Henning Hraban Ramm schrieb am 26.08.2024 um 20:14:

Am 26.08.24 um 17:57 schrieb Wolfgang Schuster:

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Henning Hraban Ramm schrieb am 26.08.2024 um 17:41:

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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

Am 26.08.24 um 17:58 schrieb Aditya Mahajan:

On Mon, 26 Aug 2024, Henning Hraban Ramm wrote:

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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?

You need: \somenamedheadnumber{chapter}{current}

Thank you, esp. for the effort! See my other mail – expansion got into my way, and I found a different solution. Hraban