[PyQt] Multiple inheritance involving KXMLGUIClient does not work?

Phil Thompson phil at riverbankcomputing.co.uk
Sat Aug 11 22:20:14 BST 2007

On Saturday 11 August 2007 8:17 pm, Jim Bublitz wrote:
> On Saturday 11 August 2007 11:48, Adeodato Simó wrote:
> > Hello.
> >
> > I'm having problems with KXMLGUIClient; in particular, it seems
> > subclassing from it does not work when multiple inheritance is involved.
> > See the script below. If this gets fixed, the attached example should
> > work as well.
> >
> > (I seem to be pushing PyKDE to its limits, and I've already found three
> > non-working features which I need for my application. As I've said
> > before, I understand that you're not very inclined to fix them for KDE 3,
> > but what are the odds that they'll work in KDE 4? I guess my application
> > can live without them until then, but I'd like to know if the future
> > will indeed be better. I'm afraid all I can provide is
> > working/non-working C++/Python examples.)
> sip doesn't support multiple inheritance in Python classes . It does
> support C++ classes which have multiple base classes, so you could create
> your own C++ classes that inherit from KXMLGuiClient and QObject and wrap
> them.
> It won't work in PyKDE4 either. It won't change unless Phil modifies sip,
> and I suspect there are good reasons why that isn't going to happen, but
> can't speak for Phil.

The good reason is that it's impossible to implement without a standard way 
for creating new C++ types dynamically.


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