protected void OnMouseDown(MouseDownEvent e)
{
if (base.CanStartManipulation(e))
{
this.m_Start = (this.m_Last = e.localMousePosition);
this.m_ZoomCenter = VisualElementExtensions.ChangeCoordinatesTo(base.target, this.m_GraphUI, this.m_Start);
this.m_Active = true;
MouseCaptureController.TakeMouseCapture(base.target);
e.StopPropagation();
}
Debug.Log(e);
}