onDragDown method

void onDragDown(
  1. DragDownDetails details
)

Implementation

void onDragDown(DragDownDetails details) {
  _gestureAnimation.stop();
  _hold?.cancel();
  _hold = null;
  _drag?.cancel();
  _drag = null;
  assert(_drag == null);
  assert(_hold == null);
  _hold = position.hold(_disposeHold);
}