Ggi plotfield upgrade
                          =====================

The PlotField element from GIPSY's graphical user interface (Ggi) has
been modified so that it is capable of redrawing (parts of) the
element in case it has been obscured by other windows, etc.
So it now behaves correctly, even if the X server does not support
the backing-store and save-unders options.

However, if the X server supports these options, it may still be
advantageous to switch them on, because drawing in PlotFields can
then be more efficient. Ggi will detect the presence of these options
and act accordingly.

Affected tasks: funplot, gaufit2d, inspector, render, rotmas,
sliceview, xgaufit, xgauprof.


                                               Hans Terlouw, May 14, 2003