Implement `Widget::mouse_interaction` for `PaneGrid`

... and fix rendering of drag interaction in `PaneGrid` by
introducing an explicit `with_translation` method to `Renderer`
and simplifying the `with_layer` and `Clip` primitive.

1 files changed, 21 insertions, 6 deletions

diff --git a/graphics/src/renderer.rs b/graphics/src/renderer.rs
index d90a3f1e..8b6c2217 100644
--- a/graphics/src/renderer.rs
+++ b/graphics/src/renderer.rs
@@ -51,10 +51,26 @@ where
         layout
     }
 
-    fn with_layer(
+    fn with_layer(&mut self, bounds: Rectangle, f: impl FnOnce(&mut Self)) {
+        let current_primitives =
+            std::mem::replace(&mut self.primitives, Vec::new());
+
+        f(self);
+
+        let layer_primitives =
+            std::mem::replace(&mut self.primitives, current_primitives);
+
+        self.primitives.push(Primitive::Clip {
+            bounds,
+            content: Box::new(Primitive::Group {
+                primitives: layer_primitives,
+            }),
+        });
+    }
+
+    fn with_translation(
         &mut self,
-        bounds: Rectangle,
-        offset: Vector<u32>,
+        translation: Vector,
         f: impl FnOnce(&mut Self),
     ) {
         let current_primitives =
@@ -65,9 +81,8 @@ where
         let layer_primitives =
             std::mem::replace(&mut self.primitives, current_primitives);
 
-        self.primitives.push(Primitive::Clip {
-            bounds,
-            offset,
+        self.primitives.push(Primitive::Translate {
+            translation,
             content: Box::new(Primitive::Group {
                 primitives: layer_primitives,
             }),