(c) 1997--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
+#include "item.hh"
#include "bar-line.hh"
-#include "clef.hh"
+#include "staff-symbol-referencer.hh"
#include "context.hh"
#include "engraver.hh"
-#include "item.hh"
-#include "pitch.hh"
#include "protected-scm.hh"
-#include "staff-symbol-referencer.hh"
-#include "stream-event.hh"
+#include "clef.hh"
+#include "pitch.hh"
#include "translator.icc"
class Key_engraver : public Engraver
{
void create_key (bool);
- void read_event (Stream_event const *r);
+ void read_event (Music const *r);
- Stream_event *key_event_;
+ Music *key_event_;
Item *item_;
Item *cancellation_;
public:
protected:
virtual void initialize ();
virtual void finalize ();
+ virtual bool try_music (Music *event);
void stop_translation_timestep ();
void process_music ();
- DECLARE_TRANSLATOR_LISTENER (key_change);
DECLARE_ACKNOWLEDGER (clef);
DECLARE_ACKNOWLEDGER (bar_line);
};
}
}
-IMPLEMENT_TRANSLATOR_LISTENER (Key_engraver, key_change);
-void
-Key_engraver::listen_key_change (Stream_event *ev)
+bool
+Key_engraver::try_music (Music *event)
{
- /* do this only once, just to be on the safe side. */
- if (ASSIGN_EVENT_ONCE (key_event_, ev))
- read_event (key_event_);
+ if (event->is_mus_type ("key-change-event"))
+ {
+ /* do this only once, just to be on the safe side. */
+ if (!key_event_)
+ {
+ key_event_ = event;
+ read_event (key_event_);
+ }
+ return true;
+ }
+ return false;
}
void
}
void
-Key_engraver::read_event (Stream_event const *r)
+Key_engraver::read_event (Music const *r)
{
SCM p = r->get_property ("pitch-alist");
if (!scm_is_pair (p))