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Add ViewportInfo::occluded and visible (#7948)

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* Part of https://github.com/emilk/egui/issues/5112
* Part of https://github.com/emilk/egui/issues/5113
* Part of https://github.com/emilk/egui/issues/5136

Once we support calling `App::logic` when an app is occluded or
minimized, it is useful to know that it is, in fact, occluded or
minimized.

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
This commit is contained in:
Emil Ernerfeldt
2026-03-02 18:36:04 +01:00
committed by GitHub
parent 9276778181
commit 2be6e225bf
7 changed files with 143 additions and 3 deletions
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31
crates/egui/src/data/input.rs
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@@ -253,9 +253,28 @@ pub struct ViewportInfo {
///
/// This should be the same as [`RawInput::focused`].
pub focused: Option<bool>,
/// Is the window fully occluded (completely covered) by another window?
///
/// Not all platforms support this.
/// On platforms that don't, this will be `None` or `Some(false)`.
pub occluded: Option<bool>,
}
impl ViewportInfo {
/// Is the window considered visible for rendering purposes?
///
/// A window is not visible if it is minimized or occluded.
/// When not visible, the UI is not painted and rendering is skipped,
/// but application logic may still be executed by some integrations.
pub fn visible(&self) -> Option<bool> {
match (self.minimized, self.occluded) {
(Some(true), _) | (_, Some(true)) => Some(false),
(Some(false), Some(false)) => Some(true),
(_, None) | (None, _) => None,
}
}
/// This viewport has been told to close.
///
/// If this is the root viewport, the application will exit
@@ -282,6 +301,7 @@ impl ViewportInfo {
maximized: self.maximized,
fullscreen: self.fullscreen,
focused: self.focused,
occluded: self.occluded,
}
}
@@ -298,6 +318,7 @@ impl ViewportInfo {
maximized,
fullscreen,
focused,
occluded,
} = self;
crate::Grid::new("viewport_info").show(ui, |ui| {
@@ -345,6 +366,16 @@ impl ViewportInfo {
ui.label(opt_as_str(focused));
ui.end_row();
ui.label("Occluded:");
ui.label(opt_as_str(occluded));
ui.end_row();
let visible = self.visible();
ui.label("Visible:");
ui.label(opt_as_str(&visible));
ui.end_row();
fn opt_rect_as_string(v: &Option<Rect>) -> String {
v.as_ref().map_or(String::new(), |r| {
format!("Pos: {:?}, size: {:?}", r.min, r.size())