Revert semver-breaking change, and replace with temporary HACK

crates/egui/src/context.rs

@@ -1081,7 +1081,6 @@ impl Context {
             layer_id,
             id,
             rect,
-            interact_rect,
             sense,
             enabled,
             contains_pointer,

crates/egui/src/layers.rs

@@ -170,6 +170,10 @@ impl PaintList {
     pub fn all_entries(&self) -> impl ExactSizeIterator<Item = &ClippedShape> {
         self.0.iter()
     }
+
+    pub fn last(&self) -> Option<&ClippedShape> {
+        self.0.last()
+    }
 }
 
 /// This is where painted [`Shape`]s end up during a frame.

crates/egui/src/response.rs

@@ -32,15 +32,6 @@ pub struct Response {
     /// The area of the screen we are talking about.
     pub rect: Rect,
 
-    /// The rectangle sensing interaction.
-    ///
-    /// This is sometimes smaller than [`Self::rect`] because of clipping
-    /// (e.g. when inside a scroll area).
-    ///
-    /// The interact rect may also be slightly larger than the widget rect,
-    /// because egui adds half if the item spacing to make the interact rect easier to hit.
-    pub interact_rect: Rect,
-
     /// The senses (click and/or drag) that the widget was interested in (if any).
     pub sense: Sense,
 
@@ -610,11 +601,20 @@ impl Response {
     /// ```
     #[must_use]
     pub fn interact(&self, sense: Sense) -> Self {
+        // Temporary hack for 0.26.1 to avoid breaking change.
+        let clip_rect = self.ctx.graphics(|g| {
+            g.get(self.layer_id)
+                .and_then(|list| list.last())
+                .map(|c| c.clip_rect)
+        });
+        let clip_rect = clip_rect.unwrap_or(Rect::EVERYTHING);
+        let interact_rect = self.rect.intersect(clip_rect);
+
         self.ctx.interact_with_hovered(
             self.layer_id,
             self.id,
             self.rect,
-            self.interact_rect,
+            interact_rect,
             sense,
             self.enabled,
             self.contains_pointer,
@@ -809,7 +809,6 @@ impl Response {
             layer_id: self.layer_id,
             id: self.id,
             rect: self.rect.union(other.rect),
-            interact_rect: self.interact_rect.union(other.interact_rect),
             sense: self.sense.union(other.sense),
             enabled: self.enabled || other.enabled,
             contains_pointer: self.contains_pointer || other.contains_pointer,