QtGui.QAction.toggle () Это вспомогательная функция для свойства checked ().Подключитесь к нему, чтобы изменить проверенное состояние на противоположное.
и
Если я выполню ваш код, возникла ошибка TypeError.(После добавления подменю и щелчка по элементам действия подменю)
TypeError: _callActionItem() takes 3 positional arguments but 4 were given
Похоже, вы подготовили богатые аргументы для _callActionItem ().
Но это ловушка.
Поскольку для переключения требуется аргумент для bool.
Итак, вы должны изменить аргументы для _callActionItem () на _callActionItem(self,checked,action)
и toggled послеtoggling.
И toggle вызывается QSubAction.
Вы меняете, например, mousePressEvent.
1.
def mousePressEvent(self,event):
action = self.activeAction()
if not isinstance(action,QSubAction) and action is not None:
action.trigger()
return
elif isinstance(action,QSubAction):
action.toggle()
return
return QtGui.QMenu.mousePressEvent(self,event)
и
2.
_callActionItem(self,checked,action)
и весь измененный код здесь.
import functools
import sys
from PyQt4 import QtGui, QtCore
class QSubAction(QtGui.QAction):
def __init__(self, text="", parent=None):
super(QSubAction, self).__init__(text, parent)
self.setCheckable(True)
self.setChecked(True)
class QAddAction(QtGui.QAction):
def __init__(self, icon=None, text="Add Item", parent=None):
if icon:
super(QAddAction, self).__init__(icon, text, parent)
else:
super(QAddAction, self).__init__(text, parent)
class QCustomMenu(QtGui.QMenu):
"""Customized QMenu."""
def __init__(self, title, parent=None):
super(QCustomMenu, self).__init__(title=str(title), parent=parent)
self.setup_menu()
def mousePressEvent(self,event):
action = self.activeAction()
if not isinstance(action,QSubAction) and action is not None:
action.trigger()
return
elif isinstance(action,QSubAction):
action.toggle()
return
return QtGui.QMenu.mousePressEvent(self,event)
def setup_menu(self):
self.setContextMenuPolicy(QtCore.Qt.DefaultContextMenu)
def contextMenuEvent(self, event):
no_right_click = [QAddAction]
if any([isinstance(self.actionAt(event.pos()), instance) for instance in no_right_click]):
return
pos = event.pos()
def addAction(self, action):
super(QCustomMenu, self).addAction(action)
class Example(QtGui.QMainWindow):
def __init__(self, parent=None):
super(Example, self).__init__(parent)
self.initUI()
def initUI(self):
self.setGeometry(300, 300, 300, 200)
self.setWindowTitle('Context menu')
self.qmenu = QCustomMenu(title='', parent=self)
add_item_action = QtGui.QAction('Add Main item', self,
triggered=self.add_new_item)
self.qmenu.addAction(add_item_action)
def contextMenuEvent(self, event):
action = self.qmenu.exec_(self.mapToGlobal(event.pos()))
def add_new_item(self):
main_menu_name, ok = QtGui.QInputDialog.getText(
self,
'Main Menu',
'Name of new Menu Item:'
)
if ok:
self._addMenuItemTest(main_menu_name)
def _addMenuItemTest(self, main_menu_name):
icon_path = '/user_data/add.png'
base_qmenu = QCustomMenu(title=main_menu_name, parent=self)
base_qmenu.setTearOffEnabled(True)
add_item_action = QAddAction(None, 'Add Sub Item', base_qmenu)
slot = functools.partial(self.add_sub_item, base_qmenu)
add_item_action.triggered.connect(slot)
base_qmenu.addAction(add_item_action)
# self.qmenu.addMenu(base_qmenu)
test_action = QtGui.QAction(main_menu_name, self)
test_action.setMenu(base_qmenu)
test_action.setCheckable(True)
test_action.setChecked(True)
self.connect(test_action,QtCore.SIGNAL("triggered(bool)"),self.unsetCheck_action)
self.qmenu.addAction(test_action)
def unsetCheck_action(self,checked):
sender_obj = self.sender()
if isinstance(sender_obj,QtGui.QAction):
sender_obj.setChecked(checked)
def add_sub_item(self, base_menu):
sub_menu_name, ok = QtGui.QInputDialog.getText(
self,
'Sub Menu',
'Name of new Sub Item:'
)
if ok:
action = QSubAction(sub_menu_name, self)
slot = functools.partial(
self._callActionItem,
action
)
action.setCheckable(True)
action.setChecked(True)
action.toggled.connect(slot)
base_menu.addAction(action)
def _callActionItem(self, checked, action):
# This is called twice, False and True again
print '>>> sub check-state : ', action.isChecked()
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
window = Example()
window.show()
sys.exit(app.exec_())