onPointerDataPacket property Null safety

PointerDataPacketCallback? onPointerDataPacket

A callback that is invoked when pointer data is available.

The framework invokes this callback in the same zone in which the callback was set.

See also:

  • GestureBinding, the Flutter framework class which manages pointer events.

Implementation

PointerDataPacketCallback? get onPointerDataPacket => _onPointerDataPacket;
void onPointerDataPacket= (PointerDataPacketCallback? callback)

Implementation

set onPointerDataPacket(PointerDataPacketCallback? callback) {
  _onPointerDataPacket = callback;
  _onPointerDataPacketZone = Zone.current;
}