2 trill-spanner-engraver.cc -- implement Trill_spanner_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2000--2007 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_[START] = 0;
53 event_drul_[STOP] = 0;
56 IMPLEMENT_TRANSLATOR_LISTENER (Trill_spanner_engraver, trill_span);
58 Trill_spanner_engraver::listen_trill_span (Stream_event *ev)
60 Direction d = to_dir (ev->get_property ("span-direction"));
61 ASSIGN_EVENT_ONCE (event_drul_[d], ev);
65 Trill_spanner_engraver::acknowledge_note_column (Grob_info info)
70 Pointer_group_interface::add_grob (span_,
71 ly_symbol2scm ("note-columns"),
75 ADD_ACKNOWLEDGER (Trill_spanner_engraver, note_column);
79 Trill_spanner_engraver::process_music ()
81 if (event_drul_[STOP])
84 event_drul_[STOP]->origin ()->warning (_ ("cannot find start of trill spanner"));
93 if (event_drul_[START])
96 event_drul_[START]->origin ()->warning (_ ("already have a trill spanner"));
99 current_event_ = event_drul_[START];
100 span_ = make_spanner ("TrillSpanner", event_drul_[START]->self_scm ());
101 Side_position_interface::set_axis (span_, Y_AXIS);
102 event_drul_[START] = 0;
108 Trill_spanner_engraver::typeset_all ()
112 if (!finished_->get_bound (RIGHT))
114 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
115 finished_->set_bound (RIGHT, e);
122 Trill_spanner_engraver::stop_translation_timestep ()
124 if (span_ && !span_->get_bound (LEFT))
126 Grob *e = unsmob_grob (get_property ("currentMusicalColumn"));
127 span_->set_bound (LEFT, e);
131 event_drul_[START] = 0;
132 event_drul_[STOP] = 0;
136 Trill_spanner_engraver::finalize ()
146 ADD_TRANSLATOR (Trill_spanner_engraver,
147 /* doc */ "Create trill spanner from an event.",