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Allow manually painting the CollapsingState icon (#1592)

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* Allow manually painting the CollapsingState icon

* Update egui/src/containers/collapsing_header.rs

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>

* Oops

Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
This commit is contained in:
4JX 2022-05-11 17:02:37 +00:00 committed by GitHub
parent e44c9b8e54
commit c47e20c733
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1 changed files with 41 additions and 1 deletions
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42
egui/src/containers/collapsing_header.rs
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@ -89,6 +89,15 @@ impl CollapsingState {
/// Will toggle when clicked, etc.
fn show_default_button_indented(&mut self, ui: &mut Ui) -> Response {
self.show_button_indented(ui, paint_default_icon)
}
/// Will toggle when clicked, etc.
fn show_button_indented(
&mut self,
ui: &mut Ui,
icon_fn: impl FnOnce(&mut Ui, f32, &Response) + 'static,
) -> Response {
let size = Vec2::new(ui.spacing().indent, ui.spacing().icon_width);
let (_id, rect) = ui.allocate_space(size);
let response = ui.interact(rect, self.id, Sense::click());
@ -106,7 +115,7 @@ impl CollapsingState {
rect: icon_rect,
..response.clone()
};
paint_default_icon(ui, openness, &small_icon_response);
icon_fn(ui, openness, &small_icon_response);
response
}
@ -217,6 +226,37 @@ impl CollapsingState {
Some(ret_response)
}
}
/// Paint this [CollapsingState](CollapsingState)'s toggle button. Takes an [IconPainter](IconPainter) as the icon.
/// ```
/// # egui::__run_test_ui(|ui| {
/// fn circle_icon(ui: &mut egui::Ui, openness: f32, response: &egui::Response) {
/// let stroke = ui.style().interact(&response).fg_stroke;
/// let radius = egui::lerp(2.0..=3.0, openness);
/// ui.painter().circle_filled(response.rect.center(), radius, stroke.color);
/// }
///
/// let mut state = egui::collapsing_header::CollapsingState::load_with_default_open(
/// ui.ctx(),
/// ui.make_persistent_id("my_collapsing_state"),
/// false,
/// );
///
/// let header_res = ui.horizontal(|ui| {
/// ui.label("Header");
/// state.show_toggle_button(ui, circle_icon);
/// });
///
/// state.show_body_indented(&header_res.response, ui, |ui| ui.label("Body"));
/// # });
/// ```
pub fn show_toggle_button(
&mut self,
ui: &mut Ui,
icon_fn: impl FnOnce(&mut Ui, f32, &Response) + 'static,
) -> Response {
self.show_button_indented(ui, icon_fn)
}
}
/// From [`CollapsingState::show_header`].