238 lines
11 KiB
Rust
238 lines
11 KiB
Rust
use bevy::prelude::*;
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/// This example illustrates the various features of Bevy UI.
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fn main() {
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App::build()
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.add_default_plugins()
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.add_startup_system(setup.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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commands
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// ui camera
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.spawn(UiCameraComponents::default())
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// root node
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.spawn(NodeComponents {
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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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parent
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// left vertical fill (border)
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.spawn(NodeComponents {
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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
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// left vertical fill (content)
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.spawn(NodeComponents {
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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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align_items: AlignItems::FlexEnd,
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..Default::default()
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},
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material: materials.add(Color::rgb(0.15, 0.15, 0.15).into()),
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..Default::default()
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})
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.with_children(|parent| {
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// text
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parent.spawn(TextComponents {
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style: Style {
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margin: Rect::all(Val::Px(5.0)),
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..Default::default()
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},
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text: Text {
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value: "Text Example".to_string(),
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font: asset_server
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.load("assets/fonts/FiraSans-Bold.ttf")
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.unwrap(),
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style: TextStyle {
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font_size: 30.0,
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color: Color::WHITE,
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},
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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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// right vertical fill
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.spawn(NodeComponents {
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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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..Default::default()
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},
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material: materials.add(Color::rgb(0.15, 0.15, 0.15).into()),
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..Default::default()
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})
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// absolute positioning
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.spawn(NodeComponents {
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style: Style {
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size: Size::new(Val::Px(200.0), Val::Px(200.0)),
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position_type: PositionType::Absolute,
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position: Rect {
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left: Val::Px(210.0),
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bottom: Val::Px(10.0),
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..Default::default()
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},
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border: Rect::all(Val::Px(20.0)),
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..Default::default()
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},
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material: materials.add(Color::rgb(0.4, 0.4, 1.0).into()),
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..Default::default()
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})
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.with_children(|parent| {
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parent.spawn(NodeComponents {
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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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..Default::default()
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},
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material: materials.add(Color::rgb(0.8, 0.8, 1.0).into()),
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..Default::default()
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});
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})
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// render order test: reddest in the back, whitest in the front (flex center)
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.spawn(NodeComponents {
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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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position_type: PositionType::Absolute,
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align_items: AlignItems::Center,
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justify_content: JustifyContent::Center,
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..Default::default()
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},
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material: materials.add(Color::NONE.into()),
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draw: Draw {
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is_transparent: true,
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..Default::default()
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},
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..Default::default()
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})
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.with_children(|parent| {
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parent
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.spawn(NodeComponents {
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style: Style {
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size: Size::new(Val::Px(100.0), Val::Px(100.0)),
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..Default::default()
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},
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material: materials.add(Color::rgb(1.0, 0.0, 0.0).into()),
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..Default::default()
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})
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.with_children(|parent| {
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parent
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.spawn(NodeComponents {
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style: Style {
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size: Size::new(Val::Px(100.0), Val::Px(100.0)),
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position_type: PositionType::Absolute,
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position: Rect {
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left: Val::Px(20.0),
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bottom: Val::Px(20.0),
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..Default::default()
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},
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..Default::default()
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},
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material: materials.add(Color::rgb(1.0, 0.3, 0.3).into()),
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..Default::default()
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})
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.spawn(NodeComponents {
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style: Style {
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size: Size::new(Val::Px(100.0), Val::Px(100.0)),
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position_type: PositionType::Absolute,
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position: Rect {
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left: Val::Px(40.0),
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bottom: Val::Px(40.0),
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..Default::default()
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},
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..Default::default()
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},
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material: materials.add(Color::rgb(1.0, 0.5, 0.5).into()),
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..Default::default()
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})
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.spawn(NodeComponents {
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style: Style {
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size: Size::new(Val::Px(100.0), Val::Px(100.0)),
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position_type: PositionType::Absolute,
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position: Rect {
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left: Val::Px(60.0),
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bottom: Val::Px(60.0),
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..Default::default()
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},
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..Default::default()
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},
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material: materials.add(Color::rgb(1.0, 0.7, 0.7).into()),
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..Default::default()
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})
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// alpha test
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.spawn(NodeComponents {
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style: Style {
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size: Size::new(Val::Px(100.0), Val::Px(100.0)),
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position_type: PositionType::Absolute,
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position: Rect {
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left: Val::Px(80.0),
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bottom: Val::Px(80.0),
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..Default::default()
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},
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..Default::default()
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},
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material: materials.add(Color::rgba(1.0, 0.9, 0.9, 0.4).into()),
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draw: Draw {
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is_transparent: true,
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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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// bevy logo (flex center)
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.spawn(NodeComponents {
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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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position_type: PositionType::Absolute,
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justify_content: JustifyContent::Center,
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align_items: AlignItems::FlexEnd,
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..Default::default()
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},
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material: materials.add(Color::NONE.into()),
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draw: Draw {
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is_transparent: true,
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..Default::default()
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},
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..Default::default()
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})
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.with_children(|parent| {
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// bevy logo (image)
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parent.spawn(ImageComponents {
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style: Style {
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size: Size::new(Val::Px(500.0), Val::Auto),
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..Default::default()
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},
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material: materials.add(
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asset_server
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.load("assets/branding/bevy_logo_dark_big.png")
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.unwrap()
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.into(),
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),
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draw: Draw {
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is_transparent: true,
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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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