| IDL 5.0 forgets about open windows (?) [message #9614] |
Wed, 23 July 1997 00:00 |
David Foster
Messages: 341
Registered: January 1996
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Senior Member |
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Version: { sparc sunos unix 5.0 Apr 28 1997} (Solaris 2.5)
Recently upon upgrading to IDL 5.0, we have noticed a strange
phenomenon regarding graphics windows. In one of our programs,
IDL seems to "forget" that there are any windows open, and the
next cursor operation results in window #0 being created. This
happens while the program has 4 visible windows displayed onscreen!
The program is quite complex, and the problem occurs after various
operations involving setting and unsetting windows, so it is *possible*
that this is programmer error, but I don't think so because:
1) This problem did/does not occur under 4.0.1
2) At a point in the program where the error occurs, and while
there are 4 visible windows onscreen, I include the commands:
HELP, !D, /STRUCTURE
PRINT, '*****************'
PRINT, '** Windows: *****'
DEVICE, WINDOW_STATE=WINDOWS
PRINT, WINDOWS
which result in:
** Structure !DEVICE, 17 tags, length=80:
NAME STRING 'X'
X_SIZE LONG 260
Y_SIZE LONG 120
X_VSIZE LONG 260
Y_VSIZE LONG 120
X_CH_SIZE LONG 6
Y_CH_SIZE LONG 10
FLOAT 40.0000
Y_PX_CM FLOAT 40.0000
N_COLORS LONG 214
TABLE_SIZE LONG 214
FILL_DIST LONG 1
WINDOW LONG -1
UNIT LONG 0
FLAGS LONG 65980
ORIGIN LONG Array[2]
ZOOM LONG Array[2]
*****************
** Windows: *****
0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 1 1 1 1 0 0 0
Should this ever be possible, where !D.WINDOW = -1 but there are
four windows currently available? I have applied a workaround to
this program, in which I wset to one of the available windows,
but I'm wondering where else this behavior might pop up. Any ideas?
Dave
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
David S. Foster Univ. of California, San Diego
Programmer/Analyst Brain Image Analysis Laboratory
foster@bial1.ucsd.edu Department of Psychiatry
(619) 622-5892 8950 Via La Jolla Drive, Suite 2200
La Jolla, CA 92037
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
"I have this theory that if we're told we're bad,
then that's the only idea we'll ever have.
But maybe if we are surrounded in beauty,
someday we will become what we see." - Jewel Kilcher
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