Question

我对QMenu的撕下存在问题，除非我关闭撕下并重新撕下，否则它不会使用我创建的新项目进行更新。

在我的以下示例中，如果您这样做：

添加“饮料”选项
将鼠标光标悬停在“饮料”标签上，然后单击鼠标右键
如果您点击“第一个？”选项撕下，然后在上述撕下窗口中，点击Add menu item
例如如果我的输入是soda，则无法看到新选项。但是，如果我再次单击鼠标右键，请单击“饮料”选项卡，该选项就在那里。

但是，如果我对_addActionItem中的菜单执行相同的操作，则可以立即在撕下框中看到我的新选项。

有什么想法吗？

class MyWin(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(MyWin, self).__init__()
        central_widget = QtGui.QWidget()
        self.setCentralWidget(central_widget)
        vlay = QtGui.QVBoxLayout(central_widget)
        hlay = QtGui.QHBoxLayout()
        vlay.addLayout(hlay)
        vlay.addStretch()

        self.add_button = QtGui.QToolButton()
        self.tab_bar = QtGui.QTabBar(self)
        self.add_button.setIcon(QtGui.QIcon('add.png'))
        self.add_button.setMenu(self.set_menu())
        self.add_button.setPopupMode(QtGui.QToolButton.InstantPopup)

        self.tab_bar.setTabButton(
            0,
            QtGui.QTabBar.ButtonPosition.RightSide,
            self.add_button
        )
        hlay.addWidget(self.add_button)
        hlay.addWidget(self.tab_bar)

        self.my_extra_menus = defaultdict(list)

    def set_menu(self):
        menu_options = ['food', 'drinks', 'snacks']
        qmenu = QtGui.QMenu(self.add_button)
        for opt in menu_options:
            qmenu.addAction(opt, partial(self.set_new_tab, opt))
        qmenu.addAction
        return qmenu

    def set_new_tab(self, opt):
        self.tab_bar.addTab(opt)

    def mousePressEvent(self, event):
        index = self.tab_bar.tabAt(event.pos())

        if event.button() == QtCore.Qt.RightButton:
            self._showContextMenu(event.pos(), index)

        else:
            super(MyWin, self).mousePressEvent(event)

    def _showContextMenu(self, position, index):
        self.qmenu = QtGui.QMenu(self)
        self.qmenu.setTearOffEnabled(True) # New item is not shown in tearoff mode
        self.qmenu.setTitle(self.tab_bar.tabText(index))

        add_item_action = QtGui.QAction('Add Menu Item', self)
        slot = functools.partial(self._addMenuItem, index)
        add_item_action.triggered.connect(slot)
        self.qmenu.addAction(add_item_action)
        self.qmenu.addSeparator()

        if self.my_extra_menus.get(index):
            for menuItem in self.my_extra_menus[index]:
                self.qmenu.addMenu(menuItem)

        self.qmenu.addSeparator()

        global_position = self.mapToGlobal(self.pos())
        self.qmenu.exec_(QtCore.QPoint(
            global_position.x() - self.pos().x() + position.x(),
            global_position.y() - self.pos().y() + position.y()
        ))

    def _addMenuItem(self, index):
        first_tier_menu = []
        for i in self.qmenu.actions():
            first_tier_menu.append(i.text())

        new_menu_name, ok = QtGui.QInputDialog.getText(
            self,
            "Name of Menu",
            "Name of new Menu Item:"
        )

        if ok:
            if new_menu_name in list(filter(None, first_tier_menu)):
                self.err_popup()
            else:
                menu = QtGui.QMenu(new_menu_name, self)
                menu.setTearOffEnabled(True) # New item is shown in tearoff mode, unless I close and re-tearoff
                add_item_action = QtGui.QAction('Add sub Item', menu)
                slot = functools.partial(self._addActionItem, menu)
                add_item_action.triggered.connect(slot)
                menu.addAction(add_item_action)
                menu.addSeparator()

                self.my_extra_menus[index].append(menu)

    def _addActionItem(self, menu):
        new_item_name, ok = QtGui.QInputDialog.getText(
            self,
            "Name of Menu Item",
            "Name of new Menu Item:"
        )

        second_tier_menu = []
        for i in menu.actions():
            second_tier_menu.append(i.text())

        if ok:
            if new_item_name in list(filter(None, second_tier_menu)):
                self.err_popup()
            else:
                action = QtGui.QAction(new_item_name, self)
                slot = functools.partial(self._callActionItem, new_item_name)
                action.setCheckable(True)
                action.toggled.connect(slot)
                menu.addAction(action)


    def _callActionItem(self, name, flag):
        print name
        print flag


    def err_popup(self):
        msg = QtGui.QMessageBox()
        msg.setIcon(QtGui.QMessageBox.Critical)
        msg.setText("Input name already exists. Please check.")
        msg.setWindowTitle('Unable to add item')
        msg.setStandardButtons(QtGui.QMessageBox.Ok)
        msg.exec_()




win = MyWin()
win.show()

新项目未显示在QMenu拆解中

0 个答案: