| Re: XLOADCT under Windows 95 vs. Windows NT 4.0 [message #7167] |
Tue, 08 October 1996 00:00 |
Mark Hadfield
Messages: 783
Registered: May 1995
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Senior Member |
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imad@mit.edu wrote in article <533ue8$ia3@senator-bedfellow.MIT.EDU>...
> I'm having this strange problem using XLOADCT on our Windows 95
> machine. If I load up XLOADCT, the color table gets refreshed neither
> on the color band on the top, nor on the image I want to change the
> color table for. This even happens in the demo! On our Windows NT
> 4.0 machine on the other hand, XLOADCT behaves perfectly normally,
> from the prompt or in the demo.
Are you running the Win 95 machine at > 256 colours?
If IDL for Windows is run with the display set at > 256 colours, colours in
plot
windows are not affected by changes in the colour tables until the window
is redrawn.
I understand from a recent thread that this occurs with the Macintosh & X
Windows
Manager also.
I don't know of a work-around, except to reduce the colour depth on your
system (and
lose those lovely full-colour icons!). Under Mac and X, PSEUDO_COLOR
keyword to DEVICE
might affect this behaviour, but this keyword is not available for the WIN
device.
============================================================ ==
Mark Hadfield NIWA (Taihoro Nukurangi)
PO Box 14-901
m.hadfield@niwa.cri.nz Wellington, New Zealand
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| Re: XLOADCT under Windows 95 vs. Windows NT 4.0 [message #7182 is a reply to message #7167] |
Sun, 06 October 1996 00:00  |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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Imad Jureidini <imad@mit.edu> writes:
> I'm having this strange problem using XLOADCT on our Windows 95
> machine. If I load up XLOADCT, the color table gets refreshed neither
> on the color band on the top, nor on the image I want to change the
> color table for. This even happens in the demo! On our Windows NT
> 4.0 machine on the other hand, XLOADCT behaves perfectly normally,
> from the prompt or in the demo.
>
> Does anybody have any ideas? Thanks a lot!
This is the classic symptom of running your Windows 95 machine in
either 16-bit or 24-bit color mode. In either of these modes you have
to redisplay your graphic window to see the effect of the color changes.
For example, like this:
; Load a gray-scale color table and display the image.
LOADCT, 0
TVSCL, DIST(300,400)
; Load a red-temperature color table and re-display the image.
LOADCT, 3
TVSCL, DIST(300,400)
To restore your Windows NT behavior, use your monitor control panel to
configure your monitor for 8-bit (256 color) mode.
David
--
David Fanning, Ph.D.
Phone: 970-221-0438
Fax: 970-221-4728
E-Mail: davidf@fortnet.org
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| Re: XLOADCT under Windows 95 vs. Windows NT 4.0 [message #7184 is a reply to message #7182] |
Sun, 06 October 1996 00:00 |
Markus Heuer
Messages: 3
Registered: March 1996
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Junior Member |
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> Hi,
>
> I'm having this strange problem using XLOADCT on our Windows 95
> machine. If I load up XLOADCT, the color table gets refreshed neither
> on the color band on the top, nor on the image I want to change the
> color table for. This even happens in the demo! On our Windows NT
> 4.0 machine on the other hand, XLOADCT behaves perfectly normally.
> Imad Jureidini
> imad@mit.edu
> PS: We're running IDL 4.0.1 on both machines.
Dear Imad
on my Windows95 machine XLOADCT works fine. However, on another
machine running Windows 3.11, I experienced a similar problem
with IDL 4.0.1: plots simply didn't show up. It turned out that
the graphics driver was configured to 16 instead of 256 colors. Thus
you might check the Windows95 graphics setup (number of colors
and graphics adapter driver).
Cheers
Markus Heuer
Berne, Switzerland
heumar@thenet.ch
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