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--2004 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 (scm_is_number (newpos)
  26       && Note_head::has_interface (i.grob_))
  27     {
  28       i.grob_->set_property ("staff-position", newpos);
  29     }
  30 }
  31
  32
  33
  34 Pitch_squash_engraver::Pitch_squash_engraver ()
  35 {
  36 }
  37
  38 ENTER_DESCRIPTION (Pitch_squash_engraver,
  39 /* descr */
  40                   "Set the vertical position of noteheads to "
  41                   "@code{squashedPosition}, if that "
  42                   "property is set. "
  43                   "This can be used to make  a single line staff "
  44                   "demonstrating the rhythm of a melody.",
  45
  46 /* creats*/       "",
  47 /* accepts */     "",
  48 /* acks  */      "note-head-interface",
  49 /* reads */       "squashedPosition",
  50 /* write */       "");