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https://github.com/bevyengine/bevy
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81b53d15d4
Resolves #1253 #1562 This makes the Commands apis consistent with World apis. This moves to a "type state" pattern (like World) where the "current entity" is stored in an `EntityCommands` builder. In general this tends to cuts down on indentation and line count. It comes at the cost of needing to type `commands` more and adding more semicolons to terminate expressions. I also added `spawn_bundle` to Commands because this is a common enough operation that I think its worth providing a shorthand.
85 lines
3.1 KiB
Rust
85 lines
3.1 KiB
Rust
use bevy::prelude::*;
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/// This example illustrates how to customize the default window settings
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fn main() {
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App::build()
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.insert_resource(WindowDescriptor {
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width: 500.,
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height: 300.,
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..Default::default()
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})
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.add_plugins(DefaultPlugins)
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.add_startup_system(setup.system())
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.add_system(toggle_override.system())
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.add_system(change_scale_factor.system())
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.run();
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}
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fn setup(
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mut commands: Commands,
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asset_server: Res<AssetServer>,
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mut materials: ResMut<Assets<ColorMaterial>>,
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) {
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// ui camera
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commands.spawn_bundle(UiCameraBundle::default());
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// root node
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commands
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.spawn_bundle(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::default()
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},
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material: materials.add(Color::NONE.into()),
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..Default::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_bundle(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: Rect::all(Val::Px(2.0)),
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..Default::default()
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},
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material: materials.add(Color::rgb(0.65, 0.65, 0.65).into()),
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..Default::default()
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})
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.with_children(|parent| {
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parent.spawn_bundle(TextBundle {
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style: Style {
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align_self: AlignSelf::FlexEnd,
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..Default::default()
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},
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text: Text::with_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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Default::default(),
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),
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..Default::default()
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});
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});
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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: ResMut<Windows>) {
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let window = windows.get_primary_mut().unwrap();
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if input.just_pressed(KeyCode::Return) {
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window.set_scale_factor_override(window.scale_factor_override().xor(Some(1.)));
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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: ResMut<Windows>) {
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let window = windows.get_primary_mut().unwrap();
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if input.just_pressed(KeyCode::Up) {
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window.set_scale_factor_override(window.scale_factor_override().map(|n| n + 1.));
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} else if input.just_pressed(KeyCode::Down) {
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window.set_scale_factor_override(window.scale_factor_override().map(|n| (n - 1.).max(1.)));
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}
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}
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