migrations/egui
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Add Sense::scroll

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This commit is contained in:
lucasmerlin
2026-03-11 18:46:12 +01:00
parent 8b90dc60c6
commit 362cf8f227
8 changed files with 445 additions and 30 deletions
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52
crates/egui_demo_lib/src/demo/scrolling.rs
View File

@@ -1,6 +1,6 @@
use egui::{
Align, Align2, Color32, DragValue, NumExt as _, Rect, ScrollArea, Sense, Slider, TextStyle,
TextWrapMode, Ui, Vec2, Widget as _, pos2, scroll_area::ScrollBarVisibility,
pos2, scroll_area::ScrollBarVisibility, Align, Align2, Color32, DragValue, NumExt as _, Rect, ScrollArea, Sense,
Slider, TextStyle, TextWrapMode, Ui, Vec2, Widget as _,
};
#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
@@ -13,6 +13,7 @@ enum ScrollDemo {
LargeCanvas,
StickToEnd,
Bidirectional,
Nested,
}
#[cfg_attr(feature = "serde", derive(serde::Deserialize, serde::Serialize))]
@@ -61,6 +62,7 @@ impl crate::View for Scrolling {
);
ui.selectable_value(&mut self.demo, ScrollDemo::StickToEnd, "Stick to end");
ui.selectable_value(&mut self.demo, ScrollDemo::Bidirectional, "Bidirectional");
ui.selectable_value(&mut self.demo, ScrollDemo::Nested, "Nested");
});
ui.separator();
match self.demo {
@@ -87,6 +89,9 @@ impl crate::View for Scrolling {
}
});
}
ScrollDemo::Nested => {
nested_scroll_demo(ui);
}
}
}
}
@@ -392,3 +397,46 @@ impl crate::View for ScrollStickTo {
ui.request_repaint();
}
}
fn nested_scroll_demo(ui: &mut Ui) {
ui.label(
"Nested scroll areas: only the inner-most scroll area under the pointer receives scroll events.",
);
ui.add_space(4.0);
let outer_row_height = 100.0;
let inner_row_height = 20.0;
ScrollArea::vertical()
.id_salt("outer")
.auto_shrink(false)
.show_rows(ui, outer_row_height, 100, |ui, range| {
ui.style_mut().interaction.selectable_labels = false;
for outer_row in range {
egui::Frame::group(ui.style()).show(ui, |ui| {
ScrollArea::horizontal()
.id_salt(format!("outer_row_{outer_row}"))
.show(ui, |ui| {
ui.horizontal(|ui| {
for col in 0..20 {
ui.vertical(|ui| {
ui.set_width(100.0);
ui.label(format!("Column {}", col + 1));
ScrollArea::vertical()
.id_salt(format!("inner_vert_{col}_{outer_row}"))
.max_height(outer_row_height)
.show_rows(ui, inner_row_height, 100, |ui, range| {
for inner_row in range {
ui.label(format!("Col {} Row {}", col + 1, inner_row + 1));
}
});
});
}
});
});
});
ui.separator();
}
});
}