Copying Pads

Mark C. Szigety (mcsziget@mit.edu)
Sat, 10 Oct 1998 15:20:30 -0400

Rooters:
quick question. i have a pad in which i have drawn a figure (in this
case, the 2-D layout of a detector). i would like to draw other figures on
top of this detector (specifically, trajectories). however, i would like
to draw them one at a time and, thus, every time i hit a button to draw the
next event, i want the old event erased, but the original picture of the
layout to remain where it was. is there a quick way to do this? i just
don't want to redraw the layout every time a user wants to display a new
event. i can think of some solutions, but they are all memory intensive.
any suggestions?

thanks a bunch,
mark szigety