lily/staff-symbol-referencer.cc

   1 /*
   2   staff-symbol-referencer.cc -- implement Staff_symbol_referencer
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7  */
   8
   9 #include <math.h>
  10
  11 #include "staff-symbol-referencer.hh"
  12 #include "staff-symbol.hh"
  13 #include "paper-def.hh"
  14 #include "dimension-cache.hh"
  15
  16 Staff_symbol_referencer::Staff_symbol_referencer ()
  17 {
  18   staff_sym_l_ =0;
  19   position_i_ =0;
  20 }
  21
  22 void
  23 Staff_symbol_referencer::do_substitute_element_pointer (Score_element *o, Score_element*n)
  24 {
  25   if (staff_sym_l_ == o)
  26     {
  27       staff_sym_l_ = dynamic_cast<Staff_symbol*> (n);
  28     }
  29 }
  30
  31 int
  32 Staff_symbol_referencer::lines_i () const
  33 {
  34   return (staff_sym_l_) ?  staff_sym_l_->no_lines_i_ : 5;
  35 }
  36
  37 void
  38 Staff_symbol_referencer::set_staff_symbol (Staff_symbol*s)
  39 {
  40   staff_sym_l_ =s;
  41   add_dependency (s);
  42 }
  43
  44 Staff_symbol*
  45 Staff_symbol_referencer::staff_symbol_l () const
  46 {
  47   return staff_sym_l_;
  48 }
  49
  50 Real
  51 Staff_symbol_referencer::staff_line_leading_f () const
  52 {
  53   return (staff_sym_l_) ? staff_sym_l_->staff_line_leading_f_ : paper_l ()->get_var ("interline");
  54 }
  55
  56 Real
  57 Staff_symbol_referencer::position_f () const
  58 {
  59   Real p = position_i_;
  60   if (staff_sym_l_ )
  61     {
  62       Graphical_element * c = common_refpoint (staff_sym_l_, Y_AXIS);
  63       Real y = relative_coordinate (c, Y_AXIS) - staff_sym_l_->relative_coordinate (c, Y_AXIS);
  64
  65       p += 2.0 * y / staff_line_leading_f ();
  66     }
  67   return  p;
  68 }
  69
  70
  71
  72 void
  73 Staff_symbol_referencer::do_pre_processing ()
  74 {
  75   translate_axis (position_i_ * staff_line_leading_f () /2.0, Y_AXIS);
  76   position_i_ =0;
  77 }
  78
  79
  80 void
  81 Staff_symbol_referencer::set_position (int p)
  82 {
  83   /*
  84     UGH. Use position_f() as well.
  85    */
  86   position_i_ =   p;
  87
  88 }