2 stem.cc -- implement Stem
4 source file of the GNU LilyPond music typesetter
6 (c) 1996,1997 Han-Wen Nienhuys <hanwen@stack.nl>
12 #include "paper-def.hh"
13 #include "note-head.hh"
15 #include "molecule.hh"
22 IMPLEMENT_IS_TYPE_B1 (Stem,Item);
34 stem_bottom_f_ = stem_top_f_ = 0;
43 Stem::min_head_i () const
46 for (int i =0; i < head_l_arr_.size (); i++)
47 m = m <? head_l_arr_[i]->position_i_;
52 Stem::max_head_i () const
55 for (int i =0; i < head_l_arr_.size (); i++)
56 m = m >? head_l_arr_[i]->position_i_;
62 Stem::do_print () const
65 DOUT << "flag "<< flag_i_ << " print_flag? " << !(bool)beam_l_ << "abbrev_flag_i_" << abbrev_flag_i_;
70 Stem::stem_length_f () const
72 return stem_top_f_-stem_bottom_f_ ;
76 Stem::stem_start_f () const
78 return (dir_ < 0)? stem_top_f_ : stem_bottom_f_;
82 Stem::stem_end_f () const
84 return (dir_ < 0)? stem_bottom_f_ : stem_top_f_;
89 Stem::set_stemend (Real se)
92 if (! ((dir_ > 0 && se >= max_head_i ()) ||
93 (se <= min_head_i () && dir_ <0)))
94 warning ("Weird stem size; check for narrow beams");
96 stem_top_f_ = (dir_ < 0) ? max_head_i () : se;
97 stem_bottom_f_ = (dir_ < 0) ? se : min_head_i ();
101 Stem::add (Note_head *n)
103 n->add_dependency (this);
105 rest_l_arr_.push (n);
107 head_l_arr_.push (n);
110 else if (1) //why different? (n->balltype_i_)
111 head_l_arr_.push (n);
113 whole_l_arr_.push (n);
118 Stem::invisible_b () const
120 return !head_l_arr_.size();
123 // if dir_ is set we return fake values.
126 Stem::get_center_distance_from_top ()
129 return (dir_ > 0) ? 0 : 1;
131 int staff_center = staff_size_i_ / 2;
132 int max = max_head_i () - staff_center;
136 // if dir_ is set we return fake values.
138 Stem::get_center_distance_from_bottom ()
141 return (dir_ > 0) ? 1 : 0;
143 int staff_center = staff_size_i_ / 2;
144 int min = staff_center - min_head_i ();
149 Stem::get_default_dir ()
153 return (get_center_distance_from_top () >=
154 get_center_distance_from_bottom ()) ?
155 (Direction)-1 : (Direction)1;
160 Stem::set_default_dir ()
162 dir_ = get_default_dir ();
166 Stem::set_default_stemlen ()
171 // ugh... how about non 5-line staffs?
172 bool on_ledger_line_b = ((max_head_i () < -2 && dir_ == 1)
173 // || (min_head_i () > staff_size_i_ && dir_ == -1));
174 || (min_head_i () > staff_size_i_ + 3 && dir_ == -1));
175 if (on_ledger_line_b)
177 set_stemend (staff_size_i_ / 2 - 1);
181 Real dy = paper ()->interbeam_f ();
183 // ugh, should get nice *rule* for this
184 if (abbrev_flag_i_ > 1)
185 len += (abbrev_flag_i_ - 1)* dy / 2;
186 set_stemend ((dir_ > 0) ? max_head_i () + len :
187 min_head_i () - len);
192 Stem::set_default_extents ()
194 if (!stem_length_f ())
195 set_default_stemlen ();
197 set_stemend ((dir_< 0) ?
198 max_head_i ()-stem_length_f (): min_head_i () +stem_length_f ());
200 stem_xoffset_f_ = paper ()->note_width ()-paper ()->rule_thickness ();
209 move into note_column.cc
213 Stem::set_noteheads ()
215 if (!head_l_arr_.size ())
217 head_l_arr_.sort (Note_head::compare);
219 head_l_arr_.reverse ();
221 head_l_arr_[0]->extremal_i_ = -1;
222 head_l_arr_.top ()->extremal_i_ = 1;
224 int lastpos = head_l_arr_[0]->position_i_;
225 for (int i=1; i < head_l_arr_.size (); i ++)
227 int dy =abs (lastpos- head_l_arr_[i]->position_i_);
232 head_l_arr_[i]->x_dir_ = (stem_xoffset_f_>0) ? UP:DOWN;
237 lastpos = head_l_arr_[i]->position_i_;
242 Stem::do_pre_processing ()
244 if (stem_bottom_f_== stem_top_f_)
245 set_default_extents ();
247 flag_i_ = dir_*abs (flag_i_);
248 transparent_b_ = invisible_b ();
249 empty_b_ = invisible_b ();
253 Stem::do_width () const
255 if (beam_l_ || abs (flag_i_) <= 4)
256 return Interval (0,0); // TODO!
257 Paper_def*p= paper ();
258 Interval r (p->lookup_l ()->flag (flag_i_).dim.x ());
264 Stem::abbrev_mol () const
266 Real dy = paper ()->interbeam_f ();
267 Real w = 1.5 * paper ()->lookup_l ()->ball (2).dim.x ().length ();
268 Real beamdy = paper ()->interline_f () / 2;
271 Real slope = paper ()->internote_f () / 4;
275 slope = 2 * beam_l_->slope;
276 // ugh, rather calc from Abbreviation_req
277 beams_i = beams_right_i_ >? beams_left_i_;
279 paper()->lookup_l ()->beam (slope, 20 PT);
282 Atom a (paper ()->lookup_l ()->beam (slope, w));
283 a.translate (Offset(- w / 2, stem_end_f () - (w / 2 * slope)));
286 a.translate (dy + beamdy - dir_ * dy, Y_AXIS);
288 a.translate (2 * beamdy - dir_ * (beamdy - dy), Y_AXIS);
290 for (int i = 0; i < abbrev_flag_i_; i++)
293 b.translate (-dir_ * dy * (beams_i + i), Y_AXIS);
301 Stem::brew_molecule_p () const
303 Real bot = stem_bottom_f_;
304 Real top = stem_top_f_;
308 Paper_def *p =paper ();
310 Real dy = p->internote_f ();
311 Symbol ss =p->lookup_l ()->stem (bot*dy,top*dy);
313 Molecule* mol_p = new Molecule;
314 if (head_l_arr_.size() && head_l_arr_[0]->balltype_i_)
315 mol_p->add (Atom (ss));
317 if (!beam_l_ && abs (flag_i_) > 4)
319 Symbol fl = p->lookup_l ()->flag (flag_i_);
322 mol_p->add_bottom (m);
324 else if (flag_i_ > 4)
330 assert (!abbrev_flag_i_);
334 mol_p->add (abbrev_mol ());
336 mol_p->translate (stem_xoffset_f_, X_AXIS);
341 Stem::hpos_f () const
343 return Item::hpos_f () + stem_xoffset_f_;
348 Stem::do_substitute_dependency (Score_elem*o,Score_elem*n)
350 Item * o_l = o->item ();
351 Item * n_l = n? n->item ():0;
352 // whole_l_arr_.substitute ((Note_head*)o_l, (Note_head*)n_l);
353 head_l_arr_.substitute ((Note_head*)o_l, (Note_head*)n_l);
354 rest_l_arr_.substitute ((Note_head*)o_l, (Note_head*)n_l);