lily/key-performer.cc

   1 /*
   2   key-performer.cc -- implement Key_performer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include "key-performer.hh"
  10 #include "command-request.hh"
  11 #include "audio-item.hh"
  12
  13
  14 ADD_THIS_TRANSLATOR (Key_performer);
  15
  16 Key_performer::Key_performer ()
  17 {
  18   key_req_l_ = 0;
  19   audio_p_ = 0;
  20 }
  21
  22 Key_performer::~Key_performer ()
  23 {
  24 }
  25
  26 void
  27 Key_performer::do_process_music ()
  28 {
  29   if (key_req_l_ && key_req_l_->pitch_alist_ != SCM_UNDEFINED)
  30     {
  31       audio_p_ = new Audio_key (); // *key_req_l_->key_);
  32       Audio_element_info info (audio_p_, key_req_l_);
  33       announce_element (info);
  34       key_req_l_ = 0;
  35     }
  36 }
  37
  38 void
  39 Key_performer::do_pre_move_processing ()
  40 {
  41   if (audio_p_)
  42     {
  43       play_element (audio_p_);
  44       audio_p_ = 0;
  45     }
  46 }
  47
  48 bool
  49 Key_performer::do_try_music (Music* req_l)
  50 {
  51   if (Key_change_req *kc = dynamic_cast <Key_change_req *> (req_l))
  52     {
  53       if (key_req_l_)
  54         warning (_ ("FIXME: key change merge"));
  55
  56       key_req_l_ = kc;
  57       return true;
  58     }
  59
  60   return false;
  61 }
  62