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Re: Change default value of system variable? [message #23839 is a reply to message #23837]

Fri, 23 February 2001 10:00

Martin Schultz
Messages: 515
Registered: August 1997

Senior Member

"K. Bowman" wrote:
>
> I prefer to plot with black lines on a white background, so in my
> idl_startup file I include
>
> !P.BACKGROUND = COLOR_24('white') ;Set background color to white
> !P.COLOR = COLOR_24('black') ;Set default draw color to black
>
> (COLOR_24 is my own routine.)
>
> This works fine until I change plot devices and then change back, viz.
>
> flow>idl
> IDL Version 5.3 (IRIX mipseb). (c) 1999, Research Systems, Inc.
> IDL> PRINT, !P.BACKGROUND, !P.COLOR
> 16777215 0
> IDL> SET_PLOT, 'PS'
> IDL> SET_PLOT, 'X'
> IDL> PRINT, !P.BACKGROUND, !P.COLOR
> 0 255
>
> This means that I have to include code to set !P.BACKGROUND and
> !P.COLOR in every time I switch graphics devices. Is there any way to
> change the default value of a built-in system variable?
>
> Thanks, Ken

Run IDL with dbx and try to find the place where !P.Background is set.
This may be a little cumbersome without the IDL sources, but after
about 5 years you may have found the solution ;-)

Now, honestly, I would recommend to follow David's advice to ALWAYS
set colors before issuing any plot command.

Cheers,

Martin

PS: Todd - still have a note lying on my desk to send you this object
file stuff. Just want to give it a few comments before sending it
(otherwise you'd be lost right away). Maybe in a couple of days...

--
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[[ Dr. Martin Schultz Max-Planck-Institut fuer Meteorologie [[
[[ Bundesstr. 55, 20146 Hamburg [[
[[ phone: +49 40 41173-308 [[
[[ fax: +49 40 41173-298 [[
[[ martin.schultz@dkrz.de [[
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[Message index]

		Re: Change default value of system variable? By: Kenneth P. Bowman on Fri, 23 February 2001 16:43
		Re: Change default value of system variable? By: Paul van Delst on Fri, 23 February 2001 11:56
		Re: Change default value of system variable? By: Craig Markwardt on Fri, 23 February 2001 11:14
		Re: Change default value of system variable? By: Martin Schultz on Fri, 23 February 2001 10:00
		Re: Change default value of system variable? By: davidf on Fri, 23 February 2001 09:21
		Re: Change default value of system variable? By: davidf on Fri, 23 February 2001 09:11
		Re: Change default value of system variable? By: Liam E. Gumley on Mon, 26 February 2001 07:45
		Re: Change default value of system variable? By: davidf on Fri, 23 February 2001 18:43

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