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Miron Brezuleanu and others
EXG is an Eiffel wrapper for Gtk+/Gdk. It is meant to help the Eiffel programmer to use the X Window system and the Gtk+ widget set.
This is a library of C code and Eiffel classes (mainly) which should help you develop X Window applications using Gtk+.
It consists largely of gtk-eiffel 0.03 by Paul Janzen and Francois Penneneach, but has been heavily modified. Many placeholder classes are now useful, and event wrapping is done. There are other modifications, the sources and the ChangeLog should contain a fairly complete list.
Another add-on is a turtle graphics library (just two classes). There is also a simple project generator (outputs the Makefile, gtk_cecil, loadpath.se, etc. for a brand new project). A simple wrapping of Imlib is now also in place.
EXG is portable to Win32 using Gtk+ Win32 and Cygwin32 Beta 20.1. The porting isn't yet automated, but it works - although the port of Gtk+/Gdk to Win32 is MUCH more unstable than the Linux version.