Quote Originally Posted by blukske
I looked into it, but it requires a lot of additional signal/slot administration.
I meant did you look into its source code while trying to find where mapFromSource and mapToSource are called.

Don't give up. All you need is to reimplement mapToSource and mapFromSource. And when I think of it, subclassing the abstract class directly could be the way to go, if you don't need the filtering and sorting functionality.