Documentation/snippets/numbers-as-easy-note-heads.ly

   1 % Do not edit this file; it is automatically
   2 % generated from Documentation/snippets/new
   3 % This file is in the public domain.
   4 %% Note: this file works from version 2.13.11
   5 \version "2.13.11"
   6
   7 \header {
   8   lsrtags = "pitches"
   9   texidoc = "
  10 Easy notation note heads use the @code{note-names} property
  11 of the @code{NoteHead} object to determine what appears inside
  12 the note head.  By overriding this property, it is possible
  13 to print numbers representing the scale-degree.
  14
  15 A simple engraver can be created to do this for every note head
  16 object it sees.
  17 "
  18   doctitle = "Numbers as easy note heads"
  19 } % begin verbatim
  20
  21
  22 #(define Ez_numbers_engraver (list
  23   (cons 'acknowledgers
  24    (list
  25      (cons 'note-head-interface
  26        (lambda (engraver grob source-engraver)
  27          (let* (
  28            (context (ly:translator-context engraver))
  29            (tonic-pitch (ly:context-property context 'tonic))
  30            (tonic-name (ly:pitch-notename tonic-pitch))
  31            (grob-pitch (ly:event-property (event-cause grob) 'pitch))
  32            (grob-name (ly:pitch-notename grob-pitch))
  33            (delta (modulo (- grob-name tonic-name) 7))
  34            (note-names (make-vector 7 (number->string (+ 1 delta)))))
  35         (ly:grob-set-property! grob 'note-names note-names))))))))
  36
  37 #(set-global-staff-size 26)
  38
  39 \layout {
  40   ragged-right = ##t
  41   \context {
  42     \Voice
  43     \consists \Ez_numbers_engraver
  44   }
  45 }
  46
  47 \relative c' {
  48   \easyHeadsOn
  49   c4 d e f
  50   g4 a b c \break
  51
  52   \key a \major
  53   a,4 b cis d
  54   e4 fis gis a \break
  55
  56   \key d \dorian
  57   d,4 e f g
  58   a4 b c d
  59 }