lily/pitch-squash-engraver.cc

   1 /*
   2   pitch-squash-grav.cc --  implement Pitch_squash_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2003 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9 #include "staff-symbol-referencer.hh"
  10 #include "note-head.hh"
  11 #include "rhythmic-head.hh"
  12 #include "engraver.hh"
  13
  14 class Pitch_squash_engraver : public Engraver {
  15 public:
  16   TRANSLATOR_DECLARATIONS(Pitch_squash_engraver);
  17   virtual void acknowledge_grob (Grob_info);
  18 };
  19
  20
  21 void
  22 Pitch_squash_engraver::acknowledge_grob (Grob_info i)
  23 {
  24   SCM newpos = get_property ("squashedPosition");
  25   if (Note_head::has_interface (i.grob_))
  26     {
  27       i.grob_->set_grob_property ("staff-position", newpos);
  28     }
  29 }
  30
  31
  32
  33 Pitch_squash_engraver::Pitch_squash_engraver()
  34 {
  35 }
  36
  37 ENTER_DESCRIPTION(Pitch_squash_engraver,
  38 /* descr */       "Treat all pitches as middle C.  Note that the notes move, but "
  39 "the locations of accidentals stay the same. "
  40 "Set the position field of all note heads to zero. This useful for "
  41 "making a single line staff that demonstrates the rhythm of a melody.",
  42 /* creats*/       "",
  43 /* accepts */     "",
  44 /* acks  */      "note-head-interface",
  45 /* reads */       "squashedPosition",
  46 /* write */       "");