source file of the GNU LilyPond music typesetter
- (c) 1997--2000 Jan Nieuwenhuizen <janneke@gnu.org>
+ (c) 1997--2004 Jan Nieuwenhuizen <janneke@gnu.org>
*/
-#include "key-performer.hh"
-#include "command-request.hh"
+#include "lily-guile.hh"
+
#include "audio-item.hh"
+#include "performer.hh"
+#include "warn.hh"
+class Key_performer : public Performer
+{
+public:
+ TRANSLATOR_DECLARATIONS(Key_performer);
+ ~Key_performer ();
+protected:
+ virtual bool try_music (Music* req);
+ virtual void create_audio_elements ();
+ virtual void stop_translation_timestep ();
-ADD_THIS_TRANSLATOR (Key_performer);
+private:
+ Key_change_ev* key_req_;
+ Audio_key* audio_;
+};
Key_performer::Key_performer ()
{
- key_req_l_ = 0;
- audio_p_ = 0;
+ key_req_ = 0;
+ audio_ = 0;
}
Key_performer::~Key_performer ()
{
}
-void
-Key_performer::do_print () const
-{
-#ifndef NPRINT
- if (key_req_l_)
- key_req_l_->print ();
-#endif
-}
-
void
-Key_performer::do_process_music ()
+Key_performer::create_audio_elements ()
{
- if (key_req_l_)
+ if (key_req_)
{
- audio_p_ = new Audio_key (key_req_l_->key_);
- Audio_element_info info (audio_p_, key_req_l_);
+ SCM pitchlist = key_req_->get_mus_property ("pitch-alist");
+ SCM proc = scm_primitive_eval (ly_symbol2scm ("accidentals-in-key"));
+ SCM acc = gh_call1 (proc, pitchlist);
+
+ Pitch key_do (0,
+ gh_scm2int (ly_caar (pitchlist)),
+ gh_scm2int (ly_cdar (pitchlist)));
+
+ Pitch c_do (0, 0, 0);
+
+ SCM c_pitchlist
+ = ly_transpose_key_alist (pitchlist,
+ interval (key_do, c_do).smobbed_copy ());
+
+ /* MIDI keys are too limited for lilypond scales.
+ We check for minor scale and assume major otherwise. */
+ SCM minor = scm_primitive_eval (ly_symbol2scm ("minor"));
+ audio_ = new Audio_key (gh_scm2int (acc),
+ SCM_BOOL_T != scm_equal_p (minor, c_pitchlist));
+
+ Audio_element_info info (audio_, key_req_);
announce_element (info);
- key_req_l_ = 0;
+ key_req_ = 0;
}
}
void
-Key_performer::do_pre_move_processing ()
+Key_performer::stop_translation_timestep ()
{
- if (audio_p_)
+ if (audio_)
{
- play_element (audio_p_);
- audio_p_ = 0;
+ play_element (audio_);
+ audio_ = 0;
}
}
bool
-Key_performer::do_try_music (Music* req_l)
+Key_performer::try_music (Music* req)
{
- if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
+ if (Key_change_ev *kc = dynamic_cast <Key_change_ev *> (req))
{
- if (key_req_l_)
+ if (key_req_)
warning (_ ("FIXME: key change merge"));
- key_req_l_ = kc;
+ key_req_ = kc;
return true;
}
return false;
}
+ENTER_DESCRIPTION(Key_performer,
+ "","",
+ "key-change-event",
+ "","","");