In-depth resources on the Gtk::DrawingArea widget?

[Ney André de Mello Zunino <zunino inf ufsc br>]

Hello.

In my current project, I need to do some graph drawing of nodes from a 
knowledge base and, therefore, I intend to and will certainly need to 
become familiar with the DrawingArea widget. Is there any comprehensive 
tutorial available on the Web? The examples in the on-line book do help, 
but it would be nice to have more material.

By the way, since I couldn't get any responses on my previous thread 
about the DrawingArea widget [1], I decided to experiment. The problem I 
was having was that the /on_realize/ overriden method I defined in my 
derived class was *not getting called*. So, I decided to move the 
Gdk-related initialization code that would go in that method to the 
constructor, in spite of that being suggested as impractical in the 
on-line book. Guess what, it all worked fine. The GC was created 
successfully and I was able to use it in the /on_expose_event/ method. 
Has the libray implementation/organization changed so that it is now 
possible to do that or have I just benefited from a casuality?

[1] news://news.gmane.org:119/crhjb4$rs1$1 sea gmane org

Thank you,

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Ney André de Mello Zunino