CGAL users discussion list

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Hello,
I have one more general question connected with rendering objects.
I'm in the middle of research and I would like to confirm my thesis throw 
CGAL.

My idea is:
1) use CGAL geometrical tools and create arrangement (probably
Arrangement_2<Traits,Dcel>) that will contain curves, that were created as 
line
segments, circles, rays, circular arcs. 
2) draw content of arrangement throw Qt (maybe Qt_widget). 

My problem is, that I can't use just rendering edges, because some of them are
line and some curved. 
Is it even possible? Or I have to store all objects that I put in arrangement
in external lists(e.g. vector) and draw them from them?

In all open source application, that I found, there are used external object
for storing (separately) line segments, circles etc. Is it only way?

Thanks a lot for any help!

Regards,
Martin