2 rest-collision-reg.cc -- implement Rest_collision_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "rest-collision.hh"
11 #include "engraver.hh"
12 #include "collision.hh"
13 #include "note-column.hh"
15 class Rest_collision_engraver : public Engraver
17 Item* rest_collision_p_;
19 Link_array<Grob> note_column_l_arr_;
21 virtual void acknowledge_grob (Grob_info);
22 virtual void create_grobs ();
23 virtual void stop_translation_timestep ();
25 TRANSLATOR_DECLARATIONS(Rest_collision_engraver);
30 Rest_collision_engraver::Rest_collision_engraver ()
36 Rest_collision_engraver::create_grobs ()
38 if (rest_collision_p_ || note_column_l_arr_.size () < 2)
41 rest_collision_p_ = new Item (get_property ("RestCollision"));
42 Rest_collision::set_interface (rest_collision_p_);
43 announce_grob (rest_collision_p_, 0);
44 for (int i=0; i< note_column_l_arr_.size (); i++)
45 Rest_collision::add_column (rest_collision_p_,note_column_l_arr_[i]);
49 Rest_collision_engraver::acknowledge_grob (Grob_info i)
51 if (Note_column::has_interface (i.grob_l_))
52 note_column_l_arr_.push (i.grob_l_);
56 Rest_collision_engraver::stop_translation_timestep ()
58 if (rest_collision_p_)
60 typeset_grob (rest_collision_p_);
61 rest_collision_p_ = 0;
63 note_column_l_arr_.clear ();
65 ENTER_DESCRIPTION(Rest_collision_engraver,
66 /* descr */ "Handles collisions of rests.",
67 /* creats*/ "RestCollision",
68 /* acks */ "note-column-interface",