2 trill-spanner-engraver.cc -- implement Trill_spanner_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2009 Jan Nieuwenhuizen <janneke@gnu.org>
10 C&P from text-spanner.cc
12 - todo: ending should be detected automatically? a new note
13 automatically is the end of the trill?
16 #include "engraver.hh"
18 #include "international.hh"
19 #include "note-column.hh"
20 #include "pointer-group-interface.hh"
21 #include "side-position-interface.hh"
22 #include "stream-event.hh"
25 #include "translator.icc"
27 class Trill_spanner_engraver : public Engraver
30 TRANSLATOR_DECLARATIONS (Trill_spanner_engraver);
32 virtual void finalize ();
33 DECLARE_TRANSLATOR_LISTENER (trill_span);
34 DECLARE_ACKNOWLEDGER (note_column);
36 void stop_translation_timestep ();
37 void process_music ();
42 Stream_event *current_event_;
43 Drul_array<Stream_event *> event_drul_;
47 Trill_spanner_engraver::Trill_spanner_engraver ()
52 event_drul_.set (0, 0);
55 IMPLEMENT_TRANSLATOR_LISTENER (Trill_spanner_engraver, trill_span);
57 Trill_spanner_engraver::listen_trill_span (Stream_event *ev)
59 Direction d = to_dir (ev->get_property ("span-direction"));
60 ASSIGN_EVENT_ONCE (event_drul_[d], ev);
64 Trill_spanner_engraver::acknowledge_note_column (Grob_info info)
68 Pointer_group_interface::add_grob (span_,
69 ly_symbol2scm ("note-columns"),
71 if (!span_->get_bound (LEFT))
72 add_bound_item (span_, info.grob ());
76 Pointer_group_interface::add_grob (finished_, ly_symbol2scm ("note-columns"),
78 if (!finished_->get_bound (RIGHT))
79 add_bound_item (finished_, info.grob ());
84 Trill_spanner_engraver::process_music ()
87 && (event_drul_[STOP] || event_drul_[START]))
89 Stream_event *ender = event_drul_[STOP];
91 ender = event_drul_[START];
93 announce_end_grob (finished_, ender->self_scm ());
98 if (event_drul_[START])
100 current_event_ = event_drul_[START];
101 span_ = make_spanner ("TrillSpanner", event_drul_[START]->self_scm ());
102 Side_position_interface::set_axis (span_, Y_AXIS);
107 Trill_spanner_engraver::typeset_all ()
111 if (!finished_->get_bound (RIGHT))
113 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
114 finished_->set_bound (RIGHT, e);
121 Trill_spanner_engraver::stop_translation_timestep ()
123 if (span_ && !span_->get_bound (LEFT))
125 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
126 span_->set_bound (LEFT, e);
130 event_drul_.set (0, 0);
134 Trill_spanner_engraver::finalize ()
139 Grob *e = unsmob_grob (get_property ("currentCommandColumn"));
140 span_->set_bound (RIGHT, e);
144 ADD_ACKNOWLEDGER (Trill_spanner_engraver, note_column);
146 ADD_TRANSLATOR (Trill_spanner_engraver,
148 "Create trill spanner from an event.",
154 "currentCommandColumn "
155 "currentMusicalColumn ",