[PyQt] adding signalling to QGraphicsItems

[Phil Thompson]

On Thu, 01 Jul 2010 11:58:01 +0200, "Christopher M. Nahler"
<christopher.nahler at papermodels.at> wrote:
> I want to add signalling functionality to scene items. In my case they 
> are usually QGraphicsRectItems..
> 
> I thought I could do this with deriving from QGraphicsObject but then I 
> loose all the funtionality for the rectangle, handling pens and brushes, 
> shapes etc.
> 
> Isn't it easier to just derive from QGraphicsRectItem and QObject? Or 
> should I derive from QGraphicsRectItem and QGraphicsObject instead?

Neither. You can't multiply inherit from more than one PyQt class.

> Or are there any other ways to do this?

Create a QObject subclass that implements your signals as an attribute of
your QGraphicsRectItem.

Phil