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use bevy::{
diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin},
prelude::*,
};
use bevy_ninepatch::*;
fn main() -> Result<(), Box<dyn std::error::Error>> {
App::default()
.add_plugins(DefaultPlugins)
// Add the `NinePatchPlugin` plugin
.add_plugin(NinePatchPlugin::<Content>::default())
.add_plugin(FrameTimeDiagnosticsPlugin::default())
// Adds a system that prints diagnostics to the console
.add_plugin(LogDiagnosticsPlugin::default())
.add_startup_system(setup)
.add_system(set_content)
.add_system(update_size)
.run();
Ok(())
}
fn setup(
mut commands: Commands,
asset_server: Res<AssetServer>,
mut nine_patches: ResMut<Assets<NinePatchBuilder<Content>>>,
) {
// load the assets
let cornered_panel_texture_handle = asset_server.load("metalPanel_yellowCorner.png");
let panel_nine_patch_handle = nine_patches.add(NinePatchBuilder::from_patches(vec![
vec![
// top left corner patch
Patch {
original_size: IVec2::new(30, 35),
target_size: Size::new(Val::Undefined, Val::Undefined),
content: None,
},
// top middle-left patch. This patch width can grow, and will contain the content for
// `PanelContent::Title`
Patch {
original_size: IVec2::new(15, 35),
target_size: Size::new(Val::Percent(30.), Val::Undefined),
content: Some(Content::Title),
},
// top middle patch. In the original PNG, it's the yellow titled part
Patch {
original_size: IVec2::new(25, 35),
target_size: Size::new(Val::Undefined, Val::Undefined),
content: None,
},
// top middle-right patch. This patch width can grow
Patch {
original_size: IVec2::new(20, 35),
target_size: Size::new(Val::Percent(70.), Val::Undefined),
content: None,
},
// top right corner
Patch {
original_size: IVec2::new(10, 35),
target_size: Size::new(Val::Undefined, Val::Undefined),
content: None,
},
],
vec![
// left border. This patch height can grow
Patch {
original_size: IVec2::new(10, -45),
target_size: Size::new(Val::Undefined, Val::Percent(100.)),
content: None,
},
// center. This patch can grow both in height and width, and will contain `PanelContent::Body`
Patch {
original_size: IVec2::new(-20, -45),
target_size: Size::new(Val::Percent(100.), Val::Percent(100.)),
content: Some(Content::Content),
},
// right border. This patch height can grow
Patch {
original_size: IVec2::new(10, -45),
target_size: Size::new(Val::Undefined, Val::Percent(100.)),
content: None,
},
],
vec![
// bottom left corner
Patch {
original_size: IVec2::new(10, 10),
target_size: Size::new(Val::Undefined, Val::Undefined),
content: None,
},
// bottom middle. This patch width can grow
Patch {
original_size: IVec2::new(-20, 10),
target_size: Size::new(Val::Percent(100.), Val::Undefined),
content: None,
},
// bottom right corner
Patch {
original_size: IVec2::new(10, 10),
target_size: Size::new(Val::Undefined, Val::Undefined),
content: None,
},
],
]));
commands.spawn((
// this component bundle will be detected by the plugin, and the 9-Patch UI element will be added as a child
// of this entity
NinePatchBundle {
style: Style {
margin: UiRect::all(Val::Auto),
justify_content: JustifyContent::Center,
align_items: AlignItems::Center,
size: Size::new(Val::Px(900.), Val::Px(600.)),
..Default::default()
},
nine_patch_data: NinePatchData {
nine_patch: panel_nine_patch_handle,
texture: cornered_panel_texture_handle,
..Default::default()
},
..Default::default()
},
UiElement::Panel,
));
commands.spawn(Camera2dBundle::default());
}
fn set_content(
mut commands: Commands,
asset_server: Res<AssetServer>,
mut nine_patches: ResMut<Assets<NinePatchBuilder<Content>>>,
mut patch_content: Query<(Entity, &mut NinePatchContent<Content>)>,
ui_element_query: Query<&UiElement>,
mut font: Local<Handle<Font>>,
) {
*font = asset_server.load("Kenney Future Narrow.ttf");
for (entity, mut nine_patch_content) in &mut patch_content.iter_mut() {
if !nine_patch_content.loaded {
match (
*ui_element_query
.get_component::<UiElement>(nine_patch_content.parent)
.unwrap(),
&nine_patch_content.content,
) {
(UiElement::Panel, Content::Content) => {
let panel_texture_handle: Handle<Image> =
asset_server.load("glassPanel_corners.png");
// load the 9-Patch as an assets and keep an `Handle<NinePatchBuilder<()>>`
let nine_patch_handle = nine_patches.add(
NinePatchBuilder::by_margins_with_content(20, 20, 20, 20, Content::Content),
);
let content_entity = commands
.spawn((
// this component bundle will be detected by the plugin, and the 9-Patch UI element will be added as a child
// of this entity
NinePatchBundle {
style: Style {
margin: UiRect::all(Val::Auto),
justify_content: JustifyContent::Center,
align_items: AlignItems::Center,
size: Size::new(Val::Px(850.), Val::Px(550.)),
..Default::default()
},
nine_patch_data: NinePatchData {
nine_patch: nine_patch_handle,
texture: panel_texture_handle,
..Default::default()
},
..Default::default()
},
UiElement::InnerPanel,
))
.id();
commands.entity(entity).push_children(&[content_entity]);
nine_patch_content.loaded = true;
}
(UiElement::Panel, Content::Title) => {
let content_entity = commands
.spawn(
TextBundle::from_section(
"Example Title",
TextStyle {
font: font.clone(),
font_size: 25.0,
color: Color::BLUE,
},
)
.with_style(Style {
margin: UiRect {
left: Val::Undefined,
right: Val::Auto,
top: Val::Px(8.),
bottom: Val::Auto,
},
..Default::default()
}),
)
.id();
commands.entity(entity).push_children(&[content_entity]);
nine_patch_content.loaded = true;
}
(UiElement::InnerPanel, _) => {
// prepare the button
let button_texture_handle = asset_server.load("blue_button02.png");
let button_nine_patch_handle = nine_patches.add(
NinePatchBuilder::by_margins_with_content(5, 10, 6, 6, Content::Content),
);
let button_cancel_entity = commands
.spawn((
// this component bundle will be detected by the plugin, and the 9-Patch UI element will be added as a child
// of this entity
NinePatchBundle {
style: Style {
margin: UiRect {
left: Val::Px(0.),
right: Val::Auto,
top: Val::Auto,
bottom: Val::Px(0.),
},
size: Size::new(Val::Px(300.), Val::Px(80.)),
justify_content: JustifyContent::Center,
align_items: AlignItems::Center,
..Default::default()
},
nine_patch_data: NinePatchData {
nine_patch: button_nine_patch_handle.clone(),
texture: button_texture_handle.clone(),
..Default::default()
},
..Default::default()
},
UiElement::ButtonCancel,
))
.id();
let button_ok_entity = commands
.spawn((
// this component bundle will be detected by the plugin, and the 9-Patch UI element will be added as a child
// of this entity
NinePatchBundle {
style: Style {
margin: UiRect {
left: Val::Auto,
right: Val::Px(0.),
top: Val::Auto,
bottom: Val::Px(0.),
},
justify_content: JustifyContent::Center,
align_items: AlignItems::Center,
size: Size::new(Val::Px(300.), Val::Px(80.)),
..Default::default()
},
nine_patch_data: NinePatchData {
nine_patch: button_nine_patch_handle,
texture: button_texture_handle,
..Default::default()
},
..Default::default()
},
UiElement::ButtonOK,
))
.id();
commands
.entity(entity)
.push_children(&[button_cancel_entity, button_ok_entity]);
nine_patch_content.loaded = true;
}
(UiElement::ButtonOK, _) => {
let content_entity = commands
.spawn(
TextBundle::from_section(
"OK",
TextStyle {
font: font.clone(),
font_size: 50.0,
color: Color::GREEN,
},
)
.with_style(Style {
margin: UiRect {
left: Val::Px(110.),
right: Val::Auto,
top: Val::Px(10.),
bottom: Val::Auto,
},
..Default::default()
}),
)
.id();
commands.entity(entity).push_children(&[content_entity]);
nine_patch_content.loaded = true;
}
(UiElement::ButtonCancel, _) => {
let content_entity = commands
.spawn(
TextBundle::from_section(
"CANCEL",
TextStyle {
font: font.clone(),
font_size: 50.0,
color: Color::RED,
},
)
.with_style(Style {
margin: UiRect {
left: Val::Px(50.),
right: Val::Auto,
top: Val::Px(10.),
bottom: Val::Auto,
},
..Default::default()
}),
)
.id();
commands.entity(entity).push_children(&[content_entity]);
nine_patch_content.loaded = true;
}
}
}
}
}
#[derive(Clone, PartialEq, Eq, std::hash::Hash)]
enum Content {
Title,
Content,
}
#[derive(Clone, Copy, Component)]
enum UiElement {
Panel,
InnerPanel,
ButtonOK,
ButtonCancel,
}
// by changing the component `Style.size`, the 9-Patch UI element will be resized
fn update_size(time: Res<Time>, mut query: Query<(&mut Style, &UiElement)>) {
for (mut style, panel) in query.iter_mut() {
let (x, y) = time.elapsed_seconds().sin_cos();
match panel {
UiElement::Panel => {
style.size.width = Val::Px((900. + 50. * x as f32).ceil());
style.size.height = Val::Px((600. + 50. * y as f32).ceil());
}
UiElement::InnerPanel => {
style.size.width = Val::Px((850. + 50. * x as f32).ceil());
style.size.height = Val::Px((550. + 50. * y as f32).ceil());
}
UiElement::ButtonOK => style.size.width = Val::Px((300. + 50. * x as f32).ceil()),
UiElement::ButtonCancel => style.size.height = Val::Px((90. + 10. * y as f32).ceil()),
}
}
}