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
  26 void
  27 Time_signature_performer::do_process_music ()
  28 {
  29   if (time_signature_req_l_)
  30     {
  31       audio_p_ = new Audio_time_signature (time_signature_req_l_->beats_i_, time_signature_req_l_->one_beat_i_);
  32       Audio_element_info info (audio_p_, time_signature_req_l_);
  33       announce_element (info);
  34       time_signature_req_l_ = 0;
  35     }
  36 }
  37
  38 void
  39 Time_signature_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 Time_signature_performer::do_try_music (Music* req_l)
  50 {
  51   if (time_signature_req_l_)
  52     return false;
  53
  54   if (Time_signature_change_req *t =
  55       dynamic_cast <Time_signature_change_req *> (req_l))
  56     {
  57       time_signature_req_l_ = t;
  58       return true;
  59     }
  60
  61   return false;
  62 }
  63