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Add drag-to-open for collapsible panels (#8363)

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A fully collapsed `show_collapsible` panel now leaves a thin grab handle
at its fixed edge, invisible until hovered. Dragging it out past
`min_size` (or double-clicking it) reopens the panel. Opt out with
`panel.drag_to_open(false)`.

---------

Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
This commit is contained in:
Emil Ernerfeldt
2026-08-04 02:20:25 -07:00
committed by GitHub
parent 98eab50577
commit 622bbbeccc
8 changed files with 520 additions and 71 deletions
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3
crates/egui_demo_app/src/wrap_app.rs
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@@ -361,7 +361,8 @@ impl WrapApp {
let mut cmd = Command::Nothing;
egui::Panel::left("backend_panel")
.resizable(false)
.resizable(true)
.size_range(280..=400)
.show_collapsible(ui, &mut is_open, |ui| {
ui.add_space(4.0);
ui.vertical_centered(|ui| {