2 note-column.cc -- implement Note_column
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
8 #include <math.h> // ceil
10 #include "axis-group-interface.hh"
11 #include "dot-column.hh"
12 #include "note-column.hh"
14 #include "note-head.hh"
18 #include "paper-def.hh"
19 #include "group-interface.hh"
20 #include "staff-symbol-referencer.hh"
23 Note_column::rest_b () const
25 SCM r = get_elt_pointer ("rests");
31 Note_column::shift_compare (Note_column *const &p1, Note_column*const&p2)
33 SCM s1 = p1->get_elt_property ("horizontal-shift");
34 SCM s2 = p2->get_elt_property ("horizontal-shift");
36 int h1 = (gh_number_p (s1))? gh_scm2int (s1) :0;
37 int h2 = (gh_number_p (s2)) ? gh_scm2int (s2):0;
41 Note_column::Note_column( SCM s)
44 set_elt_pointer ("rests", SCM_EOL);
45 set_elt_pointer ("note-heads", SCM_EOL);
46 Axis_group_interface (this).set_interface ();
47 Axis_group_interface (this).set_axes (X_AXIS, Y_AXIS);
48 Group_interface (this, "interfaces").add_thing (ly_symbol2scm ("Note_column"));
52 Note_column::stem_l () const
54 SCM s = get_elt_pointer ("stem");
55 return dynamic_cast<Stem*> (unsmob_element (s));
61 Note_column::head_positions_interval() const
67 SCM h = get_elt_pointer ("note-heads");
68 for (; gh_pair_p (h); h = gh_cdr (h))
70 Score_element *se = unsmob_element (gh_car (h));
71 Staff_symbol_referencer_interface si (se);
73 int j = int (si.position_f ());
74 iv.unite (Slice (j,j));
80 Note_column::dir () const
83 return stem_l ()->get_direction ();
84 else if (gh_pair_p (get_elt_pointer ("note-heads")))
85 return (Direction)sign (head_positions_interval().center ());
87 programming_error ("Note column without heads and stem!");
93 Note_column::set_stem (Stem * stem_l)
95 set_elt_pointer ("stem", stem_l->self_scm_);
97 add_dependency (stem_l);
98 Axis_group_interface (this).add_element (stem_l);
104 Note_column::add_head (Rhythmic_head *h)
106 if (Rest*r=dynamic_cast<Rest *> (h))
108 Pointer_group_interface gi (this, "rests");
111 if (Note_head *nh=dynamic_cast<Note_head *> (h))
113 Pointer_group_interface gi (this, "note-heads");
116 Axis_group_interface (this).add_element (h);
120 translate the rest symbols vertically by amount DY_I.
123 Note_column::translate_rests (int dy_i)
125 SCM s = get_elt_pointer ("rests");
126 for (; gh_pair_p (s); s = gh_cdr (s))
128 Score_element * se = unsmob_element (gh_car (s));
129 Staff_symbol_referencer_interface si (se);
131 se->translate_axis (dy_i * si.staff_space ()/2.0, Y_AXIS);
137 Note_column::set_dotcol (Dot_column *d)
139 Axis_group_interface (this).add_element (d);
144 handle rest under beam (do_post: beams are calculated now)
145 what about combination of collisions and rest under beam.
149 rest -> stem -> beam -> interpolate_y_position ()
152 GLUE_SCORE_ELEMENT(Note_column,after_line_breaking);
154 Note_column::member_after_line_breaking ()
156 if (!stem_l () || !rest_b ())
157 return SCM_UNDEFINED;
159 Beam * b = stem_l ()->beam_l ();
160 if (!b || !b->visible_stem_count ())
161 return SCM_UNDEFINED;
163 /* ugh. Should be done by beam.
164 (what? should be done --jcn)
165 scary too?: height is calculated during post_processing
170 SCM s = b->get_elt_property ("height");
172 beam_dy = gh_scm2double (s);
174 s = b->get_elt_property ("y-position");
176 beam_y = gh_scm2double (s);
179 Real x0 = b->first_visible_stem ()->relative_coordinate (0, X_AXIS);
180 Real dx = b->last_visible_stem ()->relative_coordinate (0, X_AXIS) - x0;
181 Real dydx = beam_dy && dx ? beam_dy/dx : 0;
183 Direction d = stem_l ()->get_direction ();
184 Real beamy = (stem_l ()->relative_coordinate (0, X_AXIS) - x0) * dydx + beam_y;
186 s = get_elt_pointer ("rests");
187 Score_element * se = unsmob_element (gh_car (s));
188 Staff_symbol_referencer_interface si (se);
190 Real staff_space = si.staff_space ();
191 Real rest_dim = extent (Y_AXIS)[d]*2.0 /staff_space ;
194 = paper_l ()->get_var ("restcollision_minimum_beamdist") ;
196 minimum_dist + -d * (beamy - rest_dim) >? 0;
198 int stafflines = si.line_count ();
200 // move discretely by half spaces.
201 int discrete_dist = int (ceil (dist ));
203 // move by whole spaces inside the staff.
204 if (discrete_dist < stafflines+1)
205 discrete_dist = int (ceil (discrete_dist / 2.0)* 2.0);
207 translate_rests (-d * discrete_dist);
209 return SCM_UNDEFINED;
214 Note_column::rest_dim () const
217 SCM s = get_elt_pointer ("rests");
218 for (; gh_pair_p (s); s = gh_cdr (s))
220 Score_element * sc = unsmob_element ( gh_car (s));
221 restdim.unite (sc->extent (Y_AXIS));
228 Note_column::first_head () const
230 Stem * st = stem_l ();
231 return st? st->first_head (): 0;