diff --git a/core/src/event/ctx.rs b/core/src/event/ctx.rs
index 0997e1f..f5894a9 100644
--- a/core/src/event/ctx.rs
+++ b/core/src/event/ctx.rs
@@ -13,6 +13,6 @@ pub struct EventIdCtx<'a, Rsc: HasEvents, Data, W: ?Sized> {
 
 impl<Rsc: HasEvents, Data, W: Widget> EventIdCtx<'_, Rsc, Data, W> {
     pub fn widget<'a>(&self, rsc: &'a mut Rsc) -> &'a mut W {
-        &mut rsc.widgets_mut()[self.widget]
+        &mut rsc.ui_mut().widgets[self.widget]
     }
 }
diff --git a/core/src/event/manager.rs b/core/src/event/manager.rs
index 6896478..1a315a6 100644
--- a/core/src/event/manager.rs
+++ b/core/src/event/manager.rs
@@ -1,6 +1,6 @@
 use crate::{
     ActiveData, Event, EventCtx, EventFn, EventIdCtx, EventLike, HasEvents, IdLike, LayerId,
-    Widget, WidgetEventFn, WidgetId, WeakWidget,
+    WeakWidget, Widget, WidgetEventFn, WidgetId,
     util::{HashMap, HashSet, TypeMap},
 };
 use std::{any::TypeId, rc::Rc};
@@ -28,7 +28,7 @@ impl<Rsc: HasEvents + 'static> EventManager<Rsc> {
         &mut self,
         id: WeakWidget<W>,
         event: E,
-        f: impl WidgetEventFn<Rsc, <E::Event as Event>::Data, W>,
+        f: impl for<'a> WidgetEventFn<Rsc, <E::Event as Event>::Data<'a>, W>,
     ) {
         self.get_type::<E>().register(id, event, f);
         self.widget_to_types
@@ -74,7 +74,7 @@ pub trait EventManagerLike<State> {
     fn undraw(&mut self, data: &ActiveData);
 }
 
-type EventData<Rsc, E> = (E, Rc<dyn EventFn<Rsc, <E as Event>::Data>>);
+type EventData<Rsc, E> = (E, Rc<dyn for<'a> EventFn<Rsc, <E as Event>::Data<'a>>>);
 pub struct TypeEventManager<Rsc: HasEvents, E: Event> {
     // TODO: reduce visiblity!!
     pub active: HashMap<LayerId, HashMap<WidgetId, E::State>>,
@@ -116,7 +116,7 @@ impl<Rsc: HasEvents + 'static, E: Event> TypeEventManager<Rsc, E> {
         &mut self,
         widget: WeakWidget<W>,
         event: impl EventLike<Event = E>,
-        f: impl WidgetEventFn<Rsc, E::Data, W>,
+        f: impl for<'a> WidgetEventFn<Rsc, E::Data<'a>, W>,
     ) {
         let event = event.into_event();
         self.map.entry(widget.id()).or_default().push((
@@ -137,7 +137,7 @@ impl<Rsc: HasEvents + 'static, E: Event> TypeEventManager<Rsc, E> {
     pub fn run_fn<'a>(
         &mut self,
         id: impl IdLike,
-    ) -> impl FnOnce(EventCtx<'_, Rsc, E::Data>, &mut Rsc) + 'a {
+    ) -> impl for<'b> FnOnce(EventCtx<'_, Rsc, E::Data<'b>>, &mut Rsc) + 'a {
         let fs = self.map.get(&id.id()).cloned().unwrap_or_default();
         move |ctx, rsc| {
             for (e, f) in fs {
diff --git a/core/src/event/mod.rs b/core/src/event/mod.rs
index 4010969..7b038f4 100644
--- a/core/src/event/mod.rs
+++ b/core/src/event/mod.rs
@@ -7,10 +7,10 @@ pub use manager::*;
 pub use rsc::*;
 
 pub trait Event: Sized + 'static + Clone {
-    type Data: Clone = ();
+    type Data<'a>: Clone = ();
     type State: Default = ();
     #[allow(unused_variables)]
-    fn should_run(&self, data: &Self::Data) -> Option<Self::Data> {
+    fn should_run<'a>(&self, data: &Self::Data<'a>) -> Option<Self::Data<'a>> {
         Some(data.clone())
     }
 }
diff --git a/core/src/event/rsc.rs b/core/src/event/rsc.rs
index bcd174f..4824a99 100644
--- a/core/src/event/rsc.rs
+++ b/core/src/event/rsc.rs
@@ -1,5 +1,5 @@
 use crate::{
-    Event, EventCtx, EventLike, EventManager, IdLike, UiRsc, Widget, WidgetEventFn, WeakWidget,
+    Event, EventCtx, EventLike, EventManager, IdLike, UiRsc, WeakWidget, Widget, WidgetEventFn,
 };
 
 pub trait HasState: 'static {
@@ -14,7 +14,7 @@ pub trait HasEvents: Sized + UiRsc + HasState {
         &mut self,
         id: WeakWidget<W>,
         event: E,
-        f: impl WidgetEventFn<Self, <E::Event as Event>::Data, W>,
+        f: impl for<'a> WidgetEventFn<Self, <E::Event as Event>::Data<'a>, W>,
     ) {
         self.events_mut().register(id, event, f);
     }
@@ -24,7 +24,7 @@ pub trait RunEvents: HasEvents {
     fn run_event<E: EventLike>(
         &mut self,
         id: impl IdLike,
-        data: <E::Event as Event>::Data,
+        data: <E::Event as Event>::Data<'_>,
         state: &mut Self::State,
     ) {
         let f = self.events_mut().get_type::<E>().run_fn(id);
diff --git a/core/src/primitive/mod.rs b/core/src/primitive/mod.rs
index 7d81635..8284a05 100644
--- a/core/src/primitive/mod.rs
+++ b/core/src/primitive/mod.rs
@@ -7,12 +7,3 @@ pub use color::*;
 pub use layer::*;
 pub use text::*;
 pub use texture::*;
-
-use crate::{Mask, util::TrackedArena};
-
-#[derive(Default)]
-pub struct PainterData {
-    pub textures: Textures,
-    pub text: TextData,
-    pub masks: TrackedArena<Mask, u32>,
-}
diff --git a/core/src/render/mod.rs b/core/src/render/mod.rs
index 65ad0a1..1695efa 100644
--- a/core/src/render/mod.rs
+++ b/core/src/render/mod.rs
@@ -1,7 +1,7 @@
 use std::num::NonZero;
 
 use crate::{
-    Textures, UiRenderState,
+    UiData, UiRenderState,
     render::{data::PrimitiveInstance, texture::GpuTextures, util::ArrBuf},
     util::HashMap,
 };
@@ -63,14 +63,14 @@ impl UiRenderNode {
         &mut self,
         device: &Device,
         queue: &Queue,
-        ui: &mut UiRenderState,
-        textures: &mut Textures,
+        ui: &mut UiData,
+        ui_render: &mut UiRenderState,
     ) {
         self.active.clear();
-        for (i, primitives) in ui.layers.iter_mut() {
+        for (i, primitives) in ui_render.layers.iter_mut() {
             self.active.push(i);
             for change in primitives.apply_free() {
-                if let Some(inst) = ui.active.get_mut(&change.id) {
+                if let Some(inst) = ui_render.active.get_mut(&change.id) {
                     for h in &mut inst.primitives {
                         if h.layer == i && h.inst_idx == change.old {
                             h.inst_idx = change.new;
@@ -107,7 +107,7 @@ impl UiRenderNode {
             }
         }
         let mut changed = false;
-        changed |= self.textures.update(textures);
+        changed |= self.textures.update(&mut ui.textures);
         if ui.masks.changed {
             ui.masks.changed = false;
             self.masks.update(device, queue, &ui.masks[..]);
diff --git a/core/src/ui/draw_state.rs b/core/src/ui/draw_state.rs
index 02b1d19..ffd6bc1 100644
--- a/core/src/ui/draw_state.rs
+++ b/core/src/ui/draw_state.rs
@@ -1,6 +1,6 @@
 use crate::{
-    ActiveData, Axis, EventsLike, Painter, PainterData, SizeCtx, StrongWidget, UiRegion,
-    UiRenderState, UiVec2, WidgetId, Widgets,
+    ActiveData, Axis, EventsLike, Painter, SizeCtx, StrongWidget, UiRegion, UiRenderState, UiVec2,
+    WidgetId, Widgets,
     render::MaskIdx,
     util::{HashSet, forget_ref},
 };
@@ -16,30 +16,6 @@ pub struct Drawer<'a> {
 }
 
 impl<'a> Drawer<'a> {
-    pub fn new(
-        widgets: &'a mut Widgets,
-        data: &'a mut PainterData,
-        render: &'a mut UiRenderState,
-        events: &'a mut dyn EventsLike,
-        root: Option<&'a StrongWidget>,
-    ) -> Self {
-        Self {
-            widgets,
-            data,
-            events,
-            render,
-            root,
-            draw_started: Default::default(),
-        }
-    }
-
-    pub fn redraw_updates(&mut self) {
-        while let Some(&id) = self.widgets.needs_redraw.iter().next() {
-            self.redraw(id);
-        }
-        self.ui.free(self.events);
-    }
-
     /// redraws a widget that's currently active (drawn)
     pub fn redraw(&mut self, id: WidgetId) {
         self.widgets.needs_redraw.remove(&id);
@@ -94,21 +70,6 @@ impl<'a> Drawer<'a> {
         }
     }
 
-    pub fn redraw_all(&mut self) {
-        // free all resources & cache
-        for (_, active) in self.render.active.drain() {
-            self.events.undraw(&active);
-        }
-        self.render.cache.clear();
-        self.ui.free(self.events);
-        self.render.layers.clear();
-        self.widgets.needs_redraw.clear();
-
-        if let Some(id) = self.root {
-            self.draw_inner(0, id.id(), UiRegion::FULL, None, MaskIdx::NONE, None);
-        }
-    }
-
     pub(super) fn draw_inner(
         &mut self,
         layer: usize,
diff --git a/core/src/ui/mod.rs b/core/src/ui/mod.rs
index f6eaf77..ad07b6d 100644
--- a/core/src/ui/mod.rs
+++ b/core/src/ui/mod.rs
@@ -1,8 +1,8 @@
-use crate::{WeakWidget, Widget, Widgets};
+use crate::{Mask, TextData, Textures, WeakWidget, WidgetId, Widgets, util::TrackedArena};
 
 mod active;
 mod cache;
-mod draw_state;
+// mod draw_state;
 mod painter;
 mod render_state;
 mod size;
@@ -13,10 +13,37 @@ pub use painter::Painter;
 pub use render_state::*;
 pub use size::*;
 
-pub struct Ui {}
-
-pub trait UiRsc: Sized {
-    fn add_widget<W: Widget>(&mut self, widget: W) -> WeakWidget<W>;
-    fn widgets(&self) -> &Widgets;
-    fn widgets_mut(&mut self) -> &mut Widgets;
+#[derive(Default)]
+pub struct UiData {
+    pub widgets: Widgets,
+    pub textures: Textures,
+    pub text: TextData,
+    pub masks: TrackedArena<Mask, u32>,
+}
+
+pub trait UiRsc {
+    fn ui(&self) -> &UiData;
+    fn ui_mut(&mut self) -> &mut UiData;
+
+    #[allow(unused_variables)]
+    fn on_add(&mut self, id: WeakWidget) {}
+    #[allow(unused_variables)]
+    fn on_remove(&mut self, id: WidgetId) {}
+    #[allow(unused_variables)]
+    fn on_draw(&mut self, active: &ActiveData) {}
+    #[allow(unused_variables)]
+    fn on_undraw(&mut self, active: &ActiveData) {}
+
+    fn widgets(&self) -> &Widgets {
+        &self.ui().widgets
+    }
+    fn widgets_mut(&mut self) -> &mut Widgets {
+        &mut self.ui_mut().widgets
+    }
+    fn free(&mut self) {
+        while let Some(id) = self.widgets_mut().free_next() {
+            self.on_remove(id);
+        }
+        self.ui_mut().textures.free();
+    }
 }
diff --git a/core/src/ui/painter.rs b/core/src/ui/painter.rs
index e48c774..f7f4939 100644
--- a/core/src/ui/painter.rs
+++ b/core/src/ui/painter.rs
@@ -1,14 +1,14 @@
 use crate::{
     Axis, Len, RenderedText, Size, SizeCtx, StrongWidget, TextAttrs, TextBuffer, TextData,
-    TextureHandle, UiRegion, Widget, WidgetId,
+    TextureHandle, UiRegion, UiRenderState, UiRsc, Widget, WidgetId,
     render::{Mask, MaskIdx, Primitive, PrimitiveHandle, PrimitiveInst},
-    ui::draw_state::Drawer,
     util::Vec2,
 };
 
 /// makes your surfaces look pretty
-pub struct Painter<'a, 'b> {
-    pub(super) drawer: &'a mut Drawer<'b>,
+pub struct Painter<'a> {
+    pub(super) state: &'a mut UiRenderState,
+    pub(super) rsc: &'a mut dyn UiRsc,
 
     pub(super) region: UiRegion,
     pub(super) mask: MaskIdx,
@@ -19,9 +19,9 @@ pub struct Painter<'a, 'b> {
     pub(super) id: WidgetId,
 }
 
-impl<'a, 'c> Painter<'a, 'c> {
+impl<'a> Painter<'a> {
     fn primitive_at<P: Primitive>(&mut self, primitive: P, region: UiRegion) {
-        let h = self.drawer.layers.write(
+        let h = self.state.layers.write(
             self.layer,
             PrimitiveInst {
                 id: self.id,
@@ -32,7 +32,7 @@ impl<'a, 'c> Painter<'a, 'c> {
         );
         if self.mask != MaskIdx::NONE {
             // TODO: I have no clue if this works at all :joy:
-            self.drawer.masks.push_ref(self.mask);
+            self.rsc.ui_mut().masks.push_ref(self.mask);
         }
         self.primitives.push(h);
     }
@@ -48,7 +48,7 @@ impl<'a, 'c> Painter<'a, 'c> {
 
     pub fn set_mask(&mut self, region: UiRegion) {
         assert!(self.mask == MaskIdx::NONE);
-        self.mask = self.drawer.masks.push(Mask { region });
+        self.mask = self.rsc.ui_mut().masks.push(Mask { region });
     }
 
     /// Draws a widget within this widget's region.
@@ -64,8 +64,15 @@ impl<'a, 'c> Painter<'a, 'c> {
 
     fn widget_at<W: ?Sized>(&mut self, id: &StrongWidget<W>, region: UiRegion) {
         self.children.push(id.id());
-        self.drawer
-            .draw_inner(self.layer, id.id(), region, Some(self.id), self.mask, None);
+        self.state.draw_inner(
+            self.layer,
+            id.id(),
+            region,
+            Some(self.id),
+            self.mask,
+            None,
+            self.rsc,
+        );
     }
 
     pub fn texture_within(&mut self, handle: &TextureHandle, region: UiRegion) {
@@ -85,10 +92,8 @@ impl<'a, 'c> Painter<'a, 'c> {
 
     /// returns (handle, offset from top left)
     pub fn render_text(&mut self, buffer: &mut TextBuffer, attrs: &TextAttrs) -> RenderedText {
-        self.drawer
-            .ui
-            .text
-            .draw(buffer, attrs, &mut self.drawer.ui.textures)
+        let ui = self.rsc.ui_mut();
+        ui.text.draw(buffer, attrs, &mut ui.textures)
     }
 
     pub fn region(&self) -> UiRegion {
@@ -107,27 +112,27 @@ impl<'a, 'c> Painter<'a, 'c> {
     }
 
     pub fn output_size(&self) -> Vec2 {
-        self.drawer.output_size
+        self.state.output_size
     }
 
     pub fn px_size(&mut self) -> Vec2 {
-        self.region.size().to_abs(self.drawer.output_size)
+        self.region.size().to_abs(self.state.output_size)
     }
 
     pub fn text_data(&mut self) -> &mut TextData {
-        &mut self.drawer.text
+        &mut self.rsc.ui_mut().text
     }
 
     pub fn child_layer(&mut self) {
-        self.layer = self.drawer.layers.child(self.layer);
+        self.layer = self.state.layers.child(self.layer);
     }
 
     pub fn next_layer(&mut self) {
-        self.layer = self.drawer.layers.next(self.layer);
+        self.layer = self.state.layers.next(self.layer);
     }
 
     pub fn label(&self) -> &str {
-        &self.drawer.widgets.data(self.id).unwrap().label
+        &self.rsc.widgets().data(self.id).unwrap().label
     }
 
     pub fn id(&self) -> &WidgetId {
@@ -135,6 +140,6 @@ impl<'a, 'c> Painter<'a, 'c> {
     }
 
     pub fn size_ctx(&mut self) -> SizeCtx<'_> {
-        self.drawer.size_ctx(self.id, self.region.size())
+        self.state.size_ctx(self.id, self.region.size(), self.rsc)
     }
 }
diff --git a/core/src/ui/render_state.rs b/core/src/ui/render_state.rs
index aad10dd..57e79a6 100644
--- a/core/src/ui/render_state.rs
+++ b/core/src/ui/render_state.rs
@@ -1,7 +1,8 @@
 use crate::{
-    ActiveData, EventsLike, IdLike, PixelRegion, PrimitiveLayers, StrongWidget, WidgetId, Widgets,
-    ui::{cache::Cache, draw_state::Drawer},
-    util::{HashMap, Vec2},
+    ActiveData, Axis, IdLike, MaskIdx, Painter, PixelRegion, PrimitiveLayers, SizeCtx,
+    StrongWidget, UiRegion, UiRsc, UiVec2, WidgetId, Widgets,
+    ui::cache::Cache,
+    util::{HashMap, HashSet, Vec2, forget_ref},
 };
 
 pub struct UiRenderState {
@@ -12,6 +13,7 @@ pub struct UiRenderState {
 
     old_root: Option<WidgetId>,
     resized: bool,
+    draw_started: HashSet<WidgetId>,
 }
 
 impl UiRenderState {
@@ -23,6 +25,7 @@ impl UiRenderState {
             output_size: Vec2::ZERO,
             old_root: None,
             resized: false,
+            draw_started: Default::default(),
         }
     }
 
@@ -31,15 +34,11 @@ impl UiRenderState {
         self.resized = true;
     }
 
-    pub fn update<'a>(
-        &mut self,
-        root: impl Into<Option<&'a StrongWidget>>,
-        widgets: &mut Widgets,
-        events: &mut dyn EventsLike,
-    ) {
+    pub fn update<'a>(&mut self, root: impl Into<Option<&'a StrongWidget>>, rsc: &mut dyn UiRsc) {
         // safety mechanism for memory leaks; might wanna return a result instead so user can
         // decide whether to panic or not
-        if !widgets.waiting.is_empty() {
+        if !rsc.widgets().waiting.is_empty() {
+            let widgets = rsc.widgets();
             let len = widgets.waiting.len();
             let all: Vec<_> = widgets
                 .waiting
@@ -52,18 +51,169 @@ impl UiRenderState {
                 weak widgets: {all:#?}"
             );
         }
-        if self.root_changed(root) {
-            Drawer::new(self, events).redraw_all();
-            self.old_root = root.into().map(|r| r.id());
-        } else if widgets.has_updates() {
-            Drawer::new(self, events).redraw_updates();
-        }
-        if self.resized {
+        let root = root.into();
+        if self.root_changed(root) || self.resized {
+            self.redraw_all(root, rsc);
+            self.old_root = root.map(|r| r.id());
             self.resized = false;
-            Drawer::new(self, events).redraw_all();
+        } else if rsc.widgets().has_updates() {
+            self.redraw_updates(rsc);
         }
     }
 
+    fn redraw_all(&mut self, root: Option<&StrongWidget>, rsc: &mut dyn UiRsc) {
+        self.clear(rsc);
+        // free all resources & cache
+        if let Some(id) = root {
+            self.draw_inner(0, id.id(), UiRegion::FULL, None, MaskIdx::NONE, None, rsc);
+        }
+    }
+
+    // TODO: should prolly make a DrawInfo struct or smth for everything other than rsc
+    #[allow(clippy::too_many_arguments)]
+    pub(super) fn draw_inner(
+        &mut self,
+        layer: usize,
+        id: WidgetId,
+        region: UiRegion,
+        parent: Option<WidgetId>,
+        mask: MaskIdx,
+        old_children: Option<Vec<WidgetId>>,
+        rsc: &mut dyn UiRsc,
+    ) {
+        let mut old_children = old_children.unwrap_or_default();
+        if let Some(active) = self.active.get_mut(&id)
+            && !rsc.widgets().needs_redraw.contains(&id)
+        {
+            // check to see if we can skip drawing first
+            if active.region == region {
+                return;
+            } else if active.region.size() == region.size() {
+                // TODO: epsilon?
+                let from = active.region;
+                self.mov(id, from, region);
+                return;
+            }
+            // if not, then maintain resize and track old children to remove unneeded
+            let active = self.remove(id, false, rsc).unwrap();
+            old_children = active.children;
+        }
+
+        // draw widget
+        self.draw_started.insert(id);
+
+        let mut painter = Painter {
+            state: self,
+            region,
+            mask,
+            layer,
+            id,
+            textures: Vec::new(),
+            primitives: Vec::new(),
+            children: Vec::new(),
+            rsc,
+        };
+
+        let mut widget = painter.rsc.widgets().get_dyn_dynamic(id);
+        widget.draw(&mut painter);
+        drop(widget);
+
+        let Painter {
+            state: _,
+            rsc: _,
+            region,
+            mask,
+            textures,
+            primitives,
+            children,
+            layer,
+            id,
+        } = painter;
+
+        // add to active
+        let active = ActiveData {
+            id,
+            region,
+            parent,
+            textures,
+            primitives,
+            children,
+            mask,
+            layer,
+        };
+
+        // remove old children that weren't kept
+        for c in &old_children {
+            if !active.children.contains(c) {
+                self.remove_rec(*c, rsc);
+            }
+        }
+
+        rsc.on_draw(&active);
+        self.active.insert(id, active);
+    }
+
+    fn mov(&mut self, id: WidgetId, from: UiRegion, to: UiRegion) {
+        let active = self.active.get_mut(&id).unwrap();
+        for h in &active.primitives {
+            let region = self.layers[h.layer].region_mut(h);
+            *region = region.outside(&from).within(&to);
+        }
+        active.region = active.region.outside(&from).within(&to);
+        // SAFETY: children cannot be recursive
+        let children = unsafe { forget_ref(&active.children) };
+        for child in children {
+            self.mov(*child, from, to);
+        }
+    }
+
+    /// NOTE: instance textures are cleared and self.textures freed
+    fn remove(&mut self, id: WidgetId, undraw: bool, rsc: &mut dyn UiRsc) -> Option<ActiveData> {
+        let mut active = self.active.remove(&id);
+        if let Some(active) = &mut active {
+            for h in &active.primitives {
+                let mask = self.layers.free(h);
+                if mask != MaskIdx::NONE {
+                    rsc.ui_mut().masks.remove(mask);
+                }
+            }
+            active.textures.clear();
+            rsc.ui_mut().textures.free();
+            if undraw {
+                rsc.on_undraw(active);
+            }
+        }
+        active
+    }
+
+    fn remove_rec(&mut self, id: WidgetId, rsc: &mut dyn UiRsc) -> Option<ActiveData> {
+        self.cache.remove(id);
+        let inst = self.remove(id, true, rsc);
+        if let Some(inst) = &inst {
+            for c in &inst.children {
+                self.remove_rec(*c, rsc);
+            }
+        }
+        inst
+    }
+
+    fn clear(&mut self, rsc: &mut dyn UiRsc) {
+        for (_, active) in self.active.drain() {
+            rsc.on_undraw(&active);
+        }
+        self.cache.clear();
+        self.layers.clear();
+        rsc.widgets_mut().needs_redraw.clear();
+        rsc.free();
+    }
+
+    pub fn redraw_updates(&mut self, rsc: &mut dyn UiRsc) {
+        while let Some(&id) = rsc.widgets().needs_redraw.iter().next() {
+            self.redraw(id, rsc);
+        }
+        rsc.free();
+    }
+
     pub fn root_changed<'a>(&self, root: impl Into<Option<&'a StrongWidget>>) -> bool {
         root.into().map(|r| r.id()) != self.old_root
     }
@@ -103,10 +253,63 @@ impl UiRenderState {
         let region = self.active.get(&id.id())?.region;
         Some(region.to_px(self.output_size))
     }
-}
 
-pub trait HasRoot {
-    fn set_root(&mut self, root: StrongWidget);
+    /// redraws a widget that's currently active (drawn)
+    pub fn redraw(&mut self, id: WidgetId, rsc: &mut dyn UiRsc) {
+        rsc.widgets_mut().needs_redraw.remove(&id);
+        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)
+                && let Some(current) = self.active.get(&id)
+                && let Some(pid) = current.parent
+            {
+                self.cache.size.axis_dyn(axis).remove(&id);
+                let new = self.size_ctx(id, outer, rsc).len_axis(id, axis);
+                self.cache.size.axis_dyn(axis).insert(id, (outer, new));
+                if new != old {
+                    self.redraw(pid, rsc);
+                }
+            }
+        }
+
+        if self.draw_started.contains(&id) {
+            return;
+        }
+
+        let Some(active) = self.remove(id, false, rsc) else {
+            return;
+        };
+
+        self.draw_inner(
+            active.layer,
+            id,
+            active.region,
+            active.parent,
+            active.mask,
+            Some(active.children),
+            rsc,
+        );
+    }
+
+    pub(super) fn size_ctx<'b>(
+        &'b mut self,
+        source: WidgetId,
+        outer: UiVec2,
+        rsc: &'b mut dyn UiRsc,
+    ) -> SizeCtx<'b> {
+        let ui = rsc.ui_mut();
+        SizeCtx {
+            source,
+            cache: &mut self.cache,
+            text: &mut ui.text,
+            textures: &mut ui.textures,
+            widgets: &ui.widgets,
+            outer,
+            output_size: self.output_size,
+            id: source,
+        }
+    }
 }
 
 impl Default for UiRenderState {
diff --git a/core/src/widget/like.rs b/core/src/widget/like.rs
index fe4b0ea..45512ae 100644
--- a/core/src/widget/like.rs
+++ b/core/src/widget/like.rs
@@ -1,4 +1,4 @@
-use crate::{HasRoot, UiRsc};
+use crate::UiRsc;
 
 use super::*;
 use std::marker::Unsize;
@@ -22,15 +22,16 @@ pub trait WidgetLike<Rsc: UiRsc, Tag>: Sized {
         }
     }
 
-    fn set_root(self, rsc: &mut Rsc)
-    where
-        Rsc: HasRoot,
-    {
+    fn set_root(self, rsc: &mut Rsc, root: &mut impl HasRoot) {
         let id = self.add_strong(rsc);
-        rsc.set_root(id);
+        root.set_root(id);
     }
 }
 
+pub trait HasRoot {
+    fn set_root(&mut self, root: StrongWidget);
+}
+
 pub trait WidgetArrLike<Rsc, const LEN: usize, Tag> {
     #[track_caller]
     fn add(self, state: &mut Rsc) -> WidgetArr<LEN>;
diff --git a/core/src/widget/tag.rs b/core/src/widget/tag.rs
index dc51221..1356dac 100644
--- a/core/src/widget/tag.rs
+++ b/core/src/widget/tag.rs
@@ -6,7 +6,9 @@ pub struct WidgetTag;
 impl<Rsc: UiRsc, W: Widget> WidgetLike<Rsc, WidgetTag> for W {
     type Widget = W;
     fn add(self, rsc: &mut Rsc) -> WeakWidget<W> {
-        rsc.add_widget(self)
+        let w = rsc.ui_mut().widgets.add_weak(self);
+        rsc.on_add(w);
+        w
     }
 }
 
diff --git a/core/src/widget/widgets.rs b/core/src/widget/widgets.rs
index 19ecbeb..6098aa6 100644
--- a/core/src/widget/widgets.rs
+++ b/core/src/widget/widgets.rs
@@ -104,10 +104,10 @@ impl Widgets {
         self.vec.get_mut(id.id())
     }
 
-    pub fn free(&mut self) {
-        for id in self.recv.try_iter() {
-            self.vec.free(id.id());
-        }
+    pub fn free_next(&mut self) -> Option<WidgetId> {
+        let next = self.recv.try_recv().ok()?;
+        self.vec.free(next);
+        Some(next)
     }
 
     #[allow(clippy::len_without_is_empty)]
diff --git a/examples/minimal.rs b/examples/minimal.rs
index bfdf031..e98ae5b 100644
--- a/examples/minimal.rs
+++ b/examples/minimal.rs
@@ -10,8 +10,12 @@ struct State {
 }
 
 impl DefaultAppState for State {
-    fn new(ui_state: DefaultUiState, rsc: &mut DefaultRsc<Self>, _: Proxy<Self::Event>) -> Self {
-        rect(Color::RED).set_root(rsc);
+    fn new(
+        mut ui_state: DefaultUiState,
+        rsc: &mut DefaultRsc<Self>,
+        _: Proxy<Self::Event>,
+    ) -> Self {
+        rect(Color::RED).set_root(rsc, &mut ui_state);
         Self { ui_state }
     }
 }
diff --git a/examples/tabs/main.rs b/examples/tabs/main.rs
index fa90797..d9789f1 100644
--- a/examples/tabs/main.rs
+++ b/examples/tabs/main.rs
@@ -16,7 +16,11 @@ pub struct Client {
 }
 
 impl DefaultAppState for Client {
-    fn new(ui_state: DefaultUiState, rsc: &mut DefaultRsc<Self>, _: Proxy<Self::Event>) -> Self {
+    fn new(
+        mut ui_state: DefaultUiState,
+        rsc: &mut DefaultRsc<Self>,
+        _: Proxy<Self::Event>,
+    ) -> Self {
         let rrect = rect(Color::WHITE).radius(20);
         let pad_test = (
             rrect.color(Color::BLUE),
@@ -197,20 +201,25 @@ impl DefaultAppState for Client {
 
         ((tabs.height(40), main.pad(10)).span(Dir::DOWN), info_sect)
             .stack()
-            .set_root(rsc);
+            .set_root(rsc, &mut ui_state);
 
         Self { ui_state, info }
     }
 
-    fn window_event(&mut self, _: WindowEvent, rsc: &mut DefaultRsc<Self>) {
+    fn window_event(
+        &mut self,
+        _: WindowEvent,
+        rsc: &mut DefaultRsc<Self>,
+        render: &mut UiRenderState,
+    ) {
         let new = format!(
             "widgets: {}\nactive: {}\nviews: {}",
-            rsc.ui.num_widgets(),
-            rsc.ui.active_widgets(),
-            self.ui_state.renderer.ui.view_count()
+            rsc.widgets().len(),
+            render.active_widgets(),
+            self.ui_state.renderer.ui.view_count(),
         );
-        if new != *rsc.ui[self.info].content {
-            *rsc.ui[self.info].content = new;
+        if new != *rsc.widgets()[self.info].content {
+            *rsc.widgets_mut()[self.info].content = new;
         }
     }
 }
diff --git a/examples/task.rs b/examples/task.rs
index 2dafebb..63e4d43 100644
--- a/examples/task.rs
+++ b/examples/task.rs
@@ -11,11 +11,15 @@ struct State {
 }
 
 impl DefaultAppState for State {
-    fn new(ui_state: DefaultUiState, rsc: &mut DefaultRsc<Self>, _: Proxy<Self::Event>) -> Self {
+    fn new(
+        mut ui_state: DefaultUiState,
+        rsc: &mut DefaultRsc<Self>,
+        _: Proxy<Self::Event>,
+    ) -> Self {
         let rect = rect(Color::RED).add(rsc);
         rect.task_on(CursorSense::click(), async move |mut ctx| {
             tokio::time::sleep(Duration::from_secs(1)).await;
-            ctx.task.update(move |_, rsc| {
+            ctx.update(move |_, rsc| {
                 let rect = rect(rsc);
                 if rect.color == Color::RED {
                     rect.color = Color::BLUE;
@@ -24,7 +28,7 @@ impl DefaultAppState for State {
                 }
             });
         })
-        .set_root(rsc);
+        .set_root(rsc, &mut ui_state);
         Self { ui_state }
     }
 }
diff --git a/examples/view.rs b/examples/view.rs
index 5557b72..ead842f 100644
--- a/examples/view.rs
+++ b/examples/view.rs
@@ -33,13 +33,17 @@ impl Test {
 }
 
 impl DefaultAppState for State {
-    fn new(ui_state: DefaultUiState, rsc: &mut DefaultRsc<Self>, _: Proxy<Self::Event>) -> Self {
+    fn new(
+        mut ui_state: DefaultUiState,
+        rsc: &mut DefaultRsc<Self>,
+        _: Proxy<Self::Event>,
+    ) -> Self {
         let test = Test::new(rsc);
 
         test.on(CursorSense::click(), move |_, rsc| {
             test.toggle(rsc);
         })
-        .set_root(rsc);
+        .set_root(rsc, &mut ui_state);
 
         Self { ui_state }
     }
diff --git a/src/default/attr.rs b/src/default/attr.rs
index f387d56..ff4e313 100644
--- a/src/default/attr.rs
+++ b/src/default/attr.rs
@@ -12,12 +12,20 @@ where
 
     fn run(rsc: &mut Rsc, container: WeakWidget<W>, id: Self::Input) {
         rsc.register_event(container, CursorSense::click_or_drag(), move |ctx, rsc| {
-            let region = rsc.ui().window_region(&id).unwrap();
+            let region = ctx.data.render.window_region(&id).unwrap();
             let id_pos = region.top_left;
-            let container_pos = rsc.ui().window_region(&container).unwrap().top_left;
+            let container_pos = ctx.data.render.window_region(&container).unwrap().top_left;
             let pos = ctx.data.pos + container_pos - id_pos;
             let size = region.size();
-            select(rsc, ctx.state, id, pos, size, ctx.data.sense.is_dragging());
+            select(
+                rsc,
+                ctx.data.render,
+                ctx.state,
+                id,
+                pos,
+                size,
+                ctx.data.sense.is_dragging(),
+            );
         });
     }
 }
@@ -34,6 +42,7 @@ where
         rsc.register_event(id, CursorSense::click_or_drag(), move |ctx, rsc| {
             select(
                 rsc,
+                ctx.data.render,
                 ctx.state,
                 id,
                 ctx.data.pos,
@@ -45,7 +54,8 @@ where
 }
 
 fn select(
-    rsc: &mut impl HasUi,
+    rsc: &mut impl UiRsc,
+    render: &UiRenderState,
     state: &mut impl HasDefaultUiState,
     id: WeakWidget<TextEdit>,
     pos: Vec2,
@@ -57,7 +67,7 @@ fn select(
     let recent = (now - state.last_click) < Duration::from_millis(300);
     state.last_click = now;
     id.edit(rsc).select(pos, size, dragging, recent);
-    if let Some(region) = rsc.ui().window_region(&id) {
+    if let Some(region) = render.window_region(&id) {
         state.window.set_ime_allowed(true);
         state.window.set_ime_cursor_area(
             LogicalPosition::<f32>::from(region.top_left.tuple()),
diff --git a/src/default/mod.rs b/src/default/mod.rs
index 106e5b7..dd3e253 100644
--- a/src/default/mod.rs
+++ b/src/default/mod.rs
@@ -30,6 +30,7 @@ pub use task::*;
 pub type Proxy<Event> = EventLoopProxy<Event>;
 
 pub struct DefaultUiState {
+    pub root: Option<StrongWidget>,
     pub renderer: UiRenderer,
     pub input: Input,
     pub focus: Option<WeakWidget<TextEdit>>,
@@ -39,10 +40,17 @@ pub struct DefaultUiState {
     pub last_click: Instant,
 }
 
+impl HasRoot for DefaultUiState {
+    fn set_root(&mut self, root: StrongWidget) {
+        self.root = Some(root);
+    }
+}
+
 impl DefaultUiState {
     pub fn new(window: impl Into<Arc<Window>>) -> Self {
         let window = window.into();
         Self {
+            root: None,
             renderer: UiRenderer::new(window.clone()),
             window,
             input: Input::default(),
@@ -64,18 +72,30 @@ pub trait DefaultAppState: HasDefaultUiState {
     fn new(ui_state: DefaultUiState, rsc: &mut DefaultRsc<Self>, proxy: Proxy<Self::Event>)
     -> Self;
     #[allow(unused_variables)]
-    fn event(&mut self, event: Self::Event, rsc: &mut DefaultRsc<Self>) {}
+    fn event(
+        &mut self,
+        event: Self::Event,
+        rsc: &mut DefaultRsc<Self>,
+        render: &mut UiRenderState,
+    ) {
+    }
     #[allow(unused_variables)]
-    fn exit(&mut self, rsc: &mut DefaultRsc<Self>) {}
+    fn exit(&mut self, rsc: &mut DefaultRsc<Self>, render: &mut UiRenderState) {}
     #[allow(unused_variables)]
-    fn window_event(&mut self, event: WindowEvent, rsc: &mut DefaultRsc<Self>) {}
+    fn window_event(
+        &mut self,
+        event: WindowEvent,
+        rsc: &mut DefaultRsc<Self>,
+        render: &mut UiRenderState,
+    ) {
+    }
     fn window_attributes() -> WindowAttributes {
         Default::default()
     }
 }
 
 pub struct DefaultRsc<State: 'static> {
-    pub ui: Ui,
+    pub ui: UiData,
     pub events: EventManager<Self>,
     pub tasks: Tasks<Self>,
     _state: PhantomData<State>,
@@ -96,14 +116,26 @@ impl<State> DefaultRsc<State> {
     }
 }
 
-impl<State> HasUi for DefaultRsc<State> {
-    fn ui(&self) -> &Ui {
+impl<State> UiRsc for DefaultRsc<State> {
+    fn ui(&self) -> &UiData {
         &self.ui
     }
 
-    fn ui_mut(&mut self) -> &mut Ui {
+    fn ui_mut(&mut self) -> &mut UiData {
         &mut self.ui
     }
+
+    fn on_draw(&mut self, active: &ActiveData) {
+        self.events.draw(active);
+    }
+
+    fn on_undraw(&mut self, active: &ActiveData) {
+        self.events.undraw(active);
+    }
+
+    fn on_remove(&mut self, id: WidgetId) {
+        self.events.remove(id);
+    }
 }
 
 impl<State: 'static> HasState for DefaultRsc<State> {
@@ -128,6 +160,7 @@ impl<State: 'static> HasTasks for DefaultRsc<State> {
 
 pub struct DefaultApp<State: DefaultAppState> {
     rsc: DefaultRsc<State>,
+    render: UiRenderState,
     state: State,
     task_recv: TaskMsgReceiver<DefaultRsc<State>>,
 }
@@ -142,23 +175,32 @@ impl<State: DefaultAppState> AppState for DefaultApp<State> {
         let default_state = DefaultUiState::new(window);
         let (mut rsc, task_recv) = DefaultRsc::init(default_state.window.clone());
         let state = State::new(default_state, &mut rsc, proxy);
+        let render = UiRenderState::new();
         Self {
             rsc,
             state,
+            render,
             task_recv,
         }
     }
 
     fn event(&mut self, event: Self::Event, _: &ActiveEventLoop) {
-        self.state.event(event, &mut self.rsc);
+        self.state.event(event, &mut self.rsc, &mut self.render);
     }
 
     fn window_event(&mut self, event: WindowEvent, event_loop: &ActiveEventLoop) {
-        for update in self.task_recv.try_iter() {
-            update(&mut self.state, &mut self.rsc);
+        let Self {
+            rsc,
+            render,
+            state,
+            task_recv,
+        } = self;
+
+        for update in task_recv.try_iter() {
+            update(state, rsc);
         }
 
-        let ui_state = self.state.default_state_mut();
+        let ui_state = state.default_state_mut();
         let input_changed = ui_state.input.event(&event);
         let cursor_state = ui_state.cursor_state().clone();
         let old = ui_state.focus;
@@ -167,45 +209,43 @@ impl<State: DefaultAppState> AppState for DefaultApp<State> {
         }
         if input_changed {
             let window_size = ui_state.window_size();
-            self.rsc
-                .run_sensors(&mut self.state, cursor_state, window_size);
+            render.run_sensors(rsc, state, cursor_state, window_size);
         }
-        let ui = &mut self.rsc.ui;
-        let ui_state = self.state.default_state_mut();
+        let ui_state = state.default_state_mut();
         if old != ui_state.focus
             && let Some(old) = old
         {
-            old.edit(ui).deselect();
+            old.edit(rsc).deselect();
         }
         match &event {
             WindowEvent::CloseRequested => event_loop.exit(),
             WindowEvent::RedrawRequested => {
-                ui.update(&mut self.rsc.events);
-                ui_state.renderer.update(ui);
+                render.update(&ui_state.root, rsc);
+                ui_state.renderer.update(&mut rsc.ui, render);
                 ui_state.renderer.draw();
             }
             WindowEvent::Resized(size) => {
-                ui.resize((size.width, size.height));
+                render.resize((size.width, size.height));
                 ui_state.renderer.resize(size)
             }
             WindowEvent::KeyboardInput { event, .. } => {
                 if let Some(sel) = ui_state.focus
                     && event.state.is_pressed()
                 {
-                    let mut text = sel.edit(ui);
+                    let mut text = sel.edit(rsc);
                     match text.apply_event(event, &ui_state.input.modifiers) {
                         TextInputResult::Unfocus => {
                             ui_state.focus = None;
                             ui_state.window.set_ime_allowed(false);
                         }
                         TextInputResult::Submit => {
-                            self.rsc.run_event::<Submit>(sel, (), &mut self.state);
+                            rsc.run_event::<Submit>(sel, (), state);
                         }
                         TextInputResult::Paste => {
                             if let Ok(t) = ui_state.clipboard.get_text() {
                                 text.insert(&t);
                             }
-                            self.rsc.run_event::<Edited>(sel, (), &mut self.state);
+                            rsc.run_event::<Edited>(sel, (), state);
                         }
                         TextInputResult::Copy(text) => {
                             if let Err(err) = ui_state.clipboard.set_text(text) {
@@ -213,7 +253,7 @@ impl<State: DefaultAppState> AppState for DefaultApp<State> {
                             }
                         }
                         TextInputResult::Used => {
-                            self.rsc.run_event::<Edited>(sel, (), &mut self.state);
+                            rsc.run_event::<Edited>(sel, (), state);
                         }
                         TextInputResult::Unused => {}
                     }
@@ -221,7 +261,7 @@ impl<State: DefaultAppState> AppState for DefaultApp<State> {
             }
             WindowEvent::Ime(ime) => {
                 if let Some(sel) = ui_state.focus {
-                    let mut text = sel.edit(ui);
+                    let mut text = sel.edit(rsc);
                     match ime {
                         Ime::Enabled | Ime::Disabled => (),
                         Ime::Preedit(content, _pos) => {
@@ -237,15 +277,15 @@ impl<State: DefaultAppState> AppState for DefaultApp<State> {
             }
             _ => (),
         }
-        self.state.window_event(event, &mut self.rsc);
+        state.window_event(event, rsc, render);
         let ui_state = self.state.default_state_mut();
-        if self.rsc.ui.needs_redraw() {
+        if render.needs_redraw(&ui_state.root, rsc.widgets()) {
             ui_state.renderer.window().request_redraw();
         }
         ui_state.input.end_frame();
     }
 
     fn exit(&mut self) {
-        self.state.exit(&mut self.rsc);
+        self.state.exit(&mut self.rsc, &mut self.render);
     }
 }
diff --git a/src/default/render.rs b/src/default/render.rs
index 09eeadd..625a9fa 100644
--- a/src/default/render.rs
+++ b/src/default/render.rs
@@ -1,4 +1,4 @@
-use iris_core::{Ui, UiLimits, UiRenderNode};
+use iris_core::{UiData, UiLimits, UiRenderNode, UiRenderState};
 use pollster::FutureExt;
 use std::sync::Arc;
 use wgpu::*;
@@ -17,8 +17,8 @@ pub struct UiRenderer {
 }
 
 impl UiRenderer {
-    pub fn update(&mut self, ui: &mut Ui) {
-        self.ui.update(&self.device, &self.queue, ui);
+    pub fn update(&mut self, ui: &mut UiData, render: &mut UiRenderState) {
+        self.ui.update(&self.device, &self.queue, ui, render);
     }
 
     pub fn draw(&mut self) {
diff --git a/src/default/sense.rs b/src/default/sense.rs
index db88abd..ee73ee9 100644
--- a/src/default/sense.rs
+++ b/src/default/sense.rs
@@ -26,9 +26,9 @@ pub enum CursorSense {
 pub struct CursorSenses(Vec<CursorSense>);
 
 impl Event for CursorSenses {
-    type Data = CursorData;
+    type Data<'a> = CursorData<'a>;
     type State = SensorState;
-    fn should_run(&self, data: &Self::Data) -> Option<Self::Data> {
+    fn should_run<'a>(&self, data: &Self::Data<'a>) -> Option<Self::Data<'a>> {
         if let Some(sense) = should_run(self, &data.cursor, data.hover) {
             let mut data = data.clone();
             data.sense = sense;
@@ -129,7 +129,7 @@ pub struct SensorState {
 }
 
 #[derive(Clone)]
-pub struct CursorData {
+pub struct CursorData<'a> {
     /// where this widget was hit
     pub pos: Vec2,
     pub size: Vec2,
@@ -138,20 +138,36 @@ pub struct CursorData {
     pub cursor: CursorState,
     /// the first sense that triggered this
     pub sense: CursorSense,
+    pub render: &'a UiRenderState,
 }
 
-pub trait SensorUi<Rsc: HasEvents> {
-    fn run_sensors(&mut self, state: &mut Rsc::State, cursor: CursorState, window_size: Vec2);
+pub trait SensorUi {
+    fn run_sensors<Rsc: HasEvents>(
+        &self,
+        rsc: &mut Rsc,
+        state: &mut Rsc::State,
+        cursor: CursorState,
+        window_size: Vec2,
+    );
 }
 
-impl<Rsc: HasEvents> SensorUi<Rsc> for Rsc {
-    fn run_sensors(&mut self, state: &mut Rsc::State, cursor: CursorState, window_size: Vec2) {
-        let layers = std::mem::take(&mut self.ui_mut().layers);
-        let mut active = std::mem::take(&mut self.events_mut().get_type::<CursorSense>().active);
-        for layer in layers.indices().rev() {
+impl SensorUi for UiRenderState {
+    fn run_sensors<Rsc: HasEvents>(
+        &self,
+        rsc: &mut Rsc,
+        state: &mut Rsc::State,
+        cursor: CursorState,
+        window_size: Vec2,
+    ) {
+        // in order to remove this take, need to store active list in UiRenderState somehow
+        // this would probably be done through a generic parameter that adds yet another rsc /
+        // state like thing, but local to render state, and is passed to UiRsc events so you can
+        // update it there?
+        let mut active = std::mem::take(&mut rsc.events_mut().get_type::<CursorSense>().active);
+        for layer in self.layers.indices().rev() {
             let mut sensed = false;
             for (id, sensor) in active.get_mut(&layer).into_flat_iter() {
-                let shape = self.ui().active.get(id).unwrap().region;
+                let shape = self.active.get(id).unwrap().region;
                 let region = shape.to_px(window_size);
                 let in_shape = cursor.exists && region.contains(cursor.pos);
                 sensor.hover.update(in_shape);
@@ -171,15 +187,15 @@ impl<Rsc: HasEvents> SensorUi<Rsc> for Rsc {
                     // this does not have any meaning;
                     // might wanna set up Event to have a prepare stage
                     sense: CursorSense::Hovering,
+                    render: self,
                 };
-                self.run_event::<CursorSense>(*id, data, state);
+                rsc.run_event::<CursorSense>(*id, data, state);
             }
             if sensed {
                 break;
             }
         }
-        self.events_mut().get_type::<CursorSense>().active = active;
-        self.ui_mut().layers = layers;
+        rsc.events_mut().get_type::<CursorSense>().active = active;
     }
 }
 
diff --git a/src/event.rs b/src/event.rs
index dfb3422..03cd18a 100644
--- a/src/event.rs
+++ b/src/event.rs
@@ -2,13 +2,13 @@ use iris_core::*;
 use iris_macro::*;
 use std::sync::Arc;
 
-use crate::default::{TaskCtx, Tasks};
+use crate::default::{TaskCtx, TaskUpdate, Tasks};
 
 pub trait Eventable<Rsc: HasEvents, Tag>: WidgetLike<Rsc, Tag> {
     fn on<E: EventLike>(
         self,
         event: E,
-        f: impl WidgetEventFn<Rsc, <E::Event as Event>::Data, Self::Widget>,
+        f: impl for<'a> WidgetEventFn<Rsc, <E::Event as Event>::Data<'a>, Self::Widget>,
     ) -> impl WidgetIdFn<Rsc, Self::Widget> {
         move |rsc| {
             let id = self.add(rsc);
@@ -30,24 +30,22 @@ impl<WL: WidgetLike<Rsc, Tag>, Rsc: HasEvents, Tag> Eventable<Rsc, Tag> for WL {
 
 widget_trait! {
     pub trait TaskEventable<Rsc: HasEvents + HasTasks>;
-    fn task_on<E: EventLike, F: AsyncWidgetEventFn<Rsc, <E::Event as Event>::Data, WL::Widget>>(
+    fn task_on<'a, E: EventLike, F: AsyncWidgetEventFn<Rsc, WL::Widget>>(
         self,
         event: E,
         f: F,
     ) -> impl WidgetIdFn<Rsc, WL::Widget>
-        where <E::Event as Event>::Data: Send,
-        for<'a> F::CallRefFuture<'a>: Send,
+        where <E::Event as Event>::Data<'a>: Send,
+        for<'b> F::CallRefFuture<'b>: Send,
     {
         let f = Arc::new(f);
         move |rsc| {
             let id = self.add(rsc);
-            rsc.register_event(id, event.into_event(), move |ctx, rsc| {
-                let data = ctx.data;
+            rsc.register_event(id, event.into_event(), move |_, rsc| {
                 let f = f.clone();
                 rsc.tasks_mut().spawn(async move |task| {
                     f(AsyncEventIdCtx {
                         widget: id,
-                        data,
                         task,
                     }).await;
                 });
@@ -61,21 +59,22 @@ pub trait HasTasks: Sized + HasState + HasEvents {
     fn tasks_mut(&mut self) -> &mut Tasks<Self>;
 }
 
-pub trait AsyncWidgetEventFn<Rsc: HasEvents, Data, W: ?Sized>:
-    AsyncFn(AsyncEventIdCtx<Rsc, Data, W>) + Send + Sync + 'static
+pub trait AsyncWidgetEventFn<Rsc: HasEvents, W: ?Sized>:
+    AsyncFn(AsyncEventIdCtx<Rsc, W>) + Send + Sync + 'static
 {
 }
-impl<
-    Rsc: HasEvents,
-    F: AsyncFn(AsyncEventIdCtx<Rsc, Data, W>) + Send + Sync + 'static,
-    Data,
-    W: ?Sized,
-> AsyncWidgetEventFn<Rsc, Data, W> for F
+impl<Rsc: HasEvents, F: AsyncFn(AsyncEventIdCtx<Rsc, W>) + Send + Sync + 'static, W: ?Sized>
+    AsyncWidgetEventFn<Rsc, W> for F
 {
 }
 
-pub struct AsyncEventIdCtx<Rsc: HasEvents, Data, W: ?Sized> {
+pub struct AsyncEventIdCtx<Rsc: HasEvents, W: ?Sized> {
     pub widget: WeakWidget<W>,
-    pub data: Data,
-    pub task: TaskCtx<Rsc>,
+    task: TaskCtx<Rsc>,
+}
+
+impl<Rsc: HasEvents, W: ?Sized> AsyncEventIdCtx<Rsc, W> {
+    pub fn update(&mut self, f: impl TaskUpdate<Rsc> + 'static) {
+        self.task.update(f);
+    }
 }
diff --git a/src/widget/image.rs b/src/widget/image.rs
index d90b743..244bbb8 100644
--- a/src/widget/image.rs
+++ b/src/widget/image.rs
@@ -19,10 +19,10 @@ impl Widget for Image {
     }
 }
 
-pub fn image<State: HasUi>(image: impl LoadableImage) -> impl WidgetFn<State, Image> {
+pub fn image<State: UiRsc>(image: impl LoadableImage) -> impl WidgetFn<State, Image> {
     let image = image.get_image().expect("Failed to load image");
     move |state| Image {
-        handle: state.ui_mut().add_texture(image),
+        handle: state.ui_mut().textures.add(image),
     }
 }
 
diff --git a/src/widget/text/build.rs b/src/widget/text/build.rs
index 7f8f255..a2e8134 100644
--- a/src/widget/text/build.rs
+++ b/src/widget/text/build.rs
@@ -51,7 +51,7 @@ impl<State, O, H: WidgetOption<State>> TextBuilder<State, O, H> {
     }
 }
 
-impl<Rsc: HasUi, O> TextBuilder<Rsc, O> {
+impl<Rsc: UiRsc, O> TextBuilder<Rsc, O> {
     pub fn hint<W: WidgetLike<Rsc, Tag>, Tag>(
         self,
         hint: W,
@@ -75,7 +75,7 @@ pub trait TextBuilderOutput<State>: Sized {
 }
 
 pub struct TextOutput;
-impl<Rsc: HasUi> TextBuilderOutput<Rsc> for TextOutput {
+impl<Rsc: UiRsc> TextBuilderOutput<Rsc> for TextOutput {
     type Output = Text;
 
     fn run<H: WidgetOption<Rsc>>(
@@ -103,7 +103,7 @@ pub struct TextEditOutput {
     mode: EditMode,
 }
 
-impl<State: HasUi> TextBuilderOutput<State> for TextEditOutput {
+impl<State: UiRsc> TextBuilderOutput<State> for TextEditOutput {
     type Output = TextEdit;
 
     fn run<H: WidgetOption<State>>(
diff --git a/src/widget/text/edit.rs b/src/widget/text/edit.rs
index d5cc1bb..846d16e 100644
--- a/src/widget/text/edit.rs
+++ b/src/widget/text/edit.rs
@@ -617,11 +617,11 @@ impl DerefMut for TextEdit {
 }
 
 pub trait TextEditable {
-    fn edit<'a>(&self, ui: &'a mut impl HasUi) -> TextEditCtx<'a>;
+    fn edit<'a>(&self, ui: &'a mut impl UiRsc) -> TextEditCtx<'a>;
 }
 
 impl<I: IdLike<Widget = TextEdit>> TextEditable for I {
-    fn edit<'a>(&self, ui: &'a mut impl HasUi) -> TextEditCtx<'a> {
+    fn edit<'a>(&self, ui: &'a mut impl UiRsc) -> TextEditCtx<'a> {
         let ui = ui.ui_mut();
         TextEditCtx {
             text: ui.widgets.get_mut(self).unwrap(),
diff --git a/src/widget/trait_fns.rs b/src/widget/trait_fns.rs
index 87af7fe..effebc8 100644
--- a/src/widget/trait_fns.rs
+++ b/src/widget/trait_fns.rs
@@ -3,7 +3,7 @@ use crate::prelude::*;
 
 // these methods should "not require any context" (require unit) because they're in core
 widget_trait! {
-    pub trait CoreWidget<Rsc: HasUi + 'static>;
+    pub trait CoreWidget<Rsc: UiRsc + 'static>;
 
     fn pad(self, padding: impl Into<Padding>) -> impl WidgetFn<Rsc, Pad> {
         |state| Pad {
@@ -26,7 +26,7 @@ widget_trait! {
     fn label(self, label: impl Into<String>) -> impl WidgetIdFn<Rsc, WL::Widget> {
         |state| {
             let id = self.add(state);
-            state.ui_mut().set_label(id, label.into());
+            state.ui_mut().widgets.set_label(id, label.into());
             id
         }
     }
@@ -127,7 +127,7 @@ widget_trait! {
 
     fn set_ptr(self, ptr: WeakWidget<WidgetPtr>, state: &mut Rsc) {
         let id = self.add_strong(state);
-        state.ui_mut()[ptr].inner = Some(id);
+        state.ui_mut().widgets[ptr].inner = Some(id);
     }
 }