metadata_edit.py 文件源码

def clear(self):
        try:
            model = self._item.model()
        except (AttributeError, RuntimeError):
            pass
        else:
            model.columnsInserted.disconnect(self._on_columns_inserted)
            self.new_field_requested.disconnect(model.insert_field)

        self._item = None
        self._fields = []
        self._new_field_edit = None
        self.setTitle('')

        if self.layout() is not None:
            while self.layout().count():
                item = self.layout().takeAt(0)
                if item:
                    item.widget().deleteLater()
            sip.delete(self.layout())

        layout = QtWidgets.QFormLayout()
        layout.setFieldGrowthPolicy(layout.FieldsStayAtSizeHint)
        self.setLayout(layout)