Henning Hraban Ramm schrieb am 26.08.2024 um 20:14:
Am 26.08.24 um 17:57 schrieb Wolfgang Schuster:
Henning Hraban Ramm schrieb am 26.08.2024 um 17:41:
Hi,
I’d like to check the chapter number like
\ifodd\rawcountervalue[chapter]
What an odd chapter!
\fi
but apparently the counter isn’t called "chapter", or I’m doing it
wrong otherwise.
Could you enlighten me?
\namedheadnumber{chapter}
Thank you, but it doesn’t work in my setup where I’m trying to change a
background image depending on the chapter number:
\defineoverlay[BG][\start
\ifodd\namedheadnumber{chapter}\relax
\externalfigure[bgimage][height=\overlayheight]
\else
\mirror{\externalfigure[bgimage][height=\overlayheight]}
\fi
\stop]
This is then used with
\setlayerframed[papier][background=BG]
I guess it’s expanded only once.
But it was a bad idea anyway, I wanted more than two variants and now
just set them as a uservariable.
Without more information there is no way to provide a solution but for
the archive there is below a solution to get mirrored images for even
chapters. The background has also a check an image before the start of
the first chapter.
\setupexternalfigure[location=default]
\defineoverlay
[BackGround]
[\ifzeronum\namedheadnumber{chapter}\relax
%
\orelse\ifodd\namedheadnumber{chapter}\relax
\externalfigure[mill][factor=min]%
\else
\mirror{\externalfigure[mill][factor=min]}%
\fi]
\setupbackgrounds[page][background=BackGround]
\starttext
FooBar
\chapter{Foo}
\chapter{Bar}
\stoptext
Wolfgang
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