lily/pitch-squash-engraver.cc

   1 /*
   2   pitch-squash-engraver.cc -- implement Pitch_squash_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7 */
   8
   9 #include "engraver.hh"
  10
  11 #include "staff-symbol-referencer.hh"
  12 #include "note-head.hh"
  13 #include "rhythmic-head.hh"
  14 #include "grob.hh"
  15
  16 class Pitch_squash_engraver : public Engraver
  17 {
  18 public:
  19   TRANSLATOR_DECLARATIONS (Pitch_squash_engraver);
  20   DECLARE_ACKNOWLEDGER (note_head);
  21 };
  22
  23 void
  24 Pitch_squash_engraver::acknowledge_note_head (Grob_info i)
  25 {
  26   SCM newpos = get_property ("squashedPosition");
  27   if (scm_is_number (newpos))
  28     i.grob ()->set_property ("staff-position", newpos);
  29 }
  30
  31 Pitch_squash_engraver::Pitch_squash_engraver ()
  32 {
  33 }
  34
  35 #include "translator.icc"
  36 ADD_ACKNOWLEDGER (Pitch_squash_engraver, note_head);
  37 ADD_TRANSLATOR (Pitch_squash_engraver,
  38                 /* doc */
  39                 "Set the vertical position of note heads to"
  40                 " @code{squashedPosition}, if that property is set.  This can"
  41                 " be used to make a single-line staff demonstrating the"
  42                 " rhythm of a melody.",
  43
  44                 /* create */
  45                 "",
  46
  47                 /* read */
  48                 "squashedPosition ",
  49
  50                 /* write */
  51                 ""
  52                 );