You are a good guesser, Sean!
I tried commenting out the call I make to:
setAttribute(Qt::WA_DeleteOnClose);
when I’m setting up my main windows. With that commented out, things work
fine. I’m leaking the document window and everything it owns, of course, so
that isn’t great; but it works. So perhaps I can make a minimal document
window at startup, which I never show, just to make Qt happy.
The other quirk I’ve just noticed is that even *without* commenting out that
call, there is a usage pattern where everything works, and a different usage
pattern where it doesn’t. In my testing, I had been following the pattern that
doesn’t work. In summary:
WORKS: pressing command-W to trigger my Close menu item, which just calls
close() on the active window; my guess is that something about the processing
of the shortcut, or a different order of operations internally, makes this
usage pattern work properly. The Quit menu item, etc., appear after the window
is closed.
DOESN’T WORK: closing the active window by clicking its title bar close button
instead. The Quit menu item, etc., just vanish.
If there were something about the usage pattern that works that I could trigger
in the case of the usage pattern that doesn’t work, perhaps that would
constitute a workaround. However, Sean’s idea presently appears that it will
provide a workaround too, so I’ll try that first.
Thanks Sean!
Cheers,
-B.
Benjamin C. Haller
Messer Lab
Cornell University
> On Sep 22, 2020, at 2:56 PM, Murphy, Sean <smur...@walbro.com> wrote:
>
> I'm not on a Mac right now, so I can't try this, so I don’t know if this will
> work:
>
> As each window (I assume these are QMainWindow, or at least inherit from
> one) is closed, are you deleting them? If so, when you get to the last one,
> could
> you hide it instead of deleting it? Or when you've deleted the last one, then
> immediately create a new one and hide it?
>
> My theory being that maybe for Qt to do it's Mac menu magic, there needs
> to always be a QMainWindow present (but not necessarily shown)?
>
> Just a total guess on my part...
> Sean
>
>
> This message has been scanned for malware by Forcepoint. www.forcepoint.com
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