[PyQt] GraphicsItem, QObject Inheritance problem

[Phil Thompson]

On Wed, 30 Sep 2009 17:43:03 -0700 (PDT), Jason H <scorp1us at yahoo.com>
wrote:
> I am working on a hacked PyQt to play with the new animation features. So
> this isn't entirely kosher, however.
> 
> I have the following:
> class AffineItem(QGraphicsItem):
>       def __init__(self, ..., parent):
>           QGraphicsItem.__init__(self, parent)
> 
> class WrappedAffineItem(QObject, AffineItem):
>       def __init__(self ...):
>           QObject.__init__(self)
>           AffineItem.__init__(self, ..., parent)
> 
> The WrappedAffineItem needs to declare properties, so I have to inherit
> QObject.
> Here is the traceback of what I am getting:
> 
> Traceback (most recent call last):
>     i = WrappedAffineTextItem(text, ..., self.items['clipItem'])
>   File "C:\Qt\PyQt-win-gpl-4.5.2\Plaza.py" in __init__
>     AffineTextItem.__init__(self, '', font, brush, parent)
>   File "C:\Qt\PyQt-win-gpl-4.5.2\Plaza.py", line 8, in __init__
>     QGraphicsItem.__init__(self, parent)
> TypeError: argument 1 of PyQt4.QtCore.QObject() has an invalid type
> 
> Help?
> Thanks!

You can't multiply inherit from 2 C++ classes.

Phil