2 collision-engraver.cc -- implement Collision_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2007 Han-Wen Nienhuys <hanwen@xs4all.nl>
10 #include "note-column.hh"
11 #include "note-collision.hh"
12 #include "axis-group-interface.hh"
15 class Collision_engraver
: public Engraver
18 vector
<Grob
*> note_columns_
;
21 DECLARE_ACKNOWLEDGER (note_column
);
22 void process_acknowledged ();
23 void stop_translation_timestep ();
25 TRANSLATOR_DECLARATIONS (Collision_engraver
);
29 Collision_engraver::process_acknowledged ()
31 if (col_
|| note_columns_
.size () < 2)
34 col_
= make_item ("NoteCollision", SCM_EOL
);
36 for (vsize i
= 0; i
< note_columns_
.size (); i
++)
37 Note_collision_interface::add_column (col_
, note_columns_
[i
]);
41 Collision_engraver::acknowledge_note_column (Grob_info i
)
43 if (Note_column::has_interface (i
.grob ()))
45 /*should check Y axis? */
46 if (Note_column::has_rests (i
.grob ()) || i
.grob ()->get_parent (X_AXIS
))
49 if (to_boolean (i
.grob ()->get_property ("ignore-collision")))
52 note_columns_
.push_back (i
.grob ());
57 Collision_engraver::stop_translation_timestep ()
60 note_columns_
.clear ();
63 Collision_engraver::Collision_engraver ()
68 #include "translator.icc"
70 ADD_ACKNOWLEDGER (Collision_engraver
, note_column
);
72 ADD_TRANSLATOR (Collision_engraver
,
73 /* doc */ "Collect NoteColumns, and as soon as there are two or more, put them in a NoteCollision object.",
74 /* create */ "NoteCollision",