/*
- time_signature-performer.cc -- implement Time_signature_performer
+ time-signature-performer.cc -- implement Time_signature_performer
source file of the GNU LilyPond music typesetter
- (c) 1997--1998 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1997--2002 Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "time-signature-performer.hh"
-#include "command-request.hh"
#include "audio-item.hh"
+#include "lily-proto.hh"
+#include "performer.hh"
-ADD_THIS_TRANSLATOR(Time_signature_performer);
-
-Time_signature_performer::Time_signature_performer()
+class Time_signature_performer : public Performer
{
- time_signature_req_l_ = 0;
-}
+public:
+ TRANSLATOR_DECLARATIONS(Time_signature_performer);
+ ~Time_signature_performer ();
+
+protected:
+
+ virtual void stop_translation_timestep ();
+ virtual void create_audio_elements ();
+
+ SCM prev_fraction_;
+private:
+
+ Audio_time_signature* audio_p_;
+};
+
-Time_signature_performer::~Time_signature_performer()
+Time_signature_performer::Time_signature_performer ()
{
+ prev_fraction_ = SCM_BOOL_F;
+ audio_p_ = 0;
}
-void
-Time_signature_performer::do_print() const
+Time_signature_performer::~Time_signature_performer ()
{
-#ifndef NPRINT
- if (time_signature_req_l_)
- time_signature_req_l_->print();
-#endif
}
+
void
-Time_signature_performer::do_process_requests()
+Time_signature_performer::create_audio_elements ()
{
- if (time_signature_req_l_)
- play (new Audio_time_signature (time_signature_req_l_));
- time_signature_req_l_ = 0;
+ SCM fr = get_property ("timeSignatureFraction");
+ if (gh_pair_p (fr) && !gh_equal_p (fr, prev_fraction_))
+ {
+ prev_fraction_ = fr;
+ int b = gh_scm2int (ly_car (fr));
+ int o = gh_scm2int (ly_cdr (fr));
+
+ audio_p_ = new Audio_time_signature (b,o);
+ Audio_element_info info (audio_p_, 0);
+ announce_element (info);
+
+ }
}
-bool
-Time_signature_performer::do_try_music (Music* req_l)
+void
+Time_signature_performer::stop_translation_timestep ()
{
- if (time_signature_req_l_)
- return false;
-
- if (dynamic_cast <Command_req *> (req_l))
- time_signature_req_l_ = dynamic_cast <Time_signature_change_req *> (req_l);
-
- if (time_signature_req_l_)
- return true;
-
- return false;
+ if (audio_p_)
+ {
+ play_element (audio_p_);
+ audio_p_ = 0;
+ }
}
+ENTER_DESCRIPTION (Time_signature_performer, "","","","","" );