* lily/include/grob-info.hh (class Grob_info): make data member

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

diff --git a/lily/pitch-squash-engraver.cc b/lily/pitch-squash-engraver.cc
index a3ce1a071958efa4edfc89d6689474ed9860cd86..870a5a93154ba82ddc0db33b087af1feae9b18a7 100644 (file)
--- a/lily/pitch-squash-engraver.cc
+++ b/lily/pitch-squash-engraver.cc
@@ -1,25 +1,47 @@
-/*   
-  pitch-squash-grav.cc --  implement Pitch_squash_engraver
-  
+/*
+  pitch-squash-engraver.cc -- implement Pitch_squash_engraver
+
   source file of the GNU LilyPond music typesetter
-  
-  (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-  
- */
 
+  (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+*/
 #include "staff-symbol-referencer.hh"
-#include "pitch-squash-engraver.hh"
 #include "note-head.hh"
+#include "rhythmic-head.hh"
+#include "engraver.hh"
 
-ADD_THIS_TRANSLATOR (Pitch_squash_engraver);
+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 (Note_head *nh = dynamic_cast<Note_head *> (i.elem_l_))
+  SCM newpos = get_property ("squashedPosition");
+  if (scm_is_number (newpos)
+      && Note_head::has_interface (i.grob ()))
     {
-      Staff_symbol_referencer_interface (nh).set_position(0);
+      i.grob ()->set_property ("staff-position", newpos);
     }
 }
 
+Pitch_squash_engraver::Pitch_squash_engraver ()
+{
+}
+
+ADD_TRANSLATOR (Pitch_squash_engraver,
+               /* descr */
+               "Set the vertical position of noteheads to "
+               "@code{squashedPosition}, if that "
+               "property is set. "
+               "This can be used to make  a single line staff "
+               "demonstrating the rhythm of a melody.",
 
+               /* creats*/ "",
+               /* accepts */ "",
+               /* acks  */ "note-head-interface",
+               /* reads */ "squashedPosition",
+               /* write */ "");