console.py 文件源码

def contextMenuEvent(self, event):
        if self.menu:
            del self.menu
            self.menu = None
        self.menu = self.createStandardContextMenu()

        clear_action = QAction("Clear", self.menu)
        self.menu.addAction(clear_action)   # add clear action

        if not self.toPlainText():   # content is None
            clear_action.setDisabled(True)
        else:
            clear_action.setDisabled(False)
            clear_action.triggered.connect(self.clear_text)  # connect clear event
        self.menu.exec(QCursor().pos())