2 key-performer.cc -- implement Key_performer
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2002 Jan Nieuwenhuizen <janneke@gnu.org>
9 #include "lily-guile.hh"
10 #include "command-request.hh"
11 #include "audio-item.hh"
12 #include "performer.hh"
15 class Key_performer : public Performer
18 TRANSLATOR_DECLARATIONS(Key_performer);
22 virtual bool try_music (Music* req_l);
23 virtual void create_audio_elements ();
24 virtual void stop_translation_timestep ();
27 Key_change_req* key_req_l_;
31 Key_performer::Key_performer ()
37 Key_performer::~Key_performer ()
42 Key_performer::create_audio_elements ()
46 SCM pitchlist = key_req_l_->get_mus_property ("pitch-alist");
47 SCM proc = scm_primitive_eval (ly_symbol2scm ("accidentals-in-key"));
48 SCM acc = gh_call1 (proc, pitchlist);
49 proc = scm_primitive_eval (ly_symbol2scm ("major-key"));
52 gh_scm2int (ly_caar (pitchlist)),
53 gh_scm2int (ly_cdar (pitchlist)));
56 (7 - gh_scm2int (ly_caar (pitchlist))) % 7,
57 -gh_scm2int (ly_cdar (pitchlist)));
59 my_do.transpose (to_c);
60 to_c.alteration_i_ -= my_do.alteration_i_;
62 Key_change_req *key = new Key_change_req;
63 key->set_mus_property ("pitch-alist", scm_list_copy (pitchlist));
64 ((Music*)key)->transpose (to_c);
65 SCM c_pitchlist = key->get_mus_property ("pitch-alist");
66 SCM major = gh_call1 (proc, c_pitchlist);
68 audio_p_ = new Audio_key (gh_scm2int (acc), major == SCM_BOOL_T);
69 Audio_element_info info (audio_p_, key_req_l_);
70 announce_element (info);
76 Key_performer::stop_translation_timestep ()
80 play_element (audio_p_);
86 Key_performer::try_music (Music* req_l)
88 if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
91 warning (_ ("FIXME: key change merge"));
100 ENTER_DESCRIPTION(Key_performer,"","","","","");