Collapsing header with custom header (#1538)

* Returns openness in CollapsingResponse * Make CollapsingState a building block for custom collapsing headers * Add a demo of the custom collapsing header * Revert to much simpler tree demo * Add CollapsingState::is_open and CollapsingState::set_open
emilk · Apr 28, 2022 · 39917be · 39917be
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -21,6 +21,7 @@ NOTE: [`epaint`](epaint/CHANGELOG.md), [`eframe`](eframe/CHANGELOG.md), [`egui_w
 * Added `Ui::spinner()` shortcut method ([#1494](https://github.com/emilk/egui/pull/1494)).
 * Added `CursorIcon`s for resizing columns, rows, and the eight cardinal directions.
 * Added `Ui::toggle_value`.
+* Added ability to add any widgets to the header of a collapsing region ([#1538](https://github.com/emilk/egui/pull/1538)).
 
 ### Changed 🔧
 * `ClippedMesh` has been replaced with `ClippedPrimitive` ([#1351](https://github.com/emilk/egui/pull/1351)).