[Pythonmac-SIG] Boa OS X menubar bug (Re: wxPython apps keep crashing on me :-( )
adriano at euma.com
Tue Aug 16 00:49:41 CEST 2005
>I'm bringing one of the Boa core developers in on this in order to
>fill him in on the details of this bug. [...] but I see the same
>problem in the 0.4.4 release.
Thanks so much.
>What is happening is that when Boa loads and creates an object (i.e.
>wxMenuBar), it loads up RTTI.py and tests the various functions (at
>least getters) that can be called on wxMenuBar using the
>getMethodType function. In this case, it is calling
>wxMenuBar::GetClientRect (really, wxWindow::GetClientRect), but for
>whatever reason the wxMenuBar C++ object is not prepared for a
>GetClientRect() call and thus crashes.
>I say 'for whatever reason' because I didn't go through the Boa code
>well enough to know exactly what state the wxMenuBar is when this
>function is being called, but my guess is just that regardless,
>GetClientRect() on Mac doesn't expect to be called from wxMenuBar.
>On Mac, wxMenuBar really isn't a wxWindow at all but it derives from
>it for compatibility with other platforms.
>I can fix things at the wxMac/C++ level for GetClientRect (actually,
>GetClientSize and GetClientAreaOrigin), but that won't make it into
>wxPython until the next release.
> However, I do have to wonder why the getters are actually being
>called and tested. If the getter call fails somewhere in the C++
>code, it could lead to an assert at best, or crash at worst, for
>anyone trying to use Boa.
Kevin, thanks to YOU !
Ok, now I want to say a few things.
1) If you will fix the c++ side of this matter I'd be really grateful !
2) I understand that the fix will be available in the next release of
wxPython but don't worry. I have no commitment to this project I was
just trying to help. I think I'll try to use Boa on any Linux distro
I could install on my machine. I hope wx stuff is more stable, there.
As far as I could see, Boa is really nice and it is able to support
the creation of a GUI app well enough, for me.
3) Thanks for your higly informative words about what's going on
inside Boa that leads to this crash.
4) If I jump the menubar phase and step in the following phase I
could go on with the tutorial. I'm sure I'll find some other crashes
like this. Could it help if I report about them too ?
5) I found at least a crash occurring always in the same step also in
wxGlade. Could it help if I report about that too?
Thanks so much for your help, anyhow :-)
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