def paintEvent(self, event):
        """Adds cursor line for view if drag active. Passes event to superclass
        see :qtdoc:`qtdocs<qabstractscrollarea.paintEvent>`"""
        super(AutoParameterTableView, self).paintEvent(event)

        if self.dragline is not None:
            pen = QtGui.QPen(QtCore.Qt.blue)
            painter = QtGui.QPainter(self.viewport())
            painter.setPen(pen)
            painter.drawLine(self.dragline)