Ernie,
I'll point it out below.
On Tue, Jul 14, 2020 at 10:42 AM Ernie Braganza <ernie.braga...@gmail.com>
wrote:
> I am not sure where to place this new engraver code so I can use it. I
> tried researching this in the manual, but was still unclear. Where should
> it appear? Again, thanks for your help
>
> On Mon, Jul 13, 2020 at 8:15 PM Thomas Morley <thomasmorle...@gmail.com>
> wrote:
>
>>
>> Here an engraver which transforms the default stencil to an empty
>> stencil under certain conditions (it's not a rewrite of
>> Chord_name_engraver)
>>
>> Right here is a new ChordNames context that has everything you need. Put
the whole context into your file, replacing the current ChordNames
context.
> \new ChordNames
>> \with {
>> chordChanges = ##t
>> \consists
>> #(lambda (ctx)
>> (let* ((chord #f)
>> (last-chord #f))
>>
>> (define (at-line-beginning? grob)
>> (let* ((col (ly:item-get-column grob))
>> (ln (ly:grob-object col 'left-neighbor))
>> (col-to-check (if (ly:grob? ln) ln col)))
>> (and (eq? #t (ly:grob-property col-to-check 'non-musical))
>> (= 1 (ly:item-break-dir col-to-check)))))
>>
>> (make-engraver
>> (acknowledgers
>> ((chord-name-interface this-engraver grob source-engraver)
>>
>> (if chord
>> (begin
>> (set! last-chord chord)
>> (set! chord #f)))
>>
>> (set! chord (ly:grob-property grob 'text))
>>
>> ;; If two subsequent chords are equal and chordChanges is
>> enabled,
>> ;; set 'after-line-breaking to a procedure which sets the
>> stencil
>> ;; to an empty-stencil if the new chord is at line-start.
>> (if (and (equal? chord last-chord)
>> (ly:context-property ctx 'chordChanges #f))
>> (ly:grob-set-property! grob 'after-line-breaking
>> (lambda (grob)
>> (if (at-line-beginning? grob)
>> (ly:grob-set-property! grob 'stencil
>> empty-stencil))
>> ;; keep default
>> (ly:chord-name::after-line-breaking grob))))))
>> ((finalize this-engraver)
>> ;; house keeping
>> (set! chord #f)
>> (set! last-chord #f)))))
>> }
>>
> This is the end of the ChordNames context
> \chordmode { d2 c~ \break c d }
>>
>> The chormode code is then placed in the ChordNames context. You may wish
to surround it with{}, although it is not necessary here because the
\chordmode {} is a single music expresion.
HTH,
Carl
