2 multi-measure-rest.cc -- implement Multi_measure_rest
4 source file of the GNU LilyPond music typesetter
6 (c) 1998--2000 Jan Nieuwenhuizen <janneke@gnu.org>
10 #include "multi-measure-rest.hh"
12 #include "paper-def.hh"
13 #include "paper-column.hh" // urg
14 #include "font-interface.hh"
16 #include "molecule.hh"
18 #include "group-interface.hh"
20 #include "staff-symbol-referencer.hh"
21 #include "text-item.hh"
24 Multi_measure_rest::set_interface (Grob*me)
26 me->set_interface (ly_symbol2scm ("multi-measure-rest-interface"));
30 Multi_measure_rest::has_interface (Grob*me)
32 return me->has_interface (ly_symbol2scm ("multi-measure-rest-interface"));
37 * variable-sized multi-measure rest symbol: |====| ??
39 MAKE_SCHEME_CALLBACK(Multi_measure_rest,brew_molecule,1);
41 Multi_measure_rest::brew_molecule (SCM smob)
43 Grob *me = unsmob_grob (smob);
44 Spanner * sp = dynamic_cast<Spanner*> (me);
46 SCM alist_chain = Font_interface::font_alist_chain (me);
50 Font_interface::add_style (me, ly_symbol2scm ("mmrest-symbol"),
54 = Font_interface::get_font (me,style_chain);
56 Real staff_space = Staff_symbol_referencer::staff_space (me);
62 Item * col = sp->get_bound (d)->column_l ();
64 Interval coldim = col->extent (0, X_AXIS);
66 sp_iv[d] = coldim[-d] ;
68 while ((flip (&d)) != LEFT);
72 Real rx = sp->get_bound (LEFT)->relative_coordinate (0, X_AXIS);
74 we gotta stay clear of sp_iv, so move a bit to the right if
77 x_off += (sp_iv[LEFT] - rx) >? 0;
82 x_off += sp_iv.length ()/ 2;
88 SCM m (me->get_grob_property ("measure-count"));
91 measures = gh_scm2int (m);
95 SCM limit = me->get_grob_property ("expand-limit");
96 if (measures <= gh_scm2int (limit))
99 Build a rest from smaller parts. Distances inbetween are
100 really variable, see Wanske pp. 125 */
122 Real pad = s.empty_b ()
123 ? 0.0 : gh_scm2double (me->get_grob_property ("padding")) * staff_space;
125 Molecule r (musfont->find_by_name ("rests-" + to_str (k)));
127 r.translate_axis (staff_space, Y_AXIS);
129 s.add_at_edge (X_AXIS, RIGHT, r, pad);
133 s.align_to (X_AXIS, CENTER);
137 String idx = ("rests-") + to_str (-4);
138 s = musfont->find_by_name (idx);
141 mol.add_molecule (s);
145 Molecule s = Text_item::text2molecule (me,
146 ly_str02scm (to_str (measures).ch_C ()),
148 s.align_to (X_AXIS, CENTER);
149 s.translate_axis (3.0 * staff_space, Y_AXIS);
150 mol.add_molecule (s);
152 mol.translate_axis (x_off, X_AXIS);
153 return mol.smobbed_copy();
157 UGH. JUNKME elt prop "columns" isn't really needed.
160 Multi_measure_rest::add_column (Grob*me,Item* c)
162 Pointer_group_interface::add_element (me, "columns",c);
164 add_bound_item (dynamic_cast<Spanner*> (me),c);
168 MAKE_SCHEME_CALLBACK (Multi_measure_rest, set_spacing_rods,1);
171 Multi_measure_rest::set_spacing_rods (SCM smob)
173 Grob*me = unsmob_grob (smob);
175 Spanner*sp = dynamic_cast<Spanner*> (me);
176 if (!(sp->get_bound (LEFT) && sp->get_bound (RIGHT)))
178 programming_error ("Multi_measure_rest::get_rods (): I am not spanned!");
179 return SCM_UNSPECIFIED;
182 Item * l = sp->get_bound (LEFT)->column_l ();
183 Item * r = sp->get_bound (RIGHT)->column_l ();
184 Item * lb = l->find_prebroken_piece (RIGHT);
185 Item * rb = r->find_prebroken_piece (LEFT);
187 Item* combinations[4][2]={{l,r}, {lb,r}, {l,rb},{lb,rb}};
188 Real staff_space = Staff_symbol_referencer::staff_space (me);
189 for (int i=0; i < 4; i++)
191 Item * l = combinations[i][0];
192 Item *r = combinations[i][1];
198 rod.item_l_drul_[LEFT] = l;
199 rod.item_l_drul_[RIGHT] = r;
202 should do something more advanced.
204 rod.distance_f_ = l->extent (l, X_AXIS)[BIGGER] - r->extent (r, X_AXIS)[SMALLER]
205 + gh_scm2double (me->get_grob_property ("minimum-width")) * staff_space;
209 return SCM_UNSPECIFIED;