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https://github.com/bevyengine/bevy
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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`.
80 lines
2.7 KiB
Rust
80 lines
2.7 KiB
Rust
//! Showcases the `RelativeCursorPosition` component, used to check the position of the cursor relative to a UI node.
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use bevy::{prelude::*, ui::RelativeCursorPosition, 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_startup_system(setup)
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.add_system(relative_cursor_position_system)
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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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commands
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.spawn(NodeBundle {
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style: Style {
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size: Size::width(Val::Percent(100.)),
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align_items: AlignItems::Center,
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justify_content: JustifyContent::Center,
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flex_direction: FlexDirection::Column,
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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(NodeBundle {
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style: Style {
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size: Size::all(Val::Px(250.0)),
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margin: UiRect::bottom(Val::Px(15.)),
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..default()
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},
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background_color: Color::rgb(235., 35., 12.).into(),
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..default()
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})
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.insert(RelativeCursorPosition::default());
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parent.spawn(TextBundle {
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text: Text::from_section(
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"(0.0, 0.0)",
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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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..default()
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});
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});
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}
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/// This systems polls the relative cursor position and displays its value in a text component.
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fn relative_cursor_position_system(
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relative_cursor_position_query: Query<&RelativeCursorPosition>,
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mut output_query: Query<&mut Text>,
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) {
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let relative_cursor_position = relative_cursor_position_query.single();
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let mut output = output_query.single_mut();
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output.sections[0].value =
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if let Some(relative_cursor_position) = relative_cursor_position.normalized {
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format!(
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"({:.1}, {:.1})",
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relative_cursor_position.x, relative_cursor_position.y
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)
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} else {
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"unknown".to_string()
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};
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output.sections[0].style.color = if relative_cursor_position.mouse_over() {
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Color::rgb(0.1, 0.9, 0.1)
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} else {
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Color::rgb(0.9, 0.1, 0.1)
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};
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}
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