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 }
  20
  21 void
  22 Staff_symbol_referencer::do_substitute_element_pointer (Score_element *o, Score_element*n)
  23 {
  24   if (staff_sym_l_ == o)
  25     {
  26       staff_sym_l_ = dynamic_cast<Staff_symbol*> (n);
  27     }
  28 }
  29
  30 int
  31 Staff_symbol_referencer::lines_i () const
  32 {
  33   return (staff_sym_l_) ?  staff_sym_l_->no_lines_i_ : 5;
  34 }
  35
  36 void
  37 Staff_symbol_referencer::set_staff_symbol (Staff_symbol*s)
  38 {
  39   staff_sym_l_ =s;
  40   add_dependency (s);
  41 }
  42
  43 Staff_symbol*
  44 Staff_symbol_referencer::staff_symbol_l () const
  45 {
  46   return staff_sym_l_;
  47 }
  48
  49 Real
  50 Staff_symbol_referencer::staff_line_leading_f () const
  51 {
  52   return (staff_sym_l_) ? staff_sym_l_->staff_line_leading_f_ : paper_l ()->get_var ("interline");
  53 }
  54
  55 Real
  56 Staff_symbol_referencer::position_f () const
  57 {
  58   if (!staff_sym_l_ )
  59     return 0;
  60
  61   Graphical_element * c = common_refpoint (staff_sym_l_, Y_AXIS);
  62   Real y = relative_coordinate (c, Y_AXIS) - staff_sym_l_->relative_coordinate (c, Y_AXIS);
  63
  64   return 2.0 * y / staff_line_leading_f ();
  65 }
  66