lily/meter-grav.cc

   1 /*
   2   meter-reg.cc -- implement Meter_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "meter-grav.hh"
  10 #include "meter.hh"
  11 #include "command-request.hh"
  12 #include "timing-grav.hh"
  13 #include "engraver-group.hh"
  14
  15 Meter_engraver::Meter_engraver()
  16 {
  17   meter_p_ =0;
  18 }
  19
  20 void
  21 Meter_engraver::do_process_requests()
  22 {
  23   Timing_engraver * timing_grav_l= (Timing_engraver*)
  24     daddy_grav_l()->get_simple_translator (Timing_engraver::static_name())
  25     ->engraver_l ();
  26
  27   Meter_change_req *req = timing_grav_l->meter_req_l();
  28   if (req)
  29     {
  30       Array<Scalar> args;
  31       args.push (req->beats_i_);
  32       args.push (req->one_beat_i_);
  33
  34       meter_p_ = new Meter (args);
  35     }
  36
  37   if (meter_p_)
  38     announce_element (Score_elem_info (meter_p_, req));
  39 }
  40
  41 void
  42 Meter_engraver::do_pre_move_processing()
  43 {
  44   if (meter_p_)
  45     {
  46       typeset_element (meter_p_);
  47       meter_p_ =0;
  48     }
  49 }
  50
  51
  52 ADD_THIS_TRANSLATOR(Meter_engraver);
  53 IMPLEMENT_IS_TYPE_B1(Meter_engraver,Engraver);