How can I make a Tkinter slider that scales logarithmically?

Question

On the slider, the values will vary from 0.05 to 100 (1 as the center) and as the user changes slider's position, it will update the output logarithmically as shown in the image:

How can I modify the intervals (labels under the slider) and the output in such a way?

Does this answer your question? [How to use tkinter slider \`Scale\` widget with discrete steps?](https://stackoverflow.com/questions/25745011/how-to-use-tkinter-slider-scale-widget-with-discrete-steps) — stovfl, Apr 23 '20 at 08:33

score 1 · Accepted Answer · answered Apr 23 '20 at 08:11

You can math it by setting a command for your Scale widget::

import tkinter as tk

root = tk.Tk()

label = tk.Label(root, text="1.00")
label.pack()
scale = tk.Scale(root, from_=-20, to=20, tickinterval=0.1, orient="horizontal", showvalue=0)
scale.config(command=lambda e: label.config(text=f"{10**(scale.get()/10):.2f}"))
scale.pack()

root.mainloop()

How can I make a Tkinter slider that scales logarithmically?

1 Answers1