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 TRANSLATOR_DECLARATIONS(Key_performer);
21 virtual bool try_music (Music* req_l);
22 virtual void create_audio_elements ();
23 virtual void stop_translation_timestep ();
26 Key_change_req* key_req_l_;
30 Key_performer::Key_performer ()
36 Key_performer::~Key_performer ()
41 Key_performer::create_audio_elements ()
45 SCM pitchlist = key_req_l_->get_mus_property ("pitch-alist");
46 SCM proc = scm_primitive_eval (ly_symbol2scm ("accidentals-in-key"));
47 SCM acc = gh_call1 (proc, pitchlist);
48 proc = scm_primitive_eval (ly_symbol2scm ("major-key"));
49 SCM major = gh_call1 (proc, pitchlist);
50 audio_p_ = new Audio_key (gh_scm2int (acc), major == SCM_BOOL_T);
51 Audio_element_info info (audio_p_, key_req_l_);
52 announce_element (info);
58 Key_performer::stop_translation_timestep ()
62 play_element (audio_p_);
68 Key_performer::try_music (Music* req_l)
70 if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
73 warning (_ ("FIXME: key change merge"));
82 ENTER_DESCRIPTION(Key_performer,"","","","","");