Interface WidgetActivateEvent

The click that caused a "pointer" activation; null for a keyboard or programmatic one.

There is deliberately no matching keyEvent: a key activation's cause is already fully described by "Enter or Space on the focused control" (see Button), and a listener that needs the keystroke itself can read it from its own keydown listener, which fires on the same node first.

Whether a pointer, a key, or an explicit activate() call caused this.

The activated widget — always the emitter.