onTouchOver property Null safety

EventStream<TouchEvent> onTouchOver

Dispatched when the user moves the point of contact over an InteractiveObject instance on a touch-enabled device.

You have to opt-in for touch events by setting the InputEventMode to TouchOnly or MouseAndTouch in the stage options.

Implementation

EventStream<TouchEvent> get onTouchOver =>
    InteractiveObject.touchOverEvent.forTarget(this);