2 pitched-trill-engraver.cc -- implement Pitched_trill_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
11 #include "axis-group-interface.hh"
15 #include "note-head.hh"
17 #include "pointer-group-interface.hh"
18 #include "side-position-interface.hh"
19 #include "stream-event.hh"
22 class Pitched_trill_engraver : public Engraver
25 TRANSLATOR_DECLARATIONS (Pitched_trill_engraver);
28 DECLARE_ACKNOWLEDGER (note_head);
29 DECLARE_ACKNOWLEDGER (dots);
30 DECLARE_ACKNOWLEDGER (text_spanner);
31 void process_music ();
32 void stop_translation_timestep ();
37 Item *trill_accidental_;
41 void make_trill (Stream_event *);
44 Pitched_trill_engraver::Pitched_trill_engraver ()
48 trill_accidental_ = 0;
52 Pitched_trill_engraver::acknowledge_dots (Grob_info info)
54 heads_.push_back (info.grob ());
57 Pitched_trill_engraver::acknowledge_note_head (Grob_info info)
59 heads_.push_back (info.grob ());
63 Pitched_trill_engraver::acknowledge_text_spanner (Grob_info info)
65 Stream_event *ev = info.event_cause ();
67 && ev->in_event_class ("trill-span-event")
68 && to_dir (ev->get_property ("span-direction")) == START
69 && unsmob_pitch (ev->get_property ("pitch")))
74 Pitched_trill_engraver::make_trill (Stream_event *ev)
76 SCM scm_pitch = ev->get_property ("pitch");
77 Pitch *p = unsmob_pitch (scm_pitch);
79 SCM keysig = get_property ("localKeySignature");
81 SCM key = scm_cons (scm_from_int (p->get_octave ()),
82 scm_from_int (p->get_notename ()));
84 SCM handle = scm_assoc (key, keysig);
86 = (handle == SCM_BOOL_F) || p->get_alteration () == Rational (0);
90 programming_error ("already have a trill head.");
94 trill_head_ = make_item ("TrillPitchHead", ev->self_scm ());
95 SCM c0scm = get_property ("middleCPosition");
97 int c0 = scm_is_number (c0scm) ? scm_to_int (c0scm) : 0;
99 trill_head_->set_property ("staff-position",
100 scm_from_int (unsmob_pitch (scm_pitch)->steps ()
103 trill_group_ = make_item ("TrillPitchGroup", ev->self_scm ());
104 trill_group_->set_parent (trill_head_, Y_AXIS);
106 Axis_group_interface::add_element (trill_group_, trill_head_);
110 trill_accidental_ = make_item ("TrillPitchAccidental", ev->self_scm ());
112 // fixme: naming -> alterations
113 trill_accidental_->set_property ("alteration", ly_rational2scm (p->get_alteration ()));
114 Side_position_interface::add_support (trill_accidental_, trill_head_);
116 trill_head_->set_object ("accidental-grob", trill_accidental_->self_scm ());
117 trill_accidental_->set_parent (trill_head_, Y_AXIS);
118 Axis_group_interface::add_element (trill_group_, trill_accidental_);
123 Pitched_trill_engraver::stop_translation_timestep ()
126 for (vsize i = 0; i < heads_.size (); i++)
127 Side_position_interface::add_support (trill_group_, heads_[i]);
132 trill_accidental_ = 0;
136 Pitched_trill_engraver::process_music ()
141 #include "translator.icc"
143 ADD_ACKNOWLEDGER (Pitched_trill_engraver, note_head);
144 ADD_ACKNOWLEDGER (Pitched_trill_engraver, dots);
145 ADD_ACKNOWLEDGER (Pitched_trill_engraver, text_spanner);
147 ADD_TRANSLATOR (Pitched_trill_engraver,
149 "Print the bracketed notehead after a notehead with trill.",
153 "TrillPitchAccidental "