Am 06.02.10 23:17, schrieb Peter Münster:
Hello,
How can I place an element as background at a previously defined position?
Here a test-file to show what I'm looking for:
\definelayer[graphics][position=yes]
\setupbackgrounds[page][background=graphics]
\starttext
Here is some text. I would like to appear a graphics exactly
behind \hpos{XXX}{HERE}. How can I do this, without measuring by hand the
x- and y-offsets, and perhaps also without using metapost?
untested:
\newcounter\BackgroundPictures
\definelayer[BackgroundPicture][width=\paperwidth,height=\paperheight]
\def\FixedPicture
{\dodoubleempty\doFixedPicture}
\def\doFixedPicture[#1][#2]%
{\doglobal\increment\BackgroundPictures
\xypos{fixedpicture:\BackgroundPictures}%
\doifnotmode{first}
{\setlayer
[BackgroundPicture]
[x=\MPx{fixedpicture:\BackgroundPictures},
y=\MPy{fixedpicture:\BackgroundPictures}]
{\externalfigure[#1][#2]}}}
\setupbackgrounds[page][background=BackgroundPicture]
\starttext
... \FixedPicture[...] ...
\stoptext
Wolfgang
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