ddfafab971
# Objective Fix https://github.com/bevyengine/bevy/issues/4530 - Make it easier to open/close/modify windows by setting them up as `Entity`s with a `Window` component. - Make multiple windows very simple to set up. (just add a `Window` component to an entity and it should open) ## Solution - Move all properties of window descriptor to ~components~ a component. - Replace `WindowId` with `Entity`. - ~Use change detection for components to update backend rather than events/commands. (The `CursorMoved`/`WindowResized`/... events are kept for user convenience.~ Check each field individually to see what we need to update, events are still kept for user convenience. --- ## Changelog - `WindowDescriptor` renamed to `Window`. - Width/height consolidated into a `WindowResolution` component. - Requesting maximization/minimization is done on the [`Window::state`] field. - `WindowId` is now `Entity`. ## Migration Guide - Replace `WindowDescriptor` with `Window`. - Change `width` and `height` fields in a `WindowResolution`, either by doing ```rust WindowResolution::new(width, height) // Explicitly // or using From<_> for tuples for convenience (1920., 1080.).into() ``` - Replace any `WindowCommand` code to just modify the `Window`'s fields directly and creating/closing windows is now by spawning/despawning an entity with a `Window` component like so: ```rust let window = commands.spawn(Window { ... }).id(); // open window commands.entity(window).despawn(); // close window ``` ## Unresolved - ~How do we tell when a window is minimized by a user?~ ~Currently using the `Resize(0, 0)` as an indicator of minimization.~ No longer attempting to tell given how finnicky this was across platforms, now the user can only request that a window be maximized/minimized. ## Future work - Move `exit_on_close` functionality out from windowing and into app(?) - https://github.com/bevyengine/bevy/issues/5621 - https://github.com/bevyengine/bevy/issues/7099 - https://github.com/bevyengine/bevy/issues/7098 Co-authored-by: Carter Anderson <mcanders1@gmail.com>
102 lines
3.5 KiB
Rust
102 lines
3.5 KiB
Rust
//! This example illustrates how to override the window scale factor imposed by the
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//! operating system.
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use bevy::{prelude::*, window::WindowResolution};
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins.set(WindowPlugin {
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primary_window: Some(Window {
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resolution: WindowResolution::new(500., 300.).with_scale_factor_override(1.0),
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..default()
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}),
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..default()
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}))
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.add_startup_system(setup)
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.add_system(display_override)
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.add_system(toggle_override)
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.add_system(change_scale_factor)
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.run();
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}
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fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
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// camera
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commands.spawn(Camera2dBundle::default());
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// root node
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commands
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.spawn(NodeBundle {
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style: Style {
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size: Size::new(Val::Percent(100.0), Val::Percent(100.0)),
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justify_content: JustifyContent::SpaceBetween,
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..default()
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},
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..default()
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})
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.with_children(|parent| {
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// left vertical fill (border)
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parent
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.spawn(NodeBundle {
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style: Style {
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size: Size::new(Val::Px(200.0), Val::Percent(100.0)),
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border: UiRect::all(Val::Px(2.0)),
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..default()
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},
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background_color: Color::rgb(0.65, 0.65, 0.65).into(),
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..default()
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})
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.with_children(|parent| {
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parent.spawn(
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TextBundle::from_section(
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"Example text",
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TextStyle {
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font: asset_server.load("fonts/FiraSans-Bold.ttf"),
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font_size: 30.0,
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color: Color::WHITE,
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},
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)
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.with_style(Style {
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align_self: AlignSelf::FlexEnd,
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..default()
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}),
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);
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});
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});
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}
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/// Set the title of the window to the current override
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fn display_override(mut windows: Query<&mut Window>) {
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let mut window = windows.single_mut();
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window.title = format!(
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"Scale override: {:?}",
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window.resolution.scale_factor_override()
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);
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}
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/// This system toggles scale factor overrides when enter is pressed
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fn toggle_override(input: Res<Input<KeyCode>>, mut windows: Query<&mut Window>) {
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let mut window = windows.single_mut();
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if input.just_pressed(KeyCode::Return) {
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let scale_factor_override = window.resolution.scale_factor_override();
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window
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.resolution
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.set_scale_factor_override(scale_factor_override.xor(Some(1.0)));
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}
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}
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/// This system changes the scale factor override when up or down is pressed
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fn change_scale_factor(input: Res<Input<KeyCode>>, mut windows: Query<&mut Window>) {
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let mut window = windows.single_mut();
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let scale_factor_override = window.resolution.scale_factor_override();
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if input.just_pressed(KeyCode::Up) {
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window
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.resolution
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.set_scale_factor_override(scale_factor_override.map(|n| n + 1.0));
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} else if input.just_pressed(KeyCode::Down) {
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window
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.resolution
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.set_scale_factor_override(scale_factor_override.map(|n| (n - 1.0).max(1.0)));
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}
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}
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