# [NTG-context] Chapter number retrieval

Willi Egger context at boede.nl
Tue Mar 22 23:55:13 CET 2022

Hello Sreeram!

What a nice and simple solution. After fiddling a bit I got it working also in my environment for the book! — Thank you so much for the support.

Kind regrards

Willi

> On 22 Mar 2022, at 03:29, śrīrāma via ntg-context <ntg-context at ntg.nl> wrote:
>
> On Tuesday, March 22, 2022 2:17 AM Willi Egger via ntg-context wrote:
>> I would like to typeset the chapter title without number in the text. — However I still would need to retrieve the number for a calculation in a MetaFun graphic. I assume, that even though this number is not typeset, it is kept in the background. How to retrieve it?
>>
>
> Hi,
> On Tuesday, March 22, 2022 2:17 AM Willi Egger via ntg-context wrote:
>>
>> I would like to typeset the chapter title without number in the text. — However I still would need to retrieve the number for a calculation in a MetaFun graphic. I assume, that even though this number is not typeset, it is kept in the background. How to retrieve it?
>>
>
> Hi,
>
> You can define a custom command for the chapter, where the first argument (i.e, the number) is 'ignored' –
>
> \define[2]\ChapterTitle{#2}
>
> It will still appeared as numbered in any lists (ToC, etc). Also, it can be accessed using \headnumber[...][...]. An example graphic –
>
> \startuseMPgraphic {graphic:chapter}
> picture cg;
> cg := outlinetext.d
>       (withcolor transparent(1,0.5,blue));
> fill boundingcircle cg withcolor transparent(1, 0.5, lightgray);
> draw cg;
> \stopuseMPgraphic
>
> Using \headnumber[..][..] any 'conversion' applied to the chapter number (romannumerals, words, etc) are also preserved.
>
> Best,
> Sreeram
>
>
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