2 note-head-line-engraver.cc -- implement Note_head_line_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2005 Jan Nieuwenhuizen <janneke@gnu.org>
10 #include "pointer-group-interface.hh"
12 #include "rhythmic-head.hh"
13 #include "side-position-interface.hh"
14 #include "staff-symbol-referencer.hh"
18 Create line-spanner grobs for lines that connect note heads.
20 TODO: have the line commit suicide if the notes are connected with
23 class Note_head_line_engraver : public Engraver
26 TRANSLATOR_DECLARATIONS (Note_head_line_engraver);
29 DECLARE_ACKNOWLEDGER (rhythmic_head);
30 void process_acknowledged ();
31 void stop_translation_timestep ();
41 Note_head_line_engraver::Note_head_line_engraver ()
51 Note_head_line_engraver::acknowledge_rhythmic_head (Grob_info info)
54 if (to_boolean (get_property ("followVoice")))
56 Context *tr = context ();
57 while (tr && !tr->is_alias (ly_symbol2scm ("Staff")))
58 tr = tr->get_parent_context ();
61 && tr->is_alias (ly_symbol2scm ("Staff")) && tr != last_staff_)
71 Note_head_line_engraver::process_acknowledged ()
73 if (!line_ && follow_ && last_head_ && head_)
75 /* TODO: Don't follow if there's a beam.
77 We can't do beam-stuff here, since beam doesn't exist yet.
78 Should probably store follow_ in line_, and suicide at some
81 line_ = make_spanner ("VoiceFollower", head_->self_scm ());
83 line_->set_bound (LEFT, last_head_);
84 line_->set_bound (RIGHT, head_);
91 Note_head_line_engraver::stop_translation_timestep ()
99 #include "translator.icc"
100 ADD_ACKNOWLEDGER (Note_head_line_engraver, rhythmic_head);
101 ADD_TRANSLATOR (Note_head_line_engraver,
102 /* doc */ "Engrave a line between two note heads, for example a glissando. If "
103 " followVoice is set, staff switches also generate a line.",
104 /* create */ "Glissando VoiceFollower",
105 /* accept */ "glissando-event",
106 /* read */ "followVoice",