I want to be able to use scales to let the user answer various questions on screen. However, though I can get scales to work fine in other programs, in this one in particular they seem to have bugged out.

What's happening is that, if I set showvalue = False , I (sometimes) can't move the slider at all. If it's True , it will move, but the program acts like the mouse pointer (or the slider) is somewhere else -- it's almost like I'm using the bottom of the pointer to move it, but not quite.

I have absolutely no idea what could be causing these problems. I've gone through my code in search of something, but I don't even know where to begin to look. I made a separate test program that just produces a scale, to make sure it's not that I have a Mac... but that works perfectly. I put the same program as a function within my other program, and it messes up. I haven't done anything in the program to change mouse settings that I know of. (I'd post the program here, but it's enormous.)

Any help whatsoever would be greatly appreciated.

Okay, just wanted to let people know... through good old-fashioned commenting out sections, I finally pinpointed the problem. It was in the geometry manager. I had this (where sw and sh are the screen width and height respectively):

root.geometry("%dx%d+0+0" % (sw, sh))

and I changed it to this:

root.geometry("%dx%d+1+1" % (sw, sh))

And for some reason that fixed it. I don't know anything about the geometry manager, but there you go.

Must be something peculiar to the Mac OS, this code works fine on Windows:

import Tkinter as tk

def change(event):

root = tk.Tk()

# width x height + x_offset + y_offset (no spaces!)
root.geometry("%dx%d+%d+%d" % (150, 120, 0, 0))

v_red = tk.IntVar()
red = tk.Scale(root, label="Red", variable=v_red, from_=0, to=255)
red.bind('<B1-Motion>', change)

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