X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fkey-performer.cc;h=c2fc6346cc4909b639d26f01addad75cb341bad2;hb=63179d1f16581b4993455c726cab4873c7f0dbc0;hp=9443d33eff0cf2d580cd36a7d413a9bd6c227a63;hpb=e837c7556a0a39cbb7a6d948ffa7101d22df1f33;p=lilypond.git

diff --git a/lily/key-performer.cc b/lily/key-performer.cc
index 9443d33eff..c2fc6346cc 100644
--- a/lily/key-performer.cc
+++ b/lily/key-performer.cc
@@ -3,14 +3,17 @@
 
   source file of the GNU LilyPond music typesetter
 
-  (c) 1997--2005 Jan Nieuwenhuizen <janneke@gnu.org>
+  (c) 1997--2006 Jan Nieuwenhuizen <janneke@gnu.org>
 */
 
-#include "music-sequence.hh"
 #include "audio-item.hh"
+#include "music-sequence.hh"
 #include "performer.hh"
+#include "stream-event.hh"
 #include "warn.hh"
 
+#include "translator.icc"
+
 class Key_performer : public Performer
 {
 public:
@@ -18,12 +21,12 @@ public:
   ~Key_performer ();
 
 protected:
-  virtual bool try_music (Music *ev);
-  virtual void create_audio_elements ();
-  virtual void stop_translation_timestep ();
+  void process_music ();
+  void stop_translation_timestep ();
 
+  DECLARE_TRANSLATOR_LISTENER (key_change);
 private:
-  Event *key_ev_;
+  Stream_event *key_ev_;
   Audio_key *audio_;
 };
 
@@ -38,7 +41,7 @@ Key_performer::~Key_performer ()
 }
 
 void
-Key_performer::create_audio_elements ()
+Key_performer::process_music ()
 {
   if (key_ev_)
     {
@@ -65,10 +68,10 @@ Key_performer::create_audio_elements ()
       bool minor = (scm_is_pair (third)
 		    && scm_is_integer (scm_cdr (third))
 		    && scm_to_int (scm_cdr (third)) == FLAT);
-      
+
       audio_ = new Audio_key (scm_to_int (acc),
 			      !minor);
-		    
+
       Audio_element_info info (audio_, key_ev_);
       announce_element (info);
       key_ev_ = 0;
@@ -85,23 +88,15 @@ Key_performer::stop_translation_timestep ()
     }
 }
 
-bool
-Key_performer::try_music (Music *ev)
+IMPLEMENT_TRANSLATOR_LISTENER (Key_performer, key_change);
+void
+Key_performer::listen_key_change (Stream_event *ev)
 {
-  if (Event *kc = dynamic_cast<Event *> (ev))
-    {
-      if (!key_ev_)
-	{
-	  key_ev_ = kc;
-	}
-      
-      return true;
-    }
-
-  return false;
+  if (!key_ev_)
+    key_ev_ = ev;
 }
 
 ADD_TRANSLATOR (Key_performer,
 		"", "",
 		"key-change-event",
-		"", "", "");
+		"", "");