删除动态创建的Q菜单项



我有一个Qmenu,我通过加载一个带有Qsettings的列表来创建它,我试图通过在QListQWidget中加载列表并删除所选项目来从菜单中删除项目。目前,我可以删除列表小部件中的菜单项,它也会将它们从qsettings中删除,但我不知道如何在不重新启动的情况下从菜单中删除这些项。我试过各种各样的方法,比如removeAction等,但都没能弄清楚
这是我的代码:

import functools
import sys
from PyQt5 import QtCore
from PyQt5.QtWidgets import QWidget, QPushButton, QHBoxLayout, 
QApplication, QAction, QMenu, QListWidgetItem, 
QListWidget, QGridLayout
class MainWindow(QWidget):
settings = QtCore.QSettings('test_org', 'my_app')
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.layout = QHBoxLayout()
self.menu_btn = QPushButton()
self.menu = QMenu()
self.add_menu = self.menu.addMenu("Menu")
self.menu_btn.setMenu(self.menu)
self.open_list_btn = QPushButton('open list')
self.load_items = self.settings.value('menu_items', [])
for item in self.load_items:
self.action = QAction(item[0], self)
self.action.setData(item)
self.add_menu.addAction(self.action)
self.action.triggered.connect(functools.partial(self.menu_clicked, self.action))
self.layout.addWidget(self.menu_btn)
self.layout.addWidget(self.open_list_btn)
self.setLayout(self.layout)
self.open_list_btn.clicked.connect(self.open_window)
def open_window(self):
self.create_menu_item = List()
self.create_menu_item.show()
def menu_clicked(self, item):
itmData = item.data()
print(itmData)
class List(QWidget):
settings = QtCore.QSettings('test_org', 'my_app')
def __init__(self, parent=None):
super(List, self).__init__(parent)
self.menu_items = self.settings.value('menu_items', [])
self.layout = QGridLayout()
self.list = QListWidget()
self.remove_btn = QPushButton('Remove')
self.layout.addWidget(self.list, 1, 1, 1, 1)
self.layout.addWidget(self.remove_btn, 2, 1, 1, 1)
self.setLayout(self.layout)
self.remove_btn.clicked.connect(self.remove_items)
for item in self.menu_items:
self.item = QListWidgetItem()
self.item.setText(str(item[0]))
self.list.addItem(self.item)
def remove_items(self):
self.menu_items = self.settings.value('menu_items', [])
del self.menu_items[self.list.currentRow()]
self.settings.setValue('menu_items', self.menu_items)
listItems = self.list.selectedItems()
if not listItems: return
for item in listItems:
self.list.takeItem(self.list.row(item))
if __name__ == '__main__':
app = QApplication(sys.argv)
w = MainWindow()
w.show()
app.exec_()

有人有什么想法吗?

编辑:

这是QSettings中列表的结构。我用这个加载菜单,用这个加载QlistWidget。当我为QListWidget删除项目时,我正试图让菜单也删除这些项目。

mylist = ['item_name',['itemdata1', 'itemdata2', 'itemdata3'], 
'item_name2',['itemdata1', 'itemdata2', 'itemdata3'], 
'item_name3',['itemdata1', 'itemdata2', 'itemdata3']]

我认为您使用的数据结构是不正确的,因为当我执行代码时,它会生成两倍多的QAction,我建议的结构是一个字典,其中的键是QAction的名称和数据列表的值:

{
'item0': ['itemdata00', 'itemdata01', 'itemdata02'],
'item1': ['itemdata10', 'itemdata11', 'itemdata12'],
...
}

要构建初始配置,请使用以下脚本:

创建设置.py

from PyQt5 import QtCore
if __name__ == '__main__':
settings = QtCore.QSettings('test_org', 'my_app')
d = {}
for i in range(5):
key = "item{}".format(i)
value = ["itemdata{}{}".format(i, j) for j in range(3)]
d[key] = value
settings.setValue('menu_items', d)
print(d)
settings.sync()

另一方面,我认为您想要处理QAction的销毁的小部件应该接管相应的QMenu,如下所示:

import sys
from PyQt5 import QtCore, QtWidgets
class MainWindow(QtWidgets.QWidget):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
layout = QtWidgets.QHBoxLayout(self)
menu_btn = QtWidgets.QPushButton()
open_list_btn = QtWidgets.QPushButton('open list')
layout.addWidget(menu_btn)
layout.addWidget(open_list_btn)
menu = QtWidgets.QMenu()
menu_btn.setMenu(menu)
self.menu_manager = MenuManager("menu_items", "Menu")
menu.addMenu(self.menu_manager.menu)
self.menu_manager.menu.triggered.connect(self.menu_clicked)
open_list_btn.clicked.connect(self.menu_manager.show)
def menu_clicked(self, action):
itmData = action.data()
print(itmData)

class MenuManager(QtWidgets.QWidget):
def __init__(self, key, menuname, parent=None):
super(MenuManager, self).__init__(parent)
self.settings = QtCore.QSettings('test_org', 'my_app')
self.key = key
self.layout = QtWidgets.QVBoxLayout(self)
self.listWidget = QtWidgets.QListWidget()
self.remove_btn = QtWidgets.QPushButton('Remove')
self.layout.addWidget(self.listWidget)
self.layout.addWidget(self.remove_btn)
self.remove_btn.clicked.connect(self.remove_items)
self.menu = QtWidgets.QMenu(menuname)
load_items = self.settings.value(self.key, [])
for name, itemdata in load_items.items():
action = QtWidgets.QAction(name, self.menu)
action.setData(itemdata)
self.menu.addAction(action)
item = QtWidgets.QListWidgetItem(name)
item.setData(QtCore.Qt.UserRole, action)
self.listWidget.addItem(item)
def remove_items(self):
for item in self.listWidget.selectedItems():
it = self.listWidget.takeItem(self.listWidget.row(item))
action = it.data(QtCore.Qt.UserRole)
self.menu.removeAction(action)
self.sync_data()
def sync_data(self):
save_items = {}
for i in range(self.listWidget.count()):
it = self.listWidget.item(i)
action = it.data(QtCore.Qt.UserRole)
save_items[it.text()] = action.data()
self.settings.setValue(self.key, save_items)
self.settings.sync()
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.show()
sys.exit(app.exec_())

我弄明白了。我不确定有什么更好的方法,但我用对象名做到了
在主窗口中,我使用for循环中列表列表中每个列表的第一项将objectNames设置为self.action,如下所示:

self.action.setObjectName(item[0])

然后我在MainWindow类中创建了这个函数:

def remove_menu_item(self, value):
self.add_menu.removeAction(self.findChild(QAction, value))

然后我添加了这个:

w.remove_menu_item(item.text())

到List类中的remove函数,以获得列表列表中相同的第一项,即现在的QActions的objectName。

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