Callback for item menu.

def _startDPDrag(self):
        """Callback for item menu."""
        dp = self._dp_menu_on
        if dp and dp.archived:
            drag = QDrag(self)
            mimedata = QMimeData()
            mimedata.setUrls([QUrl.fromLocalFile(dp.fullpath)])
            drag.setMimeData(mimedata)
            drag.exec_(Qt.CopyAction | Qt.LinkAction)