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text_debug.rs
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text_debug.rs
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use bevy::prelude::*;
extern crate rand;
/// This example is for debugging text layout
fn main() {
App::build()
.add_plugins(DefaultPlugins)
.add_startup_system(infotext_system)
.add_system(change_text_system)
.run();
}
struct TextChanges;
fn infotext_system(commands: &mut Commands, asset_server: Res<AssetServer>) {
let font = asset_server.load("fonts/FiraSans-Bold.ttf");
commands.spawn(UiCameraBundle::default()).spawn(TextBundle {
style: Style {
align_self: AlignSelf::FlexEnd,
position_type: PositionType::Absolute,
position: Rect {
top: Val::Px(5.0),
left: Val::Px(15.0),
..Default::default()
},
..Default::default()
},
text: Text {
value: "This is\ntext with\nline breaks\nin the top left".to_string(),
font: font.clone(),
style: TextStyle {
font_size: 50.0,
color: Color::WHITE,
alignment: TextAlignment::default(),
},
},
..Default::default()
});
commands.spawn(UiCameraBundle::default()).spawn(TextBundle {
style: Style {
align_self: AlignSelf::FlexEnd,
position_type: PositionType::Absolute,
position: Rect {
top: Val::Px(5.0),
right: Val::Px(15.0),
..Default::default()
},
max_size: Size {
width: Val::Px(400.),
height: Val::Undefined,
},
..Default::default()
},
text: Text {
value: "This is very long text with limited width in the top right and is also pink"
.to_string(),
font: font.clone(),
style: TextStyle {
font_size: 50.0,
color: Color::rgb(0.8, 0.2, 0.7),
alignment: TextAlignment {
horizontal: HorizontalAlign::Center,
vertical: VerticalAlign::Center,
},
},
},
..Default::default()
});
commands
.spawn(UiCameraBundle::default())
.spawn(TextBundle {
style: Style {
align_self: AlignSelf::FlexEnd,
position_type: PositionType::Absolute,
position: Rect {
bottom: Val::Px(5.0),
right: Val::Px(15.0),
..Default::default()
},
..Default::default()
},
text: Text {
value: "This text changes in the bottom right".to_string(),
font: font.clone(),
style: TextStyle {
font_size: 50.0,
color: Color::WHITE,
alignment: TextAlignment::default(),
},
},
..Default::default()
})
.with(TextChanges);
commands.spawn(UiCameraBundle::default()).spawn(TextBundle {
style: Style {
align_self: AlignSelf::FlexEnd,
position_type: PositionType::Absolute,
position: Rect {
bottom: Val::Px(5.0),
left: Val::Px(15.0),
..Default::default()
},
size: Size {
width: Val::Px(200.0),
..Default::default()
},
..Default::default()
},
text: Text {
value: "This\ntext has\nline breaks and also a set width in the bottom left"
.to_string(),
font,
style: TextStyle {
font_size: 50.0,
color: Color::WHITE,
alignment: TextAlignment::default(),
},
},
..Default::default()
});
}
fn change_text_system(mut query: Query<(&mut Text, &TextChanges)>) {
for (mut text, _text_changes) in query.iter_mut() {
text.value = format!(
"This text changes in the bottom right {}",
rand::random::<u16>(),
);
}
}