Re: Layout of a (piano) hand indicator

[Thomas Morley]

2018-05-07 20:25 GMT+02:00 foxfanfare <address@hidden>:
> I just played a little with the complex snippet of Harm and it worked like a
> charm!
> You definitely should put this code in the snippets directory!
>
>
> Thomas Morley-2 wrote
>>   %% FingeringColumn present, because two or more fingerings present and
>>   %% `fingeringOrientations' is `left'
>>   %%
>>   %% need to manually adjust Fingerings, but sometimes FingeringColumn
>> still
>>   %% delivers surprises ...
>
> I didn't understand where was the problem actually?
>
> I take the opportunity to ask a question about this FingeringColumn
> interface which I don't understand. I tried to shorter the distance between
> fingerings when they are in column but without succes.
>
> I can get it worked with: "\override Fingering.padding = #0" but this will
> then concern all the fingerings in the score (of course I can use \once but
> I will need to make that every time this occurs).
>
> The documentation mentioned a padding parameter for the
> fingering-column-interface wich seems interesting in this case, but nothing
> happen when I use this! What did I miss?
>
> Exemple:
> \version "2.19.81"
>
> \relative {
>   \textLengthOn
>   \set fingeringOrientations = #'()
>   <c'-1e-2g-3>1^"normal"
>   \once \override Fingering.padding = #0
>   <c-1e-2g-3>^"OK but will affect every fingers"
>   \once \override FingeringColumn.padding = #0
>   <c-1e-2g-3>^"doesn't work?"
> }



Hi,

FingeringColumn is not easy to deal with and not really over-documented ...

FingeringColumn is only created if necassary at Staff-level.
Condition: fingeringOrientations contains left or right _and_ more
than one in-chord fingering is present.
So none of your examples create a FingeringColumn.

Also, see:

%% If FingeringColumn present, print.
printIfFC =
  \override Staff.FingeringColumn.after-line-breaking =
  #(lambda (grob) (format #t "\ngrob there? ~a" grob))

%% no FingeringColumn
\relative c' {
  \printIfFC
  \set fingeringOrientations = #'(down)
  <c-1 e-2 g-3>1
  \set fingeringOrientations = #'(up)
  <c-1 e-2 g-3>1
}

%% no FingeringColumn
\relative c' {
  \printIfFC
  \set fingeringOrientations = #'(left)
  <c'-1 e g>1
  <c-1 e g>1-2-3
  \set fingeringOrientations = #'(right)
  <c-1 e g>1
  <c-1 e g>1-2-3
}

%% FingeringColumn present because `fingeringOrientations' is 'left or 'right
%% _and_ more than one in-chord fingering is present
\relative c' {
  \printIfFC
  \set fingeringOrientations = #'(left)
  <c'-1 e-2 g>1
  <c-1 e-2 g>1-2-3
  \set fingeringOrientations = #'(right)
  <c-1 e-2 g>1
  <c-1 e-2 g>1-2-3
}

%% FingeringColumn.padding
\relative c' {
  \printIfFC
  \set fingeringOrientations = #'(left)
  <c'-1 e-2 g>1
  \override Staff.FingeringColumn.padding = 5
  <c-1 e-2 g>1
}

Btw, don't do \set fingeringOrientations = #'(), it creates a warning:
"no placement found for fingerings". Default is '(up down).
See:

%% Default fingeringOrientations are defined in Score-context.
%% Display them with:
printFingeringOrientations =
\context Score
\applyContext
#(lambda (ctx)
  (format
    #t
    "\nIn ~a fingeringOrientations: ~a\n\tor look into engraver-init.ly"
    ctx
    (ly:context-property ctx 'fingeringOrientations)))

{
  \printFingeringOrientations
  R1
}

For default-`fingeringOrientations the fingerings are accumulated in
ScriptColumn together with other stuff.
See:

\relative {
  \once \override ScriptColumn.after-line-breaking =
  #(lambda (grob)
    (let* ((scripts-array (ly:grob-object grob 'scripts))
           (scripts
             ;; the check is probably not needed, better be paranoid, though
             (if (ly:grob-array? scripts-array)
                 (ly:grob-array->list scripts-array)
                 '())))
    (format #t "\nScriptColumn.scripts:\n~y" scripts)))
  <c-1\1-\rightHandFinger #0 e-2 g-3>
  %% demonstrate tweaking padding
  <c-1 e-2 g-\tweak padding 4 -3>
}

HTH a bit,
  Harm