2 collision-reg.cc -- implement Collision_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
9 #include "note-column.hh"
10 #include "collision.hh"
12 #include "engraver.hh"
13 #include "axis-group-interface.hh"
16 collect Note_column, and as soon as there are 2 or more, put them in
17 a collision object. */
18 class Collision_engraver : public Engraver {
20 Link_array<Score_element> note_column_l_arr_;
23 virtual void acknowledge_element (Score_element_info);
24 virtual void process_acknowledged ();
25 virtual void do_pre_move_processing();
27 VIRTUAL_COPY_CONS(Translator);
33 Collision_engraver::process_acknowledged ()
35 if (col_p_ || note_column_l_arr_.size () < 2)
39 col_p_ = new Item (get_property ("NoteCollision"));
40 Axis_group_interface::set_interface (col_p_);
41 Axis_group_interface::set_axes (col_p_, X_AXIS, Y_AXIS);
43 announce_element (col_p_,0);
46 for (int i=0; i< note_column_l_arr_.size (); i++)
47 Collision::add_column (col_p_,note_column_l_arr_[i]);
51 Collision_engraver::acknowledge_element (Score_element_info i)
53 if (Note_column::has_interface (i.elem_l_))
55 /*should check Y axis? */
56 if (Note_column::rest_b (i.elem_l_) || i.elem_l_->parent_l(X_AXIS))
59 note_column_l_arr_.push (i.elem_l_);
64 Collision_engraver::do_pre_move_processing()
68 typeset_element (col_p_);
71 note_column_l_arr_.clear ();
74 Collision_engraver::Collision_engraver()
81 ADD_THIS_TRANSLATOR(Collision_engraver);