| Re: PS device [message #13320 is a reply to message #13319] |
Fri, 30 October 1998 00:00  |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Harald Frey (hfrey@ssl.berkeley.edu) writes:
> Which system variable (if it exists) contains the information, if the
> current postscript device is set to portrait/landscape and
> encapsulated/non-encapsulated? I can see this informastion on the screen
> with the help,/device command, but how do I get this information into a
> variable or flag?
Well, no system variable is going to help you here.
You can, of course, always get the output of the HELP
command into a variable using the OUTPUT keyword. In
this case the information you want is on the fourth
line of the output:
IDL> Set_Plot, 'PS'
IDL> Help, /Device, Output=thisOutput
IDL> Print, thisOutput[3]
Mode: Portrait, Non-Encapsulated, EPSI Preview Disabled, Color Disabled
Now, you *could* look for the string "Portrait" in this
string and--failing to find it--conclude that you were in
landscape mode. Or, you could look for the string
"Non-Encapsulated" and failing to find it know you were
in Encapsulated mode. But RSI would not recommend this
course of action, since they reserve the right to change
the output of the HELP command at any time.
So what I do is use the PS_FORM program that you can
download from my web page. If it is used as below, you
can always know exactly how the PostScript device is
configured:
configuration = PS_FORM(/Initialize)
new_config = PS_FORM(Cancel=canceled, Defaults=configuration)
IF NOT canceled THEN BEGIN
configuration = new_config
thisDevice = !D.Name
Set_Plot, "PS"
Device, _Extra=configuration
... your graphic commands here ...
Device, /Close
Set_Plot, thisDevice
ENDIF
Cheers,
David
----------------------------------------------------------
David Fanning, Ph.D.
Fanning Software Consulting
E-Mail: davidf@dfanning.com
Phone: 970-221-0438, Toll-Free Book Orders: 1-888-461-0155
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Note: A copy of this article was e-mailed to the original poster.
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