[gtkmm] List/Treestore with external data

[Hagen Möbius <Hagen Moebius starschiffchen de>]

Hi gtk-gurus :)

I'm dead sure the following was asked before but I tried real hard to 
find any information and wasn't successful, so finally I'll try it here.

I'm developing a GUI-Frontend for a library that handles data objects 
which are connected in a tree-like structure. What I want, of course, 
is to display that structure in a TreeStore along with some details 
about each object. So all information is already given in the library 
objects.
Using the conventional TreeStore I'd have to insert the details into 
the store thus making a copy of each which, I think, is waste of 
memory. So y question is: Is there a way to make the TreeStore depend 
on external data? or Has anybody already implemented a derieved Store 
that does?

Many thanks in advance for replies ...

Hagen.