How to write a GtkCellRenderer-version of a GtkOptionMenu?

[Mirco Müller <mirco pool informatik rwth-aachen de>]

Greetings everybody!

   I am trying to figure out how to go about writing a custom 
cell-renderer. Initially I assumed that there is a a dedicated 
cell-renderer for a GtkOptionMenu. Unfortuately there isn't. Also the 
custom cell-renderers implemented for programs like "Mr Project" are not 
kind of widget I need.

   After googleing around the web and looking at the source-code of 
gtk+, gtkmm and mrproject I didn't get any real clue how to go about 
writing my own custom cell-renderer. It's just code "into your face" 
without any explanation. The chapter on GtkCellRenderer of the 
gtk+-manual isn't very informative either. Also the book on "gtk+/gnome 
application development" (http://developer.gnome.org/doc/GGAD/ggad.html) 
doesn't include any kind of introduction on writing your own 
cell-renderers. The gtk+-tutorial available at 
http://www.gtk.org/tutorial also doesn't cover cell-renderers in any way.

   Don't get me wrong here. I don't mind reading manuals, but a more 
dedicated documentation on this topic would really be helpful imho. I 
refuse to believe that it is that hard to write a custom cell-renderer 
based on parts that are available already (GtkCellRenderer and 
GtkOptionMenu).

   If you know of any documentation that gives a proper introduction to 
writing custom cell-renderers, please let me know.

Thanks in advance for your time and kind advice!

Best regards...

Mirco