X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=Documentation%2Fsnippets%2Fnew%2Fnumbers-as-easy-note-heads.ly;fp=Documentation%2Fsnippets%2Fnew%2Fnumbers-as-easy-note-heads.ly;h=03e0578af27e012b19d97a9fa3ef3036eca76bd1;hb=941dff9d2a67080e0dd8474f1e70f0c72ace6424;hp=0000000000000000000000000000000000000000;hpb=5a22d6233a39d3164e1ca043244794c268be4ad0;p=lilypond.git

diff --git a/Documentation/snippets/new/numbers-as-easy-note-heads.ly b/Documentation/snippets/new/numbers-as-easy-note-heads.ly
new file mode 100644
index 0000000000..03e0578af2
--- /dev/null
+++ b/Documentation/snippets/new/numbers-as-easy-note-heads.ly
@@ -0,0 +1,56 @@
+\version "2.14.0"
+
+\header {
+  lsrtags = "pitches"
+  texidoc = "
+Easy notation note heads use the @code{note-names} property
+of the @code{NoteHead} object to determine what appears inside
+the note head.  By overriding this property, it is possible
+to print numbers representing the scale-degree.
+
+A simple engraver can be created to do this for every note head
+object it sees.
+"
+  doctitle = "Numbers as easy note heads"
+}
+
+#(define Ez_numbers_engraver
+   (list
+    (cons 'acknowledgers
+          (list
+           (cons 'note-head-interface
+                 (lambda (engraver grob source-engraver)
+                   (let* ((context (ly:translator-context engraver))
+                          (tonic-pitch (ly:context-property context 'tonic))
+                          (tonic-name (ly:pitch-notename tonic-pitch))
+                          (grob-pitch
+                           (ly:event-property (event-cause grob) 'pitch))
+                          (grob-name (ly:pitch-notename grob-pitch))
+                          (delta (modulo (- grob-name tonic-name) 7))
+                          (note-names
+                           (make-vector 7 (number->string (1+ delta)))))
+                     (ly:grob-set-property! grob 'note-names note-names))))))))
+
+#(set-global-staff-size 26)
+
+\layout {
+  ragged-right = ##t
+  \context {
+    \Voice
+    \consists \Ez_numbers_engraver
+  }
+}
+
+\relative c' {
+  \easyHeadsOn
+  c4 d e f
+  g4 a b c \break
+
+  \key a \major
+  a,4 b cis d
+  e4 fis gis a \break
+
+  \key d \dorian
+  d,4 e f g
+  a4 b c d
+}