move event data out of widgetdata

src/default/sense.rs

@@ -148,7 +148,7 @@ impl<State: RunEvents> SensorUi<State> for State {
         let mut active = std::mem::take(&mut self.events_mut().get_type::<CursorSense>().active);
         for layer in layers.indices().rev() {
             let mut sensed = false;
-            for (id, sensor) in active.get_mut(&layer).into_iter().flatten() {
+            for (id, sensor) in active.get_mut(&layer).into_flat_iter() {
                 let shape = self.ui().active.get(id).unwrap().region;
                 let region = shape.to_px(window_size);
                 let in_shape = cursor.exists && region.contains(cursor.pos);

src/lib.rs

@@ -3,6 +3,7 @@
 #![feature(gen_blocks)]
 #![feature(associated_type_defaults)]
 #![feature(unsize)]
+#![feature(option_into_flat_iter)]
 
 pub mod default;
 pub mod event;