Is there a conventional, simple way to make the fontsize of text option in a widget to fit?

Question

Let\'s say I have a button widget of arbitrary size,

• is there a conventional way to make its text to fit or let\'s say resize in proportion of the button\'s ne

Answer 1

No, there is nothing built-in. You can probably make it work, but tkinter is designed to work the other way around: you specify the text and the widget will automatically resize to fit.

Answer 2

Based on here and this I came up with the below code:

#! Python3

import tkinter as tk
from tkinter.font import Font

def resizeEvent(event, widget):
    #widget.unbind("<Configure>")

    #widget.grid_forget()

    widgetFont = Font(font=widget['font'])
    currentWidth = widget.winfo_width()
    currentHeight = widget.winfo_height()

    while ((widget.winfo_reqwidth() < currentWidth) and (widget.winfo_reqheight() < currentHeight)) and widgetFont['size'] > 1:
        widgetFont['size'] += 1
        widget['font'] = widgetFont

    while ((widget.winfo_reqwidth() > currentWidth) or (widget.winfo_reqheight() > currentHeight)) and widgetFont['size'] > 1:
        widgetFont['size'] -= 1
        widget['font'] = widgetFont

    widget['font'] = widgetFont

    #widget.bind("<Configure>", lambda event,  widget = widget : resizeEvent(event, widget))

def reqWidth(font, widget):
    return font.measure(widget['text'])

def reqHeight(font, widget):
    return font.metrics("linespace")

def font_resizable(widget, isResizable=True):
    if isResizable:
        widget.bind("<Configure>", lambda event,  widget = widget : resizeEvent(event, widget))

    else:
        widget.unbind("<Configure>")

if __name__ == "__main__":

    root = tk.Tk()
    frame = tk.Frame(root)
    frame.pack(fill="both", expand=True)
    frame.grid_rowconfigure(0, weight=1, uniform=True)
    frame.grid_rowconfigure(1, weight=1, uniform=True)
    frame.grid_columnconfigure(0, weight=1, uniform=True)

    button = tk.Entry(frame, text="A")
    button.grid(row=0, column=0, rowspan=1, sticky="nsew")

    button1 = tk.Button(frame, text="Dans et üstümde!")
    button1.grid(row=1, column=0, rowspan=5, sticky="nsew")

    font_resizable(button)
    font_resizable(button1)

    root.mainloop()

It's not exactly ideal and misbehaves in some examples, however I want to post this for reference, or a point to begin with at least.