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Re: widgets and values [message #26068 is a reply to message #25943]

Mon, 30 July 2001 14:14

Pavel A. Romashkin
Messages: 531
Registered: November 2000

Senior Member

Ralf Schaa wrote:

> PRO clus_event
> ...
> WIDGET_CONTROL,eve.id,GET_UVALUE=uval
> ;
> CASE uval OF
> "range" : BEGIN
> CASE eve.value OF
> 1 : SET_UVALUE='range1' , PRINT, 'uservalue is now range1'
> 2 : SET_UVALUE='range2'
> 3 : SET_UVALUE='userrange'
> ENDCASE
> ...
> -------------------------------------------------

Sybtax is wrong. Need to use

Widget_control, eve.id, SET_UVALUE='range1'
print, 'uservalue is now range1'

Using user value is not a good idea in this case because then your
buttons are no longer invoking the same actions, once their uvalues
change. Use a field in the State structure of your widget tree to keep
information of this sort.
If placing more than one command on a line, use & between them.

BTW, have you ever considered getting a book on IDL? I can recommend
David Fanning's one, see
http://www.dfanning.com/documents/books.html
Or at least browse David's web site.
Good luck,
Pavel

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[Message index]

		widgets and values By: Ralf Schaa on Fri, 27 July 2001 13:35
		Re: widgets and values By: Pavel A. Romashkin on Mon, 30 July 2001 14:14

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