bevy/examples/window/scale_factor_override.rs
Carter Anderson 11b41206eb Add upstream bevy_ecs and prepare for custom-shaders merge (#2815)
This updates the `pipelined-rendering` branch to use the latest `bevy_ecs` from `main`. This accomplishes a couple of goals:

1. prepares for upcoming `custom-shaders` branch changes, which were what drove many of the recent bevy_ecs changes on `main`
2. prepares for the soon-to-happen merge of `pipelined-rendering` into `main`. By including bevy_ecs changes now, we make that merge simpler / easier to review. 

I split this up into 3 commits:

1. **add upstream bevy_ecs**: please don't bother reviewing this content. it has already received thorough review on `main` and is a literal copy/paste of the relevant folders (the old folders were deleted so the directories are literally exactly the same as `main`).
2. **support manual buffer application in stages**: this is used to enable the Extract step. we've already reviewed this once on the `pipelined-rendering` branch, but its worth looking at one more time in the new context of (1).
3. **support manual archetype updates in QueryState**: same situation as (2).
2021-09-14 06:14:19 +00:00

85 lines
3.1 KiB
Rust

use bevy::prelude::*;
/// This example illustrates how to customize the default window settings
fn main() {
App::new()
.insert_resource(WindowDescriptor {
width: 500.,
height: 300.,
..Default::default()
})
.add_plugins(DefaultPlugins)
.add_startup_system(setup)
.add_system(toggle_override)
.add_system(change_scale_factor)
.run();
}
fn setup(
mut commands: Commands,
asset_server: Res<AssetServer>,
mut materials: ResMut<Assets<ColorMaterial>>,
) {
// ui camera
commands.spawn_bundle(UiCameraBundle::default());
// root node
commands
.spawn_bundle(NodeBundle {
style: Style {
size: Size::new(Val::Percent(100.0), Val::Percent(100.0)),
justify_content: JustifyContent::SpaceBetween,
..Default::default()
},
material: materials.add(Color::NONE.into()),
..Default::default()
})
.with_children(|parent| {
// left vertical fill (border)
parent
.spawn_bundle(NodeBundle {
style: Style {
size: Size::new(Val::Px(200.0), Val::Percent(100.0)),
border: Rect::all(Val::Px(2.0)),
..Default::default()
},
material: materials.add(Color::rgb(0.65, 0.65, 0.65).into()),
..Default::default()
})
.with_children(|parent| {
parent.spawn_bundle(TextBundle {
style: Style {
align_self: AlignSelf::FlexEnd,
..Default::default()
},
text: Text::with_section(
"Example text",
TextStyle {
font: asset_server.load("fonts/FiraSans-Bold.ttf"),
font_size: 30.0,
color: Color::WHITE,
},
Default::default(),
),
..Default::default()
});
});
});
}
/// This system toggles scale factor overrides when enter is pressed
fn toggle_override(input: Res<Input<KeyCode>>, mut windows: ResMut<Windows>) {
let window = windows.get_primary_mut().unwrap();
if input.just_pressed(KeyCode::Return) {
window.set_scale_factor_override(window.scale_factor_override().xor(Some(1.)));
}
}
/// This system changes the scale factor override when up or down is pressed
fn change_scale_factor(input: Res<Input<KeyCode>>, mut windows: ResMut<Windows>) {
let window = windows.get_primary_mut().unwrap();
if input.just_pressed(KeyCode::Up) {
window.set_scale_factor_override(window.scale_factor_override().map(|n| n + 1.));
} else if input.just_pressed(KeyCode::Down) {
window.set_scale_factor_override(window.scale_factor_override().map(|n| (n - 1.).max(1.)));
}
}