--- a/eric6/Graphics/ClassItem.py Mon Mar 01 17:48:43 2021 +0100 +++ b/eric6/Graphics/ClassItem.py Tue Mar 02 17:17:09 2021 +0100 @@ -198,8 +198,8 @@ """ pen = self.pen() if ( - (option.state & QStyle.State_Selected) == - QStyle.State(QStyle.State_Selected) + (option.state & QStyle.StateFlag.State_Selected) == + QStyle.State(QStyle.StateFlag.State_Selected) ): pen.setWidth(2) else: