handleVerticalDragEnd method
Implementation
void handleVerticalDragEnd(DragEndDetails details) {
  if (!enablePanning) {
    return;
  }
  _previousMovedPosition = null;
  _updateZoomEndDetails();
}void handleVerticalDragEnd(DragEndDetails details) {
  if (!enablePanning) {
    return;
  }
  _previousMovedPosition = null;
  _updateZoomEndDetails();
}