def mouseDoubleClickEvent(self, event):
        """Reimplement Qt method"""
        index_clicked = self.indexAt(event.pos())
        if index_clicked.isValid():
            row = index_clicked.row()
            # TODO: Remove hard coded "Value" column number (3 here)
            index_clicked = index_clicked.child(row, 3)
            self.edit(index_clicked)
        else:
            event.accept()
Reimplement Qt method