plan for introducing new curve widget

[Cyrille Berger]

On Monday 30 August 2010, Adam C. wrote:
> I've investigated KisCurve a little bit more and I found out, that
> KisCurve needs operator= and a copy ctor.
> 
> this is impossible on a pure virtual class afaik, so i thought of doing
> the following:
> create a class with copy ctor and operator = KisCurve
> create a pure virtual base class KisCurveBase and corresponding derived
> classes.
> 
> KisCurve holds instances of every derived class, so that it can copy and
> assign.
> it also holds KisCurveBase* currentCurve, which would be used to provide
> the correct transfer function and friends.
> 
> i am not sure, if this is a good design and i am open for improvements :)
or simply add a clone function to KisCurve :)
-- 
Cyrille Berger