X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fdrum-note-engraver.cc;h=16b089cb703cca7877766b9e16ed202929357fbb;hb=fe9cdeeaadee74b79eb4fb2f7a0d4f4322b35bca;hp=591fc9d1b6468445c3fa36d9f5ac8cf31c4cdb5d;hpb=82bc9ad690e201aaa55694f8b92261ae7338f56a;p=lilypond.git

diff --git a/lily/drum-note-engraver.cc b/lily/drum-note-engraver.cc
index 591fc9d1b6..16b089cb70 100644
--- a/lily/drum-note-engraver.cc
+++ b/lily/drum-note-engraver.cc
@@ -1,7 +1,7 @@
 /*
   This file is part of LilyPond, the GNU music typesetter.
 
-  Copyright (C) 1997--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
+  Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
 
   LilyPond is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -43,9 +43,9 @@ public:
 
 protected:
   void process_music ();
-  DECLARE_ACKNOWLEDGER (stem);
-  DECLARE_ACKNOWLEDGER (note_column);
-  DECLARE_TRANSLATOR_LISTENER (note);
+  void acknowledge_stem (Grob_info);
+  void acknowledge_note_column (Grob_info);
+  void listen_note (Stream_event *);
   void stop_translation_timestep ();
 };
 
@@ -53,7 +53,6 @@ Drum_notes_engraver::Drum_notes_engraver ()
 {
 }
 
-IMPLEMENT_TRANSLATOR_LISTENER (Drum_notes_engraver, note);
 void
 Drum_notes_engraver::listen_note (Stream_event *ev)
 {
@@ -76,7 +75,7 @@ Drum_notes_engraver::process_music ()
 
       SCM defn = SCM_EOL;
 
-      if (scm_hash_table_p (tab) == SCM_BOOL_T)
+      if (to_boolean (scm_hash_table_p (tab)))
         defn = scm_hashq_ref (tab, drum_type, SCM_EOL);
 
       if (scm_is_pair (defn))
@@ -85,7 +84,7 @@ Drum_notes_engraver::process_music ()
           SCM style = scm_car (defn);
           SCM script = scm_cadr (defn);
 
-          if (scm_integer_p (pos) == SCM_BOOL_T)
+          if (scm_is_integer (pos))
             note->set_property ("staff-position", pos);
           if (scm_is_symbol (style))
             note->set_property ("style", style);
@@ -140,8 +139,14 @@ Drum_notes_engraver::stop_translation_timestep ()
   events_.clear ();
 }
 
-ADD_ACKNOWLEDGER (Drum_notes_engraver, stem);
-ADD_ACKNOWLEDGER (Drum_notes_engraver, note_column);
+
+void
+Drum_notes_engraver::boot ()
+{
+  ADD_LISTENER (Drum_notes_engraver, note);
+  ADD_ACKNOWLEDGER (Drum_notes_engraver, stem);
+  ADD_ACKNOWLEDGER (Drum_notes_engraver, note_column);
+}
 
 ADD_TRANSLATOR (Drum_notes_engraver,
                 /* doc */