lily/tuplet-spanner.cc

   1 /*
   2   plet-spanner.cc -- implement Tuplet_spanner
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Jan Nieuwenhuizen <janneke@gnu.org>
   7 */
   8
   9 #include "beam.hh"
  10 #include "box.hh"
  11 #include "debug.hh"
  12 #include "lookup.hh"
  13 #include "molecule.hh"
  14 #include "paper-column.hh"
  15 #include "paper-def.hh"
  16 #include "tuplet-spanner.hh"
  17 #include "stem.hh"
  18 #include "note-column.hh"
  19 #include "dimensions.hh"
  20 #include "group-interface.hh"
  21
  22
  23
  24 Tuplet_spanner::Tuplet_spanner ()
  25 {
  26   /*
  27     -> GUILE
  28    */
  29   parallel_beam_b_ = false;
  30   set_elt_property ("beams", SCM_EOL);
  31   set_elt_property ("columns", SCM_EOL);
  32 }
  33
  34 /*
  35   TODO.
  36  */
  37 Molecule*
  38 Tuplet_spanner::do_brew_molecule_p () const
  39 {
  40   Molecule* mol_p = new Molecule;
  41
  42   // Default behaviour: number always, bracket when no beam!
  43   bool bracket_visibility = !parallel_beam_b_;
  44   bool number_visibility = true;
  45   SCM visibility_sym =get_elt_property ("tuplet-visibility");
  46   if (visibility_sym != SCM_UNDEFINED)
  47     {
  48       /*
  49         ARG. Fixme.
  50        */
  51
  52       /* Property values:
  53          0       show nothing
  54          1       show number
  55          2       show (number and bracket)-if-no-beam
  56          3       show number, and bracket-if-no-beam
  57          4       show number, and bracket
  58       */
  59       int value = gh_scm2int ((visibility_sym));
  60       bracket_visibility = (value == 4 || (value > 1 && !parallel_beam_b_));
  61       number_visibility = (value > 2 || value == 1 ||
  62                            (value == 2 && !parallel_beam_b_));
  63     }
  64
  65   if (gh_pair_p (get_elt_property ("columns")))
  66     {
  67       Link_array<Note_column> column_arr=
  68         Group_interface__extract_elements (this, (Note_column*)0, "columns");
  69
  70       Real ncw = column_arr.top ()->extent(X_AXIS).length ();
  71       Real w = spanner_length () + ncw;
  72       Molecule num (lookup_l ()->text ("italic",
  73                                        number_str_, paper_l ()));
  74       num.align_to (X_AXIS, CENTER);
  75       num.translate_axis (w/2, X_AXIS);
  76       Real interline = paper_l ()->get_var ("interline");
  77       Real dy = column_arr.top ()->extent (Y_AXIS) [get_direction ()]
  78         - column_arr[0]->extent (Y_AXIS) [get_direction ()];
  79       num.align_to (Y_AXIS, CENTER);
  80       num.translate_axis (get_direction () * interline, Y_AXIS);
  81
  82       num.translate_axis (dy/2, Y_AXIS);
  83
  84       Real thick = paper_l ()->get_var ("tuplet_thick");
  85       if (bracket_visibility)
  86         {
  87           Real gap = paper_l () -> get_var ("tuplet_spanner_gap");
  88
  89           mol_p->add_molecule (lookup_l ()->tuplet_bracket (dy, w, thick, gap, interline, get_direction ()));
  90         }
  91
  92       if (number_visibility)
  93         {
  94           mol_p->add_molecule (num);
  95         }
  96       mol_p->translate_axis (get_direction () * interline, Y_AXIS);
  97     }
  98   return mol_p;
  99 }
 100
 101 void
 102 Tuplet_spanner::do_add_processing ()
 103 {
 104   if (gh_pair_p (get_elt_property ("columns")))
 105     {
 106       Link_array<Note_column> column_arr=
 107         Group_interface__extract_elements (this, (Note_column*)0, "columns");
 108
 109       set_bounds (LEFT, column_arr[0]);
 110       set_bounds (RIGHT, column_arr.top ());
 111     }
 112 }
 113
 114 void
 115 Tuplet_spanner::do_post_processing ()
 116 {
 117   Link_array<Note_column> column_arr=
 118     Group_interface__extract_elements (this, (Note_column*)0, "columns");
 119
 120
 121   if (column_arr.size())
 122     translate_axis (column_arr[0]->extent (Y_AXIS)[get_direction ()], Y_AXIS);
 123
 124
 125   if (scm_ilength (get_elt_property ("beams")) == 1)
 126     {
 127       SCM bs = get_elt_property ("beams");
 128       Score_element *b = unsmob_element (gh_car (bs));
 129       Beam * beam_l = dynamic_cast<Beam*> (b);
 130       if (!broken_b ()
 131           && spanned_drul_[LEFT]->column_l () == beam_l->spanned_drul_[LEFT]->column_l ()
 132           && spanned_drul_[RIGHT]->column_l () == beam_l->spanned_drul_[RIGHT]->column_l ())
 133         parallel_beam_b_ = true;
 134     }
 135 }
 136
 137
 138 Direction
 139 Tuplet_spanner::get_default_dir () const
 140 {
 141   Direction d = UP;
 142   SCM dir_sym =get_elt_property ("dir-forced");
 143   if (dir_sym != SCM_UNDEFINED) {
 144     d= (Direction) gh_scm2int (dir_sym);
 145     if (d != CENTER)
 146       return d;
 147   }
 148
 149   for (SCM s = get_elt_property ("columns"); gh_pair_p (s); s = gh_cdr (s))
 150     {
 151       Score_element * sc = unsmob_element (gh_car (s));
 152       Note_column * nc = dynamic_cast<Note_column*> (sc);
 153       if (nc->dir () < 0)
 154         {
 155           d = DOWN;
 156           break;
 157         }
 158     }
 159
 160   return d;
 161 }
 162
 163 void
 164 Tuplet_spanner::add_beam (Beam *b)
 165 {
 166   add_dependency (b);
 167   Group_interface gi (this, "beams");
 168   gi.add_element (b);
 169 }
 170
 171 void
 172 Tuplet_spanner::add_column (Note_column*n)
 173 {
 174   Group_interface gi (this, "columns");
 175   gi.add_element (n);
 176
 177   add_dependency (n);
 178 }
 179
 180