[NTG-context] issue with JavaScript in Acrobat

Peter Rolf indiego at gmx.net
Mon Oct 7 13:21:16 CEST 2019


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
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