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Hi,
I'm lerning how to render CGAL objects in Qt.
I can render throw widget line segments without problem like this:

Arrangement_2   arr;
....
Arrangement_2::Edge_iterator  ith;      
for(ith = arr.edges_begin(); ith!=arr.edges_end(); ith++) {
   *widget << ith->curve();
}

But I cannot figure out how to render objects like circles, that are already
stored in arrangement.
e.g. objects from  this example
http://www.cgal.org/Manual/3.4/doc_html/cgal_manual/Arrangement_on_surface_2/Chapter_main.html#arr_fig:ex_13

Is it possible to use widget for it?

Thank you very much for your help
Martin