Return identifying information about selected line in gui

I have a gui which plots topography with surf() at a given location, and allows the user to trace multiple faults. The tracings are stored as [x y] datapoints returned from ginput(). Each set of datapoints, (a set corresponds to one fault trace) are stored in their own cell. When replotted, the contents of every cell are plotted with plot3() on top of the topographic surface, so that all fault traces are visible.

I want to be able to go back and edit traces I've already made, which requires somehow selecting traces. I could simply allow the user to use the arrow keys to cycle back and forth between cell indices and plot the selected trace in a different color.

However, I was wondering if its possible to mouse click one of the plotted lines and retrieve identifying information (a handle, the points plotted, etc) that would tell me which line was clicked.