Re: data available for the header

[William Rehwinkel via LilyPond user discussion]

Dear Clyde,




Thanks,
-William

On 4/15/25 12:55, clyde wrote:

You should be able to do this with separate \book{} or \bookpart{} blocks. Try the example attached file. Does this achieve what you were hoping for?

I would like the page header to change on the fly as data about the composition changes. For instance, I'd like the header on the pages for each part of a quartet to indicate the part name. The page number changes, but info from the header field does not get changed. Is there some means to do that? Using

\fromproperty #'header:instrument

in one of the evenHeaderMarkup fields seems like the obvious method. The titles seem to get updated that way. But the page header doesn't change.

--
William Rehwinkel (any pronouns)
Juilliard School '26 - Oberlin Conservatory '24
will...@williamrehwinkel.net - https://williamrehwinkel.net
PGP Public Key: https://ftp.williamrehwinkel.net/pubkey.txt

\version "2.25.24"

partA = \relative c'' { c1 \pageBreak c1 }
partB = \relative c'' { g1 \pageBreak g1 }
partC = \relative c' { e1 \pageBreak e1 }
partD = \relative c' { c1 \pageBreak c1 }

\book { 
  \bookpart {
    \header {
      title="Title"
    }
    \score {
      <<
        \new Staff \partA
        \new Staff \partB
        \new Staff \partC
        \new Staff \partD
      >>
    }
  }
  \bookpart {
    \header {
      title="Title"
      instrument = "instrument 1"
    }
    \score {
        \new Staff \partA
    }
  }
  \bookpart {
    \header {
      title="Title"
      instrument = "instrument 2"
    }
    \score {
        \new Staff \partB
    }
  }
  \bookpart {
    \header {
      title="Title"
      instrument = "instrument 3"
    }
    \score {
        \new Staff \partC
    }
  }
  \bookpart {
    \header {
      title="Title"
      instrument = "instrument 4"
    }
    \score {
        \new Staff \partD
    }
  }
}

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