Is it possible to tweak clef properties in the same way that you can tweak
color and notehead style of a ly:pitch? Object.
Ie
;rebuild the pitch and if a changed pitch add the color tweak
(if (ly:pitch? p)
(let ((new-pitch (naturalize-instrument-range p instrument)))
(ly:music-set-property! music 'pitch new-pitch)
(if (and (not (equal? p new-pitch)) (color? my-color))
(ly:music-set-property! music 'tweaks
(acons 'color my-color
(acons 'style 'harmonic-mixed
(ly:music-property music 'tweaks)))))))
The clef properties I am trying to tweak are indicated by .data but items in
an 'elements structure are harder to get hold of. Am I wasting my time
trying?
The reason for trying is that for a lot of the time I transpose various
quartets including bassoon, cello etc for a bass clarinet and or alto flute.
It would be nice to be able to change the clef at the same time as
transposing.
I often forget one or other and it is easier to input data in the original
clef for checking input.
Having started down this road it has become a challenge...Any help for a
ageing muso who has forgotten almost all the scheme/lily learnt last year
very gratefully received.
'RelativeOctaveMusic
(make-music
'SequentialMusic
'elements
(list (make-music
'ContextSpeccedMusic
'context-type
'Staff
'element
(make-music
'SequentialMusic
'elements
(list (make-music
'PropertySet
'value
"clefs.G" .data
'symbol
'clefGlyph)
(make-music
'PropertySet
'value
-6 .data
'symbol
'middleCClefPosition)
(make-music
'PropertySet
'value
-2 .data
'symbol
'clefPosition)
(make-music
'PropertySet
'value
0 .data
'symbol
'clefTransposition)
(make-music
'PropertySet
'value
'default .data
'symbol
'clefTranspositionStyle)
(make-music
'ApplyContext
'procedure
ly:set-middle-C!))))
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