Enum ViewEvent 

pub enum ViewEvent {
    Input(InputEvent),
    Lifecycle(LifecycleEvent),
    Paint,
    ScrollSync(ScrollOffsets),
    Shutdown,
}

Top-level event sent from the main thread to a view thread.

Sent over mpsc::Sender<ViewEvent> — the single channel per view. The view thread’s event loop matches on the category, then delegates to specialized handlers.

Chrome equivalent: the dispatch in WebFrameWidgetImpl::HandleInputEvent() for input, and separate IPC messages for lifecycle.

Variants

Input(InputEvent)

An input event (mouse, keyboard, wheel). Routed to the view’s EventHandler for hit testing and DOM dispatch.

Lifecycle(LifecycleEvent)

A lifecycle event (resize, focus change, scale factor change). Handled by the view’s layout/rendering pipeline.

Paint

Something changed — schedule a frame.

ScrollSync(ScrollOffsets)

Compositor posted updated scroll offsets after compositor-side scroll. Chrome: ProxyImpl::SetNeedsCommitOnImplThread() posts scroll state back. The view thread applies these before the next paint so positions match.

Shutdown

Clean shutdown — the view thread should exit its event loop.