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hiCreateListBoxField,callBack

sritha

Hi Andrew,

 I have created the ListBoxField

box=hiCreateListBoxField(?name box

                                                 ?choices '("pfets" "nfets" "res")

                                                  ?callback "")

for the given choices  I need to trigger different  functions for each choice list.  Example: if  Iselect pfets in the appeared listbox field then it has to trigger pfets() function and  if I select nfets then it has to trigger nfets() function and so on. (pfets() and nfets() are user defined functions)  How to achieve this using callback?

Parents

  • Hi,

    well even I'am not Andrew ;-) I think I can answer this. The information about the selected item is available in the listbox callback so from there you may dispatch the required function:

    box=hiCreateListBoxField(
       ?name 'box
       ?choices '("pfets" "nfets" "res")
       ?callback (lambda (@rest args)
             (case (car (car args)->value)
                ("pfets"
                   (pfets)
                )
                ("nfets"
                   (nfets)
                )
                ("res"
                (res)
                )
             )
             t
          )
       )

  • in reply to mbracht

    Hi,

       I tried with your snippet,but it was showing error as Error : eval not a function "pfets".

  • in reply to sritha

    Er, that's because you haven't defined a function called pfets! You said that there were user-defined functions called pfets, nfets, res etc. If you do:

    procedure(pfets() printf("HELLO pfets\n"))
    procedure(nfets() printf("HELLO nfets\n"))
    procedure(res() printf("HELLO res\n"))

    The code is simply trying to call the function and if it doesn't exist, it gives an error. If you only want to call the function if it exists, you could do:

    box=hiCreateListBoxField(
  ?name 'box
  ?choices '("pfets" "nfets" "res")
  ?callback lambda((field scope)
    letseq(
      ((value car(hiGetListBoxValue(field))) (funcName value && concat(value)))
      when(funcName && isCallable(funcName)
        errset(funcall(concat(car(hiGetListBoxValue(field)))) t)
      )
    )
  )
)

    This also checks that a value was specified (the earlier value did that, but I omitted it from the inline version - this can happen if you use ctrl-click to deselect any item in the listbox).

    Andrew.

Reply
  • in reply to sritha

    Er, that's because you haven't defined a function called pfets! You said that there were user-defined functions called pfets, nfets, res etc. If you do:

    procedure(pfets() printf("HELLO pfets\n"))
    procedure(nfets() printf("HELLO nfets\n"))
    procedure(res() printf("HELLO res\n"))

    The code is simply trying to call the function and if it doesn't exist, it gives an error. If you only want to call the function if it exists, you could do:

    box=hiCreateListBoxField(
  ?name 'box
  ?choices '("pfets" "nfets" "res")
  ?callback lambda((field scope)
    letseq(
      ((value car(hiGetListBoxValue(field))) (funcName value && concat(value)))
      when(funcName && isCallable(funcName)
        errset(funcall(concat(car(hiGetListBoxValue(field)))) t)
      )
    )
  )
)

    This also checks that a value was specified (the earlier value did that, but I omitted it from the inline version - this can happen if you use ctrl-click to deselect any item in the listbox).

    Andrew.

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