lily/rest-collision-engraver.cc

   1 /*
   2   rest-collision-reg.cc -- implement Rest_collision_engraver
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "debug.hh"
  10 #include "rest-collision.hh"
  11 #include "engraver.hh"
  12 #include "collision.hh"
  13 #include "note-column.hh"
  14
  15
  16 class Rest_collision_engraver : public Engraver
  17 {
  18   Item* rest_collision_p_;
  19
  20   Link_array<Note_column> note_column_l_arr_;
  21 protected:
  22   virtual void acknowledge_element (Score_element_info);
  23   virtual void process_acknowledged ();
  24   virtual void do_pre_move_processing();
  25 public:
  26   VIRTUAL_COPY_CONS(Translator);
  27   Rest_collision_engraver();
  28
  29 };
  30
  31 ADD_THIS_TRANSLATOR(Rest_collision_engraver);
  32
  33 Rest_collision_engraver::Rest_collision_engraver()
  34 {
  35   rest_collision_p_ =0;
  36 }
  37
  38 void
  39 Rest_collision_engraver::process_acknowledged ()
  40 {
  41   if (rest_collision_p_ || note_column_l_arr_.size () < 2)
  42     return;
  43
  44   rest_collision_p_ = new Item (get_property ("basicRestCollisionProperties"));
  45   Rest_collision (rest_collision_p_).set_interface();
  46   announce_element (Score_element_info (rest_collision_p_, 0));
  47   for (int i=0; i< note_column_l_arr_.size (); i++)
  48     Rest_collision (rest_collision_p_).add_column (note_column_l_arr_[i]);
  49 }
  50
  51 void
  52 Rest_collision_engraver::acknowledge_element (Score_element_info i)
  53 {
  54   if (dynamic_cast<Note_column *> (i.elem_l_))
  55     note_column_l_arr_.push (dynamic_cast<Note_column *> (i.elem_l_));
  56 }
  57
  58 void
  59 Rest_collision_engraver::do_pre_move_processing()
  60 {
  61   if (rest_collision_p_)
  62     {
  63       typeset_element (rest_collision_p_);
  64       rest_collision_p_ = 0;
  65     }
  66   note_column_l_arr_.clear ();
  67 }