Tkinter Menubutton
Summary: in this tutorial, you’ll learn how to use the Tkinter Menubutton
widget.
Introduction to the Menubutton
widget
A Menubutton
widget is a combination of a Button
and a Menu
widget.
When you click the Menubutton
, it shows a menu with choices. For example:
To create a Menubutton
widget, you follow these steps:
First, create a MenuButton
widget:
menu_button = ttk.Menubutton(container, **options)
Code language: Python (python)
Second, create a new instance of the Menu
class:
menu = tk.Menu(menu_button, tearoff=False)
Code language: Python (python)
Third, add one or more menu items to the menu instance. And you can add Checkbutton or Radiobutton widgets to the menu.
Finally, assign the Menu
to the MenuButton
instance:
menu_button["menu"] = menu
Code language: Python (python)
Tkinter Menubutton widget example
The following program illustrates how to use Menubutton
widget. When you click the MenuButton
, it’ll display a menu that consists of three choices: red, green, and blue.
The background color of the main window will change based on the selected menu item of the Menubutton
:
import tkinter as tk
from tkinter import ttkclass App(tk.Tk):
def __init__(self):
super().__init__()
self.geometry('300x250')
self.title('Menubutton Demo')
# Menubutton variable
self.selected_color = tk.StringVar()
self.selected_color.trace("w", self.menu_item_selected)
# create the menu button
self.create_menu_button()
def menu_item_selected(self, *args):
""" handle menu selected event """
self.config(bg=self.selected_color.get())
def create_menu_button(self):
""" create a menu button """
# menu variable
colors = ('Red', 'Green', 'Blue')
# create the Menubutton
menu_button = ttk.Menubutton(
self,
text='Select a color')
# create a new menu instance
menu = tk.Menu(menu_button, tearoff=0)
for color in colors:
menu.add_radiobutton(
label=color,
value=color,
variable=self.selected_color)
# associate menu with the Menubutton
menu_button["menu"] = menu
menu_button.pack(expand=True)
if __name__ == "__main__":
app = App()
app.mainloop()
Code language: Python (python)
How it works.
In the __init__()
method, we define a variable that tracks the selected value of the menu:
self.selected_color = tk.StringVar()
self.selected_color.trace("w", self.menu_item_selected)
Code language: Python (python)
If the value of the selected_color
is changed, the method menu_item_selected will be executed.
The create_menu_button()
method creates the MenuButton
:
First, create a Menubutton:
menu_button = ttk.Menubutton(
self,
text='Select a color')
Code language: Python (python)
Then create a new menu and add three Radiobutton
widgets derived from the colors
tuple to the menu:
# create a new menu instance
menu = tk.Menu(menu_button, tearoff=0)for color in colors:
menu.add_radiobutton(
label=color,
value=color,
variable=self.selected_color)
Code language: Python (python)
When you select a menu item, the value of the self.selected_color
variable changes to the value of the selected menu item.
Finally, associate menu with the Menubutton
:
menu_button["menu"] = menu
Code language: Python (python)
Summary
- Use Tkinter
Menubutton
widget to create a menu associated with a button.