Re: Error in resolving number of staff lines

[Phil Holmes]

----- Original Message ----- 
From: "Marc Hohl" <address@hidden>
To: "Lily-Devel List" <address@hidden>
Sent: Friday, June 22, 2012 9:13 AM
Subject: Error in resolving number of staff lines


> Hello list,
>
> the following snippet prints a value of 5 in both cases,
> whereas the second system has
> only four staff lines. What's wrong here?
>
> Regards,
>
> Marc
>
> \version "2.15.41"
>
> #(define (test-bar-print grob)
>    (let* ((staff-symbol (ly:grob-object grob 'staff-symbol))
>           (line-count (if (ly:grob? staff-symbol)
>                           (ly:grob-property staff-symbol 'line-count)
>                           0)))
>           (display "\nNumber of staff lines: ")
>           (display line-count)
>           (ly:bar-line::print grob)))
>
> \layout {
>   \context {
>     \Staff
>     \override BarLine #'stencil = #test-bar-print
>   }
> }
>
> \new Staff {
>   s1 \bar ":|"
> }
>
> \new Staff {
>   \override Staff.StaffSymbol #'line-positions = #'(-2 0 2 4)
>   s1 \bar ":|"
> }

You don't appear to have explicitly changed the number of lines.  Use

 \override Staff.StaffSymbol #'line-count = #4

and the result is correct.

--
Phil Holmes