Support Warning
WebGPU is currently only supported on Chrome starting with version 113, and only on desktop. If they don't work on your configuration, you can check the WebGL2 examples
here.
#![allow(clippy::type_complexity)]
use bevy::{prelude::*, winit::WinitSettings};
fn main() {
App::new()
.add_plugins(DefaultPlugins)
.insert_resource(WinitSettings::desktop_app())
.add_systems(Startup, setup)
.add_systems(Update, button_system)
.run();
}
const NORMAL_BUTTON: Color = Color::rgb(0.15, 0.15, 0.15);
const HOVERED_BUTTON: Color = Color::rgb(0.25, 0.25, 0.25);
const PRESSED_BUTTON: Color = Color::rgb(0.35, 0.75, 0.35);
fn button_system(
mut interaction_query: Query<
(
&Interaction,
&mut BackgroundColor,
&mut BorderColor,
&Children,
),
(Changed<Interaction>, With<Button>),
>,
mut text_query: Query<&mut Text>,
) {
for (interaction, mut color, mut border_color, children) in &mut interaction_query {
let mut text = text_query.get_mut(children[0]).unwrap();
match *interaction {
Interaction::Pressed => {
text.sections[0].value = "Press".to_string();
*color = PRESSED_BUTTON.into();
border_color.0 = Color::RED;
}
Interaction::Hovered => {
text.sections[0].value = "Hover".to_string();
*color = HOVERED_BUTTON.into();
border_color.0 = Color::WHITE;
}
Interaction::None => {
text.sections[0].value = "Button".to_string();
*color = NORMAL_BUTTON.into();
border_color.0 = Color::BLACK;
}
}
}
}
fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
commands.spawn(Camera2dBundle::default());
commands
.spawn(NodeBundle {
style: Style {
width: Val::Percent(100.0),
height: Val::Percent(100.0),
align_items: AlignItems::Center,
justify_content: JustifyContent::Center,
..default()
},
..default()
})
.with_children(|parent| {
parent
.spawn(ButtonBundle {
style: Style {
width: Val::Px(150.0),
height: Val::Px(65.0),
border: UiRect::all(Val::Px(5.0)),
justify_content: JustifyContent::Center,
align_items: AlignItems::Center,
..default()
},
border_color: BorderColor(Color::BLACK),
background_color: NORMAL_BUTTON.into(),
..default()
})
.with_children(|parent| {
parent.spawn(TextBundle::from_section(
"Button",
TextStyle {
font: asset_server.load("fonts/FiraSans-Bold.ttf"),
font_size: 40.0,
color: Color::rgb(0.9, 0.9, 0.9),
},
));
});
});
}