better global state structure?

core/src/ui/mod.rs

@@ -42,9 +42,25 @@ pub struct Ui {
     resized: bool,
 }
 
-pub trait HasUi: Sized + 'static {
-    fn ui_ref(&self) -> &Ui;
-    fn ui(&mut self) -> &mut Ui;
+pub trait HasUi: Sized {
+    fn get(&self) -> &Ui;
+    fn get_mut(&mut self) -> &mut Ui;
+    fn ui(&self) -> &Ui {
+        self.get()
+    }
+    fn ui_mut(&mut self) -> &mut Ui {
+        self.get_mut()
+    }
+}
+
+impl HasUi for Ui {
+    fn get(&self) -> &Ui {
+        self
+    }
+
+    fn get_mut(&mut self) -> &mut Ui {
+        self
+    }
 }
 
 impl Ui {