[GRASS5] v.digit problems

[Markus Neteler]

On Thu, Feb 22, 2001 at 04:36:48PM -0400, Bob Covill wrote:
> Markus Neteler wrote:
> 
> > Bob,
> >
> > yes, that's a result due to the new pan method (Huidae will know more).
> > On fast machines (or accelerated video cards), you are not aware of
> > this. However, on a slower machine it might become annoying. I guess
> > it can be switched of with an env variable (flag).
> >
> > All GRASS variables are listed in
> > documents/envVars.txt
> >
> > (thanks to Justin). We should add explanations to the list and eliminate
> > the unused vars there.
> >
> > The file with above definition of the menu flicker is here (I think so):
> > src/mapdev/v.digit/slid_window.c
> > and/or: window.c
> >
> > I suggest to make the auto-pan method optional in a v.digit menu and/or
> > to be set with GRASS_AUTO_PAN=0/1
> >
> > Markus
> >
> 
> Markus,
> 
> The environment variables seem to have no affect on the "flashing menus".
> I took a look in the code and the cuplrit seems to be the "_Clear_base ()"
> call inside a while loop. In digitize.c on line 240 ...
> "while(yes_no = mouse_yes_no_zoom ( ....)' the mouse_yes_no_zoom function
> _uses the Clear_base() routine which I believe clears the screen until
> _mouse input is received.
> 
> If I remove the _Clear_base () from the mouse_yes_no_zoom function in
> mouse_yn.c and place it outside the while loop in digitize.c the problem
> is cleared up.  It would appear that the function is continually clearing
> the window when inside the while loop. There are a couple of other
> locations where where this Clearing is an issue.
> 
> If you want I forward the modified files with the problem corrected to see
> if it functions correctly in other environments.
Yes, please send it over.

Markus

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