[Sorry if this appears twice: webmail and character encoding issues...] On Tue, 2 Nov 2004 13:22:28, Fredrik Juhlin wrote: >On Monday 01 November 2004 19.30, David Boddie wrote: >> >> This sounds a lot like the problems you can experience when embedding >> Python in C++ applications through a dlopened plugin mechanism. >> Can you successfully "cast" the widget pointers to the appropriate >> types by using sip.unwrapinstance and sip.wrapinstance functions? >First: We're not embedding Python in a C++ app. It's a pure Python >application. OK. When people talk about getting objects from C++ land, I tend to assume that they're embedding Python. >Not knowing a whole lot about SIP, I looked through the SIP docs and added >the following lines of code at a known trouble spot (setting the text of >QLabels in forms), which I believe is what you meant I should try (if I got >it wrong, let me know :): >if not isinstance(labelWidget, qt.QLabel): > import sip > apa = sip.unwrapinstance(labelWidget) > foo = sip.wrapinstance(apa, qt.QLabel) > labelWidget = foo That's what I meant. It's really only meant for peculiar situations involving embedded interpreters, so you shouldn't need it here because SIP will do the right thing. I ran the test program that you posted in another message (http://mats.imk.fraunhofer.de/pipermail/pykde/2004-November/008977.html) and found that it always crashed the second time I clicked the update button. I changed oldForm.close(1) in line 33 of test.py to oldForm.close() and experienced no crashes for the admittedly short time that I ran it again. I think that the problem may be that you're instructing Qt to delete the objects on the C++ side, and SIP isn't too happy about this later on. Hope this helps, David
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