WrapperWidget::activate passthrough

CHANGELOG.md

@@ -65,6 +65,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   apps.
 - The default logging output has been trimmed to only show errors for wgpu,
   winit, and naga. Thanks to @bluenote10 for the feedback!
+- `WrapperWidget::activate`'s default implementation now activates the wrapped
+  widget.
 
 ### Fixed
 
@@ -82,6 +84,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `Resize` now performs a second layout pass, if necessary, to ensure that
   children widgets have an opportunity to fill the resized area. Additionally,
   the first SizeToFit measurement will be performed with the minimum dimension.
+- When a keyboard-activated widget activates another widget during its callback,
+  the key-up event now sends the deactivate event to the finally-activated
+  widget.
 
 ### Added
 

src/tree.rs

@@ -306,6 +306,12 @@ impl Tree {
         self.data.lock().active
     }
 
+    pub(crate) fn active_widget_id(&self) -> Option<WidgetId> {
+        let data = self.data.lock();
+
+        data.active.map(|node| data.nodes[node].widget.id())
+    }
+
     pub(crate) fn hovered_widget(&self) -> Option<LotId> {
         self.data.lock().hover
     }

src/widget.rs

@@ -674,7 +674,10 @@ pub trait WrapperWidget: Debug + Send + 'static {
 
     /// The widget has become the active widget.
     #[allow(unused_variables)]
-    fn activate(&mut self, context: &mut EventContext<'_>) {}
+    fn activate(&mut self, context: &mut EventContext<'_>) {
+        let child = self.child_mut().mounted(context);
+        context.for_other(&child).activate();
+    }
 
     /// The widget is no longer active.
     #[allow(unused_variables)]

src/window.rs

@@ -1430,7 +1430,7 @@ where
                     kludgine,
                 )
                 .activate();
-                self.keyboard_activated = Some(default.id());
+                self.keyboard_activated = self.tree.active_widget_id();
             }
         } else if let Some(keyboard_activated) = self
             .keyboard_activated