2003 -> 2004

[lilypond.git] / lily / pitch-squash-engraver.cc

diff --git a/lily/pitch-squash-engraver.cc b/lily/pitch-squash-engraver.cc
index 4851cee02cfdbd1faa72b28f081e62e4174b90e8..ef5f33580393c8bc81abb9382daf46d09cd4c598 100644 (file)
--- a/lily/pitch-squash-engraver.cc
+++ b/lily/pitch-squash-engraver.cc
@@ -3,23 +3,45 @@
   
   source file of the GNU LilyPond music typesetter
   
-  (c)  1997--1998 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+  (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   
  */
-
-#include "pitch-squash-engraver.hh"
+#include "staff-symbol-referencer.hh"
 #include "note-head.hh"
+#include "rhythmic-head.hh"
+#include "engraver.hh"
+
+class Pitch_squash_engraver : public Engraver {
+public:
+  TRANSLATOR_DECLARATIONS(Pitch_squash_engraver);
+  virtual void acknowledge_grob (Grob_info);
+};
+
 
 void
-Pitch_squash_engraver::acknowledge_element (Score_element_info i)
+Pitch_squash_engraver::acknowledge_grob (Grob_info i)
 {
-  if (i.elem_l_->is_type_b (Note_head::static_name ()))
+  SCM newpos = get_property ("squashedPosition");
+  if (gh_number_p (newpos)
+      && Note_head::has_interface (i.grob_))
     {
-      Note_head * nl = (Note_head*)dynamic_cast <Item *> (i.elem_l_);
-      nl->position_i_  =0;
+      i.grob_->set_grob_property ("staff-position", newpos);
     }
 }
 
-ADD_THIS_TRANSLATOR (Pitch_squash_engraver);
-IMPLEMENT_IS_TYPE_B1(Pitch_squash_engraver, Engraver);
 
+
+Pitch_squash_engraver::Pitch_squash_engraver()
+{
+}
+
+ENTER_DESCRIPTION(Pitch_squash_engraver,
+/* descr */       "Treat all pitches as middle C.  Note that the notes move, but "
+"the locations of accidentals stay the same. "
+"Set the position field of all note heads to zero. This useful for "
+"making a single line staff that demonstrates the rhythm of a melody.",
+/* creats*/       "",
+/* accepts */     "",
+/* acks  */      "note-head-interface",
+/* reads */       "squashedPosition",
+/* write */       "");