Re: [NTG-context] afterpage

28 Aug 2006


      Peter Rolf wrote:
...
Hi Paul,
Paul Jones wrote:
...
Hello,
I have used Latex in the past and have the following code that inserts
information on certain pages using afterpage.  Is there some way to do a
similar thing in context?
\setupoutput[pdf]
\definelayer[info]
\setuplayer[info]
  [height=\paperheight,width=\paperwidth]
\setupbackgrounds[page]
  [background={text,info}]% info layer is above normal text layer
\def\WhichPage#1{%
  \def\docommand##1{\ifnum\pageno=##1\relax
    \setlayerframed[info][x=20mm,y=\dimexpr\paperheight-15mm,location=r]
    [background=color,backgroundcolor=white]
      {\tfb This page is inserted on page \number\pageno}\fi}%
    \rawprocesscommalist[#1]\docommand}%
...

lemme show you a few tricks:

(1) test for a number in a set (use \expanded{\doifinset....} if in doubt)
(2) use the rightbottom as preset

\def\WhichPage#1%
  {\doifinset{\realfolio}{#1}
     {\setlayerframed
        [info]
        [preset=rightbottom,x=20mm,y=15mm]
        [background=color,backgroundcolor=white]
        {\tfb This page is inserted on page \realfolio}%
       }}


\def\WhichPage#1%
  {\doifinset{\realfolio}{#1}
     {\setlayerframed
        [info]
        [preset=rightbottom,x=20mm,y=15mm]
        [background=color,backgroundcolor=white]
        {\tfb This page is inserted on page \realfolio}%
       }}

or cleaner (no macro and args involved):

\startsetups [at some pages]

  \setlayerframed
    [info]
    [preset=rightbottom,x=20mm,y=15mm]
    [background=color,backgroundcolor=white]
    {\tfb This page is inserted on page \realfolio}

\stopsetups 

\setupheadertexts[\doifinset{\realfolio}{3,4}{\directsetup{at some pages}}]

now, this inserts *as overlay*

however if one wants to insert something after a specific page, there is

% \startpostponing [pagenumber] [+pageoffset]
%
% \startpostponing[2]
%   PAGE 2 \blank
% \stoppostponing
%
% \startpostponing[+1]
%   PAGE +1 \blank
% \stoppostponing
%
% \startpostponing[+2]
%   PAGE +2 \blank
% \stoppostponing
%
% \starttext \dorecurse{4}{\input tufte \page} \stoptext


Hans


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