2 fingering-engraver.cc -- implement Fingering_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
11 #include "rhythmic-head.hh"
12 #include "self-alignment-interface.hh"
13 #include "side-position-interface.hh"
15 #include "stream-event.hh"
17 #include "translator.icc"
19 class Fingering_engraver : public Engraver
21 vector<Stream_event*> events_;
22 vector<Item*> fingerings_;
25 TRANSLATOR_DECLARATIONS (Fingering_engraver);
27 void stop_translation_timestep ();
28 void process_music ();
29 DECLARE_TRANSLATOR_LISTENER (fingering);
30 DECLARE_ACKNOWLEDGER (rhythmic_head);
31 DECLARE_ACKNOWLEDGER (stem);
34 void make_script (Direction, Stream_event *, int);
37 IMPLEMENT_TRANSLATOR_LISTENER (Fingering_engraver, fingering);
39 Fingering_engraver::listen_fingering (Stream_event *ev)
41 events_.push_back (ev);
45 Fingering_engraver::acknowledge_stem (Grob_info inf)
47 for (vsize i = 0; i < fingerings_.size (); i++)
48 Side_position_interface::add_support (fingerings_[i], inf.grob ());
52 Fingering_engraver::acknowledge_rhythmic_head (Grob_info inf)
54 for (vsize i = 0; i < fingerings_.size (); i++)
56 Grob *t = fingerings_[i];
57 Side_position_interface::add_support (t, inf.grob ());
58 if (!t->get_parent (X_AXIS))
59 t->set_parent (inf.grob (), X_AXIS);
64 Fingering_engraver::process_music ()
66 for (vsize i = events_.size (); i--;)
68 SCM dir = events_[i]->get_property ("direction");
69 make_script (to_dir (dir), events_[i], i);
74 Fingering_engraver::make_script (Direction d, Stream_event *r, int i)
76 Item *fingering = make_item ("Fingering", r->self_scm ());
79 Huh, what's this for? --hwn.
83 SCM pitch = r->get_property ("pitch");
84 if (unsmob_pitch (pitch))
85 fingering->set_property ("pitch", pitch);
88 We can't fold these definitions into define-grobs since
89 fingerings for chords need different settings.
91 Side_position_interface::set_axis (fingering, Y_AXIS);
92 Self_alignment_interface::set_align_self (fingering, X_AXIS);
93 Self_alignment_interface::set_center_parent (fingering, X_AXIS);
97 SCM s = fingering->get_property ("script-priority");
98 if (scm_is_number (s))
99 priority = scm_to_int (s);
101 /* See script-engraver.cc */
104 fingering->set_property ("script-priority", scm_from_int (priority));
106 if (!is_direction (fingering->get_property_data (ly_symbol2scm ("direction"))))
109 fingering->set_property ("direction", scm_from_int (d));
111 fingering->set_property ("direction", scm_from_int (RIGHT));
114 fingerings_.push_back (fingering);
118 Fingering_engraver::stop_translation_timestep ()
120 if (!fingerings_.size ())
123 fingerings_.clear ();
127 Fingering_engraver::Fingering_engraver ()
131 ADD_ACKNOWLEDGER (Fingering_engraver, rhythmic_head);
132 ADD_ACKNOWLEDGER (Fingering_engraver, stem);
133 ADD_TRANSLATOR (Fingering_engraver,
134 /* doc */ "Create fingering-scripts",
135 /* create */ "Fingering",
136 /* accept */ "fingering-event",