I will let the people with far superior knowledge than I have work through this, but I am following it with interest. All I can say is that by adopting Aditya's solution, ensuring that for the unnumbered titles I also included 'number=no', the numbered chapters did increment correctly, after being interrupted by an unnumbered one.

Julian

On Thu, 13 Aug 2020, Wolfgang Schuster wrote:

Aditya Mahajan schrieb am 13.08.2020 um 04:53:

On Thu, 13 Aug 2020, jbf wrote:

Where running heads (headers) are concerned, if I use \chapter I have no
problems, nor should I expect any. But because I am also using \title,
given that I need some unnumbered chapters interspersed  among them, I
run into difficulties with headers. Numbered chapters have the correct
headers, unnumbered ones (with \title) either don't have them, or do not
have the proper chapter header (they pick up the header from the
previous numbered chapter).

At the moment the only thing I have in the preamble is the expected set
of commands for the numbered chapters:

   [{\hfill\getmarking[chapter]\hfill}][]
    [{\hfill\documentvariable{metadata:title}\hfill}][]

I thought that might work for the unnumbered ones (\title), thinking
that maybe \title inherits from \chapter, but it doesn't. But no amount
of variations on the above commands (repeating them but replacing
'chapter' with 'title'; adding [title] or just title, in the first set
of commands in various positions...) gives me the correct result.

I am assuming, of course, that there is a solution to this difficulty,
and that it may be simple. But I haven't found it. Is the problem that I
am using \title in the main body to get my unnumbered chapters? I
wouldn't think so? It produces the correct result, utlimatley, in the
TOC, Is it possible that I may have something else in my preamble that
is causing the problem? If so, I can't expect someone to 'guess' that
from outside! But at the moment I don't think that is the problem.

If not a direct solution, are there any clues someone might give me that
will lead me to finding my own solution? It would be much appreciated.

A rose by any other name would smell as sweet ...

\showframe
\setupheadertexts[\setups{header}]

\startsetups header
   \getmarking[chapter]
\stopsetups

\starttext
\startchapter[title={This is a chapter}]
   \input knuth
   \page
   \input knuth
\stopchapter

\startchapter[title={This is a title}, number=no]
   \input ward
   \page
   \input knuth
\stopchapter
\stoptext

Don't do this, unnumbered chapter still increase the counter and
when you add another chapter afterwards you wonder why the number
is wrong. 

(this reply is in jest ....)

incrementnumber=no, 

The correct way here is to reset the marking entries
at the begin of a new chapter or title with

\setuphead
  [chapter,title]
  [marking=reset]

Agreed. This is a better solution. Any idea why this is not the default?

Aditya

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