The HID pcb currently supports a Lesstif interface, which is very
different than the Xaw or Gtk interfaces (yes, this is intentional).
We're working on re-integrating the Gtk interface (which should be the
same as before).
And could you write something more about the reason behind using
Lesstiff and Xaw in this project? Why is GTK+2 not good enough for you?
Most of the code using Xaw/Lesstiff/Athena/Tk I saw was some old
legacy/proprietary/commercial (or all three together) crap.
I'm not trying to evangelize GTK here but I'm curious why you choose
other (not really modern) toolkits rather than the new ones (which
should be better).