mirror of
https://github.com/bevyengine/bevy
synced 2024-11-25 22:20:20 +00:00
c66c2c7420
# Objective In a few examples, we're specifying a font or font size that is the same as the current default value. Might as well use the default. That'll be one less thing to worry about if we ever need to change the default font size. (wink) In a few others, we were using a value of `25.0` and it didn't seem like it was different for an important reason, so I switched to the default there too. (There are a bunch of examples that use non-default font sizes for various reasons. Not trying address them all here.)
493 lines
21 KiB
Rust
493 lines
21 KiB
Rust
//! Demonstrates how Display and Visibility work in the UI.
|
|
|
|
use bevy::winit::WinitSettings;
|
|
use bevy::{
|
|
color::palettes::css::{DARK_GRAY, YELLOW},
|
|
prelude::*,
|
|
};
|
|
|
|
const PALETTE: [&str; 4] = ["27496D", "466B7A", "669DB3", "ADCBE3"];
|
|
const HIDDEN_COLOR: Color = Color::srgb(1.0, 0.7, 0.7);
|
|
|
|
fn main() {
|
|
App::new()
|
|
.add_plugins(DefaultPlugins)
|
|
// Only run the app when there is user input. This will significantly reduce CPU/GPU use.
|
|
.insert_resource(WinitSettings::desktop_app())
|
|
.add_systems(Startup, setup)
|
|
.add_systems(
|
|
Update,
|
|
(
|
|
buttons_handler::<Display>,
|
|
buttons_handler::<Visibility>,
|
|
text_hover,
|
|
),
|
|
)
|
|
.run();
|
|
}
|
|
|
|
#[derive(Component)]
|
|
struct Target<T> {
|
|
id: Entity,
|
|
phantom: std::marker::PhantomData<T>,
|
|
}
|
|
|
|
impl<T> Target<T> {
|
|
fn new(id: Entity) -> Self {
|
|
Self {
|
|
id,
|
|
phantom: std::marker::PhantomData,
|
|
}
|
|
}
|
|
}
|
|
|
|
trait TargetUpdate {
|
|
type TargetComponent: Component;
|
|
const NAME: &'static str;
|
|
fn update_target(&self, target: &mut Self::TargetComponent) -> String;
|
|
}
|
|
|
|
impl TargetUpdate for Target<Display> {
|
|
type TargetComponent = Style;
|
|
const NAME: &'static str = "Display";
|
|
fn update_target(&self, style: &mut Self::TargetComponent) -> String {
|
|
style.display = match style.display {
|
|
Display::Flex => Display::None,
|
|
Display::None => Display::Flex,
|
|
Display::Block | Display::Grid => unreachable!(),
|
|
};
|
|
format!("{}::{:?} ", Self::NAME, style.display)
|
|
}
|
|
}
|
|
|
|
impl TargetUpdate for Target<Visibility> {
|
|
type TargetComponent = Visibility;
|
|
const NAME: &'static str = "Visibility";
|
|
fn update_target(&self, visibility: &mut Self::TargetComponent) -> String {
|
|
*visibility = match *visibility {
|
|
Visibility::Inherited => Visibility::Visible,
|
|
Visibility::Visible => Visibility::Hidden,
|
|
Visibility::Hidden => Visibility::Inherited,
|
|
};
|
|
format!("{}::{visibility:?}", Self::NAME)
|
|
}
|
|
}
|
|
|
|
fn setup(mut commands: Commands, asset_server: Res<AssetServer>) {
|
|
let palette: [Color; 4] = PALETTE.map(|hex| Srgba::hex(hex).unwrap().into());
|
|
|
|
let text_style = TextStyle {
|
|
font: asset_server.load("fonts/FiraSans-Bold.ttf"),
|
|
..default()
|
|
};
|
|
|
|
commands.spawn(Camera2dBundle::default());
|
|
commands.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Percent(100.),
|
|
height: Val::Percent(100.),
|
|
flex_direction: FlexDirection::Column,
|
|
align_items: AlignItems::Center,
|
|
justify_content: JustifyContent::SpaceEvenly,
|
|
..Default::default()
|
|
},
|
|
background_color: BackgroundColor(Color::BLACK),
|
|
..Default::default()
|
|
}).with_children(|parent| {
|
|
parent.spawn(TextBundle {
|
|
text: Text::from_section(
|
|
"Use the panel on the right to change the Display and Visibility properties for the respective nodes of the panel on the left",
|
|
text_style.clone(),
|
|
).with_justify(JustifyText::Center),
|
|
style: Style {
|
|
margin: UiRect::bottom(Val::Px(10.)),
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
});
|
|
|
|
parent
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Percent(100.),
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
})
|
|
.with_children(|parent| {
|
|
let mut target_ids = vec![];
|
|
parent.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Percent(50.),
|
|
height: Val::Px(520.),
|
|
justify_content: JustifyContent::Center,
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
}).with_children(|parent| {
|
|
target_ids = spawn_left_panel(parent, &palette);
|
|
});
|
|
|
|
parent.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Percent(50.),
|
|
justify_content: JustifyContent::Center,
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
}).with_children(|parent| {
|
|
spawn_right_panel(parent, text_style, &palette, target_ids);
|
|
});
|
|
});
|
|
|
|
parent.spawn(NodeBundle {
|
|
style: Style {
|
|
flex_direction: FlexDirection::Row,
|
|
align_items: AlignItems::Start,
|
|
justify_content: JustifyContent::Start,
|
|
column_gap: Val::Px(10.),
|
|
..Default::default()
|
|
},
|
|
..default() })
|
|
.with_children(|builder| {
|
|
let text_style = TextStyle {
|
|
font: asset_server.load("fonts/FiraSans-Bold.ttf"),
|
|
..default()
|
|
};
|
|
|
|
builder.spawn(TextBundle {
|
|
text: Text::from_section(
|
|
"Display::None\nVisibility::Hidden\nVisibility::Inherited",
|
|
TextStyle { color: HIDDEN_COLOR, ..text_style.clone() }
|
|
).with_justify(JustifyText::Center),
|
|
..Default::default()
|
|
});
|
|
builder.spawn(TextBundle {
|
|
text: Text::from_section(
|
|
"-\n-\n-",
|
|
TextStyle { color: DARK_GRAY.into(), ..text_style.clone() }
|
|
).with_justify(JustifyText::Center),
|
|
..Default::default()
|
|
});
|
|
builder.spawn(TextBundle::from_section(
|
|
"The UI Node and its descendants will not be visible and will not be allotted any space in the UI layout.\nThe UI Node will not be visible but will still occupy space in the UI layout.\nThe UI node will inherit the visibility property of its parent. If it has no parent it will be visible.",
|
|
text_style
|
|
));
|
|
});
|
|
});
|
|
}
|
|
|
|
fn spawn_left_panel(builder: &mut ChildBuilder, palette: &[Color; 4]) -> Vec<Entity> {
|
|
let mut target_ids = vec![];
|
|
builder
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
padding: UiRect::all(Val::Px(10.)),
|
|
..Default::default()
|
|
},
|
|
background_color: BackgroundColor(Color::WHITE),
|
|
..Default::default()
|
|
})
|
|
.with_children(|parent| {
|
|
parent
|
|
.spawn(NodeBundle {
|
|
background_color: BackgroundColor(Color::BLACK),
|
|
..Default::default()
|
|
})
|
|
.with_children(|parent| {
|
|
let id = parent
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
align_items: AlignItems::FlexEnd,
|
|
justify_content: JustifyContent::FlexEnd,
|
|
..Default::default()
|
|
},
|
|
background_color: BackgroundColor(palette[0]),
|
|
..Default::default()
|
|
})
|
|
.with_children(|parent| {
|
|
parent.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Px(100.),
|
|
height: Val::Px(500.),
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
});
|
|
|
|
let id = parent
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
height: Val::Px(400.),
|
|
align_items: AlignItems::FlexEnd,
|
|
justify_content: JustifyContent::FlexEnd,
|
|
..Default::default()
|
|
},
|
|
background_color: BackgroundColor(palette[1]),
|
|
..Default::default()
|
|
})
|
|
.with_children(|parent| {
|
|
parent.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Px(100.),
|
|
height: Val::Px(400.),
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
});
|
|
|
|
let id = parent
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
height: Val::Px(300.),
|
|
align_items: AlignItems::FlexEnd,
|
|
justify_content: JustifyContent::FlexEnd,
|
|
..Default::default()
|
|
},
|
|
background_color: BackgroundColor(palette[2]),
|
|
..Default::default()
|
|
})
|
|
.with_children(|parent| {
|
|
parent.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Px(100.),
|
|
height: Val::Px(300.),
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
});
|
|
|
|
let id = parent
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Px(200.),
|
|
height: Val::Px(200.),
|
|
..Default::default()
|
|
},
|
|
background_color: BackgroundColor(palette[3]),
|
|
..Default::default()
|
|
})
|
|
.id();
|
|
target_ids.push(id);
|
|
})
|
|
.id();
|
|
target_ids.push(id);
|
|
})
|
|
.id();
|
|
target_ids.push(id);
|
|
})
|
|
.id();
|
|
target_ids.push(id);
|
|
});
|
|
});
|
|
target_ids
|
|
}
|
|
|
|
fn spawn_right_panel(
|
|
parent: &mut ChildBuilder,
|
|
text_style: TextStyle,
|
|
palette: &[Color; 4],
|
|
mut target_ids: Vec<Entity>,
|
|
) {
|
|
let spawn_buttons = |parent: &mut ChildBuilder, target_id| {
|
|
spawn_button::<Display>(parent, text_style.clone(), target_id);
|
|
spawn_button::<Visibility>(parent, text_style.clone(), target_id);
|
|
};
|
|
parent
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
padding: UiRect::all(Val::Px(10.)),
|
|
..Default::default()
|
|
},
|
|
background_color: BackgroundColor(Color::WHITE),
|
|
..Default::default()
|
|
})
|
|
.with_children(|parent| {
|
|
parent
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Px(500.),
|
|
height: Val::Px(500.),
|
|
flex_direction: FlexDirection::Column,
|
|
align_items: AlignItems::FlexEnd,
|
|
justify_content: JustifyContent::SpaceBetween,
|
|
padding: UiRect {
|
|
left: Val::Px(5.),
|
|
top: Val::Px(5.),
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
},
|
|
background_color: BackgroundColor(palette[0]),
|
|
..Default::default()
|
|
})
|
|
.with_children(|parent| {
|
|
spawn_buttons(parent, target_ids.pop().unwrap());
|
|
|
|
parent
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Px(400.),
|
|
height: Val::Px(400.),
|
|
flex_direction: FlexDirection::Column,
|
|
align_items: AlignItems::FlexEnd,
|
|
justify_content: JustifyContent::SpaceBetween,
|
|
padding: UiRect {
|
|
left: Val::Px(5.),
|
|
top: Val::Px(5.),
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
},
|
|
background_color: BackgroundColor(palette[1]),
|
|
..Default::default()
|
|
})
|
|
.with_children(|parent| {
|
|
spawn_buttons(parent, target_ids.pop().unwrap());
|
|
|
|
parent
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Px(300.),
|
|
height: Val::Px(300.),
|
|
flex_direction: FlexDirection::Column,
|
|
align_items: AlignItems::FlexEnd,
|
|
justify_content: JustifyContent::SpaceBetween,
|
|
padding: UiRect {
|
|
left: Val::Px(5.),
|
|
top: Val::Px(5.),
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
},
|
|
background_color: BackgroundColor(palette[2]),
|
|
..Default::default()
|
|
})
|
|
.with_children(|parent| {
|
|
spawn_buttons(parent, target_ids.pop().unwrap());
|
|
|
|
parent
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Px(200.),
|
|
height: Val::Px(200.),
|
|
align_items: AlignItems::FlexStart,
|
|
justify_content: JustifyContent::SpaceBetween,
|
|
flex_direction: FlexDirection::Column,
|
|
padding: UiRect {
|
|
left: Val::Px(5.),
|
|
top: Val::Px(5.),
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
},
|
|
background_color: BackgroundColor(palette[3]),
|
|
..Default::default()
|
|
})
|
|
.with_children(|parent| {
|
|
spawn_buttons(parent, target_ids.pop().unwrap());
|
|
|
|
parent.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Px(100.),
|
|
height: Val::Px(100.),
|
|
..Default::default()
|
|
},
|
|
..Default::default()
|
|
});
|
|
});
|
|
});
|
|
});
|
|
});
|
|
});
|
|
}
|
|
|
|
fn spawn_button<T>(parent: &mut ChildBuilder, text_style: TextStyle, target: Entity)
|
|
where
|
|
T: Default + std::fmt::Debug + Send + Sync + 'static,
|
|
Target<T>: TargetUpdate,
|
|
{
|
|
parent
|
|
.spawn((
|
|
ButtonBundle {
|
|
style: Style {
|
|
align_self: AlignSelf::FlexStart,
|
|
padding: UiRect::axes(Val::Px(5.), Val::Px(1.)),
|
|
..Default::default()
|
|
},
|
|
image: UiImage::default().with_color(Color::BLACK.with_alpha(0.5)),
|
|
..Default::default()
|
|
},
|
|
Target::<T>::new(target),
|
|
))
|
|
.with_children(|builder| {
|
|
builder.spawn(
|
|
TextBundle::from_section(
|
|
format!("{}::{:?}", Target::<T>::NAME, T::default()),
|
|
text_style,
|
|
)
|
|
.with_text_justify(JustifyText::Center),
|
|
);
|
|
});
|
|
}
|
|
|
|
fn buttons_handler<T>(
|
|
mut left_panel_query: Query<&mut <Target<T> as TargetUpdate>::TargetComponent>,
|
|
mut visibility_button_query: Query<(&Target<T>, &Interaction, &Children), Changed<Interaction>>,
|
|
mut text_query: Query<&mut Text>,
|
|
) where
|
|
T: Send + Sync,
|
|
Target<T>: TargetUpdate + Component,
|
|
{
|
|
for (target, interaction, children) in visibility_button_query.iter_mut() {
|
|
if matches!(interaction, Interaction::Pressed) {
|
|
let mut target_value = left_panel_query.get_mut(target.id).unwrap();
|
|
for &child in children {
|
|
if let Ok(mut text) = text_query.get_mut(child) {
|
|
text.sections[0].value = target.update_target(target_value.as_mut());
|
|
text.sections[0].style.color = if text.sections[0].value.contains("None")
|
|
|| text.sections[0].value.contains("Hidden")
|
|
{
|
|
Color::srgb(1.0, 0.7, 0.7)
|
|
} else {
|
|
Color::WHITE
|
|
};
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fn text_hover(
|
|
mut button_query: Query<(&Interaction, &mut UiImage, &Children), Changed<Interaction>>,
|
|
mut text_query: Query<&mut Text>,
|
|
) {
|
|
for (interaction, mut image, children) in button_query.iter_mut() {
|
|
match interaction {
|
|
Interaction::Hovered => {
|
|
image.color = Color::BLACK.with_alpha(0.6);
|
|
for &child in children {
|
|
if let Ok(mut text) = text_query.get_mut(child) {
|
|
// Bypass change detection to avoid recomputation of the text when only changing the color
|
|
text.bypass_change_detection().sections[0].style.color = YELLOW.into();
|
|
}
|
|
}
|
|
}
|
|
_ => {
|
|
image.color = Color::BLACK.with_alpha(0.5);
|
|
for &child in children {
|
|
if let Ok(mut text) = text_query.get_mut(child) {
|
|
text.bypass_change_detection().sections[0].style.color =
|
|
if text.sections[0].value.contains("None")
|
|
|| text.sections[0].value.contains("Hidden")
|
|
{
|
|
HIDDEN_COLOR
|
|
} else {
|
|
Color::WHITE
|
|
};
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|