lily/directional-element-interface.cc

   1 /*
   2   directional-element.cc -- implement Directional_element
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1999--2001 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "directional-element-interface.hh"
  11
  12
  13 SCM Directional_element_interface::direction_sym;
  14
  15 static void
  16 init_functions ()
  17 {
  18   Directional_element_interface::direction_sym = scm_permanent_object (ly_symbol2scm ("direction"));
  19 }
  20 ADD_SCM_INIT_FUNC (Directional, init_functions);
  21
  22
  23 bool
  24 Directional_element_interface::has_interface (Grob*me)
  25 {
  26   return isdir_b (me->get_grob_property (direction_sym));
  27 }
  28
  29 Direction
  30 Directional_element_interface::get (Grob*me)
  31 {
  32   // return dir_;
  33   SCM d= me->get_grob_property (direction_sym);
  34   if (!isdir_b (d))
  35     return CENTER;
  36
  37   return to_dir (d);
  38 }
  39
  40 void
  41 Directional_element_interface::set (Grob*me, Direction d)
  42 {
  43   SCM sd = gh_int2scm (d);
  44
  45   if (me->get_grob_property (direction_sym) != sd)
  46     me->set_grob_property (direction_sym, sd);
  47 }