mirror of
https://github.com/bevyengine/bevy
synced 2024-11-30 00:20:20 +00:00
08bf1a6c2e
# Objective - Simplify API and make authoring styles easier See: https://github.com/bevyengine/bevy/issues/8540#issuecomment-1536177102 ## Solution - The `size`, `min_size`, `max_size`, and `gap` properties have been replaced by `width`, `height`, `min_width`, `min_height`, `max_width`, `max_height`, `row_gap`, and `column_gap` properties --- ## Changelog - Flattened `Style` properties that have a `Size` value directly into `Style` ## Migration Guide - The `size`, `min_size`, `max_size`, and `gap` properties have been replaced by the `width`, `height`, `min_width`, `min_height`, `max_width`, `max_height`, `row_gap`, and `column_gap` properties. Use the new properties instead. --------- Co-authored-by: ickshonpe <david.curthoys@googlemail.com>
125 lines
5.2 KiB
Rust
125 lines
5.2 KiB
Rust
//! Demonstrates how to use the z-index component on UI nodes to control their relative depth
|
|
//!
|
|
//! It uses colored boxes with different z-index values to demonstrate how it can affect the order of
|
|
//! depth of nodes compared to their siblings, but also compared to the entire UI.
|
|
|
|
use bevy::prelude::*;
|
|
|
|
fn main() {
|
|
App::new()
|
|
.insert_resource(ClearColor(Color::BLACK))
|
|
.add_plugins(DefaultPlugins)
|
|
.add_systems(Startup, setup)
|
|
.run();
|
|
}
|
|
|
|
fn setup(mut commands: Commands) {
|
|
commands.spawn(Camera2dBundle::default());
|
|
|
|
// spawn the container with default z-index.
|
|
// the default z-index value is `ZIndex::Local(0)`.
|
|
// because this is a root UI node, using local or global values will do the same thing.
|
|
commands
|
|
.spawn(NodeBundle {
|
|
style: Style {
|
|
width: Val::Percent(100.),
|
|
align_items: AlignItems::Center,
|
|
justify_content: JustifyContent::Center,
|
|
..default()
|
|
},
|
|
..default()
|
|
})
|
|
.with_children(|parent| {
|
|
parent
|
|
.spawn(NodeBundle {
|
|
background_color: Color::GRAY.into(),
|
|
style: Style {
|
|
width: Val::Px(180.0),
|
|
height: Val::Px(100.0),
|
|
..default()
|
|
},
|
|
..default()
|
|
})
|
|
.with_children(|parent| {
|
|
// spawn a node with default z-index.
|
|
parent.spawn(NodeBundle {
|
|
background_color: Color::RED.into(),
|
|
style: Style {
|
|
position_type: PositionType::Absolute,
|
|
left: Val::Px(10.0),
|
|
bottom: Val::Px(40.0),
|
|
width: Val::Px(100.0),
|
|
height: Val::Px(50.0),
|
|
..default()
|
|
},
|
|
..default()
|
|
});
|
|
|
|
// spawn a node with a positive local z-index of 2.
|
|
// it will show above other nodes in the gray container.
|
|
parent.spawn(NodeBundle {
|
|
z_index: ZIndex::Local(2),
|
|
background_color: Color::BLUE.into(),
|
|
style: Style {
|
|
position_type: PositionType::Absolute,
|
|
left: Val::Px(45.0),
|
|
bottom: Val::Px(30.0),
|
|
width: Val::Px(100.),
|
|
height: Val::Px(50.),
|
|
..default()
|
|
},
|
|
..default()
|
|
});
|
|
|
|
// spawn a node with a negative local z-index.
|
|
// it will show under other nodes in the gray container.
|
|
parent.spawn(NodeBundle {
|
|
z_index: ZIndex::Local(-1),
|
|
background_color: Color::GREEN.into(),
|
|
style: Style {
|
|
position_type: PositionType::Absolute,
|
|
left: Val::Px(70.0),
|
|
bottom: Val::Px(20.0),
|
|
width: Val::Px(100.),
|
|
height: Val::Px(75.),
|
|
..default()
|
|
},
|
|
..default()
|
|
});
|
|
|
|
// spawn a node with a positive global z-index of 1.
|
|
// it will show above all other nodes, because it's the highest global z-index in this example.
|
|
// by default, boxes all share the global z-index of 0 that the gray container is added to.
|
|
parent.spawn(NodeBundle {
|
|
z_index: ZIndex::Global(1),
|
|
background_color: Color::PURPLE.into(),
|
|
style: Style {
|
|
position_type: PositionType::Absolute,
|
|
left: Val::Px(15.0),
|
|
bottom: Val::Px(10.0),
|
|
width: Val::Px(100.),
|
|
height: Val::Px(60.),
|
|
..default()
|
|
},
|
|
..default()
|
|
});
|
|
|
|
// spawn a node with a negative global z-index of -1.
|
|
// this will show under all other nodes including its parent, because it's the lowest global z-index
|
|
// in this example.
|
|
parent.spawn(NodeBundle {
|
|
z_index: ZIndex::Global(-1),
|
|
background_color: Color::YELLOW.into(),
|
|
style: Style {
|
|
position_type: PositionType::Absolute,
|
|
left: Val::Px(-15.0),
|
|
bottom: Val::Px(-15.0),
|
|
width: Val::Px(100.),
|
|
height: Val::Px(125.),
|
|
..default()
|
|
},
|
|
..default()
|
|
});
|
|
});
|
|
});
|
|
}
|