handlePrimaryPointer method

  1. @override
void handlePrimaryPointer (PointerEvent event)
override

Override to provide behavior for the primary pointer when the gesture is still possible.

Implementation 

@override
void handlePrimaryPointer(PointerEvent event) {
  if (event is PointerUpEvent) {
    _finalPosition = event.position;
    _checkUp();
  } else if (event is PointerCancelEvent) {
    _reset();
  }
}