GTK Development
From GnuCash
This part collects informations to facilitate the first steps in improving the GnuCash GUI.
Where are the source files?
The bad news: they are spread over the whole source tree - each module has its own files. But they have the suffix .glade and reside usually in a directory gtkbuilder below a directory containing gnome in its name.
They are xml files and you can work on them with glade3.