In a simple 2D plotter built with visad, I'd like to detect which
line (or lines) the mouse is over. I have registered a DisplayListener
on the Display, but I am uncertain how to do two things:
- detect mouse motion events (now I just get MOUSE_PRESSED and RELEASEd)
- figure out which line the mouse is over
- display a small tooltip-like tranisent window on top of the display,
announcing the name of the line.
Tips on any of these points will be most welcome!