67 lines
2.2 KiB
Rust
67 lines
2.2 KiB
Rust
use crate::{PrimaryWindow, Window, WindowCloseRequested};
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use bevy_app::AppExit;
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use bevy_ecs::prelude::*;
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use bevy_input::{keyboard::KeyCode, Input};
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/// Exit the application when there are no open windows.
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///
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/// This system is added by the [`WindowPlugin`] in the default configuration.
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/// To disable this behavior, set `close_when_requested` (on the [`WindowPlugin`]) to `false`.
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/// Ensure that you read the caveats documented on that field if doing so.
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///
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/// [`WindowPlugin`]: crate::WindowPlugin
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pub fn exit_on_all_closed(mut app_exit_events: EventWriter<AppExit>, windows: Query<&Window>) {
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if windows.is_empty() {
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bevy_utils::tracing::info!("No windows are open, exiting");
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app_exit_events.send(AppExit);
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}
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}
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/// Exit the application when the primary window has been closed
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///
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/// This system is added by the [`WindowPlugin`]
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///
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/// [`WindowPlugin`]: crate::WindowPlugin
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pub fn exit_on_primary_closed(
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mut app_exit_events: EventWriter<AppExit>,
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windows: Query<(), (With<Window>, With<PrimaryWindow>)>,
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) {
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if windows.is_empty() {
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bevy_utils::tracing::info!("Primary window was closed, exiting");
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app_exit_events.send(AppExit);
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}
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}
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/// Close windows in response to [`WindowCloseRequested`] (e.g. when the close button is pressed).
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///
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/// This system is added by the [`WindowPlugin`] in the default configuration.
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/// To disable this behavior, set `close_when_requested` (on the [`WindowPlugin`]) to `false`.
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/// Ensure that you read the caveats documented on that field if doing so.
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///
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/// [`WindowPlugin`]: crate::WindowPlugin
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pub fn close_when_requested(mut commands: Commands, mut closed: EventReader<WindowCloseRequested>) {
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for event in closed.read() {
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commands.entity(event.window).despawn();
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}
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}
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/// Close the focused window whenever the escape key (<kbd>Esc</kbd>) is pressed
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///
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/// This is useful for examples or prototyping.
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pub fn close_on_esc(
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mut commands: Commands,
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focused_windows: Query<(Entity, &Window)>,
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input: Res<Input<KeyCode>>,
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) {
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for (window, focus) in focused_windows.iter() {
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if !focus.focused {
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continue;
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}
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if input.just_pressed(KeyCode::Escape) {
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commands.entity(window).despawn();
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}
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}
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}
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