GUBI has been an approach on implementing a graphical user interface
builder, based on the
Gtk+
Toolkit.
As of late August 1997, work has been abandoned for various personal
and technical reasons.
In January 1998, a new project
GLE
has been started, that imlements building facilities completely
different from the ones used formerly by GUBI, at least from a
technical viewpoint.
The source code for GUBI is still available, though it relies on a
very old version of the
Gtk+
Toolkit, that's totaly been revised since.
GUBI used to support little more than fourty widgets and already
implemented simplistic means for signal handler connections.
Here's an old screenshot of a "HELLO WORLD" example file
(`hello_world.gbc') that hides and shows a widget by using standard
gtk+ functions that are connected to the signals of the corresponding
buttons, without the need of a single line of C source.