| Re: Is that window open?? [message #8562] |
Thu, 03 April 1997 00:00 |
David Foster
Messages: 341
Registered: January 1996
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Senior Member |
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Brian Jackel wrote:
>
> In article <33427754.41C6@irc.chmcc.org> Phil Williams <williams@irc.chmcc.org> writes:
>
>> How would I check to see if a window ID is still open in a widget
>> program?
>
> For the "standard" set of windows, DEVICE,WINDOW_STATE=window_state
> works, but this seems to apply only to windows 0 to 30, and the Draw_widget
> comes out of a pool from 31 or more. I ran across this when trying to make
> a window manager which would remember plotting states in different windows,
> but never found a good way to handle widget windows.
I don't think this is correct, at least on my system which is
a Sparc 2 running IDL 4.0.1 . Check out the following session:
IDL> device, window_state=win
IDL> help,win
WIN BYTE = Array[36]
IDL> for i = 0, 50 do window, xsize=10, ysize=10, /free
IDL> device, window_state=win
IDL> help,win
WIN BYTE = Array[83]
IDL>
Now, win(0:31)=0, win(32:82)=1
I've used WINDOW_STATE to manage windows in draw-widgets within
a "show-image" application where we have over 100 windows up at
one time.
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
[ UCSD Mail Code 0949 ]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
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| Re: Is that window open?? [message #8567 is a reply to message #8562] |
Thu, 03 April 1997 00:00  |
steinhh
Messages: 260
Registered: June 1994
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Senior Member |
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In article <brian.jackel.115.5380EC62@uwo.ca>, brian.jackel@uwo.ca (Brian Jackel) writes:
[..]
|> For the "standard" set of windows, DEVICE,WINDOW_STATE=window_state
|> works, but this seems to apply only to windows 0 to 30, and the Draw_widget
|> comes out of a pool from 31 or more. I ran across this when trying to make
|> a window manager which would remember plotting states in different windows,
|> but never found a good way to handle widget windows. In the end I wrapped
|> the WSET inside an EXECUTE(), and caught the error (if any) that way. Please
|> post if some more graceful approach is possible.
|>
I don't think this is a problem - the array size returned
by the WINDOW_STATE keyword expands as you go (at least for
me), e.g.:
IDL> device,window_state=w
IDL> help,w
W BYTE = Array(32)
IDL> base=widget_base()
IDL> drw=widget_draw(base,xsize=10,ysize=10)
IDL> widget_control,base,/realize
IDL> device,window_state=ww
IDL> help,ww
WW BYTE = Array(33)
The reason I know is that I once made a system for saving/restoring plot
region states which works OK. It's available as a tiny part of the solarsoft
library (see e.g., http://www.space.lockheed.com/eit/ssw_setup.html)
If you don't want the whole package, the routines are called
pstore.pro, prestore.pro, pconvert.pro, pfind.pro, at
http://sohowww.nascom.nasa.gov/solarsoft/gen/idl/display/
There may be dependencies on other software in the solarsoft/gen tree,
though... at least the following:
../idl/string/trim.pro
../idl/system/get_viewport.pro
../idl/system/setscale.pro
../idl/system/setwindow.pro
Regards,
Stein Vidar
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| Re: Is that window open?? [message #8570 is a reply to message #8562] |
Wed, 02 April 1997 00:00 |
hegde
Messages: 17
Registered: December 1995
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Junior Member |
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In article <33427754.41C6@irc.chmcc.org>, Phil Williams <williams@irc.chmcc.org> writes:
> How would I check to see if a window ID is still open in a widget
> program?
>
> Here's what I did
> oldwin = !d.window
> wset, info.wid
>
> ; some code here
>
> ;--- restore the oldwin
> wset, oldwin
>
> and it crashes with
> % WSET: Window is closed and unavailable.
Use CATCH to trap the error signal and act accordingly. For example:
oldwin = !d.window
WSET, info.wid
; some code here
CATCH, err_status
CASE err_status OF
-324 : BEGIN
; do what you want when the window is closed
PRINT, 'warning ........'
END
ELSE : WSET, info.wid
ENDCASE
CATCH, err_status, /CANCEL
As in any other structured language, IDL doesn't define these error signals
as constants. Hence programmer is at a disadvantage, if RSI changes them with
each version.
Hope it helps.
-M. Hegde
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| Re: Is that window open?? [message #8571 is a reply to message #8570] |
Wed, 02 April 1997 00:00 |
David Foster
Messages: 341
Registered: January 1996
|
Senior Member |
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Phil Williams wrote:
>
> How would I check to see if a window ID is still open in a widget
> program?
>
> Here's what I did
> oldwin = !d.window
> wset, info.wid
>
> ; some code here
>
> ;--- restore the oldwin
> wset, oldwin
>
> and it crashes with
> % WSET: Window is closed and unavailable.
I think the most straightforward thing to do would be:
oldwin = !d.window
device, window_state=windows
case ( windows(info.wid) ) of
0: <window is closed...recreate or whatever>
1: wset, info.wid
endcase
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
[ UCSD Mail Code 0949 ]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~
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| Re: Is that window open?? [message #8573 is a reply to message #8570] |
Wed, 02 April 1997 00:00 |
Tim Patterson
Messages: 65
Registered: October 1995
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Member |
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Sorry if I'm on the wrong track, but wouldn't a window ID
being closed ina widget program also imply that the
container widget has disappeared too? Couldn't you check for
the widget existing still (I presume you're worried about
the user closing the window using the Window manager menu
rather than letting the program close it).
Tim
Phil Williams wrote:
>
> How would I check to see if a window ID is still open in a widget
> program?
>
> Here's what I did
> oldwin = !d.window
> wset, info.wid
>
> ; some code here
>
> ;--- restore the oldwin
> wset, oldwin
>
> and it crashes with
> % WSET: Window is closed and unavailable.
>
> Thanks,
> Phil
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| Re: Is that window open?? [message #8575 is a reply to message #8570] |
Wed, 02 April 1997 00:00 |
brian.jackel
Messages: 23
Registered: May 1996
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Junior Member |
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In article <33427754.41C6@irc.chmcc.org> Phil Williams <williams@irc.chmcc.org> writes:
> How would I check to see if a window ID is still open in a widget
> program?
For the "standard" set of windows, DEVICE,WINDOW_STATE=window_state
works, but this seems to apply only to windows 0 to 30, and the Draw_widget
comes out of a pool from 31 or more. I ran across this when trying to make
a window manager which would remember plotting states in different windows,
but never found a good way to handle widget windows. In the end I wrapped
the WSET inside an EXECUTE(), and caught the error (if any) that way. Please
post if some more graceful approach is possible.
Brian Jackel
temporarily at: jackel@danlon.physics.uwo.ca
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