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I just upgraded to Windows 11 and opened my app that previously looked and worked fine in Windows 10. I am using python 3.11.15 with tkinter.Scrollbar objects for the scrollbars (not ttk).

Some of my scrollbars are initializing with normal visuals, with arrows visible (number 1 in photo). Some of my scrollbars are initializing with no arrows visible (number 2 in photo). For number 2, the arrows and slider remain invisible if scrolled with mousewheel but become visible if the scrollbar is selected (number 3 in photo).

scrollbar images

When I use the top level window menu to select a different app or even the same app, I have it so all tkinter.Widget objects except the base container tkinter.Widget objects are deleted, all tkinter.Variable objects deleted from python and C backend, and then all new widgets and variables are created, including new scrollbars.

Sometimes the new scrollbars appear with arrows, sometimes without.

I am unsure how to replicate either behavior.

Can anyone explain what I need to do to make all my scrollbars initialize with the arrows visible in Windows 11?

Do I need to cycle a .focus() call through all my widgets after creating and gridding/packing them? Or do I need to use the tkinter.Scrollbar.activate(index=idk) where idk is one or all of the available options ("arrow1","slider","arrow2" or "")? OR is this just Windows 11 oddness and I should ignore it?

I don't believe there is anything wrong with how I've coded the scrollbar objects themselves, as this same behavior is shown in a tutorial I found here: https://pythonassets.com/posts/scrollbar-in-tk-tkinter/

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  • maybe you should send it to authors of tkinter/python as issue. Commented Sep 17 at 15:51
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    FWIW, I've noticed this Windows 11 with Python 3.13.2. If there's no content then my scrollbar looks like #1, but if there's something to scroll then it looks like #2 until hovered (#3), as you've described. All that said: this appears to be the expected behavior under Windows 11 because scrollbars behave this way in native apps too (e.g. Notepad). So to your question: "is this just Windows 11 oddness and I should ignore it?" - I think the answer is yes. Commented Sep 17 at 17:06
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