switch away from handles to refs that must be upgraded once

src/event.rs

@@ -10,15 +10,15 @@ pub mod eventable {
             f: impl for<'a> WidgetEventFn<State::State, <E::Event as Event>::Data<'a>, WL::Widget>,
         ) -> impl WidgetIdFn<State, WL::Widget> {
             move |state| {
-                let id = self.handles(state);
-                state.register_event(id.r, event.into_event(), move |ctx| {
+                let id = self.add(state);
+                state.register_event(id, event.into_event(), move |ctx| {
                     f(&mut EventIdCtx {
-                        widget: id.r,
+                        widget: id,
                         state: ctx.state,
                         data: ctx.data,
                     });
                 });
-                id.h
+                id
             }
         }
     }