Tkinter Menubar And Checkbox Keep Open

I am making a menubar in tkinter in one of the menu in the menu bar, I have some check_button and when one of these check_button is clicked, the menu closes, but I want to keep thi

Solution 1:

Below example opens View back each time a checkbutton is selected:

import tkinter as tk

root = tk.Tk()

test1, test2 = tk.BooleanVar(), tk.BooleanVar()

def cb():
    print(test1.get(), test2.get())
    root.tk.call('::tk::TraverseToMenu', root, 'v')

menubar = tk.Menu(root)
viewMenu = tk.Menu(menubar, tearoff = 0)
viewMenu.add_checkbutton(label = "Obstacles", variable = test1, command=cb)
viewMenu.add_checkbutton(label = "Ground", variable = test2, command=cb)
menubar.add_cascade(menu = viewMenu, label = "View")
root.config(menu = menubar) # win = tk.Tk()

root.mainloop()

See more info here and here.

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Based on the answer that accounts for windows' special case here a very similar code can be written as follows:

import tkinter as tk

root = tk.Tk()

if root._windowingsystem == 'win32':
    import ctypes

    keybd_event = ctypes.windll.user32.keybd_event
    alt_key = 0x12
    key_up = 0x0002deftraverse_to_menu(key=''):
        if key:
            ansi_key = ord(key.upper())
            #   press alt + key
            keybd_event(alt_key, 0, 0, 0)
            keybd_event(ansi_key, 0, 0, 0)

            #   release alt + key
            keybd_event(ansi_key, 0, key_up, 0)
            keybd_event(alt_key, 0, key_up, 0)

else:
    #   root._windowingsystem == 'x11'deftraverse_to_menu(key=''):
        root.tk.call('tk::TraverseToMenu', root, key)

test1, test2 = tk.BooleanVar(), tk.BooleanVar()
menubar = tk.Menu(root)
viewMenu = tk.Menu(menubar, tearoff = 0)
viewMenu.add_checkbutton(label = "Obstacles", variable = test1,
                            command=lambda : traverse_to_menu('v'))
viewMenu.add_checkbutton(label = "Ground", variable = test2,
                            command=lambda : traverse_to_menu('v'))
menubar.add_cascade(menu = viewMenu, label = "View")
root.config(menu = menubar) # win = tk.Tk()

root.mainloop()

key variable to the traverse_to_menu is 'v' as Alt - V opens the menu via keyboard. As in key needs to be the non-modifying key that by default opens the menu using keyboard.

Solution 2:

In my case, I did as follows:

first creating primary things as

window=Tk()
mb = Menubutton (window, text="Test", relief=RAISED)
var = BooleanVar()

Then adding some checkbutton as below:

mb.menu.add_checkbutton(label='Test btn', variable=var,command = lambda: menu_click("some input"))
#adding some other checkbuttons

Finally creating menu_click function:

def menu_click(input):
   if input == "some input":
      mb.menu.post(mb.winfo_rootx(), mb.winfo_rooty())

In which mb.winfo_rootx(), mb.winfo_rooty() are x and y coordinates of desired opennig location.