Merge pull request 'Request a frame after resize' (#3) from iris-ai/iris:split/02-resize-redraw into main

Reviewed-on: iris/iris#3
Reviewed-by: iris <2+iris@noreply.localhost>

core/src/ui/render_state.rs

@@ -52,7 +52,7 @@ impl UiRenderState {
             );
         }
         let root = root.into();
-        if self.root_changed(root) || self.resized {
+        if self.needs_full_redraw(root) {
             self.redraw_all(root, rsc);
             self.old_root = root.map(|r| r.id());
             self.resized = false;
@@ -218,12 +218,17 @@ impl UiRenderState {
         root.into().map(|r| r.id()) != self.old_root
     }
 
+    // Scheduling and drawing must use the same full-redraw predicate.
+    fn needs_full_redraw<'a>(&self, root: impl Into<Option<&'a StrongWidget>>) -> bool {
+        self.root_changed(root) || self.resized
+    }
+
     pub fn needs_redraw<'a>(
         &self,
         root: impl Into<Option<&'a StrongWidget>>,
         widgets: &Widgets,
     ) -> bool {
-        self.root_changed(root) || widgets.has_updates()
+        self.needs_full_redraw(root) || widgets.has_updates()
     }
 
     pub fn active_widgets(&self) -> usize {