Dear Stefan,
here's a try, that has a parameter dir, which takes a symbol. If the symbol
equals 'above, the Staff is aligned above, else below:
--snip--
\version "2.14.2"
ossiastaff = #(define-music-function (parser location x dir y) ( string?
symbol? ly:music? )
(let ((align (if (eq? 'above dir) #{ \set Staff.alignAboveContext = $x #} #{
\set Staff.alignBelowContext = $x #})))
#{
\new Staff = "ossia" \with {
\override Clef #'stencil = ##f
\override KeySignature #'stencil = ##f
\override TimeSignature #'stencil = ##f
fontSize = #-3
\override StaffSymbol #'staff-space = #(magstep -3)
\override StaffSymbol #'thickness = #(magstep -3)
} { $align \override PianoStaff.SpanBar #'glyph-name = #":" $y }
#}
))
\score {
\new PianoStaff <<
\new Staff="mainstaff" \relative c'' { \time 3/4 \key g \major
d4 g,8 a b c d4 g, g
<< { e'4 c8 \mordent d e fis g4 g, g } { \ossiastaff "mainstaff"
#'above { s4 c32[ b c16.] s4 s4 } } >>
}
>>
}
\score {
\new PianoStaff <<
\new Staff="mainstaff" \relative c'' { \time 3/4 \key g \major
d4 g,8 a b c d4 g, g
<< { e'4 c8 \mordent d e fis g4 g, g } { \ossiastaff "mainstaff"
#'below { s4 c32[ b c16.] s4 s4 } } >>
}
>>
}
--snip--
If you want to use strings "above" and "below", you have to compare them with
string=?
HTH
Cheers, Jan-Peter
Am 22.04.2012 um 20:27 schrieb Stefan Thomas:
> Dear community,
> I've written some scheme-code for making it easier to create ossia-staffs.
> The syntax for the code I've created is \ossiastaff "staffname" { music}
> It works fine but now it works only for ossia-staffs above. I would prefer a
> syntax like
> \ossiastaff "staffname" "above" (or below) { music}
> Here is my code:
>
>
> \version "2.14.2"
> ossiastaff = #(define-music-function (parser location x y) ( string?
> ly:music? )
> #{
> \new Staff = "ossia" \with {
> alignAboveContext = $x
> \override Clef #'stencil = ##f
> \override KeySignature #'stencil = ##f
> \override TimeSignature #'stencil = ##f
> fontSize = #-3
> \override StaffSymbol #'staff-space = #(magstep -3)
> \override StaffSymbol #'thickness = #(magstep -3)
> } { \override PianoStaff.SpanBar #'glyph-name = #":" $y }
> #})
>
> mainthing = \relative c'' { \time 3/4 \key g \major
> d4 g,8 a b c d4 g, g
> << { e'4 c8 \mordent d e fis g4 g, g } { \ossiastaff "mainstaff" {
>
> s4 c32[ b c16.] s4 s4 } } >>
>
> }
>
> \score {
> \new PianoStaff <<
> \new Staff="mainstaff" \mainthing
>
> >>
> }
>
>
>
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