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"
17 class Fingering_engraver : public Engraver
19 Link_array<Music> events_;
20 Link_array<Item> fingerings_;
23 TRANSLATOR_DECLARATIONS (Fingering_engraver);
25 virtual bool try_music (Music *m);
26 void stop_translation_timestep ();
27 void process_music ();
28 DECLARE_ACKNOWLEDGER (rhythmic_head);
29 DECLARE_ACKNOWLEDGER (stem);
32 void make_script (Direction, Music *, int);
36 Fingering_engraver::try_music (Music *m)
38 if (m->is_mus_type ("fingering-event"))
47 Fingering_engraver::acknowledge_stem (Grob_info inf)
49 for (int i = 0; i < fingerings_.size (); i++)
51 Side_position_interface::add_support (fingerings_[i], inf.grob ());
56 Fingering_engraver::acknowledge_rhythmic_head (Grob_info inf)
58 for (int i = 0; i < fingerings_.size (); i++)
60 Grob *t = fingerings_[i];
61 Side_position_interface::add_support (t, inf.grob ());
62 if (!t->get_parent (X_AXIS))
63 t->set_parent (inf.grob (), X_AXIS);
68 Fingering_engraver::process_music ()
70 for (int i = events_.size (); i--;)
72 SCM dir = events_[i]->get_property ("direction");
73 make_script (to_dir (dir), events_[i], i);
78 Fingering_engraver::make_script (Direction d, Music *r, int i)
80 Item *fingering = make_item ("Fingering", r->self_scm ());
82 Axis other = other_axis (a);
85 Huh, what's this for? --hwn.
89 SCM pitch = r->get_property ("pitch");
90 if (unsmob_pitch (pitch))
91 fingering->set_property ("pitch", pitch);
94 We can't fold these definitions into define-grobs since
95 fingerings for chords need different settings.
97 Side_position_interface::set_axis (fingering, a);
98 fingering->add_offset_callback (Self_alignment_interface::aligned_on_self_proc, other);
99 fingering->add_offset_callback (Self_alignment_interface::centered_on_parent_proc, other);
103 SCM s = fingering->get_property ("script-priority");
104 if (scm_is_number (s))
105 priority = scm_to_int (s);
107 /* See script-engraver.cc */
110 fingering->set_property ("script-priority", scm_from_int (priority));
112 if (!is_direction (fingering->get_property ("direction")))
115 fingering->set_property ("direction", scm_from_int (d));
117 fingering->set_property ("direction", scm_from_int (RIGHT));
120 SCM dig = r->get_property ("digit");
121 fingering->set_property ("text", scm_number_to_string (dig, scm_from_int (10)));
123 fingerings_.push (fingering);
127 Fingering_engraver::stop_translation_timestep ()
129 if (!fingerings_.size ())
132 fingerings_.clear ();
136 Fingering_engraver::Fingering_engraver ()
140 #include "translator.icc"
142 ADD_ACKNOWLEDGER (Fingering_engraver,rhythmic_head);
143 ADD_ACKNOWLEDGER (Fingering_engraver,stem);
144 ADD_TRANSLATOR (Fingering_engraver,
145 /* doc */ "Create fingering-scripts",
146 /* create */ "Fingering",
147 /* accept */ "fingering-event",