GTK+ / Gnome Application Development . ... Hierarchy Summary . ... Miscellaneous Objects . This appendix is a quick tour of the GTK+ and Gnome object hierarchy. It includes GtkObject and all subclasses from both libraries, a brief description of each, and the header files the objects are found in. ... The testgtk and test-gnome programs that come with the GTK+ and Gnome libraries are also a good way to find widgets; many of the screenshots in this appendix are from those programs. ...