[GRASS5] Re: [GRASSLIST:2702] Re: Grass 5.7 smart display

[Hamish]

> > The problem:  
> > showing on the monitor 156 maps takes a long time, even if you have
> > a low resolution and your region is covers only one of the maps. 
...
> An alternative approach would be for d.rast to check whether the map
> intersects the current region. If it doesn't, and the overlay (-o)
> switch is used, then it can skip the drawing part (it still needs to
> update the cell/cell_list/list pads, though).
> 
> That approach would be more generally useful than something which is
> built into d.m. OTOH, it might still be too slow for 156 maps
> (particularly on Cygwin, where simply spawning a program 156 times
> would probably be too slow, even if the program itself did absolutely
> nothing).


Another drawing aggravation:

If you change the window size (drag the corner) while several maps are
displayed, it will redraw all the maps on the list to completion before
noticing the window size has changed, then blank and redraw everything
again. Is it possible/practicable to check for a window resize between
drawing commands or even ~4 times per map?

This can be tedious when working over a tunneled X connection with
complicated maps..


Hamish