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Is there a way to access/modify external data from enterfunction doneProc without using globals?

hcjiv1

I know people have to do this all the time but I was not able to find a solution. Is there away to pass extra data to the doneProc of an enterfunction, for instance enterBox in this case? I need to add the box with it's options to an existing data structure and would rather not use global variables if it can be helped. Something like:

(define createNewBox

  (lambda (mystruct)

    (enterBox ?doneProc "myDoneProc")))

How do I inform myDoneProc about mystruct so it can add the resulting box to mystruct?

TIA,

-Harry

Parents
  • Andrew Beckett

    Hi Harry,

    The best thing would have been if the enter functions (such as enterBox) supported having the callback specified as a function object, in which case you could then pass a lexically scoped function which would then be able to call a function which can access your data structure in the same scope. Unfortunately that's not supported - it only allows a string (and it then calls it by appending the arguments). Some other human interface functions were updated a while ago to support function object callbacks, but not the enter functions.

    I came up with a fairly ugly workaround which avoids needing any global variables, but I'm not particularly comfortable with sharing it here (a colleague in R&D came up with a slightly different ugly workaround). So I think the simple answer for now is that you can't really do this. I would suggest you contact customer support and describe your requirement, and ask for a duplicate for CCR 2169313 to be filed on your behalf.

    Regards,

    Andrew.

Reply
  • Andrew Beckett

    Hi Harry,

    The best thing would have been if the enter functions (such as enterBox) supported having the callback specified as a function object, in which case you could then pass a lexically scoped function which would then be able to call a function which can access your data structure in the same scope. Unfortunately that's not supported - it only allows a string (and it then calls it by appending the arguments). Some other human interface functions were updated a while ago to support function object callbacks, but not the enter functions.

    I came up with a fairly ugly workaround which avoids needing any global variables, but I'm not particularly comfortable with sharing it here (a colleague in R&D came up with a slightly different ugly workaround). So I think the simple answer for now is that you can't really do this. I would suggest you contact customer support and describe your requirement, and ask for a duplicate for CCR 2169313 to be filed on your behalf.

    Regards,

    Andrew.

Children
  • hcjiv1
    in reply to Andrew Beckett

    Hi Andrew,

    Thank you! Yes a function object would be the ideal solution but I can see where that might be difficult since it would have to be called from within the skill event loop.  For now I will use a global variable. I'm not too concerned about two of my enterfunctions being active at the same time but I may implement the global as a lookup table to allow for that just in case.

    Thanks again!

    -Harry

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