[Xastir] interrupting a map redraw?

[Curt Mills, WE7U]

On Fri, 4 Jul 2003, Gerry Creager N5JXS wrote:

> Ooh!  Sounds like it's time to rediscover unmaskable interrupts!

If it were only so easy...  NMI's.  Been a while since I've dealt at
that level, but it's a lot of fun!

I haven't heard too many reports yet about the new code, but it's
working pretty well for me.  I'm anxious to hear from others on
this.

I managed to ask X11 to check for further input just before checking
for the map draw interrupt flag, so I didn't have to do the one or
two second wait (for further keyboard/mouse input) before starting
a map redraw.

I initially had checks in the inner loops of some of the routines,
like geotiff/shapefile/geo routines, but took them out because they
slowed things down too much for normal operation.

Right now the checks for a map draw interrupt occur (mostly) between
each map file load.

-- 
Curt Mills, WE7U                    hacker_NO_SPAM_ at tc.fluke.com
Senior Methods Engineer/SysAdmin
"Lotto:    A tax on people who are bad at math!"
"Windows:  Microsoft's tax on computer illiterates!" -- WE7U
"The world DOES revolve around me:  I picked the coordinate system!"