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Add Response::contains_pointer (#3859)

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* Part of https://github.com/emilk/egui/issues/3841
This commit is contained in:
Emil Ernerfeldt
2024-01-22 11:17:03 +01:00
committed by GitHub
parent 894a53488a
commit 2d725d157f
2 changed files with 28 additions and 7 deletions
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20
crates/egui_demo_lib/src/demo/drag_and_drop.rs
View File

@@ -49,11 +49,14 @@ pub fn drop_target<R>(
let outer_rect = Rect::from_min_max(outer_rect_bounds.min, content_ui.min_rect().max + margin);
let (rect, response) = ui.allocate_at_least(outer_rect.size(), Sense::hover());
let style = if is_being_dragged && can_accept_what_is_being_dragged && response.hovered() {
ui.visuals().widgets.active
} else {
ui.visuals().widgets.inactive
};
// NOTE: we use `response.contains_pointer` here instead of `hovered`, because
// `hovered` is always false when another widget is being dragged.
let style =
if is_being_dragged && can_accept_what_is_being_dragged && response.contains_pointer() {
ui.visuals().widgets.active
} else {
ui.visuals().widgets.inactive
};
let mut fill = style.bg_fill;
let mut stroke = style.bg_stroke;
@@ -149,7 +152,12 @@ impl super::View for DragAndDropDemo {
});
let is_being_dragged = ui.memory(|mem| mem.is_anything_being_dragged());
if is_being_dragged && can_accept_what_is_being_dragged && response.hovered() {
// NOTE: we use `response.contains_pointer` here instead of `hovered`, because
// `hovered` is always false when another widget is being dragged.
if is_being_dragged
&& can_accept_what_is_being_dragged
&& response.contains_pointer()
{
drop_col = Some(col_idx);
}
}