Re: repeat layer recto pages

[jbf via ntg-context <ntg-context@ntg.nl>]

Muchas gracias Pablo, that was most helpful, and of course it works.

The particular part that I was missing (there was already 
alternative=doublesided in the preamble) of course was the 
\startsectionblockenvironment[bodypart], so thanks for highlighting that.

I was also a bit confused about the difference between state=repeat and 
repeat=yes, and I can see that both do work in the snippet you gave me, 
so perhaps there is no difference between these?

Julian

On 10/11/21 2:05 am, Pablo Rodriguez via ntg-context wrote:
> On 11/9/21 4:18 AM, jbf via ntg-context wrote:
>> I want a particular layer to repeat on recto pages only, but I don't
>> want this to happen in frontmatter, only in bodymatter.
>>
>> This is what I have done, just before the first chapter after
>> \startbodymatter (but unsuccessfully; the layer repeats for every page
>> at the moment. I must have omitted something).
> Hi Julian,
>
> this is what you want:
>
>    \startsectionblockenvironment[bodypart]
>      \setupbackgrounds
>        [rightpage]
>        [background=butterfly]
>    \stopsectionblockenvironment
>
>> \startbodymatter
>>
>> \setupbackgrounds
>>    [rightpage]
>>    [background=butterfly]
>>
>> \startchapter[title={Chapter title}]
>> \definelayer[butterfly]
>>       [x=0mm, y=0mm,repeat=yes,width=\paperwidth, height=\paperheight]
>> \setlayer[butterfly]
>>       [hoffset=.99\textwidth, voffset=1cm]
>>       {\externalfigure[bfly.jpg][width=1.5cm]}
>> \setupbackgrounds[page][background=butterfly]
> The last line adds backgrounds to every page. And without doublesided,
> there are not right and left pages.
>
> And you don’t need the \define and \setlayer after \startchapter.
>
> A complete sample would read:
>
>    \setuppagenumbering[alternative=doublesided]
>    \definelayer[butterfly][state=repeat]
>    \setlayer[butterfly]
>      [hoffset=.99\textwidth, voffset=1cm]
>      {butterfly}
>    \startsectionblockenvironment[bodypart]
>      \setupbackgrounds
>        [rightpage]
>        [background=butterfly]
>    \stopsectionblockenvironment
>
>    \def\rubbish%
>      {\dorecurse{2}
>        {\chapter{Chapter}
>          \dorecurse{25}{\input knuth}}}
>    \starttext
>    \startfrontmatter
>    \rubbish
>    \stopfrontmatter
>    \startbodymatter
>    \rubbish
>    \stopbodymatter
>    \startappendices
>    \rubbish
>    \stopappendices
>    \startbackmatter
>    \rubbish
>    \stopbackmatter
>    \stoptext
>
> I hope it helps,
>
> Pablo
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