PyQt QMenus - Help in creating sub menu items from dictionary

Teh_Ki · March 8, 2019, 6:07pm

Hi everyone, I need some advice/ help in QMenus.

Currently I am trying to create/ add QMenus that are read off from a dictionary values.
However, the QMenus I am going for, have sub-menu items contain within.

And while I am able to create the main menu item from the dictionary, I am having trouble getting the sub menu items to be added into the created main menu.

In my following code, while I am able to get mains created, its sub items - eastern and western, I am unable to get it populated under mains.

class Example(QtGui.QMainWindow):
    def __init__(self, parent=None):
        super(Example, self).__init__(parent)
        self.main_menus = defaultdict(list)
        
        self.menu_listing = {'mains': ['eastern', 'western'], 'drinks': ['water', 'beer', 'soda']}
        self.initUI()
        

    def initUI(self):         
        self.setGeometry(300, 300, 300, 200)
        self.setWindowTitle('Context menu')    

        self.qmenu = QtGui.QMenu()
        add_item_action = QtGui.QAction('Add new main item', self,
            triggered=self.add_main_menu)
        self.qmenu.addAction(add_item_action)
        self.qmenu.addSeparator()

        # Creates/ Add in new menu items if there is an existing menu listing
        if self.menu_listing:
            for main_menu in self.menu_listing:
                self.add_first_tier(main_menu)

                # Add in any sub menu items of the main menu
                if self.menu_listing[main_menu]:
                    self.add_second_tier(self.menu_listing[main_menu])
                

    def contextMenuEvent(self, event):
        action = self.qmenu.exec_(self.mapToGlobal(event.pos()))

    def add_main_menu(self):
        new_main_menu, ok = QtGui.QInputDialog.getText(
            self,
            "name of main menu",
            "Name of new main menu : "
        )
        if ok:
            main_menu_action = QtGui.QAction(new_main_menu, self.qmenu)
            self.qmenu.addAction(main_menu_action)
            self.main_menus[main_menu_action] = None
    
    def add_first_tier(self, item):
        first_tier_action = QtGui.QAction(item, self.qmenu)
        self.qmenu.addAction(first_tier_action)
        
    def add_second_tier(self, items):
        # how to get the main menu created in add_first_tier()
        pass

Many thanks in advance for any replies.

MikeM · March 8, 2019, 8:58pm

Hey,

This might help:

github.com

mikemalinowski/qute/blob/master/qute/_menu.py

import os

from .vendor.Qt import QtWidgets
from .vendor.Qt import QtGui
from . import _utils


# ------------------------------------------------------------------------------
def menuFromDictionary(structure, parent=None, icon_paths=None):
    """
    This will generate a menu based on a dictionary structure, whereby
    the key is the label and the value is a function call. You can optionally
    pass an icon path, and any icon found in that location with the same
    name as a key will be used.
    
    :param structure: Dictionary to generate the menu from. This dictionary
        is built of key value pairs where the key is the label and the value
        can be one of the following:
            * Function : This function will be called when the 
                action is triggered

This file has been truncated. show original

That function recursively generates menus from dictionaries. It uses the keys as labels, and the values as callables, but if the value is a dictionary then it calls itself to generate a sub menu. This allows you to have as many depths as you want within the dictionary.

Hope that helps! Mike

Teh_Ki · March 11, 2019, 11:11pm

Hi Mike, thanks for getting back… It does not seems to be working for me though where my actual menu - self.qmenu is even populating with any items…