2 key-performer.cc -- implement Key_performer
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "lily-guile.hh"
10 #include "command-request.hh"
11 #include "audio-item.hh"
12 #include "performer.hh"
14 class Key_performer : public Performer
17 VIRTUAL_COPY_CONS(Translator);
23 virtual bool try_music (Music* req_l);
24 virtual void create_audio_elements ();
25 virtual void stop_translation_timestep ();
28 Key_change_req* key_req_l_;
32 ADD_THIS_TRANSLATOR (Key_performer);
34 Key_performer::Key_performer ()
40 Key_performer::~Key_performer ()
45 Key_performer::create_audio_elements ()
49 SCM pitchlist = key_req_l_->get_mus_property ("pitch-alist");
50 SCM proc = scm_eval2 (ly_symbol2scm ("accidentals-in-key"), SCM_EOL);
51 SCM acc = gh_call1 (proc, pitchlist);
52 proc = scm_eval2 (ly_symbol2scm ("major-key"), SCM_EOL);
53 SCM major = gh_call1 (proc, pitchlist);
54 audio_p_ = new Audio_key (gh_scm2int(acc), major == SCM_BOOL_T);
55 Audio_element_info info (audio_p_, key_req_l_);
56 announce_element (info);
62 Key_performer::stop_translation_timestep ()
66 play_element (audio_p_);
72 Key_performer::try_music (Music* req_l)
74 if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
77 warning (_ ("FIXME: key change merge"));