lily/time-signature-engraver.cc

   1 /*
   2   time_signature-reg.cc -- implement Time_signature_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "time-signature-engraver.hh"
  10 #include "time-signature.hh"
  11 #include "command-request.hh"
  12 #include "timing-engraver.hh"
  13 #include "engraver-group-engraver.hh"
  14
  15 ADD_THIS_TRANSLATOR (Time_signature_engraver);
  16
  17 Time_signature_engraver::Time_signature_engraver()
  18 {
  19   time_signature_p_ =0;
  20 }
  21
  22 void
  23 Time_signature_engraver::do_process_requests()
  24 {
  25   Translator * result =
  26     daddy_grav_l()->get_simple_translator ("Timing_engraver");  // ugh
  27
  28   if (!result)
  29     {
  30       warning (_ ("lost in time:"));
  31       warning (_f ("Can't find: `%s'", " Timing_translator"));
  32       return ;
  33     }
  34
  35   Timing_engraver * timing_grav_l= dynamic_cast<Timing_engraver *> (result);
  36
  37   Time_signature_change_req *req = timing_grav_l->time_signature_req_l();
  38   if (req)
  39     {
  40       Array<int> args;
  41       args.push (req->beats_i_);
  42       args.push (req->one_beat_i_);
  43
  44       time_signature_p_ = new Time_signature;
  45       time_signature_p_->args_ = args;
  46       time_signature_p_->set_elt_property ("break-aligned", SCM_BOOL_T);
  47     }
  48
  49
  50   if (time_signature_p_)
  51     announce_element (Score_element_info (time_signature_p_, req));
  52 }
  53
  54 void
  55 Time_signature_engraver::do_pre_move_processing()
  56 {
  57   if (time_signature_p_)
  58     {
  59       typeset_element (time_signature_p_);
  60       time_signature_p_ =0;
  61     }
  62 }
  63
  64