issue with JavaScript in Acrobat

issue with JavaScript in Acrobat

[Pablo Rodriguez]

Dear list,

I have this minimal sample:

    \setupinteraction[state=start]
    \setupinteractionscreen[option=max]
    \startJSpreamble {varia} used now
    var transitions = [1000,
    2000,
    3000,
    4000,
    5000,
    6000,
    7000,
    8000,
    9000];

    var msecs = 0;

    function step_clock() {
        try { ++msecs ;
        if ((msecs >= (transitions[this.pageNum]/10)) && ( this.pageNum
< this.numPages )) { ++this.pageNum; };
        } catch (e) {}
    }

    advance = app.setInterval ("step_clock()", 1);
    advance.count = 0;
    \stopJSpreamble
    \starttext
    \dorecurse{10}{\startTEXpage[pagestate=start, offset=1em]
        \pagenumber
    \stopTEXpage}
    \stoptext

Acrobat is required. And I have an issue with it

Each slide takes a full second (1000 milliseconds). But the conditional
in step_clock() needs to divide the elements from transitions array by
ten. Otherwise it is ten times slower.

Am I missing something here? Or why is "step_clock()" ten times slower
than it should be?

Many thanks for your help,

Pablo
--
http://www.ousia.tk
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Re: issue with JavaScript in Acrobat

[Peter Rolf]

Hi Pablo

Nearly no experience with JavaScript, no working Acrobat version
installed (no testing possible). So take the following with a grain of
salt...

I guess it's just the too small call interval of the "step_clock"
function. Calling it a thousand times per second doesn't seem to work.
If the function is called a hundred times per second only, your clock
counter is also incremented only a hundred times.

I would use a system clock value instead (difference between start time
and current time), so you can limit the call interval to a more
reasonable value (1/10s).


Regards, Peter


Am 06.10.2019 um 21:13 schrieb Pablo Rodriguez:
> Dear list,
>
> I have this minimal sample:
>
>     \setupinteraction[state=start]
>     \setupinteractionscreen[option=max]
>     \startJSpreamble {varia} used now
>     var transitions = [1000,
>     2000,
>     3000,
>     4000,
>     5000,
>     6000,
>     7000,
>     8000,
>     9000];
>
>     var msecs = 0;
>
>     function step_clock() {
>         try { ++msecs ;
>         if ((msecs >= (transitions[this.pageNum]/10)) && ( this.pageNum
> < this.numPages )) { ++this.pageNum; };
>         } catch (e) {}
>     }
>
>     advance = app.setInterval ("step_clock()", 1);
>     advance.count = 0;
>     \stopJSpreamble
>     \starttext
>     \dorecurse{10}{\startTEXpage[pagestate=start, offset=1em]
>         \pagenumber
>     \stopTEXpage}
>     \stoptext
>
> Acrobat is required. And I have an issue with it
>
> Each slide takes a full second (1000 milliseconds). But the conditional
> in step_clock() needs to divide the elements from transitions array by
> ten. Otherwise it is ten times slower.
>
> Am I missing something here? Or why is "step_clock()" ten times slower
> than it should be?
>
> Many thanks for your help,
>
> Pablo
> --
> http://www.ousia.tk
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________

Re: issue with JavaScript in Acrobat

[Pablo Rodriguez]

Hi Peter,

many thanks for your explanation.

I’m translating (I mean, I’m trying to translate) a method that worked
perfectly fine with milliseconds in ActionScript 2. This is the main
reason why the transitions are recorded in milliseconds.

The issue that I discovered now is that (even if I call it
“milliseconds”), the time unit variable “msecs” has milliseconds only
when app.setInterval is set to 1.

I don’t know how to use a system clock in JS (or in Acrobat). But this
is only a test to check how it works.

Many thanks for the advice on setting the interval to 10 ms. I realized
that I could divide the transitions by ten and it worked fine. No human
can spot the difference even in 0.1 secs. That simple math operation
wasn’t obvious to me (background in humanities 😅).

Many thanks again for your help,

Pablo


On 10/7/19 1:21 PM, Peter Rolf wrote:
> Hi Pablo
>
> Nearly no experience with JavaScript, no working Acrobat version
> installed (no testing possible). So take the following with a grain of
> salt...
>
> I guess it's just the too small call interval of the "step_clock"
> function. Calling it a thousand times per second doesn't seem to work.
> If the function is called a hundred times per second only, your clock
> counter is also incremented only a hundred times.
>
> I would use a system clock value instead (difference between start time
> and current time), so you can limit the call interval to a more
> reasonable value (1/10s).
>
>
> Regards, Peter
>
>
> Am 06.10.2019 um 21:13 schrieb Pablo Rodriguez:
>> Dear list,
>>
>> I have this minimal sample:
>>
>>     \setupinteraction[state=start]
>>     \setupinteractionscreen[option=max]
>>     \startJSpreamble {varia} used now
>>     var transitions = [1000,
>>     2000,
>>     3000,
>>     4000,
>>     5000,
>>     6000,
>>     7000,
>>     8000,
>>     9000];
>>
>>     var msecs = 0;
>>
>>     function step_clock() {
>>         try { ++msecs ;
>>         if ((msecs >= (transitions[this.pageNum]/10)) && ( this.pageNum
>> < this.numPages )) { ++this.pageNum; };
>>         } catch (e) {}
>>     }
>>
>>     advance = app.setInterval ("step_clock()", 1);
>>     advance.count = 0;
>>     \stopJSpreamble
>>     \starttext
>>     \dorecurse{10}{\startTEXpage[pagestate=start, offset=1em]
>>         \pagenumber
>>     \stopTEXpage}
>>     \stoptext
>>
>> Acrobat is required. And I have an issue with it
>>
>> Each slide takes a full second (1000 milliseconds). But the conditional
>> in step_clock() needs to divide the elements from transitions array by
>> ten. Otherwise it is ten times slower.
>>
>> Am I missing something here? Or why is "step_clock()" ten times slower
>> than it should be?
>>
>> Many thanks for your help,
>>
>> Pablo


--
http://www.ousia.tk
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: issue with JavaScript in Acrobat

[Henning Hraban Ramm]

Hi Pablo,
I used JS in Acrobat 7 and still have the documentation and some sample code – I don’t know if Adobe keeps it online.
If you like, I can send it to you off list.

Greetlings, Hraban
---
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http://wiki.contextgarden.net
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GPG Key ID 1C9B22FD

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________

Re: issue with JavaScript in Acrobat

[Pablo Rodriguez]

On 10/7/19 10:43 PM, Henning Hraban Ramm wrote:
> Hi Pablo,
> I used JS in Acrobat 7 and still have the documentation and some
> sample code – I don’t know if Adobe keeps it online.
> If you like, I can send it to you off list.

Hi Hraban,

the sample code will be useful to learn.

The documentation I have is:

  * “Developing Acrobat® Applications Using JavaScript™”
  * “JavaScript™ for Acrobat® API Reference”

Of course, I’m interested in other documents from Adobe.

Many thanks for your help,

Pablo
--
http://www.ousia.tk
___________________________________________________________________________________
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
archive  : https://bitbucket.org/phg/context-mirror/commits/
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___________________________________________________________________________________