2 fingering-engraver.cc -- implement New_fingering_engraver
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2002 Han-Wen Nienhuys <hanwen@cs.uu.nl>
11 #include "engraver.hh"
12 #include "side-position-interface.hh"
16 #include "rhythmic-head.hh"
17 #include "self-alignment-interface.hh"
29 static int compare (Finger_tuple const & c1, Finger_tuple const & c2)
31 return c1.position_- c2.position_;
36 class New_fingering_engraver : public Engraver
38 Array<Finger_tuple> fingerings_;
40 TRANSLATOR_DECLARATIONS(New_fingering_engraver);
42 virtual void stop_translation_timestep ();
43 virtual void acknowledge_grob (Grob_info);
44 void add_fingering (Grob*, Music*,Music*);
45 void position_scripts();
49 New_fingering_engraver::acknowledge_grob (Grob_info inf)
51 if (Rhythmic_head::has_interface (inf.grob_))
53 Music * note_ev =inf.music_cause ();
55 SCM arts = note_ev->get_mus_property ("articulations");
57 for (SCM s = arts; gh_pair_p (s); s = gh_cdr (s))
59 Music * m = unsmob_music (gh_car (s));
65 if (m->is_mus_type ("fingering-event"))
67 add_fingering (inf.grob_ , m, note_ev);
69 else if (m->is_mus_type ("script-event"))
78 New_fingering_engraver::add_fingering (Grob * head,
84 ft.fingering_ = new Item (get_property ("Fingering"));
85 announce_grob (ft.fingering_, event->self_scm());
87 Side_position_interface::add_support (ft.fingering_, head);
89 int d = gh_scm2int ( event->get_mus_property ("digit"));
94 Should add support for thumb. It's a little involved, since
95 the thumb lives in a different font. Maybe it should be moved?
102 music for the softenon children?
104 event->origin()->warning (_("music for the martians."));
106 SCM sstr = scm_number_to_string (gh_int2scm (d), gh_int2scm (10)) ;
107 ft.fingering_->set_grob_property ("text", sstr);
109 ft.finger_event_ = event;
110 ft.note_event_ = hevent;
113 fingerings_.push (ft);
117 New_fingering_engraver::position_scripts ()
121 This is not extremely elegant, but we have to do a little
122 formatting here, because the parent/child relations should be
123 known before we move on to the next time step.
125 A more sophisticated approach would be to set both X and Y parents
126 to the note head, and write a more flexible function for
127 positioning the fingerings, setting both X and Y coordinates.
131 for (int i = 0; i < fingerings_.size(); i++)
133 fingerings_[i].position_ = gh_scm2int (fingerings_[i].head_ -> get_grob_property( "staff-position"));
136 Array<Finger_tuple> up, down, horiz;
137 for (int i = fingerings_.size(); i--;)
139 SCM d = fingerings_[i].finger_event_->get_mus_property ("direction");
142 if (to_dir (d) == UP)
144 up.push (fingerings_[i]);
147 down.push (fingerings_[i]);
152 fingerings_.sort (&Finger_tuple::compare);
153 if (to_boolean (get_property ("fingersHorizontal")))
155 up.push (fingerings_.pop());
156 down.push (fingerings_[0]);
163 int center = fingerings_.size() / 2;
164 down.concat (fingerings_.slice (0,center));
165 up.concat (fingerings_.slice (center, fingerings_.size()));
168 for (int i = 0; i < horiz.size(); i++)
170 Finger_tuple ft = horiz[i];
171 Grob* f = ft.fingering_;
172 f->set_parent (ft.head_, X_AXIS);
173 f->set_parent (ft.head_, Y_AXIS);
174 f->add_offset_callback (Self_alignment_interface::centered_on_parent_proc, Y_AXIS);
175 f->add_offset_callback (Self_alignment_interface::aligned_on_self_proc, Y_AXIS);
176 f->add_offset_callback (Side_position_interface::aligned_side_proc, X_AXIS);
177 f->set_grob_property( "direction", gh_int2scm (RIGHT));
181 int finger_prio = 200;
182 for (int i = 0; i < up.size(); i++)
184 Finger_tuple ft = up[i];
185 Grob* f = ft.fingering_;
186 f->set_parent (ft.head_, X_AXIS);
187 f->set_grob_property ("script-priority",
188 gh_int2scm (finger_prio + i));
189 f->add_offset_callback (Side_position_interface::aligned_side_proc, Y_AXIS);
190 f->add_offset_callback (Self_alignment_interface::centered_on_parent_proc, X_AXIS);
191 f->add_offset_callback (Self_alignment_interface::aligned_on_self_proc, X_AXIS);
193 f->set_grob_property ("direction", gh_int2scm (UP));
195 Side_position_interface::add_staff_support (f);
199 for (int i = 0; i < down.size(); i++)
201 Finger_tuple ft = down[i];
202 Grob* f = ft.fingering_;
203 f->set_parent (ft.head_, X_AXIS);
204 f->set_grob_property ("script-priority",
205 gh_int2scm (finger_prio + down.size() - i));
207 f->add_offset_callback (Self_alignment_interface::centered_on_parent_proc, X_AXIS);
208 f->add_offset_callback (Self_alignment_interface::aligned_on_self_proc, X_AXIS);
209 f->add_offset_callback (Side_position_interface::aligned_side_proc, Y_AXIS);
210 f->set_grob_property ("direction", gh_int2scm (DOWN));
211 Side_position_interface::add_staff_support (f);
217 New_fingering_engraver::stop_translation_timestep ()
219 if (!fingerings_.size ())
223 fingerings_.clear ();
227 New_fingering_engraver::New_fingering_engraver()
232 ENTER_DESCRIPTION(New_fingering_engraver,
233 /* descr */ "Create fingering-scripts for notes in a New Chord.",
234 /* creats*/ "Fingering",
235 /* accepts */ "text-script-event",
236 /* acks */ "rhythmic-head-interface stem-interface",
237 /* reads */ "fingersHorizontal",