code: def mimeData( self, items ):
          
          text = []
          for item in items:
              text.append(nativestring(item.text()))
          
          data = QMimeData()
          data.setText(','.join(text))
          return data
docs: Creates the mime data for the different items.
          
          :param      items | [<QListWidgetItem>, ..]
          
          :return     <QMimeData>