code: def set_maintext(self, index):
          
          dr = QtCore.Qt.DisplayRole
          text = ""
          model = index.model()
          for i in (1, 2, 3, 5, 6):
              new = model.index(index.row(), i, index.parent()).data(dr)
              if new is not None:
                  text = " | ".join((text, new)) if text else new
  
          self.maintext_lb.setText(text)
docs: Set the maintext_lb to display text information about the given reftrack
  
          :param index: the index
          :type index: :class:`QtGui.QModelIndex`
          :returns: None
          :rtype: None
          :raises: None