proper widgetid + slot vec instead of map

src/widget/sense.rs

@@ -1,5 +1,5 @@
 use crate::prelude::*;
-use iris_core::util::{HashMap, Id};
+use iris_core::util::HashMap;
 use std::{
     ops::{BitOr, Deref, DerefMut},
     rc::Rc,
@@ -97,7 +97,7 @@ pub struct Sensor<Ctx, Data> {
     pub f: Rc<dyn EventFn<Ctx, Data>>,
 }
 
-pub type SensorMap<Ctx, Data> = HashMap<Id, SensorGroup<Ctx, Data>>;
+pub type SensorMap<Ctx, Data> = HashMap<WidgetId, SensorGroup<Ctx, Data>>;
 pub type SenseShape = UiRegion;
 pub struct SensorGroup<Ctx, Data> {
     pub hover: ActivationState,
@@ -116,7 +116,7 @@ pub struct CursorData {
 
 pub struct CursorModule<Ctx> {
     map: SensorMap<Ctx, CursorData>,
-    active: HashMap<usize, HashMap<Id, SenseShape>>,
+    active: HashMap<usize, HashMap<WidgetId, SenseShape>>,
 }
 
 impl<Ctx: 'static> UiModule for CursorModule<Ctx> {
@@ -135,10 +135,10 @@ impl<Ctx: 'static> UiModule for CursorModule<Ctx> {
         }
     }
 
-    fn on_remove(&mut self, id: &Id) {
-        self.map.remove(id);
+    fn on_remove(&mut self, id: WidgetId) {
+        self.map.remove(&id);
         for layer in self.active.values_mut() {
-            layer.remove(id);
+            layer.remove(&id);
         }
     }
 
@@ -301,7 +301,7 @@ impl Event for CursorSense {
 impl<E: Event<Data = <CursorSenses as Event>::Data> + Into<CursorSenses>, Ctx: 'static>
     EventModule<E, Ctx> for CursorModule<Ctx>
 {
-    fn register(&mut self, id: Id, senses: E, f: impl EventFn<Ctx, <E as Event>::Data>) {
+    fn register(&mut self, id: WidgetId, senses: E, f: impl EventFn<Ctx, <E as Event>::Data>) {
         // TODO: does not add to active if currently active
         self.map.entry(id).or_default().sensors.push(Sensor {
             senses: senses.into(),
@@ -311,11 +311,11 @@ impl<E: Event<Data = <CursorSenses as Event>::Data> + Into<CursorSenses>, Ctx: '
 
     fn run<'a>(
         &self,
-        id: &Id,
+        id: WidgetId,
         event: E,
     ) -> Option<impl Fn(EventCtx<Ctx, <E as Event>::Data>) + use<'a, E, Ctx>> {
         let senses = event.into();
-        if let Some(group) = self.map.get(id) {
+        if let Some(group) = self.map.get(&id) {
             let fs: Vec<_> = group
                 .sensors
                 .iter()