src/meter-reg.cc

   1 /*
   2   meter-reg.cc -- implement Meter_register
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "meter-reg.hh"
  10 #include "meter.hh"
  11 #include "commandrequest.hh"
  12
  13 Meter_register::Meter_register()
  14
  15 {
  16     post_move_processing();
  17 }
  18
  19 bool
  20 Meter_register::try_request(Request*r_l)
  21 {
  22     Command_req* creq_l= r_l->command();
  23      if (!creq_l || !creq_l->meterchange())
  24         return false;
  25
  26     assert(!meter_req_l_);
  27     meter_req_l_ = r_l->command()->meterchange();
  28
  29     return true;
  30 }
  31
  32 void
  33 Meter_register::process_requests()
  34 {
  35     if (meter_req_l_ ) {
  36         Array<Scalar> args;
  37         args.push(meter_req_l_->beats_i_);
  38         args.push(meter_req_l_->one_beat_i_);
  39
  40         meter_p_ = new Meter(args);
  41     }
  42
  43     if (meter_p_)
  44         announce_element(Staff_elem_info(meter_p_, meter_req_l_) );
  45 }
  46
  47 void
  48 Meter_register::pre_move_processing()
  49 {
  50     if (meter_p_) {
  51         Meter * post_p =new Meter(*meter_p_);
  52         Meter * pre_p =new Meter(*meter_p_);
  53
  54         typeset_breakable_item(pre_p, meter_p_, post_p);
  55         meter_p_ =0;
  56     }
  57 }
  58
  59 void
  60 Meter_register::post_move_processing()
  61 {
  62     meter_req_l_ = 0;
  63     meter_p_ =0;
  64 }