eaac730617
# Objective `Size::width` sets the `height` field to `Val::DEFAULT` which is `Val::Undefined`, but the default for `Size` `height` is `Val::Auto`. `Size::height` has the same problem, but with the `width` field. The UI examples specify numeric values in many places where they could either be elided or replaced by composition of the Flex enum properties. related: https://github.com/bevyengine/bevy/pull/7468 fixes: https://github.com/bevyengine/bevy/issues/6498 ## Solution Change `Size::width` so it sets `height` to `Val::AUTO` and change `Size::height` so it sets `width` to `Val::AUTO`. Added some tests so this doesn't happen again. ## Changelog Changed `Size::width` so it sets the `height` to `Val::AUTO`. Changed `Size::height` so it sets the `width` to `Val::AUTO`. Added tests to `geometry.rs` for `Size` and `UiRect` to ensure correct behaviour. Simplified the UI examples. Replaced numeric values with the Flex property enums or elided them where possible, and removed the remaining use of auto margins. ## Migration Guide The `Size::width` constructor function now sets the `height` to `Val::Auto` instead of `Val::Undefined`. The `Size::height` constructor function now sets the `width` to `Val::Auto` instead of `Val::Undefined`.
79 lines
2.8 KiB
Rust
79 lines
2.8 KiB
Rust
//! Demonstrates how to use transparency with UI.
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//! Shows two colored buttons with transparent text.
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use bevy::prelude::*;
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fn main() {
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App::new()
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.insert_resource(ClearColor(Color::BLACK))
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.add_plugins(DefaultPlugins)
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.add_startup_system(setup)
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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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commands.spawn(Camera2dBundle::default());
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let font_handle = asset_server.load("fonts/FiraSans-Bold.ttf");
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commands
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.spawn(NodeBundle {
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style: Style {
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size: Size::width(Val::Percent(100.0)),
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align_items: AlignItems::Center,
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justify_content: JustifyContent::SpaceAround,
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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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parent
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.spawn(ButtonBundle {
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style: Style {
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size: Size::new(Val::Px(150.0), Val::Px(65.0)),
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justify_content: JustifyContent::Center,
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align_items: AlignItems::Center,
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..default()
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},
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background_color: Color::rgb(0.1, 0.5, 0.1).into(),
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..default()
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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 1",
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TextStyle {
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font: font_handle.clone(),
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font_size: 40.0,
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// Alpha channel of the color controls transparency.
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color: Color::rgba(1.0, 1.0, 1.0, 0.2),
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},
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));
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});
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// Button with a different color,
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// to demonstrate the text looks different due to its transparency.
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parent
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.spawn(ButtonBundle {
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style: Style {
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size: Size::new(Val::Px(150.0), Val::Px(65.0)),
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justify_content: JustifyContent::Center,
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align_items: AlignItems::Center,
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..default()
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},
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background_color: Color::rgb(0.5, 0.1, 0.5).into(),
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..default()
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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 2",
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TextStyle {
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font: font_handle.clone(),
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font_size: 40.0,
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// Alpha channel of the color controls transparency.
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color: Color::rgba(1.0, 1.0, 1.0, 0.2),
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},
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));
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});
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});
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}
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