lily/crescendo.cc

   1 /*
   2   crescendo.cc -- implement Crescendo
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "molecule.hh"
  10 #include "dimen.hh"
  11 #include "crescendo.hh"
  12 #include "lookup.hh"
  13 #include "paper-def.hh"
  14 #include "debug.hh"
  15 #include "score-column.hh"
  16
  17 Crescendo::Crescendo()
  18 {
  19   grow_dir_ =0;
  20   dir_ = DOWN;
  21   dyn_b_drul_[LEFT] = dyn_b_drul_[RIGHT] =false;
  22 }
  23
  24 Interval
  25 Crescendo::symbol_height() const
  26 {
  27   return get_symbol().dim_[Y_AXIS];
  28 }
  29
  30 static Real absdyn_dim = 10 PT; // ugh
  31
  32 Atom
  33 Crescendo::get_symbol() const
  34 {
  35   Real w_dim = width().length ();
  36   if (dyn_b_drul_[LEFT])
  37     {
  38       w_dim -= absdyn_dim;
  39     }
  40   if (dyn_b_drul_[RIGHT])
  41     {
  42       w_dim -= absdyn_dim;
  43     }
  44
  45   if (w_dim < 0)
  46     {
  47       warning (_("Crescendo too small"));
  48       w_dim = 0;
  49     }
  50
  51   Drul_array<bool> broken;
  52   Direction d = LEFT;
  53   do {
  54     Score_column* s = (Score_column* )spanned_drul_[d] ; // UGH
  55     broken[d] = (!s->musical_b());
  56   } while (flip(&d) != LEFT);
  57
  58
  59   bool continued = broken[(Direction)-grow_dir_];
  60   return Atom (paper()->lookup_l ()->hairpin (w_dim, grow_dir_ < 0, continued));
  61 }
  62
  63 Molecule*
  64 Crescendo::brew_molecule_p() const
  65 {
  66   Molecule* m_p =0;
  67   Real x_off_dim=0.0;
  68   if (dyn_b_drul_[LEFT])
  69     x_off_dim += absdyn_dim;
  70
  71   m_p = new Molecule;
  72   Atom s (get_symbol());
  73   m_p->add (Atom (s));
  74   m_p->translate (Offset (x_off_dim, y_));
  75   return m_p;
  76 }
  77
  78
  79 IMPLEMENT_IS_TYPE_B1(Crescendo,Spanner);