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https://github.com/bevyengine/bevy
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e0c296ee14
> Follow up to #11600 and #10588 @mockersf expressed some [valid concerns](https://github.com/bevyengine/bevy/pull/11600#issuecomment-1932796498) about the current system this PR attempts to fix: The `ComputedTextureSlices` reacts to asset change in both `bevy_sprite` and `bevy_ui`, meaning that if the `ImageScaleMode` is inserted by default in the bundles, we will iterate through most 2d items every time an asset is updated. # Solution - `ImageScaleMode` only has two variants: `Sliced` and `Tiled`. I removed the `Stretched` default - `ImageScaleMode` is no longer part of any bundle, but the relevant bundles explain that this additional component can be inserted This way, the *absence* of `ImageScaleMode` means the image will be stretched, and its *presence* will include the entity to the various slicing systems Optional components in bundles would make this more straigthfoward # Additional work Should I add new bundles with the `ImageScaleMode` component ?
90 lines
3.4 KiB
Rust
90 lines
3.4 KiB
Rust
//! This example illustrates how to create a button that has its image sliced
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//! and kept in proportion instead of being stretched by the button dimensions
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use bevy::{prelude::*, winit::WinitSettings};
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fn main() {
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App::new()
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.add_plugins(DefaultPlugins)
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// Only run the app when there is user input. This will significantly reduce CPU/GPU use.
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.insert_resource(WinitSettings::desktop_app())
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.add_systems(Startup, setup)
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.add_systems(Update, button_system)
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.run();
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}
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fn button_system(
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mut interaction_query: Query<(&Interaction, &Children), (Changed<Interaction>, With<Button>)>,
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mut text_query: Query<&mut Text>,
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) {
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for (interaction, children) in &mut interaction_query {
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let mut text = text_query.get_mut(children[0]).unwrap();
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match *interaction {
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Interaction::Pressed => {
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text.sections[0].value = "Press".to_string();
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}
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Interaction::Hovered => {
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text.sections[0].value = "Hover".to_string();
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}
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Interaction::None => {
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text.sections[0].value = "Button".to_string();
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}
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}
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}
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}
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fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
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let image = asset_server.load("textures/fantasy_ui_borders/panel-border-010.png");
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let slicer = TextureSlicer {
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border: BorderRect::square(22.0),
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center_scale_mode: SliceScaleMode::Stretch,
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sides_scale_mode: SliceScaleMode::Stretch,
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max_corner_scale: 1.0,
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};
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// ui camera
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commands.spawn(Camera2dBundle::default());
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commands
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.spawn(NodeBundle {
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style: Style {
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width: Val::Percent(100.0),
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height: Val::Percent(100.0),
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align_items: AlignItems::Center,
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justify_content: JustifyContent::Center,
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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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for [w, h] in [[150.0, 150.0], [300.0, 150.0], [150.0, 300.0]] {
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parent
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.spawn((
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ButtonBundle {
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style: Style {
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width: Val::Px(w),
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height: Val::Px(h),
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// horizontally center child text
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justify_content: JustifyContent::Center,
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// vertically center child text
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align_items: AlignItems::Center,
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margin: UiRect::all(Val::Px(20.0)),
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..default()
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},
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image: image.clone().into(),
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..default()
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},
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ImageScaleMode::Sliced(slicer.clone()),
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))
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.with_children(|parent| {
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parent.spawn(TextBundle::from_section(
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"Button",
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TextStyle {
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font: asset_server.load("fonts/FiraSans-Bold.ttf"),
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font_size: 40.0,
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color: Color::rgb(0.9, 0.9, 0.9),
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},
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));
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});
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}
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});
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}
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