| widgets and values [message #25943] |
Fri, 27 July 2001 13:35  |
Ralf Schaa
Messages: 37
Registered: June 2001
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Member |
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Hi there,
i like to have a widget doing the following:
PROBLEM1:
if the button 'range1' has been pushed, then change the UVALUE from
'range' to 'range1'
if the button 'range2' has been pushed, then change the UVALUE from
'range' to 'range2'
...
depending on the new uservalues in another program the rangings of the
plots are been set...
but for some reason it won't work, and actually i think to do it with
the UVALUE's isn't a bad idea, is it?
PROBLEM2:
when the USERVALUE's have been set,
i'd like to have a message like:"uservalue is now range1"
see the source below how i tried to do that
any suggestions? :-/
Ralf
some snipsnaps of the source:
--------------------------------------------------
PRO clus
...
desc1=REPLICATE({flags:0,name:' '},4)
desc1.flags=[1,0,0,2]
desc1.name=['Range','range1','range2','userrange']
...
but(8) =
CW_PDMENU(pan1,desc1,UVALUE='range',/RETURN_INDEX,FONT=butfo nt)
...
--------------------------------------------------
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
...
-------------------------------------------------
PRO plot
...
IF (UVALUE EQ 'range1') THEN BEGIN
;B_x
index=0
yranmax=[1024.,512.,256.,128.,64.,32.,16.,8.,4.,2.,1.]
IF maxmag0 GT 2048. THEN yrange = [0.,2048.] ELSE BEGIN
WHILE (yranmax(index) GE maxmag0) AND (index LT 10) DO BEGIN
print,'yranmax',yranmax(index),maxmag0
yrange0=[0.,yranmax(index)]
index=index+1
ENDWHILE
ENDELSE
...
ENDIF
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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
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Senior Member |
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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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