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Panel collapse/expansion animation (#2190)

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* Add API for querying the size of a panel

* demo app: animate backend panel collapse

* Add helper function for animating panels

* More animation functions

* Add line to changelog
This commit is contained in:
Emil Ernerfeldt
2022-10-28 11:51:56 +02:00
committed by GitHub
parent da96fcacd3
commit f7a15a34f9
4 changed files with 332 additions and 35 deletions
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32
crates/egui_demo_app/src/wrap_app.rs
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@@ -200,19 +200,8 @@ impl eframe::App for WrapApp {
self.state.backend_panel.update(ctx, frame);
if !is_mobile(ctx)
&& (self.state.backend_panel.open || ctx.memory().everything_is_visible())
{
egui::SidePanel::left("backend_panel")
.resizable(false)
.show(ctx, |ui| {
ui.vertical_centered(|ui| {
ui.heading("💻 Backend");
});
ui.separator();
self.backend_panel_contents(ui, frame);
});
if !is_mobile(ctx) {
self.backend_panel(ctx, frame);
}
self.show_selected_app(ctx, frame);
@@ -236,6 +225,23 @@ impl eframe::App for WrapApp {
}
impl WrapApp {
fn backend_panel(&mut self, ctx: &egui::Context, frame: &mut eframe::Frame) {
// The backend-panel can be toggled on/off.
// We show a little animation when the user switches it.
let is_open = self.state.backend_panel.open || ctx.memory().everything_is_visible();
egui::SidePanel::left("backend_panel")
.resizable(false)
.show_animated(ctx, is_open, |ui| {
ui.vertical_centered(|ui| {
ui.heading("💻 Backend");
});
ui.separator();
self.backend_panel_contents(ui, frame);
});
}
fn backend_panel_contents(&mut self, ui: &mut egui::Ui, frame: &mut eframe::Frame) {
self.state.backend_panel.ui(ui, frame);