Can I add condition to ?choices on cdf

Hi Srikumar,

Of course the value of ?choices can be any valid SKILL expression - so the if() statement for itself is ok. The problem is the use of the global variable cdfgData - the system automatically assigns the cdf description to this variable whenever you open the 'Edit Instance properties' window on an instance or create a new instance. So the above code works only if at the time of it's execution cdfgData is set and pointing to the right cdf description - not a safe assumption! You should implement the behaviour you want in terms of a cdf callback for the AspectRatio cdf parameter. That callback should then set the choices  for the aspect_ratio parameter.

I played a little trying to implement this in terms of CDF callbacks:

cdfId=(cdfCreateBaseCellCDF (ddGetObj <lib> <cell>))
cdfCreateParam(cdfId
   ?name          "AspectRatio"
   ?prompt        "Aspect Ratio Switch"
   ?defValue      t
   ?type          "boolean"
   ?storeDefault  "yes"
   ?display       "t"
   ?callback      "AspectRatioCB()")

cdfCreateParam( cdfId
   ?name              "aspect_ratio"
   ?prompt            "Aspect Ratio"
   ?defValue          "1"
   ?type              "cyclic"
   ?choices           '("1" "2" "3")
   ?parseAsCEL        "yes"
   ?storeDefault      "yes")

(defun AspectRatioCB ()
   (let (aspect_ratio AspectRatio)
      AspectRatio = (car (setof param cdfgData~>parameters param~>name=="AspectRatio"))
      aspect_ratio = (car (setof param cdfgData~>parameters param~>name=="aspect_ratio"))
      aspect_ratio~>choices = (if AspectRatio~>value '("1" "2" "3") '("5" "6" "7" "8"))))

The above code does work with the new property assistant for an instance of the corresponding cell but unfortunately not for the 'Edit Instance Properties' dialog were modification of the the choices isn't reflected before you close the window and open it again