Re: multi-page floats

[luigi scarso <luigi.scarso@gmail.com>]

On Tue, Jun 5, 2012 at 2:00 PM, Henning Hraban Ramm <hraban@fiee.net> wrote:
> Sorry for coming back again and again, but I’m still stuck, and my deadline
> is overdue.
>
> * I need full-page pictures on defined pages in the middle of a chapter.
>
> * I don’t care if I must define "on page x" or "on the next right page after
> the current paragraph".
>
> - The only way for full-page pictures (i.e. bleeding over the page) that I
> know of is layers.
> - The only way to interrupt a story with full-page content that I know of is
> postponing.
> (makeups were a dead end so far - maybe they can help to get to a right page
> withput using \page[right])
>
> While each works for itself, I can’t get layers working within postponing.
>
> And when that works, I need to wrap it in a macro, since I alway need to
> define and postpone three sequential pages.
>
>
> Without postponing, this works:
>
> --- *** ---
> \setuppagenumbering[alternative=doublesided]
> \definelayer[bg][x=0mm,y=-3mm,width=\dimexpr(\paperwidth+3mm),height=\dimexpr(\paperheight+6mm)]
> %\definemakeup[rightpage][page=right]
>
> \def\DoublePic#1{
>        %\startmakeup[rightpage] % error!
>        \page[right]
>
>        \resetlayer[bg]
>        \setlayer[bg]{\externalfigure[#1][height=\dimexpr(\paperheight+6mm)]}
>        \setupbackgrounds[page][background=bg]
>        \strut
>
>        %\stopmakeup
>
>        % empty back of the first picture, since it’s printed on transparent
> paper
>        %\startmakeup[rightpage] % error!
>        \page[right]
>
>
>        \resetlayer[bg]
>
>  \setlayer[bg]{\externalfigure[#1-hg][height=\dimexpr(\paperheight+6mm)]}
>        \setupbackgrounds[page][background=bg]
>        \strut
>
>        %\stopmakeup
>        \page
> }
>
> \starttext
>
> \input tufte
>
> \DoublePic{koe}
>
>
> \input knuth
>
> \stoptext
>
> --- *** ---
>
> This doesn’t:
>
> --- *** ---
> \setuppagenumbering[alternative=doublesided]
> \definelayer[bg][x=0mm,y=-3mm,width=\dimexpr(\paperwidth+3mm),height=\dimexpr(\paperheight+6mm)]
>
> \def\DoublePicAt#1#2{
>        \startpostponing[#2]
>        \page[right] % tried also makeups...
>
>
>        \resetlayer[bg]
>        \setlayer[bg]{\externalfigure[#1][height=\dimexpr(\paperheight+6mm)]}
>        \setupbackgrounds[page][background=bg]
>        \strut
>
>        \page[right]
>        \setuppagenumber[state=start]
>
>        \resetlayer[bg]
>
>  \setlayer[bg]{\externalfigure[#1-back][height=\dimexpr(\paperheight+6mm)]}
>
>        \setupbackgrounds[page][background=bg]
>        \strut
>        \page
>        \stoppostponing
> }
>
> \starttext
>
> \DoublePicAt{hacker}{5}
>
>
> \dorecurse{30}{
>        \section{Knuth \recurselevel}
>        \input knuth
> }
>
> \stoptext
>
> --- *** ---
>
> Can you show me a way to use layers within postponing, please?
A first step --- still quite similar to your macro. Hope it helps just for now.

\setuppagenumbering[alternative=doublesided]
\definelayer[bg][x=0mm,y=-3mm,width=\dimexpr(\paperwidth+3mm),height=\dimexpr(\paperheight+6mm)]

\def\DoublePicAt#1#2{
       %\startpostponing[#2]
       \page[right] % tried also makeups...
       \resetlayer[bg]
       \setlayer[bg]{\externalfigure[#1][height=\dimexpr(\paperheight+6mm)]}
       \setupbackgrounds[page][background=bg]
       \strut

       \page[right]
       \setuppagenumber[state=start]

       \resetlayer[bg]
       \setlayer[bg]{\externalfigure[#1-back][height=\dimexpr(\paperheight+6mm)]}

       \setupbackgrounds[page][background=bg]
       \strut
       \page
       %\stoppostponing
}

\starttext
\startpostponing[5]
\DoublePicAt{hacker}{5}
\stoppostponing

\dorecurse{30}{
       \section{Knuth \recurselevel}
       \input knuth
}

\stoptext

-- 
luigi
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