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Allow scroll into view without specifying an alignment (#1247)

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* Allow scroll into view without specifying an alignment
* Handle case of UI being too big to fit in the scroll view
This commit is contained in:
Juan Campa
2022-02-15 10:52:29 -05:00
committed by GitHub
parent c1cd47e3a7
commit 635c65773d
6 changed files with 60 additions and 31 deletions
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17
egui_demo_lib/src/apps/demo/scrolling.rs
View File

@@ -147,7 +147,7 @@ fn huge_content_painter(ui: &mut egui::Ui) {
#[derive(PartialEq)]
struct ScrollTo {
track_item: usize,
tack_item_align: Align,
tack_item_align: Option<Align>,
offset: f32,
}
@@ -155,7 +155,7 @@ impl Default for ScrollTo {
fn default() -> Self {
Self {
track_item: 25,
tack_item_align: Align::Center,
tack_item_align: Some(Align::Center),
offset: 0.0,
}
}
@@ -180,13 +180,16 @@ impl super::View for ScrollTo {
ui.horizontal(|ui| {
ui.label("Item align:");
track_item |= ui
.radio_value(&mut self.tack_item_align, Align::Min, "Top")
.radio_value(&mut self.tack_item_align, Some(Align::Min), "Top")
.clicked();
track_item |= ui
.radio_value(&mut self.tack_item_align, Align::Center, "Center")
.radio_value(&mut self.tack_item_align, Some(Align::Center), "Center")
.clicked();
track_item |= ui
.radio_value(&mut self.tack_item_align, Align::Max, "Bottom")
.radio_value(&mut self.tack_item_align, Some(Align::Max), "Bottom")
.clicked();
track_item |= ui
.radio_value(&mut self.tack_item_align, None, "None (Bring into view)")
.clicked();
});
@@ -213,7 +216,7 @@ impl super::View for ScrollTo {
let (current_scroll, max_scroll) = scroll_area
.show(ui, |ui| {
if scroll_top {
ui.scroll_to_cursor(Align::TOP);
ui.scroll_to_cursor(Some(Align::TOP));
}
ui.vertical(|ui| {
for item in 1..=50 {
@@ -228,7 +231,7 @@ impl super::View for ScrollTo {
});
if scroll_bottom {
ui.scroll_to_cursor(Align::BOTTOM);
ui.scroll_to_cursor(Some(Align::BOTTOM));
}
let margin = ui.visuals().clip_rect_margin;