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ui: improve button example

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This commit is contained in:
Carter Anderson 2020-07-18 14:36:31 -07:00
parent f0fc380a39
commit a531c906a6
1 changed files with 48 additions and 12 deletions
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60
examples/ui/button.rs
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@ -3,33 +3,69 @@ use bevy::prelude::*;
fn main() {
App::build()
.add_default_plugins()
.init_resource::<ButtonMaterials>()
.add_startup_system(setup.system())
.add_system(button_system.system())
.run();
}
struct ButtonMaterials {
normal: Handle<ColorMaterial>,
hovered: Handle<ColorMaterial>,
pressed: Handle<ColorMaterial>,
}
impl FromResources for ButtonMaterials {
fn from_resources(resources: &Resources) -> Self {
let mut materials = resources.get_mut::<Assets<ColorMaterial>>().unwrap();
ButtonMaterials {
normal: materials.add(Color::rgb(0.02, 0.02, 0.02).into()),
hovered: materials.add(Color::rgb(0.05, 0.05, 0.05).into()),
pressed: materials.add(Color::rgb(0.1, 0.5, 0.1).into()),
}
}
}
fn button_system(
mut click_query: Query<(&Button, Changed<Click>)>,
mut hover_query: Query<(&Button, Changed<Hover>)>,
button_materials: Res<ButtonMaterials>,
mut click_query: Query<(
&Button,
Changed<Click>,
&mut Handle<ColorMaterial>,
&Children,
)>,
mut hover_query: Query<(
&Button,
Changed<Hover>,
&mut Handle<ColorMaterial>,
&Children,
)>,
label_query: Query<&mut Label>,
) {
for (_button, click) in &mut click_query.iter() {
for (_button, click, mut material, children) in &mut click_query.iter() {
let mut label = label_query.get_mut::<Label>(children[0]).unwrap();
match *click {
Click::Pressed => {
println!("pressed");
label.text = "Press".to_string();
*material = button_materials.pressed;
}
Click::Released => {
println!("released");
label.text = "Button".to_string();
*material = button_materials.normal;
}
}
}
for (_button, hover) in &mut hover_query.iter() {
for (_button, hover, mut material, children) in &mut hover_query.iter() {
let mut label = label_query.get_mut::<Label>(children[0]).unwrap();
match *hover {
Hover::Hovered => {
println!("hovered");
label.text = "Hover".to_string();
*material = button_materials.hovered;
}
Hover::NotHovered => {
println!("unhovered");
label.text = "Button".to_string();
*material = button_materials.normal;
}
}
}
@ -38,14 +74,14 @@ fn button_system(
fn setup(
mut commands: Commands,
asset_server: Res<AssetServer>,
mut materials: ResMut<Assets<ColorMaterial>>,
button_materials: Res<ButtonMaterials>,
) {
commands
// ui camera
.spawn(OrthographicCameraComponents::default())
.spawn(ButtonComponents {
node: Node::new(Anchors::BOTTOM_LEFT, Margins::new(10.0, 160.0, 10.0, 80.0)),
material: materials.add(Color::rgb(0.2, 0.8, 0.2).into()),
node: Node::new(Anchors::CENTER, Margins::new(-75.0, 75.0, -35.0, 35.0)),
material: button_materials.normal,
..Default::default()
})
.with_children(|parent| {
@ -56,7 +92,7 @@ fn setup(
font: asset_server.load("assets/fonts/FiraSans-Bold.ttf").unwrap(),
style: TextStyle {
font_size: 40.0,
color: Color::rgb(0.1, 0.1, 0.1),
color: Color::rgb(0.8, 0.8, 0.8),
},
},
..Default::default()