(stop_translation_timestep): don't

[lilypond.git] / lily / tempo-performer.cc

diff --git a/lily/tempo-performer.cc b/lily/tempo-performer.cc
index 58310da1dc69ca5eb2c484f7e98529fa19602bee..e21f617b60f94a5e27e48152452a5a5fdafebae3 100644 (file)
--- a/lily/tempo-performer.cc
+++ b/lily/tempo-performer.cc
@@ -3,14 +3,16 @@
 
   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 "performer.hh"
 
 #include "audio-item.hh"
-#include "music.hh"
 #include "duration.hh"
+#include "stream-event.hh"
+
+#include "translator.icc"
 
 class Tempo_performer : public Performer
 {
@@ -20,18 +22,17 @@ public:
 
 protected:
 
-  virtual bool try_music (Music *req);
-  virtual void stop_translation_timestep ();
-  virtual void create_audio_elements ();
-
+  void stop_translation_timestep ();
+  void process_music ();
+  DECLARE_TRANSLATOR_LISTENER (metronome_change);
 private:
-  Music *tempo_req_;
+  Stream_event *tempo_event_;
   Audio_tempo *audio_;
 };
 
 Tempo_performer::Tempo_performer ()
 {
-  tempo_req_ = 0;
+  tempo_event_ = 0;
   audio_ = 0;
 }
 
@@ -40,20 +41,20 @@ Tempo_performer::~Tempo_performer ()
 }
 
 void
-Tempo_performer::create_audio_elements ()
+Tempo_performer::process_music ()
 {
-  if (tempo_req_)
+  if (tempo_event_)
     {
-      SCM met = tempo_req_->get_property ("metronome-count");
-      Duration *d = unsmob_duration (tempo_req_->get_property ("tempo-unit"));
+      SCM met = tempo_event_->get_property ("metronome-count");
+      Duration *d = unsmob_duration (tempo_event_->get_property ("tempo-unit"));
 
       Rational r = (d->get_length () / Moment (Rational (1, 4)) * Moment (scm_to_int (met))).main_part_;
 
-      audio_ = new Audio_tempo (int (r));
+      audio_ = new Audio_tempo (r.to_int ());
 
-      Audio_element_info info (audio_, tempo_req_);
+      Audio_element_info info (audio_, tempo_event_);
       announce_element (info);
-      tempo_req_ = 0;
+      tempo_event_ = 0;
     }
 }
 
@@ -67,16 +68,13 @@ Tempo_performer::stop_translation_timestep ()
     }
 }
 
-bool
-Tempo_performer::try_music (Music *req)
+IMPLEMENT_TRANSLATOR_LISTENER (Tempo_performer, metronome_change);
+void
+Tempo_performer::listen_metronome_change (Stream_event *event)
 {
-  if (tempo_req_)
-    return false;
-
-  tempo_req_ = req;
-  return true;
+  tempo_event_ = event;
 }
 
 ADD_TRANSLATOR (Tempo_performer, "", "",
                "metronome-change-event",
-               "", "", "");
+               "", "");