How do I change the overall theme of a tkinter application?

Question

I want to change the theme of my tkinter application to clam.

What is the code and where do I put it? I have tried:

from tkinter import *
from tkinter.ttk import *
s=ttk.Style()
s.theme_use('clam')

Appalachia

Use tkinter.ttk to get the the themed version of Tk. – Bastian

thanks, how do i change to clam, default, ect. – Appalachia

Answer 1

To change the theme, call .theme_use() with the theme's name as the argument.

From https://infohost.nmt.edu/tcc/help/pubs/tkinter/web/ttk-theme-layer.html

A number of operations related to themes require that you have available an instance of the ttk.Style() class (in the Python sense of class). For example, to obtain a list of the available themes in your installation:

>>> import ttk  # import tkinter.ttk as ttk for Python 3
>>> s=ttk.Style()
>>> s.theme_names()
('clam', 'alt', 'default', 'classic')

The .theme_names() method returns a tuple containing the names of the available styles. The 'classic' theme gives you the original, pre-ttk appearance.

To determine which theme you get by default, use the .theme_use() method with no arguments. To change the current theme, call this same method with the desired theme name as the argument:

>>> s.theme_use()
'default'
>>> s.theme_use('alt')
>>> s.theme_use()
'alt'

Rothwell

ImportError: No module named 'ttk'. – Appalachia

Sorry, Python 3: import tkinter.ttk as ttk – Rothwell

Answer 2

This post is pretty outdated, here is how you can easily set the theme in Python3 with just one line of code:

Add this below your "Tk()" line. For example:

window = Tk() # <--- Main window line

ttk.Style().theme_use('default') # <--- Change default to whichever theme you want to use.

Where 'default' is the name of the default theme. Change 'default' to any of the available themes that you like.

Here is a good list of themes with screenshots:

<-- Current themes as of 2020 -->

https://ttkthemes.readthedocs.io/en/latest/themes.html

Some themes from the list above are not included in the main tkinter download.

If this is the case, you can easily install the theme files that aren't included in the default ttk install by running this command:

python3 -m pip install git+https://github.com/RedFantom/ttkthemes

Hope this helped you!

Tompion

ttk.Style().theme_use('default') cannot be used with ttkthemes themes? please tell how to use it with ttkthemes – Rambling

Answer 3

>>> from tkinter import ttk

>>> s=ttk.Style()

>>> s.theme_names() """======== if you are under win 8.1 you must see ..
 ('winnative', 'clam', 'alt', 'default', 'classic', 'vista', 'xpnative') you can use for example 'clam' ===== """

>>> s.theme_use('clam')

Unbolt