Struct EventCx 

pub struct EventCx<'a> { /* private fields */ }

事件上下文——组件通过它标记 dirty、退出应用等

每个 Node 拥有独立的 EventCx，dirty 标记精确到当前节点， 同时通过 global_dirty 确保 Runtime 感知到变更。

Implementations

impl<'a> EventCx<'a>

pub fn phase(&self) -> EventPhase

当前事件传播阶段

pub fn stop_propagation(&mut self)

停止事件传播（后续阶段和祖先不再收到该事件）

pub fn invalidate_paint(&mut self)

标记当前节点需要重绘

pub fn invalidate_layout(&mut self)

标记当前节点需要重新布局并重绘

pub fn invalidate(&mut self)

标记需要重新布局（等同于 invalidate_layout）

pub fn invalidate_tree(&mut self)

标记组件树结构变化，触发完整 rebuild + relayout + repaint

pub fn copy_to_clipboard(&self, text: &str)

Copy text to the system clipboard via OSC 52.

Most modern terminals support this. The escape sequence is written directly to stdout.

pub fn quit(&mut self)

退出应用

pub fn dispatch(&mut self, cmd: Command)

发送命令给 Runtime 统一处理（通过全局队列）

pub fn toggle_debug()

切换 debug 视图

pub fn spawn<F>(&mut self, task: F)

where F: FnOnce() -> String + Send + 'static,

启动后台任务

pub fn spawn_worker<F>(&mut self, task: F) -> WorkerId

where F: FnOnce() -> String + Send + 'static,

启动可追踪的后台任务。返回 WorkerId 用于取消。

pub fn cancel_worker(&mut self, id: WorkerId)

取消指定 Worker。

pub fn set_timer(&mut self, duration_ms: u64) -> u64

Registers a one-shot timer. After duration_ms milliseconds, an Event::Timer(id) is dispatched to this component and the timer is automatically removed. Returns the timer id.

pub fn set_interval(&mut self, interval_ms: u64) -> u64

Registers a periodic timer. Every interval_ms milliseconds, an Event::Timer(id) is dispatched to this component. The timer continues until cancel_timer(id) is called or the component is unmounted. Returns the timer id.

pub fn cancel_timer(&mut self, timer_id: u64)

Cancels a previously registered timer. No further Event::Timer events will be dispatched for this id.