Re: how to read out final "whichBar"

[Thomas Morley]

2017-11-03 9:42 GMT+01:00 Maurits Lamers <address@hidden>:
> Hi,
>
> I have been using scheme based engravers to capture all kinds of music 
> events. Until now I have dealt with bar lines by reading out the whichBar 
> property on the context of an event through
>
> (ly:context-property (ly:translator-context engraver) 'whichBar)
>
> However, this doesn't work for the final bar sign. I have also tried to read 
> out the translator object given to the finalize function, but when I read out 
> the whichBar property, it is invariably empty. What would be the best way to 
> figure out which type of bar is used at the end of a piece?
>
> Thanks in advance!
>
> cheers
>
> Maurits

You could do:

\version "2.19.65"

\score {
  {
    r2 r
    \break
    \bar "S"
    R1
    \bar "|."
  }
  \layout {
    \context {
      \Staff
      \consists
      #(make-engraver
         ((stop-translation-timestep engraver)
          (format #t "\nwhichBar: ~a"
                     (ly:context-property
                       (ly:translator-context engraver)
                       'whichBar)))
         (acknowledgers
          ((bar-line-interface engraver grob source-engraver)
            (ly:grob-set-property! grob 'after-line-breaking
              (lambda (grob)
                (format #t "\nglyph: ~a"
                           (ly:grob-property grob 'glyph))
                (format #t "\nglyph-name: ~a"
                           (ly:grob-property grob 'glyph-name)))))))
    }
  }
}


Note the difference for the grob-properties, due to line-break.

Cheers,
  Harm