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Re: global variables in IDL [message #28648 is a reply to message #28647]

Wed, 26 December 2001 17:39

Kristine Hensel
Messages: 26
Registered: June 1999

Junior Member

Gert wrote:
>
> David,
>
> thanks for the tip - I could off course do it this way, but then i need to
> pass the pointer around to anyone who might need it. What i wanted to is
>
> pro Widgetpro,
>
> widgetID = getIDofGlobalswidget
> WIDGET_CONTROL, widgetID , GET_UVALUE=sGlobals, /NO_COPY
>
> print, sGlobal.threshold
>
> ...
> end
>
> is this possible? How can I do the 'getIDofGlobalswidget'?

If your global widget is registered using XMANAGER, i.e.
xmanager, 'global widget', base_id_of_global_widget
then the name and ID are stored in the MANAGED common block, which is
used by XREGISTERED.

To get the ID of the global widget, a calling procedure needs to use
this common block:
COMMON MANAGED, ids, names, outermodal

You can then look through the list of registered names to find the
widget(s) that you want:
validids = WHERE(ids ne 0, answer)
if (answer ne 0) then begin
registered = WHERE(names(validids) EQ 'global widget', answer)
if (answer ne 0) then begin
registered = validids(registered)
; get the IDs registered under this
; name:
global_ids = ids[registered]
endif ; name is registered?
endif ; some valid IDs?

I use something like this for an error message widget. All (ahem) the
error messages get stuck in the same widget, rather than popping up
individual messages, and I use this code to figure out whether an error
message widget has already been opened or whether a new one should be
created.

Kristine

--
Kristine Hensel e-mail: kristine@esands.com
Environmental Systems & Services phone: +61-(0)3-9835-7901
20 Council St., Level 3 fax: +61-(0)3-9835-7900
Hawthorn East, VIC, Australia 3124

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[Message index]

		Re: global variables in IDL By: Pavel A. Romashkin on Fri, 28 December 2001 08:39
		Re: global variables in IDL By: John-David T. Smith on Fri, 28 December 2001 08:22
		Re: global variables in IDL By: Pavel A. Romashkin on Wed, 26 December 2001 21:02
		Re: global variables in IDL By: Kristine Hensel on Wed, 26 December 2001 17:39
		Re: global variables in IDL By: Gert on Wed, 26 December 2001 17:02
		Re: global variables in IDL By: David Fanning on Tue, 25 December 2001 09:25

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