CODEWITHSUNDEEP
pythonpyqtqmenu
Teh Ki
Teh Ki

Reputation: 455

QAction cannot be checked

I am 'converting' my (nested menus) QMenu object into a QAction (using setMenu) so that I can toggle checkboxes on them but the checkbox are unable to be toggled, it just remains as checked.

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 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.qmenu.addAction(test_action)



    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,
                str(base_menu.title()),
                str(sub_menu_name)
            )
            action.setCheckable(True)
            action.setChecked(True)
            action.toggled.connect(slot)
            base_menu.addAction(action)

    def _callActionItem(self, title, menu):
        pass


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    window = Example()
    window.show()
    sys.exit(app.exec_())

Upvotes: 0

Views: 1772

Answers (1)

Haru
Haru

Reputation: 2083

I usually use PySide. I tried to solve this question by using PySide.

As the result, please look this code and execute it. 

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 isinstance(action,QtGui.QAction):
            action.trigger()
        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,
                str(base_menu.title()),
                str(sub_menu_name)
            )
            action.setCheckable(True)
            action.setChecked(True)
            action.toggled.connect(slot)
            base_menu.addAction(action)

    def _callActionItem(self, title, menu):
        pass


if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    window = Example()
    window.show()
    sys.exit(app.exec_())

The points of change.

1.CustomMenu has MousePressEvent.

def mousePressEvent(self,event):
    action = self.activeAction()
    if isinstance(action,QtGui.QAction):
        action.trigger()
    return QtGui.QMenu.mousePressEvent(self,event)

If you click the action on the menu,you get the action. And you call action.trigger() And you can connect action.triggered Signal. yes,"triggered" is after "triggering".

2.to connect trigger.

self.connect(test_action,QtCore.SIGNAL("triggered(bool)"),self.unsetCheck_action)
def unsetCheck_action(self,checked):

        sender_obj = self.sender()
        if isinstance(sender_obj,QtGui.QAction): 


            sender_obj.setChecked(checked)

As you can see,if the test action is triggered,the triggered signal is called. And the slot is unsetCheck_action method.

for changing the action chack,you can manipulate only it seems that the trigger and not need to switch between True and False.

faled in PySide

In PyQt, it may be better to connect by test_action.triggered[bool].connect() But I could not do it by PySide.

I don't have PyQt4 in my machine. if you have some problems, please don't hesitate to ask me further information.

Upvotes: 2

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