Suitable gtkmm project to study and learn from

[Miguel Angel Polo <miguel polo telefonica net>]

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Hi all

I've almost finished the final release of my first project using gtkmm
(a simple L-System drawer). I'm very pleased with all the stuff I've
learned:gtkmm, autotools, a little OpenGL... and now I need to go beyond...

I'd like to learn "the real way things are done", the standards, the
best-practices... because there are lots of stuff that I have done "my way".

So, this question is pointed to every gtkmm developer around:

Which project (using gtkmm) do you consider a good one to learn from?
(once you have a "not-so-basic" knowledge on C++, OO design and so on)

PD: I'm trying to get some standard knowledge about collaborating on a
"real world" (GPL'd if possible ;) project.

PPD: Excuse my english


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