code: def mousePressEvent(self, ev):
      lpos = ev.position() if hasattr(ev, "position") else ev.localPos()
      self.pressPos = lpos
      self.mouseMoved = False
      ev.accept()
  
imports: import warnings
  from ..Qt import QtCore, QtGui, QtWidgets
  from ..widgets.VerticalLabel import VerticalLabel
  from .DockDrop import DockDrop
label_desc: Use image node_id 6 for calling the DockLabel obj's underlying member method code with example usage: obj.mousePressEvent(ev) without return types