lily/crescendo.cc

   1 /*
   2   crescendo.cc -- implement Crescendo
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "molecule.hh"
  10 #include "crescendo.hh"
  11 #include "lookup.hh"
  12 #include "dimensions.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   dyn_b_drul_[LEFT] = dyn_b_drul_[RIGHT] =false;
  21 }
  22
  23
  24
  25
  26 Molecule
  27 Crescendo::get_symbol () const
  28 {
  29   Real w_dim = extent (X_AXIS).length () - get_broken_left_end_align ();
  30   Real absdyn_dim = paper_l ()-> get_var ("crescendo_shorten");
  31   if (dyn_b_drul_[LEFT])
  32     {
  33       w_dim -= absdyn_dim;
  34     }
  35   if (dyn_b_drul_[RIGHT])
  36     {
  37       w_dim -= absdyn_dim;
  38     }
  39
  40   if (w_dim < 0)
  41     {
  42       warning (_ ("crescendo") + " " + _ ("too small"));
  43       w_dim = 0;
  44     }
  45
  46   Drul_array<bool> broken;
  47   Direction d = LEFT;
  48   do {
  49     Score_column* s = dynamic_cast<Score_column*>(spanned_drul_[d]); // UGH
  50     broken[d] = (!s->musical_b ());
  51   } while (flip (&d) != LEFT);
  52
  53
  54   bool continued = broken[Direction (-grow_dir_)];
  55   Real height = paper_l()->get_var ("crescendo_height");
  56   Real thick = paper_l ()->get_var ("crescendo_thickness");
  57
  58   return Molecule (lookup_l ()->hairpin (w_dim, height, thick, grow_dir_ < 0, continued));
  59 }
  60
  61 Molecule*
  62 Crescendo::do_brew_molecule_p () const
  63 {
  64   Molecule* m_p =0;
  65   Real absdyn_dim = paper_l ()-> get_var ("crescendo_shorten");
  66   Real x_off_dim =  get_broken_left_end_align ();
  67
  68   if (dyn_b_drul_[LEFT])
  69     x_off_dim += absdyn_dim;
  70
  71   m_p = new Molecule;
  72   Molecule s (get_symbol ());
  73   m_p->add_molecule (s);
  74   m_p->translate_axis (x_off_dim, X_AXIS);
  75   return m_p;
  76 }
  77
  78