Making Menu options with Checkbutton in Tkinter?

Question

I am making a Menu using Tkinter, but I wanted to put "add_checkbutton" instead of "add_command" into the menu options, but problem is: how i deselect/select a checkbox?

menu = Menu(parent)

parent.config(menu=menu)

viewMenu = Menu(menu)

menu.add_cascade(label="View", menu=viewMenu)
viewMenu.add_command(label = "Show All", command=self.showAllEntries)
viewMenu.add_command(label="Show Done", command= self.showDoneEntries)
viewMenu.add_command(label="Show Not Done", command = self.showNotDoneEntries)

Answer 1

You need to associate a variable with the checkbutton item(s), then set the variable to cause the item to be checked or unchecked. For example:

import tkinter as tk

parent = tk.Tk()

menubar = tk.Menu(parent)
show_all = tk.BooleanVar()
show_all.set(True)
show_done = tk.BooleanVar()
show_not_done = tk.BooleanVar()

view_menu = tk.Menu(menubar)
view_menu.add_checkbutton(label="Show All", onvalue=1, offvalue=0, variable=show_all)
view_menu.add_checkbutton(label="Show Done", onvalue=1, offvalue=0, variable=show_done)
view_menu.add_checkbutton(label="Show Not Done", onvalue=1, offvalue=0, variable=show_not_done)
menubar.add_cascade(label='View', menu=view_menu)
parent.config(menu=menubar)

parent.mainloop()