ttk style text justification

[jvalenzuela]

Bug report

Bug description:

The justify ttk style option does not work starting with Python 3.14.7. Here is a small program demonstrating the issue:

import tkinter
from tkinter import ttk

root = tkinter.Tk()
ttk.Style().configure("TButton", justify=tkinter.CENTER)
ttk.Button(root, text="Foo Bar\nSpam Eggs").pack()
root.mainloop()

Python 3.14.6 and older yield correctly justified text:

With Python 3.14.7 the justification option seems to have no effect:

Both screenshots are from Windows 10(x64).

CPython versions tested on:

3.14

Operating systems tested on:

Windows

[picnixz]

cc @serhiy-storchaka Is it something that we recently changed? tkinter version maybe?

[terryjreedy]

14.7 got 9.0 upgrade. I see same on 3.15.0. 3.13, still 8.6, is centered.

[VimalN2005]

Hi @jvalenzuela,

Thanks for the clear reproducer. I was able to observe this behavior where the justify option for multiline text on TButton is not being respected in 3.14.7.

I would like to investigate this regression in Lib/tkinter/ttk.py (and verify behavior across different Tk themes such as default, clam, and platform-specific themes).

Could you please assign this issue to me, or let me know if I should go ahead with investigating and submitting a fix with tests?