[NTG-context] Part head centering and empty header

[Johannes Graumann]

John R. Culleton wrote:

> I would take a different approach, with each part header (there
> can't be that many) enclosed in
> \startstandardmakeup
> and
> \stopstandardmakeup
> 
> To get the part into the TOC there is a command to write an
> entry manually, with \writetolist.

Thanks a lot for this comment. It solved my problem. I'm now using:

\defineXMLenvironment
  [appendices]
  {%
    \startappendices
      \setuppagenumbering
        [%
          way=bytext,%
          partnumber=no,%
          conversion=numbers,%
          location={header,right}%
        ]%
        \startstandardmakeup
          [%
            headerstate=empty,%
            pagestate=start%
          ]
          \framed
            [%
              width=\textwidth,%
              frame=off,%
            ]
            {%
              \ss\switchtobodyfont[60pt]\setupinterlinespace[line=2.8ex]
              Appendices
              \writetolist[part]{Appendices}{}
            }
        \stopstandardmakeup
  }
  {\stopappendices}

And it does exactly what I want.

Joh