2 trill-spanner-engraver.cc -- implement Trill_spanner_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2006 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 "side-position-interface.hh"
21 #include "stream-event.hh"
23 #include "translator.icc"
25 class Trill_spanner_engraver : public Engraver
28 TRANSLATOR_DECLARATIONS (Trill_spanner_engraver);
30 virtual void finalize ();
31 DECLARE_ACKNOWLEDGER (note_column);
32 DECLARE_TRANSLATOR_LISTENER (trill_span);
33 void stop_translation_timestep ();
34 void process_music ();
39 Stream_event *current_event_;
40 Drul_array<Stream_event *> event_drul_;
44 Trill_spanner_engraver::Trill_spanner_engraver ()
49 event_drul_[START] = 0;
50 event_drul_[STOP] = 0;
53 IMPLEMENT_TRANSLATOR_LISTENER (Trill_spanner_engraver, trill_span);
55 Trill_spanner_engraver::listen_trill_span (Stream_event *ev)
57 Direction d = to_dir (ev->get_property ("span-direction"));
62 Trill_spanner_engraver::process_music ()
64 if (event_drul_[STOP])
67 event_drul_[STOP]->origin ()->warning (_ ("can't find start of trill spanner"));
76 if (event_drul_[START])
79 event_drul_[START]->origin ()->warning (_ ("already have a trill spanner"));
82 current_event_ = event_drul_[START];
83 span_ = make_spanner ("TrillSpanner", event_drul_[START]->self_scm ());
84 Side_position_interface::set_axis (span_, Y_AXIS);
85 event_drul_[START] = 0;
91 Trill_spanner_engraver::acknowledge_note_column (Grob_info info)
93 Spanner *spans[2] ={span_, finished_};
94 for (int i = 0; i < 2; i++)
98 Side_position_interface::add_support (spans[i], info.grob ());
99 add_bound_item (spans[i], dynamic_cast<Item *> (info.grob ()));
105 Trill_spanner_engraver::typeset_all ()
109 if (!finished_->get_bound (RIGHT))
111 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
112 finished_->set_bound (RIGHT, e);
119 Trill_spanner_engraver::stop_translation_timestep ()
121 if (span_ && !span_->get_bound (LEFT))
123 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
124 span_->set_bound (LEFT, e);
128 event_drul_[START] = 0;
129 event_drul_[STOP] = 0;
133 Trill_spanner_engraver::finalize ()
143 ADD_ACKNOWLEDGER (Trill_spanner_engraver, note_column);
144 ADD_TRANSLATOR (Trill_spanner_engraver,
145 /* doc */ "Create trill spanner from a Music.",
146 /* create */ "TrillSpanner",
147 /* accept */ "trill-span-event",