move event data out of widgetdata

core/src/event/manager.rs

@@ -1,17 +1,19 @@
 use crate::{
     ActiveData, Event, EventCtx, EventFn, EventIdCtx, EventLike, IdLike, LayerId, Widget,
-    WidgetData, WidgetEventFn, WidgetId, WidgetRef,
-    util::{HashMap, TypeMap},
+    WidgetEventFn, WidgetId, WidgetRef,
+    util::{HashMap, HashSet, TypeMap},
 };
 use std::{any::TypeId, rc::Rc};
 
 pub struct EventManager<State> {
+    widget_to_types: HashMap<WidgetId, HashSet<TypeId>>,
     types: TypeMap<dyn EventManagerLike<State>>,
 }
 
 impl<State> Default for EventManager<State> {
     fn default() -> Self {
         Self {
+            widget_to_types: Default::default(),
             types: Default::default(),
         }
     }
@@ -29,6 +31,10 @@ impl<State: 'static> EventManager<State> {
         f: impl for<'a> WidgetEventFn<State, <E::Event as Event>::Data<'a>, W>,
     ) {
         self.get_type::<E>().register(id, event, f);
+        self.widget_to_types
+            .entry(id.id())
+            .or_default()
+            .insert(Self::type_key::<E>());
     }
 
     pub fn type_key<E: EventLike>() -> TypeId {
@@ -38,25 +44,25 @@ impl<State: 'static> EventManager<State> {
 
 pub trait EventsLike {
     fn remove(&mut self, id: WidgetId);
-    fn draw(&mut self, data: &WidgetData, active: &ActiveData);
-    fn undraw(&mut self, data: &WidgetData, active: &ActiveData);
+    fn draw(&mut self, active: &ActiveData);
+    fn undraw(&mut self, active: &ActiveData);
 }
 
 impl<State: 'static> EventsLike for EventManager<State> {
     fn remove(&mut self, id: WidgetId) {
-        for m in self.types.values_mut() {
-            m.remove(id);
+        for t in self.widget_to_types.get(&id).into_flat_iter() {
+            self.types.get_mut(t).unwrap().remove(id);
         }
     }
 
-    fn draw(&mut self, data: &WidgetData, active: &ActiveData) {
-        for t in &data.event_mgrs {
+    fn draw(&mut self, active: &ActiveData) {
+        for t in self.widget_to_types.get(&active.id).into_flat_iter() {
             self.types.get_mut(t).unwrap().draw(active);
         }
     }
 
-    fn undraw(&mut self, data: &WidgetData, active: &ActiveData) {
-        for t in &data.event_mgrs {
+    fn undraw(&mut self, active: &ActiveData) {
+        for t in self.widget_to_types.get(&active.id).into_flat_iter() {
             self.types.get_mut(t).unwrap().undraw(active);
         }
     }

core/src/event/rsc.rs

@@ -25,12 +25,6 @@ pub trait HasEvents: Sized + HasState + HasUi {
         Self::State: 'static,
     {
         self.events_mut().register(id, event, f);
-        self.ui_mut()
-            .widgets
-            .data_mut(id)
-            .unwrap()
-            .event_mgrs
-            .insert(EventManager::<Self::State>::type_key::<E>());
     }
 }
 

core/src/lib.rs

@@ -11,6 +11,7 @@
 #![feature(associated_type_defaults)]
 #![feature(unsize)]
 #![feature(coerce_unsized)]
+#![feature(option_into_flat_iter)]
 
 mod attr;
 mod event;

core/src/ui/draw_state.rs

@@ -80,9 +80,8 @@ impl<'a> DrawState<'a> {
 
     pub fn redraw_all(&mut self) {
         // free all resources & cache
-        for (id, active) in self.ui.active.drain() {
-            let data = self.ui.widgets.data(id).unwrap();
-            self.events.undraw(data, &active);
+        for (_, active) in self.ui.active.drain() {
+            self.events.undraw(&active);
         }
         self.ui.cache.clear();
         self.ui.free(self.events);
@@ -170,8 +169,7 @@ impl<'a> DrawState<'a> {
         }
 
         // update modules
-        let data = self.ui.widgets.data(id).unwrap();
-        self.events.draw(data, &active);
+        self.events.draw(&active);
         self.active.insert(id, active);
     }
 
@@ -202,8 +200,7 @@ impl<'a> DrawState<'a> {
             active.textures.clear();
             self.textures.free();
             if undraw {
-                let data = self.ui.widgets.data(id).unwrap();
-                self.events.undraw(data, active);
+                self.events.undraw(active);
             }
         }
         active

core/src/widget/data.rs

@@ -1,11 +1,8 @@
-use std::any::TypeId;
-
-use crate::{Widget, util::HashSet};
+use crate::Widget;
 
 pub struct WidgetData {
     pub widget: Box<dyn Widget>,
     pub label: String,
-    pub event_mgrs: HashSet<TypeId>,
     /// dynamic borrow checking
     pub borrowed: bool,
 }
@@ -20,7 +17,6 @@ impl WidgetData {
             widget: Box::new(widget),
             label,
             borrowed: false,
-            event_mgrs: Default::default(),
         }
     }
 }