lily/time-signature-performer.cc

   1 /*
   2   time-signature-performer.cc -- implement Time_signature_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 "time-signature-performer.hh"
  10 #include "command-request.hh"
  11 #include "audio-item.hh"
  12
  13 ADD_THIS_TRANSLATOR (Time_signature_performer);
  14
  15 Time_signature_performer::Time_signature_performer ()
  16 {
  17   time_signature_req_l_ = 0;
  18   audio_p_ = 0;
  19 }
  20
  21 Time_signature_performer::~Time_signature_performer ()
  22 {
  23 }
  24
  25 void
  26 Time_signature_performer::do_print () const
  27 {
  28 #ifndef NPRINT
  29   if (time_signature_req_l_)
  30     time_signature_req_l_->print ();
  31 #endif
  32 }
  33
  34 void
  35 Time_signature_performer::do_process_music ()
  36 {
  37   if (time_signature_req_l_)
  38     {
  39       audio_p_ = new Audio_time_signature (time_signature_req_l_->beats_i_, time_signature_req_l_->one_beat_i_);
  40       Audio_element_info info (audio_p_, time_signature_req_l_);
  41       announce_element (info);
  42       time_signature_req_l_ = 0;
  43     }
  44 }
  45
  46 void
  47 Time_signature_performer::do_pre_move_processing ()
  48 {
  49   if (audio_p_)
  50     {
  51       play_element (audio_p_);
  52       audio_p_ = 0;
  53     }
  54 }
  55
  56 bool
  57 Time_signature_performer::do_try_music (Music* req_l)
  58 {
  59   if (time_signature_req_l_)
  60     return false;
  61
  62   if (Time_signature_change_req *t =
  63       dynamic_cast <Time_signature_change_req *> (req_l))
  64     {
  65       time_signature_req_l_ = t;
  66       return true;
  67     }
  68
  69   return false;
  70 }
  71