RenderPointerListener constructor
Creates a render object that forwards point events to callbacks.
The behavior
argument defaults to HitTestBehavior.deferToChild.
Implementation
RenderPointerListener({
this.onPointerDown,
this.onPointerMove,
this.onPointerUp,
this.onPointerCancel,
HitTestBehavior behavior = HitTestBehavior.deferToChild,
RenderBox child
}) : super(behavior: behavior, child: child);