On 13 Oct 2023, at 09:36, David C. Partridge <david.partri...@perdrix.co.uk> 
wrote:

An application I own has a custom dual progress dialogue.    It has worked 
without problem since 15.5 up until 6.5.1 inclusive.

If we build using 6.5.3 (or 6.6), and run the application, then when we 
minimise/restore the main window the dlg vertical size is reduced, clipping the 
content.  If you repeat the minimise/restore a couple of times, then all the is 
left of the dlg is the title bar.

We’re prepared for it to be our problem rather than a Qt problem, but haven’t 
any ideas on how to determine what’s causing this strange behaviour.

Suggestions of how we can debug this will be most welcome.  Trivial test cases 
don’t appear to show the problem.

Thanks, David


Hi David,

Which platform is this one, and what window flags are you using? Given that 
behavior changed between Qt releases, a JIRA ticket with the relevant details 
would be good.


Cheers,
Volker


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