[NTG-context] what are the interaction between \showframe and \realpageno in \startuseMPgraphic ?

[NTG-context] what are the interaction between \showframe and \realpageno in \startuseMPgraphic ?

[garulfo]

I can not figure out why this progress bar only works when \showframe is activated.
When you comment on \showframe, it's as if \realpageno is at zero.
(current version: 2024.04.01 08:59)

\showframe

\startuseMPgraphic{MonGraphisme_MP}
  numeric n ; n := \number\realpageno ;
  numeric m ; m := \number\lastpageno ;
  numeric h ; h := \overlayheight ;
  numeric w ; w := \overlaywidth ;
  numeric e ; e := 3mm;
  numeric r ; r := (((n-1)/(m-1))*w);
  fill fullsquare xscaled w yscaled e shifted (w/2, h/2) withcolor darkblue ;
  fill fullsquare xscaled r yscaled e shifted (r/2, h/2) withcolor darkred;
\stopuseMPgraphic

\defineoverlay [MonGraphisme_OL] [\useMPgraphic{MonGraphisme_MP}]

\setupbackgrounds [footer] [rightmargin] [background={MonGraphisme_OL}]

\starttext
\dorecurse{10}{\input tufte\page}
\stoptext

Any clue is warmly welcome
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[NTG-context] Re: what are the interaction between \showframe and \realpageno in \startuseMPgraphic ?

[Wolfgang Schuster]

garulfo@azules.eu schrieb am 20.04.2024 um 23:00:
> I can not figure out why this progress bar only works when \showframe is activated.
> When you comment on \showframe, it's as if \realpageno is at zero.
> (current version: 2024.04.01 08:59)
>
> \showframe
>
> \startuseMPgraphic{MonGraphisme_MP}
>    numeric n ; n := \number\realpageno ;
>    numeric m ; m := \number\lastpageno ;
>    numeric h ; h := \overlayheight ;
>    numeric w ; w := \overlaywidth ;
>    numeric e ; e := 3mm;
>    numeric r ; r := (((n-1)/(m-1))*w);
>    fill fullsquare xscaled w yscaled e shifted (w/2, h/2) withcolor darkblue ;
>    fill fullsquare xscaled r yscaled e shifted (r/2, h/2) withcolor darkred;
> \stopuseMPgraphic
>
> \defineoverlay [MonGraphisme_OL] [\useMPgraphic{MonGraphisme_MP}]
>
> \setupbackgrounds [footer] [rightmargin] [background={MonGraphisme_OL}]
>
> \starttext
> \dorecurse{10}{\input tufte\page}
> \stoptext
>
> Any clue is warmly welcome

You need

     \setupbackgrounds[state=repeat]

which is set when you use \showframe.

Wolfgang

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maillist : ntg-context@ntg.nl / https://mailman.ntg.nl/mailman3/lists/ntg-context.ntg.nl
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archive  : https://github.com/contextgarden/context
wiki     : https://wiki.contextgarden.net
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