sensors now run in correct order

src/layout/sense.rs

@@ -1,6 +1,6 @@
 use crate::{
     layout::{Ui, UiRegion, Vec2},
-    util::{HashMap, Id, bitflags},
+    util::{HashMap, Id, IdVec, bitflags},
 };
 
 bitflags!(Sense, Senses, senses {
@@ -34,7 +34,7 @@ pub struct Sensor<Ctx> {
 }
 
 pub type SensorMap<Ctx> = HashMap<Id, SensorGroup<Ctx>>;
-pub type ActiveSensors = HashMap<Id, SenseShape>;
+pub type ActiveSensors = IdVec<SenseShape>;
 pub type SenseShape = UiRegion;
 pub struct SensorGroup<Ctx> {
     pub hover: ActivationState,
@@ -59,15 +59,17 @@ pub trait UiCtx {
 pub fn run_sensors<Ctx: UiCtx>(ctx: &mut Ctx, cursor: &CursorState, window_size: Vec2) {
     let active = std::mem::take(&mut ctx.ui().active.sensors);
     let mut map = std::mem::take(&mut ctx.ui().sensor_map);
-    for (id, shape) in active.iter() {
+    for (id, shape) in active.iter().rev() {
         let group = &mut map.get_mut(id).unwrap();
         let region = shape.to_screen(window_size);
         let in_shape = cursor.exists && region.contains(cursor.pos);
         group.hover.update(in_shape);
         group.cursor.update(cursor.pressed && in_shape);
 
+        let mut ran = false;
         for sensor in &mut group.sensors {
             if should_run(sensor.senses, group.cursor, group.hover) {
+                ran = true;
                 let sctx = SenseCtx {
                     cursor: cursor.pos - region.top_left,
                     size: region.bot_right - region.top_left,
@@ -75,6 +77,9 @@ pub fn run_sensors<Ctx: UiCtx>(ctx: &mut Ctx, cursor: &CursorState, window_size:
                 (sensor.f)(ctx, sctx);
             }
         }
+        if ran {
+            break;
+        }
     }
     ctx.ui().sensor_map = map;
     ctx.ui().active.sensors = active;