mlterm is a great terminal that has replaced my old faithful mxterm in emulating SGI desktop. I have made a nice SGI-like toolbar, but there's one thing I'm missing: SGI's original xwsh (winterm) changes the look of inactive up/down buttons and hides scrollbar when unneeded. As a bonus, buttons and scrollbar "light up" when one moves mouse pointer over them.
Would that be difficult to add these additional states (instead of just pressed) to pixmap engine?