@@ -22,30 +24,3 @@ pub struct Line {
     /// The width of the [`Line`].
     pub width: f32,
 }
-
-struct Default;
-
-impl StyleSheet for Default {
-    fn picked_split(&self) -> Option<Line> {
-        None
-    }
-
-    fn hovered_split(&self) -> Option<Line> {
-        None
-    }
-}
-
-impl<'a> std::default::Default for Box<dyn StyleSheet + 'a> {
-    fn default() -> Self {
-        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)
-    }
-}

style/src/theme.rs

@@ -4,6 +4,7 @@ pub use self::palette::Palette;
 
 use crate::application;
 use crate::button;
+use crate::pane_grid;
 use crate::radio;
 use crate::slider;
 use crate::toggler;
@@ -253,3 +254,28 @@ impl toggler::StyleSheet for Theme {
         }
     }
 }
+
+/*
+ * Pane Grid
+ */
+impl pane_grid::StyleSheet for Theme {
+    type Style = ();
+
+    fn picked_split(&self, _style: Self::Style) -> Option<pane_grid::Line> {
+        let palette = self.extended_palette();
+
+        Some(pane_grid::Line {
+            color: palette.primary.strong.color,
+            width: 2.0,
+        })
+    }
+
+    fn hovered_split(&self, _style: Self::Style) -> Option<pane_grid::Line> {
+        let palette = self.extended_palette();
+
+        Some(pane_grid::Line {
+            color: palette.primary.base.color,
+            width: 2.0,
+        })
+    }
+}