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--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8 #include "staff-symbol-referencer.hh"
   9 #include "note-head.hh"
  10 #include "rhythmic-head.hh"
  11 #include "engraver.hh"
  12
  13 class Pitch_squash_engraver : public Engraver
  14 {
  15 public:
  16   TRANSLATOR_DECLARATIONS (Pitch_squash_engraver);
  17   virtual void acknowledge_grob (Grob_info);
  18 };
  19
  20 void
  21 Pitch_squash_engraver::acknowledge_grob (Grob_info i)
  22 {
  23   SCM newpos = get_property ("squashedPosition");
  24   if (scm_is_number (newpos)
  25       && Note_head::has_interface (i.grob ()))
  26     {
  27       i.grob ()->set_property ("staff-position", newpos);
  28     }
  29 }
  30
  31 Pitch_squash_engraver::Pitch_squash_engraver ()
  32 {
  33 }
  34
  35 #include "translator.icc"
  36
  37 ADD_TRANSLATOR (Pitch_squash_engraver,
  38                 /* descr */
  39                 "Set the vertical position of noteheads to "
  40                 "@code{squashedPosition}, if that "
  41                 "property is set. "
  42                 "This can be used to make  a single line staff "
  43                 "demonstrating the rhythm of a melody.",
  44
  45                 /* creats*/ "",
  46                 /* accepts */ "",
  47                 /* acks  */ "note-head-interface",
  48                 /* reads */ "squashedPosition",
  49                 /* write */ "");