I forgot why I did it the other way lol (revert)

src/core/frame.rs

@@ -6,7 +6,7 @@ pub struct Regioned {
 }
 
 impl<Ctx: 'static> Widget<Ctx> for Regioned {
-    fn draw(&self, mut painter: Painter<Ctx>) {
+    fn draw(&self, painter: &mut Painter<Ctx>) {
         painter.draw_within(&self.inner, self.region);
     }
 }

src/core/image.rs

@@ -7,7 +7,7 @@ pub struct Image {
 }
 
 impl<Ctx> Widget<Ctx> for Image {
-    fn draw(&self, mut painter: Painter<Ctx>) {
+    fn draw(&self, painter: &mut Painter<Ctx>) {
         if let Some(handle) = &self.handle {
             painter.draw_texture(handle);
         } else {

src/core/rect.rs

@@ -28,7 +28,7 @@ impl Rect {
 }
 
 impl<Ctx> Widget<Ctx> for Rect {
-    fn draw(&self, mut painter: Painter<Ctx>) {
+    fn draw(&self, painter: &mut Painter<Ctx>) {
         painter.write(RectPrimitive {
             color: self.color,
             radius: self.radius,

src/core/span.rs

@@ -6,7 +6,7 @@ pub struct Span {
 }
 
 impl<Ctx: 'static> Widget<Ctx> for Span {
-    fn draw(&self, mut painter: Painter<Ctx>) {
+    fn draw(&self, painter: &mut Painter<Ctx>) {
         let total = self.sums();
         let mut start = UIScalar::min();
         for (child, length) in &self.children {

src/core/stack.rs

@@ -5,7 +5,7 @@ pub struct Stack {
 }
 
 impl<Ctx> Widget<Ctx> for Stack {
-    fn draw(&self, mut painter: Painter<Ctx>) {
+    fn draw(&self, painter: &mut Painter<Ctx>) {
         for child in &self.children {
             painter.draw(child);
         }

src/layout/painter.rs

@@ -60,20 +60,22 @@ impl<'a, Ctx> Painter<'a, Ctx> {
         if self.sensors_map.get(&id.id).is_some() {
             self.active_sensors.push((region, id.id.duplicate()));
         }
-        self.nodes.get_dyn(id).draw(Painter {
-            nodes: self.nodes,
-            ctx: self.ctx,
-            sensors_map: self.sensors_map,
-            active_sensors: self.active_sensors,
-            primitives: self.primitives,
-            region,
-        });
+        // &mut self is passed to avoid copying all of the "static" pointers in self
+        // so need to save non static data here
+        let old = self.region;
+        self.region = region;
+        self.nodes.get_dyn(id).draw(self);
+        self.region = old;
     }
 
     pub fn draw_texture(&mut self, handle: &TextureHandle) {
         self.write(handle.inner);
     }
 
+    pub fn region(&self) -> UiRegion {
+        self.region
+    }
+
     pub fn ctx(&mut self) -> &mut Ctx {
         self.ctx
     }

src/layout/widget.rs

@@ -2,7 +2,7 @@ use crate::{Painter, Ui, WidgetId, WidgetIdFnRet};
 use std::{any::Any, marker::PhantomData};
 
 pub trait Widget<Ctx>: Any {
-    fn draw(&self, painter: Painter<Ctx>);
+    fn draw(&self, painter: &mut Painter<Ctx>);
 }
 
 pub struct WidgetTag;