widget state

examples/view.rs

@@ -15,19 +15,22 @@ type Rsc = DefaultRsc<State>;
 struct Test {
     #[root]
     root: WeakWidget<Rect>,
+    cur: WeakState<bool>,
 }
 
 impl Test {
     pub fn new(rsc: &mut Rsc) -> Self {
         let root = rect(Color::RED).add(rsc);
-        Self { root }
+        let cur = rsc.create_state(root, false);
+        Self { root, cur }
     }
     pub fn toggle(&self, rsc: &mut Rsc) {
-        let rect = (self.root)(rsc);
-        if rect.color == Color::RED {
-            rect.color = Color::BLUE;
+        let cur = &mut rsc[self.cur];
+        *cur = !*cur;
+        if *cur {
+            rsc[self.root].color = Color::BLUE;
         } else {
-            rect.color = Color::RED;
+            rsc[self.root].color = Color::RED;
         }
     }
 }