2 fingering-engraver.cc -- implement Fingering_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
10 #include "side-position-interface.hh"
12 #include "rhythmic-head.hh"
13 #include "self-alignment-interface.hh"
16 class Fingering_engraver : public Engraver
18 Link_array<Music> events_;
19 Link_array<Item> fingerings_;
22 TRANSLATOR_DECLARATIONS (Fingering_engraver);
24 virtual bool try_music (Music *m);
25 void stop_translation_timestep ();
26 void process_music ();
27 DECLARE_ACKNOWLEDGER (rhythmic_head);
28 DECLARE_ACKNOWLEDGER (stem);
31 void make_script (Direction, Music *, int);
35 Fingering_engraver::try_music (Music *m)
37 if (m->is_mus_type ("fingering-event"))
46 Fingering_engraver::acknowledge_stem (Grob_info inf)
48 for (int i = 0; i < fingerings_.size (); i++)
49 Side_position_interface::add_support (fingerings_[i], inf.grob ());
53 Fingering_engraver::acknowledge_rhythmic_head (Grob_info inf)
55 for (int i = 0; i < fingerings_.size (); i++)
57 Grob *t = fingerings_[i];
58 Side_position_interface::add_support (t, inf.grob ());
59 if (!t->get_parent (X_AXIS))
60 t->set_parent (inf.grob (), X_AXIS);
65 Fingering_engraver::process_music ()
67 for (int i = events_.size (); i--;)
69 SCM dir = events_[i]->get_property ("direction");
70 make_script (to_dir (dir), events_[i], i);
75 Fingering_engraver::make_script (Direction d, Music *r, int i)
77 Item *fingering = make_item ("Fingering", r->self_scm ());
79 Axis other = other_axis (a);
82 Huh, what's this for? --hwn.
86 SCM pitch = r->get_property ("pitch");
87 if (unsmob_pitch (pitch))
88 fingering->set_property ("pitch", pitch);
91 We can't fold these definitions into define-grobs since
92 fingerings for chords need different settings.
94 Side_position_interface::set_axis (fingering, a);
95 fingering->add_offset_callback (Self_alignment_interface::aligned_on_self_proc, other);
96 fingering->add_offset_callback (Self_alignment_interface::centered_on_parent_proc, other);
100 SCM s = fingering->get_property ("script-priority");
101 if (scm_is_number (s))
102 priority = scm_to_int (s);
104 /* See script-engraver.cc */
107 fingering->set_property ("script-priority", scm_from_int (priority));
109 if (!is_direction (fingering->get_property_data (ly_symbol2scm ("direction"))))
112 fingering->set_property ("direction", scm_from_int (d));
114 fingering->set_property ("direction", scm_from_int (RIGHT));
117 SCM dig = r->get_property ("digit");
118 fingering->set_property ("text", scm_number_to_string (dig, scm_from_int (10)));
120 fingerings_.push (fingering);
124 Fingering_engraver::stop_translation_timestep ()
126 if (!fingerings_.size ())
129 fingerings_.clear ();
133 Fingering_engraver::Fingering_engraver ()
137 #include "translator.icc"
139 ADD_ACKNOWLEDGER (Fingering_engraver, rhythmic_head);
140 ADD_ACKNOWLEDGER (Fingering_engraver, stem);
141 ADD_TRANSLATOR (Fingering_engraver,
142 /* doc */ "Create fingering-scripts",
143 /* create */ "Fingering",
144 /* accept */ "fingering-event",