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> reqs_;
20 Link_array<Item> fingerings_;
23 TRANSLATOR_DECLARATIONS (Fingering_engraver);
25 virtual bool try_music (Music *m);
26 PRECOMPUTED_VIRTUAL void stop_translation_timestep ();
27 PRECOMPUTED_VIRTUAL void start_translation_timestep ();
28 PRECOMPUTED_VIRTUAL void process_music ();
29 virtual void acknowledge_grob (Grob_info);
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_grob (Grob_info inf)
49 if (Stem::has_interface (inf.grob ()))
51 for (int i = 0; i < fingerings_.size (); i++)
53 Side_position_interface::add_support (fingerings_[i], inf.grob ());
56 else if (Rhythmic_head::has_interface (inf.grob ()))
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);
69 Fingering_engraver::process_music ()
71 for (int i = reqs_.size (); i--;)
73 SCM dir = reqs_[i]->get_property ("direction");
74 make_script (to_dir (dir), reqs_[i], i);
79 Fingering_engraver::make_script (Direction d, Music *r, int i)
81 Item *fingering = make_item ("Fingering", r->self_scm ());
83 Axis other = other_axis (a);
86 Huh, what's this for? --hwn.
90 SCM pitch = r->get_property ("pitch");
91 if (unsmob_pitch (pitch))
92 fingering->set_property ("pitch", pitch);
95 We can't fold these definitions into define-grobs since
96 fingerings for chords need different settings.
98 Side_position_interface::set_axis (fingering, a);
99 fingering->add_offset_callback (Self_alignment_interface::aligned_on_self_proc, other);
100 fingering->add_offset_callback (Self_alignment_interface::centered_on_parent_proc, other);
104 SCM s = fingering->get_property ("script-priority");
105 if (scm_is_number (s))
106 priority = scm_to_int (s);
108 /* See script-engraver.cc */
111 fingering->set_property ("script-priority", scm_int2num (priority));
113 if (!is_direction (fingering->get_property ("direction")))
116 fingering->set_property ("direction", scm_int2num (d));
118 fingering->set_property ("direction", scm_int2num (RIGHT));
121 SCM dig = r->get_property ("digit");
122 fingering->set_property ("text", scm_number_to_string (dig, scm_int2num (10)));
124 fingerings_.push (fingering);
128 Fingering_engraver::stop_translation_timestep ()
130 if (!fingerings_.size ())
133 fingerings_.clear ();
137 Fingering_engraver::start_translation_timestep ()
142 Fingering_engraver::Fingering_engraver ()
146 #include "translator.icc"
148 ADD_TRANSLATOR (Fingering_engraver,
149 /* descr */ "Create fingering-scripts",
150 /* creats*/ "Fingering",
151 /* accepts */ "fingering-event",
152 /* acks */ "rhythmic-head-interface stem-interface",