remove state generic from a lot of things

core/src/event/rsc.rs

@@ -0,0 +1,29 @@
+use crate::{Event, EventCtx, EventLike, EventManager, HasEvents, HasUi, IdLike};
+
+pub trait HasRsc: Sized + 'static {
+    type Rsc: HasEvents<State = Self> + HasUi;
+    fn rsc(&self) -> &Self::Rsc;
+    fn rsc_mut(&mut self) -> &mut Self::Rsc;
+
+    fn run_event<E: EventLike>(&mut self, id: impl IdLike, data: &mut <E::Event as Event>::Data<'_>)
+    where
+        Self: 'static,
+    {
+        let f = self.rsc_mut().events().get_type::<E>().run_fn(id);
+        f(EventCtx { state: self, data })
+    }
+
+    fn events(&mut self) -> &mut EventManager<Self> {
+        self.rsc_mut().events()
+    }
+}
+
+impl<R: HasRsc> HasUi for R {
+    fn ui_ref(&self) -> &crate::Ui {
+        self.rsc().ui_ref()
+    }
+
+    fn ui(&mut self) -> &mut crate::Ui {
+        self.rsc_mut().ui()
+    }
+}