lily/breathing-sign-engraver.cc

   1 /*
   2   breathing_sign-engraver.cc -- implement Breathing_sign_engraver
   3
   4   Copyright (C) 1999 Michael Krause
   5
   6   written for the GNU LilyPond music typesetter
   7
   8 TODO:
   9
  10   . Cancel any beams running through the breathing sign
  11     ([e8 \breathe f e f] should become [e8] \breathe [f e f])
  12   . Spacing is not yet completely pretty
  13
  14 */
  15
  16 #include "breathing-sign-engraver.hh"
  17 #include "breathing-sign.hh"
  18 #include "musical-request.hh"
  19 #include "command-request.hh"
  20 #include "engraver-group-engraver.hh"
  21 #include "note-head.hh"
  22 #include "local-key-item.hh"
  23
  24
  25 Breathing_sign_engraver::Breathing_sign_engraver()
  26 {
  27   breathing_sign_p_ = 0;
  28   breathing_sign_req_l_ = 0;
  29 }
  30
  31 bool
  32 Breathing_sign_engraver::do_try_music (Music*r_l)
  33 {
  34   if (Breathing_sign_req  * b= dynamic_cast <Breathing_sign_req *> (r_l)) {
  35     breathing_sign_req_l_ = b;
  36     return true;
  37   }
  38
  39   return false;
  40 }
  41
  42 void
  43 Breathing_sign_engraver::do_process_requests()
  44 {
  45   if(breathing_sign_req_l_) {
  46     breathing_sign_p_ = new Breathing_sign;
  47
  48     Scalar prop = get_property ("verticalDirection", 0);
  49     if(prop.isnum_b())
  50       breathing_sign_p_->set_vertical_position((Direction)int(prop));
  51
  52     announce_element (Score_element_info (breathing_sign_p_, breathing_sign_req_l_));
  53   }
  54 }
  55
  56 void
  57 Breathing_sign_engraver::do_pre_move_processing()
  58 {
  59   if(breathing_sign_p_) {
  60     typeset_element(breathing_sign_p_);
  61     breathing_sign_p_ = 0;
  62   }
  63 }
  64
  65 void
  66 Breathing_sign_engraver::do_post_move_processing()
  67 {
  68     breathing_sign_req_l_ = 0;
  69 }
  70
  71 ADD_THIS_TRANSLATOR(Breathing_sign_engraver);