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Re: Using package functions in Manipulate/DynamicModule

  • To: mathgroup at smc.vnet.net
  • Subject: [mg109212] Re: Using package functions in Manipulate/DynamicModule
  • From: Rui <rui.rojo at gmail.com>
  • Date: Sat, 17 Apr 2010 06:04:24 -0400 (EDT)
  • References: <hq0mqd$k0u$1@smc.vnet.net> <hq3a3s$nca$1@smc.vnet.net>

On Apr 13, 11:43 pm, Hannes Kessler <HannesKess... at hushmail.com>
wrote:
> On 13 Apr., 05:01, Rui <rui.r... at gmail.com> wrote:
>
>
>
> > Hey. My objective is to deploy in a Mathematica Player file a document
> > which has some interactive stuff, without any code visible. Ideally,
> > it would be all in a single file but I can live with sending a .m
> > package file too. So far so good.
>
> > Inside a DynamicModule I used some functions from a .m file I had
> > created some time ago. As expected, when I close the file and reopen
> > it, the dynamic gives errors everywhere.
>
> > First I thought there might be something magical similar to
> > SaveDefinitions that would automatically store in the cell everything
> > it needs to work fine. But I coulnd't find it. I tried wrapping it up
> > in a Manipulate with SaveDefinitons->True but doesn't work either.
>
> > So, I decided to try for the cell to just load the package whenever it
> > needs to be displayed for the first time.
> > "Initialization:>Needs["AddOns'"]" seemed to be perfect. However, it
> > doesn't work as expected.
> > For example: (SS and IListPlot are from AddOns.m)
> > Manipulate[
> > IListPlot[SS[p, 100] @@ Range[100]], {p, 1, 100, 1},
> >  Initialization -> Needs["AddOns`"], SaveDefinitions -> True]
> > doesn't work and tells me there are double definitions in Global` and
> > AddOns` of IListPlot and SS (right after starting the kernel)
>
> > The few times I've tried to use "Initialization" it gave me a
> > headache. I would have thought it just executes that whenever the
> > dynamicmodule/manipulate is displayed for the first time, but evidence
> > proves it isn't that simple, and I don't get it.
>
> > Perhaps I should put all of my package's variables in the
> > DynamicModule and copy the whole package inside?
> > When something that strikes me as useful and common is getting
> > convoluted and messy, it's a sign I'm overseing something and needing
> > your help.
>
> > Thanks a lot! ;D
>
> Try the following:
>
> Needs["AddOns`"];
> DynamicModule[{p},
>  Column[{
>    Slider[Dynamic[p], {1, 100, 1}] ,
>    Dynamic  @  IListPlot[SS[p, 100] @@ Range[100]]
>    }],
>  Initialization :> AbortProtect[Needs["AddOns`"]]]
>
> The first Needs makes sure the package is loaded when the
> DynamicModule is created.
> The second Needs initializes the package after quitting Mathematica
> and re-opening the notebook.
> It is important to use a RuleDelayed and not a Rule: Initialization ->
> Needs["AddOns`"] loads the output of Needs["AddOns`"] generated when
> the DynamicModule is created. This output is Null. Thus the package
> would not be loaded when the notebook is re-opened after quitting
> Mathematica.
> AbortProtect prevents time out errors in case the package needs a
> longer time to load.
>
> Best regards,
> Hannes Kessler

Very helpful. I was definately needing the AbortProtect tobreak
through my frustration on the issue


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