tasks initial impl (still working on task_on trait method)

core/src/event/rsc.rs

@@ -2,9 +2,11 @@ use crate::{
     Event, EventCtx, EventLike, EventManager, HasUi, IdLike, Widget, WidgetEventFn, WidgetRef,
 };
 
-pub trait HasEvents: Sized + HasUi + 'static {
+pub trait HasState: 'static {
     type State;
+}
 
+pub trait HasEvents: Sized + HasUi + HasState {
     fn events(&self) -> &EventManager<Self>;
     fn events_mut(&mut self) -> &mut EventManager<Self>;
 
@@ -18,7 +20,7 @@ pub trait HasEvents: Sized + HasUi + 'static {
     }
 }
 
-pub trait RunEvents: HasEvents + 'static {
+pub trait RunEvents: HasEvents {
     fn run_event<E: EventLike>(
         &mut self,
         id: impl IdLike,
@@ -29,4 +31,4 @@ pub trait RunEvents: HasEvents + 'static {
         f(EventCtx { state, data }, self)
     }
 }
-impl<T: HasEvents + 'static> RunEvents for T {}
+impl<T: HasEvents> RunEvents for T {}

core/src/widget/handle.rs

@@ -169,3 +169,5 @@ fn null_ptr<W: ?Sized>() -> *const W {
         unsafe { std::mem::transmute_copy(&[0usize; 1]) }
     }
 }
+
+unsafe impl<W: ?Sized> Send for WidgetRef<W> {}