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--1998 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 IMPLEMENT_IS_TYPE_B1(Time_signature_performer,Performer);
  14 ADD_THIS_TRANSLATOR(Time_signature_performer);
  15
  16 Time_signature_performer::Time_signature_performer()
  17 {
  18   time_signature_req_l_ = 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_requests()
  36 {
  37   if (time_signature_req_l_)
  38     play (new Audio_time_signature (time_signature_req_l_));
  39   time_signature_req_l_ = 0;
  40 }
  41
  42 bool
  43 Time_signature_performer::do_try_request (Request* req_l)
  44 {
  45   if (time_signature_req_l_)
  46     return false;
  47
  48   if (dynamic_cast <Command_req *> (req_l))
  49     time_signature_req_l_ = dynamic_cast <Time_signature_change_req *> (req_l);
  50
  51   if (time_signature_req_l_)
  52     return true;
  53
  54   return false;
  55 }
  56