pub trait ButtonExt {
fn set_enabled(&mut self, cx: &mut Cx, enabled: bool);
}

impl ButtonExt for Button {
fn set_enabled(&mut self, cx: &mut Cx, enabled: bool) {
if enabled {
self.animator_play(cx, id!(hover.off));
} else {
self.animator_play(cx, id!(disabled.on));
}
}
}

live_design! {
<View> {
// 主内容
<Button> { text: "显示模态框" }

// 模态覆盖层（初始隐藏）
modal_overlay = <View> {
visible: false
abs_pos: vec2(0, 0)
width: Fill, height: Fill

draw_bg: { color: #00000080 }

<View> {
// 模态内容
width: 400, height: 300
<Label> { text: "模态内容" }
}
}
}
}

pub enum LoadState<T> {
Loading,
Loaded(T),
Error(String),
}

impl Widget for MyWidget {
fn handle_event(&mut self, cx: &mut Cx, event: &Event, scope: &mut Scope) {
match &self.load_state {
LoadState::Loading => {
// 显示加载动画
}
LoadState::Loaded(data) => {
// 渲染数据
}
LoadState::Error(msg) => {
// 显示错误
}
}
}
}

#[derive(Clone, Debug, PartialEq)]
pub enum ViewState {
List,
Detail(String),
Edit(String),
Loading,
}

impl MyView {
fn transition_to(&mut self, cx: &mut Cx, new_state: ViewState) {
self.state = new_state;
self.redraw(cx);
}
}

// 在 main.rs 中
fn main() {
let runtime = tokio::runtime::Runtime::new().unwrap();
let _guard = runtime.enter();

makepad_widgets::live_design(live_design);
makepad_widgets::makepad_platform::event_loop::event_loop(|cx, event| {
// 事件处理
});
}

// 在组件中
fn fetch_data(&mut self, cx: &mut Cx) {
let sender = cx.get_sender();
tokio::spawn(async move {
let data = fetch_from_api().await;
sender.send(DataLoadedEvent(data));
});
}

live_design! {
THEME_LIGHT = {
bg_color: #FFFFFF
text_color: #000000
}

THEME_DARK = {
bg_color: #1E1E1E
text_color: #FFFFFF
}

<View> {
theme: $(THEME_LIGHT)
draw_bg: { color: (theme.bg_color) }
}
}