> Date: Tue, 23 Apr 2013 10:51:24 -0400
> From: adityam@umich.edu
> To: ntg-context@ntg.nl
> Subject: Re: [NTG-context] Set background color for a single page
>
> > Aditya, I want to know both please. Now I use the \start \definecolor
> > ... ... \startmakeup[standard] ... \stopmakeup \stopto assign a
> > specific color to the tilepage whose content is on a single page
> > exactly. But I don't know how to set the background for a single page,
> > say, page 3 if a document has more than three pages. Also, I don't know
> > how to cycle pages through a finite list of colors. Can you show me
> > that? Tim
>
> One way to do this is to set
>
> \setupbackgrounds[page][background=color, backgroundcolor=\PageColor]
>
> and define \PageColor such that it expands to an appropriate color. For
> arbitrary control, you can use a lua function, for example:
>
> \startluacode
> thirddata = thirddata or {}
>
> function thirddata.getpagecolor(num)
> -- A lua function that assigns colors based on page numbers
> if num == 3 then
> context("blue")
> elseif num == 5 then
> context("red")
> end
> end
> \stopluacode
>
> \def\PageColor%
> {\ctxlua{thirddata.getpagecolor(\rawcountervalue[userpage])}}
>
> \setupbackgrounds[page][background=color, backgroundcolor=\PageColor]
>
> \setuppapersize[S3]
> \starttext
>
> \dorecurse{10}{\input knuth \par}
>
> \stoptext
>
> You can also use a lua table to assign colors, and then you do not have to
> build a ladder of if statements.
>
> Aditya
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