Hi Saul,

Many thanks for instant help.

> > I'm trying to figure ut if there's any way that choices made by
> > user in dialog widgets can be remembered and used as values 
> > of those widgets next time dialog runs. 

> That is precisely how script dialogs currently behave; the last
> used  values are presented. These last values will be reset to
> their  original default values if 1) Script-fu is refreshed 
> ("Filters->Script-fu->Refresh Scripts") or 2) GIMP is restarted. 

Sorry, I mis-stated my problem.  I'd like dialog to come up with same 
widget values next time GIMP is started up.


> Tick quoting does not result in evaluation of the list elements.
> Use  'list' so that WRF_BIT_WIDTH gets evaluated and replaced by
> its  numeric value: 

Thanks, I think it I read that bit in the Scheme manual and forgot 


> If, however, the issue you are attempting to address is having the
>  last values retained across sessions (or survive a Script
> Refresh),  this would be possible by storing your script's last
> values in the  <gimpdir>/parasiterc file: 

(define (script-fu-woodrat image drawable bit-width)
   ; Substitute function owing to buggy parasite-attach behavior
   (define (fu-parasite-attach parasite)
     (gimp-parasite-attach parasite)
     (while (not (string=? (caddr parasite)
                           (caddar (gimp-parasite-find (car 
       (gimp-parasite-attach parasite)))

   ; Save the user-specified bit-width to an application parasite
   (fu-parasite-attach (list "WRF_BIT_WIDTH" 1 (number->string bit-

(script-fu-register "script-fu-woodrat"
   SF-IMAGE ...
   SF-VALUE "Bit width"
                 17 ; fallback value if first-time run
                 (string->number (caddar (gimp-parasite-find 

> Note that 'gimp-parasite-find' is only executed once: when GIMP is
>  initially loaded (or if scripts are refreshed). Even though the 
> parasite is saved every time the script is executed, it is
> actually  GIMP's internally stored last value (not the parasite)
> that is used in  determining the value for the 'bit-width'
> parameter. The only reason  you'd want to take these steps is to
> support last values across  different sessions. The behavior you
> desired (as expressed in the  first paragraph of your post) is
> already supported by GIMP. 

Sorry, mis-stated by requirement.  

parasites are just what I need.  Can't find much about them.

(list "WRF_BIT_WIDTH" 1 (number->string bit-width)))

First list member: parasite ID string. 

What's the second list member?  Flags, I understand from one search 
result I found.  Used?

Third list member: parasite value (must always be a string). So an 
RGB colour value would have to be stringified. unstrbreakup maybe?

Generally: do all the gimp-*-parasite-attach methods suffer from same 
bug, so should be reapplied til they work?



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                    -- Vice President Dan Quayle
                       to reporters in 10/88

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