trust + fix redraw bug

core/src/ui/draw_state.rs

@@ -1,6 +1,7 @@
 use crate::{
-    ActiveData, Axis, Painter, SizeCtx, Ui, UiRegion, UiVec2, WidgetId, render::MaskIdx,
-    util::HashSet,
+    ActiveData, Axis, Painter, SizeCtx, Ui, UiRegion, UiVec2, WidgetId,
+    render::MaskIdx,
+    util::{HashSet, forget_ref},
 };
 use std::ops::{Deref, DerefMut};
 
@@ -30,9 +31,7 @@ impl<'a, State: 'static> DrawState<'a, State> {
     /// will just return if so
     pub fn redraw(&mut self, id: WidgetId) {
         self.widgets.needs_redraw.remove(&id);
-        if self.draw_started.contains(&id) {
-            return;
-        }
+        self.draw_started.remove(&id);
         // check if parent depends on the desired size of this, if so then redraw it first
         for axis in [Axis::X, Axis::Y] {
             if let Some(&(outer, old)) = self.cache.size.axis_dyn(axis).get(&id)
@@ -202,11 +201,10 @@ impl<'a, State: 'static> DrawState<'a, State> {
             *region = region.outside(&from).within(&to);
         }
         active.region = active.region.outside(&from).within(&to);
-        // children will not be changed, so this technically should not be needed
-        // probably need unsafe
-        let children = active.children.clone();
+        // SAFETY: children cannot be recursive
+        let children = unsafe { forget_ref(&active.children) };
         for child in children {
-            self.mov(child, from, to);
+            self.mov(*child, from, to);
         }
     }