Re: [Plplot-general] hard disk filling up

[Jay C. <jea...@is...>]

On Thursday 15 January 2004 10:27, Maurice LeBrun wrote:
> Heh.  That looks like the plot buffer.  As you create a plot under X, the
> plot buffer pseudo-device is written to, so that on window expose or redraw
> events, the prior contents of the window can be recovered.  It's closed at
> every end-of-page, and my guess is that you aren't issuing any.. LOL. 
> There really should be a size limitation on it though.. >1G is way, way too
> big. :)
>
> Although there is no API control for this, fortunately you do have access
> through the plplot stream pointer.  You can disable writing to the plot
> buffer entirely by setting pls->plbuf_write to 0.  Or keep it writing by
> default but control its contents through manipulating pls->plbufFile.  See
> src/plbuf.c for more info.

(I'm really impressed by the speed one gets answers from this mailing list, 
Thanks!)

This got a bit complicated, because I'm no experienced C-programmer. 
Fortunately one knows somebody who knows more. We found that pls was declared 
static, so inaccessible and out of pure intuition we decided to try out plsc 
which is also a PLStream. And it worked! The temporary file is now still 
open, but it doesn't grow anymore. 
Here is what I did in my application code:
...
#include "plstrm.h"
extern PLStream *plsc;
....
plinit();
plsc->plbuf_write=0;
....

I'm not sure if this was the right (or the best) way to do it, but I think I 
can be happy with it. Thanks to the developers of those cool libraries which 
make programming a lot more fun!

The next challenge will be user interaction for which I will need an 
eventhandler for our window. Just don't know yet how to accomplish this 
stuff.

Best regards,
Jay