The ROOT GUI classes support a very extensive and rich set of widgets. The widget classes only depend on the X11 and Xpm libraries (so no need for Motif, Xaw, Xt, gtk, Qt, etc.) and they have the Win'95 look and feel.
The GUI classes are originally based on the LGPL'ed Xclass'95 widget library by Hector Peraza.
Although powerful and quite feature complete the major problem is that proper documentation is missing. This eventually will come but for the time being you will have to "program by example". To facilitate this we try to collect on this page pointers to non-trivial example code that will show how to use the different widget classes.
A basic introduction and mini tutorial is given in these documents:
Example code can be found here:NOTE: the ROOT GUI classes are for the time being only supported on Unix/X11 systems. Work on a Win32 port was started by Valery Fine but has never been finished due to other commitments. Any Win32 export who would like to help out is very welcome and will get all possible support from the ROOT team.