2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2000--2010 Jan Nieuwenhuizen <janneke@gnu.org>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
20 #include "engraver.hh"
21 #include "pointer-group-interface.hh"
23 #include "rhythmic-head.hh"
24 #include "side-position-interface.hh"
25 #include "staff-symbol-referencer.hh"
32 Create line-spanner grobs for lines that connect note heads.
34 TODO: have the line commit suicide if the notes are connected with
37 class Note_head_line_engraver
: public Engraver
40 TRANSLATOR_DECLARATIONS (Note_head_line_engraver
);
43 DECLARE_ACKNOWLEDGER (rhythmic_head
);
44 void process_acknowledged ();
45 void stop_translation_timestep ();
55 Note_head_line_engraver::Note_head_line_engraver ()
65 Note_head_line_engraver::acknowledge_rhythmic_head (Grob_info info
)
68 Context
*tr
= context ();
70 while (tr
&& !tr
->is_alias (ly_symbol2scm ("Staff")))
71 tr
= tr
->get_parent_context ();
74 && tr
->is_alias (ly_symbol2scm ("Staff")) && tr
!= last_staff_
75 && to_boolean (get_property ("followVoice")))
84 Note_head_line_engraver::process_acknowledged ()
86 if (!line_
&& follow_
&& last_head_
&& head_
)
88 /* TODO: Don't follow if there's a beam.
90 We can't do beam-stuff here, since beam doesn't exist yet.
91 Should probably store follow_ in line_, and suicide at some
94 line_
= make_spanner ("VoiceFollower", head_
->self_scm ());
96 line_
->set_bound (LEFT
, last_head_
);
97 line_
->set_bound (RIGHT
, head_
);
104 Note_head_line_engraver::stop_translation_timestep ()
112 #include "translator.icc"
114 ADD_ACKNOWLEDGER (Note_head_line_engraver
, rhythmic_head
);
115 ADD_TRANSLATOR (Note_head_line_engraver
,
117 "Engrave a line between two note heads, for example a"
118 " glissando. If @code{followVoice} is set, staff switches"
119 " also generate a line.",