On Sun, May 24, 2009 at 4:00 PM, Wolfgang Schuster
<[email protected]> wrote:
>
> Am 24.05.2009 um 06:12 schrieb Zhichu Chen:
>
>> As you said before, in my problem, this kind of handler could break
>> something
>> like hyper-links, and I assume Yue wanted those kind of stuffs.
>
> I don't think this is a problem for this example because the page dimension
> are always the same while in the code for you the real and the calculated
> coordinates are different.
>
>> Maybe just a \start(stop)setups which changes the background back to
>> normal
>> and \prependtoks it to some token list. So is there an \everypage or
>> \everyshipout
>> token? Then using \setuphead (I don't know if it's appropriate) or
>> \appendtoks to every title page.
>
> I posted a code to enable/disable the backgroundcolor for certain pages
> not so long ago, take a look in the mail archive.
Found it. Well, then it's just as easy as it sounds:
\unprotect
\let\!!savedbackgroundcolor\empty
\def\onbackground
{\globallet\@@mapagebackgroundcolor\!!savedbackgroundcolor}
\def\offbackground
{\globallet\!!savedbackgroundcolor\@@mapagebackgroundcolor
\globalletempty\@@mapagebackgroundcolor}
\def\nobackground
{\globallet\@@mapagebackgroundcolor\!!savedbackgroundcolor
\globalletempty\@@mapagebackgroundcolor
\appendtoks\globallet\@@mapagebackgroundcolor\!!savedbackgroundcolor\to\afterpage}
\def\gobackground
{\globallet\@@mapagebackgroundcolor\!!savedbackgroundcolor
\appendtoks\globalletempty\@@mapagebackgroundcolor\to\afterpage}
\protect
\setuphead
[chapter]
[before=\gobackground]
\setupcolors[state=start]
\setupbackgrounds[page][background=color,backgroundcolor=lightgray]\offbackground
\starttext
\chapter{hello}
\dorecurse{10}{\input zapf\par}
\chapter{hello}
\dorecurse{10}{\input zapf\par}
\chapter{hello}
\dorecurse{10}{\input zapf\par}
\stoptext
>
> Wolfgang
>
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>
--
Best Regards
Chen
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Zhi-chu Chen | Shanghai Synchrotron Radiation Facility
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