diff --git a/src/core/sense.rs b/src/core/sense.rs
index 749fc54..4338c9e 100644
--- a/src/core/sense.rs
+++ b/src/core/sense.rs
@@ -1,29 +1,25 @@
-use crate::{Sense, SenseFn, Sensor, Ui, Widget, WidgetId, WidgetIdFn, WidgetLike};
+use crate::{Sense, SenseFn, Sensor, Ui, Widget, WidgetId, WidgetIdFnRet, WidgetLike};
 
 pub trait Sensable<W, Ctx, Tag> {
-    fn on(
-        self,
-        sense: Sense,
-        f: impl SenseFn<Ctx>,
-    ) -> impl WidgetIdFn<W, Ctx>;
+    fn on(self, sense: Sense, f: impl SenseFn<Ctx>) -> WidgetIdFnRet!(W, Ctx);
     fn id_on(
         self,
         sense: Sense,
         f: impl FnMut(&WidgetId<W>, &mut Ui<Ctx>, &mut Ctx) + 'static + Clone,
-    ) -> impl WidgetIdFn<W, Ctx>
+    ) -> WidgetIdFnRet!(W, Ctx)
     where
         W: Widget<Ctx>;
     fn edit_on(
         self,
         sense: Sense,
         f: impl FnMut(&mut W, &mut Ctx) + 'static + Clone,
-    ) -> impl WidgetIdFn<W, Ctx>
+    ) -> WidgetIdFnRet!(W, Ctx)
     where
         W: Widget<Ctx>;
 }
 
 impl<W: WidgetLike<Ctx, Tag>, Ctx, Tag> Sensable<W::Widget, Ctx, Tag> for W {
-    fn on(self, sense: Sense, f: impl SenseFn<Ctx>) -> impl WidgetIdFn<W::Widget, Ctx> {
+    fn on(self, sense: Sense, f: impl SenseFn<Ctx>) -> WidgetIdFnRet!(W::Widget, Ctx) {
         move |ui| {
             let id = self.add(ui);
             ui.add_sensor(
@@ -41,7 +37,7 @@ impl<W: WidgetLike<Ctx, Tag>, Ctx, Tag> Sensable<W::Widget, Ctx, Tag> for W {
         sense: Sense,
         // trait copied here bc rust analyzer skill issue
         mut f: impl FnMut(&WidgetId<W::Widget>, &mut Ui<Ctx>, &mut Ctx) + 'static + Clone,
-    ) -> impl WidgetIdFn<W::Widget, Ctx>
+    ) -> WidgetIdFnRet!(W::Widget, Ctx)
     where
         W::Widget: Widget<Ctx>,
     {
@@ -55,7 +51,7 @@ impl<W: WidgetLike<Ctx, Tag>, Ctx, Tag> Sensable<W::Widget, Ctx, Tag> for W {
         sense: Sense,
         // trait copied here bc rust analyzer skill issue
         mut f: impl FnMut(&mut W::Widget, &mut Ctx) + 'static + Clone,
-    ) -> impl WidgetIdFn<W::Widget, Ctx>
+    ) -> WidgetIdFnRet!(W::Widget, Ctx)
     where
         W::Widget: Widget<Ctx>,
     {
diff --git a/src/core/trait_fns.rs b/src/core/trait_fns.rs
index 0ea66d7..b93d7cb 100644
--- a/src/core/trait_fns.rs
+++ b/src/core/trait_fns.rs
@@ -1,28 +1,28 @@
 use super::*;
-use crate::{UiRegion, Vec2, WidgetArrLike, WidgetFn, WidgetLike};
+use crate::{UiRegion, Vec2, WidgetArrLike, WidgetFnRet, WidgetLike};
 
 pub trait CoreWidget<W: 'static, Ctx: 'static, Tag> {
-    fn pad(self, padding: impl Into<Padding>) -> impl WidgetFn<Regioned, Ctx>;
-    fn center(self, size: impl Into<Vec2>) -> impl WidgetFn<Regioned, Ctx>;
-    fn region(self, region: UiRegion) -> impl WidgetFn<Regioned, Ctx>;
+    fn pad(self, padding: impl Into<Padding>) -> WidgetFnRet!(Regioned, Ctx);
+    fn center(self, size: impl Into<Vec2>) -> WidgetFnRet!(Regioned, Ctx);
+    fn region(self, region: UiRegion) -> WidgetFnRet!(Regioned, Ctx);
 }
 
 impl<W: WidgetLike<Ctx, Tag>, Ctx: 'static, Tag> CoreWidget<W::Widget, Ctx, Tag> for W {
-    fn pad(self, padding: impl Into<Padding>) -> impl WidgetFn<Regioned, Ctx> {
+    fn pad(self, padding: impl Into<Padding>) -> WidgetFnRet!(Regioned, Ctx) {
         |ui| Regioned {
             region: padding.into().region(),
             inner: self.add(ui).erase_type(),
         }
     }
 
-    fn center(self, size: impl Into<Vec2>) -> impl WidgetFn<Regioned, Ctx> {
+    fn center(self, size: impl Into<Vec2>) -> WidgetFnRet!(Regioned, Ctx) {
         |ui| Regioned {
             region: UiRegion::center().size(size.into()),
             inner: self.add(ui).erase_type(),
         }
     }
 
-    fn region(self, region: UiRegion) -> impl WidgetFn<Regioned, Ctx> {
+    fn region(self, region: UiRegion) -> WidgetFnRet!(Regioned, Ctx) {
         move |ui| Regioned {
             region,
             inner: self.add(ui).erase_type(),
@@ -31,21 +31,21 @@ impl<W: WidgetLike<Ctx, Tag>, Ctx: 'static, Tag> CoreWidget<W::Widget, Ctx, Tag>
 }
 
 pub trait CoreWidgetArr<const LEN: usize, Ctx: 'static, Tag> {
-    fn span(self, dir: Dir, lengths: [impl Into<SpanLen>; LEN]) -> impl WidgetFn<Span, Ctx>;
-    fn stack(self) -> impl WidgetFn<Stack, Ctx>;
+    fn span(self, dir: Dir, lengths: [impl Into<SpanLen>; LEN]) -> WidgetFnRet!(Span, Ctx);
+    fn stack(self) -> WidgetFnRet!(Stack, Ctx);
 }
 
 impl<const LEN: usize, Wa: WidgetArrLike<LEN, Ctx, Tag>, Ctx: 'static, Tag>
     CoreWidgetArr<LEN, Ctx, Tag> for Wa
 {
-    fn span(self, dir: Dir, lengths: [impl Into<SpanLen>; LEN]) -> impl WidgetFn<Span, Ctx> {
+    fn span(self, dir: Dir, lengths: [impl Into<SpanLen>; LEN]) -> WidgetFnRet!(Span, Ctx) {
         let lengths = lengths.map(Into::into);
         move |ui| Span {
             dir,
             children: self.ui(ui).arr.into_iter().zip(lengths).collect(),
         }
     }
-    fn stack(self) -> impl WidgetFn<Stack, Ctx> {
+    fn stack(self) -> WidgetFnRet!(Stack, Ctx) {
         move |ui| Stack {
             children: self.ui(ui).arr.to_vec(),
         }
diff --git a/src/layout/sense.rs b/src/layout/sense.rs
index de0eee8..d8af829 100644
--- a/src/layout/sense.rs
+++ b/src/layout/sense.rs
@@ -33,7 +33,6 @@ pub struct Sensor<Ctx> {
 
 pub type SensorMap<Ctx> = HashMap<Id, SensorGroup<Ctx>>;
 pub type ActiveSensors = Vec<(SenseShape, Id)>;
-pub trait SenseFn_<Ctx> = FnMut(&mut Ui<Ctx>, &mut Ctx) + 'static;
 pub type SenseShape = UiRegion;
 #[derive(Clone)]
 pub struct SenseTrigger {
@@ -45,10 +44,10 @@ pub struct SensorGroup<Ctx> {
     pub cursor: ActivationState,
     pub sensors: Vec<Sensor<Ctx>>,
 }
-pub trait SenseFn<Ctx>: SenseFn_<Ctx> {
+pub trait SenseFn<Ctx>: FnMut(&mut Ui<Ctx>, &mut Ctx) + 'static {
     fn box_clone(&self) -> Box<dyn SenseFn<Ctx>>;
 }
-impl<F: SenseFn_<Ctx> + Clone, Ctx> SenseFn<Ctx> for F {
+impl<F: FnMut(&mut Ui<Ctx>, &mut Ctx) + 'static + Clone, Ctx> SenseFn<Ctx> for F {
     fn box_clone(&self) -> Box<dyn SenseFn<Ctx>> {
         Box::new(self.clone())
     }
diff --git a/src/layout/widget.rs b/src/layout/widget.rs
index 32abdd5..6be44d2 100644
--- a/src/layout/widget.rs
+++ b/src/layout/widget.rs
@@ -74,7 +74,7 @@ pub trait WidgetLike<Ctx, Tag> {
     fn with_id<W2>(
         self,
         f: impl FnOnce(&mut Ui<Ctx>, WidgetId<Self::Widget>) -> WidgetId<W2>,
-    ) -> impl WidgetIdFn<W2, Ctx>
+    ) -> WidgetIdFnRet!(W2, Ctx)
     where
         Self: Sized,
     {
@@ -85,11 +85,28 @@ pub trait WidgetLike<Ctx, Tag> {
     }
 }
 
-/// A function that returns a widget given a UI.
-/// Useful for defining trait functions on widgets that create a parent widget so that the children
-/// don't need to be IDs yet
-pub trait WidgetFn<W: Widget<Ctx>, Ctx> = FnOnce(&mut Ui<Ctx>) -> W;
-pub trait WidgetIdFn<W, Ctx> = FnOnce(&mut Ui<Ctx>) -> WidgetId<W>;
+// A function that returns a widget given a UI.
+// Useful for defining trait functions on widgets that create a parent widget so that the children
+// don't need to be IDs yet
+// pub trait WidgetFn<W: Widget<Ctx>, Ctx> = FnOnce(&mut Ui<Ctx>) -> W;
+// pub trait WidgetIdFn<W, Ctx> = FnOnce(&mut Ui<Ctx>) -> WidgetId<W>;
+
+// copium for rust analyzer
+macro_rules! WidgetFnRet {
+    ($W:ty, $Ctx:ty) => {
+        impl FnOnce(&mut $crate::Ui<$Ctx>) -> $W
+    };
+}
+pub(crate) use WidgetFnRet;
+macro_rules! WidgetIdFnRet {
+    ($W:ty, $Ctx:ty) => {
+        impl FnOnce(&mut $crate::Ui<$Ctx>) -> $crate::WidgetId<$W>
+    };
+    ($W:ty, $Ctx:ty, $($use:tt)*) => {
+        impl FnOnce(&mut $crate::Ui<$Ctx>) -> $crate::WidgetId<$W> + use<$($use)*>
+    };
+}
+pub(crate) use WidgetIdFnRet;
 
 pub trait Idable<Ctx, Tag> {
     type Widget: Widget<Ctx>;
@@ -97,7 +114,7 @@ pub trait Idable<Ctx, Tag> {
     fn id<'a>(
         self,
         id: &WidgetId<Self::Widget>,
-    ) -> impl WidgetIdFn<Self::Widget, Ctx> + use<'a, Self, Ctx, Tag>
+    ) -> WidgetIdFnRet!(Self::Widget, Ctx, 'a, Self, Ctx, Tag)
     where
         Self: Sized,
     {
diff --git a/src/testing/mod.rs b/src/testing/mod.rs
index b331146..89e76bf 100644
--- a/src/testing/mod.rs
+++ b/src/testing/mod.rs
@@ -84,6 +84,7 @@ impl Client {
             let main = main.clone();
             let to = to.clone().erase_type();
             Rect::new(color)
+                .on(Sense::PressEnd, |_, _| {})
                 .id_on(Sense::PressStart, move |id, ui, _| {
                     ui[&main].inner = to.clone();
                     ui[id].color = color.add_rgb(-0.2);