Can Tkinter Styles Be Extended Or Combined?

Let's say I have a style for a button. import Tkinter as tk import ttk root = tk.Tk() ttk.Style(root).configure('Border.TButton', borderwidth=4, relief='raised') I want another s

Solution 1:

Question: tkinter.Style be extended or combined?

1. Define your own class Style by inheriting from class ttk.Style.
2. Overload method .configure(... to implement extend=.
   1. Save every kwargs= options into the instance attribute self._style.
   2. On argument extend=, pre .configure(... using the options saved in self._style[...].
   3. Forward to the original ttk.Style.configure(....

import tkinter as tk
import tkinter.ttk as ttk

classStyle(ttk.Style):
    EXTENDS = 'extends'def__init__(self, parent):
        super().__init__(parent)
        self._style = {}

    defconfigure(self, cls, **kwargs):
        self._style.setdefault(cls, {}).update(kwargs)

        extends = self._style.get(kwargs.get(Style.EXTENDS), {})
        super().configure(cls, **extends)

        super().configure(cls, **kwargs)

Usage:

Note: To change only the font size, use None: font=(None, ....

class App(tk.Tk):
    def __init__(self):
        super().__init__()
        buttonbox = tk.Frame(self)
        buttonbox.grid(row=0, column=0)

        style = Style(self)
        style.theme_use('clam')

        style.configure('Border.TButton', 
                        font=('Helvetica', 10), borderwidth=4, relief='raised')

        style.configure('BorderBigFont.TButton',
                        font=(None, 24),
                        extends='Border.TButton')

        style.configure('BorderRed.TButton',
                        bordercolor='red',
                        extends='Border.TButton')

        for _style in ['Border.TButton', 'BorderBigFont.TButton', 'BorderRed.TButton']:
            btn = ttk.Button(buttonbox, text=_style, style=_style)
            btn.grid()


if __name__ == "__main__":
    App().mainloop()

Tested with Python: 3.5 - 'TclVersion': 8.6 'TkVersion': 8.6