[issue41969] ttk.RadioButtons mis-sized under Windows 10 UI Scaling, with dpiAware set true

[Athanasius]

New submission from Athanasius :

Having recently looked into UI Scaling for an application I help develop I 
became aware with an issue involving tkinter.ttk.RadioButton and Windows UI 
Scaling.

When you have some UI Scaling set along with dpiAware set true you might find 
that radio buttons are mis-rendered. The usual manifestation of this is that 
the last button will be properly sized initially, with the others being 
undersized. If you even only mouse-over the 'correct' radio button it will then 
become undersized as well.

For more detail see: https://github.com/Athanasius/tk-radio-buttons

NB: This *has* been fixed upstream in the Tcl/Tk source, but I see they've not 
made a new release since 8.6.10 in November 2019.  Thus this issue is more in 
the way of a heads up about a bug others might encounter, and will have to wait 
for newer Tcl/Tk in some version of Python for it to be fixed.

See https://core.tcl-lang.org/tk/info/3c6660b6f0bed337 for the issue and fix.

--
components: Tkinter
messages: 378171
nosy: Athanasius
priority: normal
severity: normal
status: open
title: ttk.RadioButtons mis-sized under Windows 10 UI Scaling, with dpiAware 
set true
type: behavior
versions: Python 3.9

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[issue41969] ttk.RadioButtons mis-sized under Windows 10 UI Scaling, with dpiAware set true

[Serhiy Storchaka]

Change by Serhiy Storchaka :


--
resolution:  -> third party
status: open -> pending

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[issue41969] ttk.RadioButtons mis-sized under Windows 10 UI Scaling, with dpiAware set true

[Terry J. Reedy]

Change by Terry J. Reedy :


--
stage:  -> resolved
status: pending -> closed

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[issue41969] ttk.RadioButtons mis-sized under Windows 10 UI Scaling, with dpiAware set true

[Athanasius]

Athanasius  added the comment:

I excitedy thought that you closing this issue meant that Python 3.9.3 or 3.9.4 
had the newer TCL and this fixed.

Sadly not.  I've just had GitHub build a fresh executable using Python 3.9.4 
(as evidenced by `Running on Python v3.9.4 (tags/v3.9.4:1f2e308, Apr  4 2021, 
13:14:17) [MSC v.1928 32 bit (Intel)]` in our logging) and this is still broken.

Out of a set of three radio buttons only the last is correctly scaled up when 
first viewed, the other two not being scaled up.  When I changed tab (a 
notebook) and back, even that third one is now not scaled up.

Any idea when Python will include a fixed TCL ?

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