On Friday 23 May 2003 22:27, Dirk Schönberger wrote:
> > class KCanvasElement : public QObject {};
> > class KShapeCanvasElement : public KCanvasElement
> > {
> >   KShape *shape;
> > };
> > class KOpalCanvasElement : public KCanvasElement
> > {
> >   OPAL::Morph *morph;
> > };
> >
> > or something roughly like that. i don't think there needs to be any
>
> tighter
>
> > coupling between the two objects. KCanvasElement can define all the base
> > signals and slots that each object should respond too or emit. users can
> > further specialize these to provide additional stuff.
>
> But how do you want to implement rendering?

YourVeryOwnRenderingVisitor v.visit( *morph );

Bye
Lenny
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