lily/semi-tie.cc

   1 /*
   2   semi-tie.cc -- implement Semi_tie
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 2005--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
   7
   8 */
   9
  10 #include "semi-tie-column.hh"
  11 #include "semi-tie.hh"
  12 #include "directional-element-interface.hh"
  13 #include "grob.hh"
  14 #include "tie.hh"
  15 #include "warn.hh"
  16 #include "staff-symbol-referencer.hh"
  17
  18 ADD_INTERFACE(Semi_tie,
  19
  20               "semi-tie-interface",
  21
  22               "A tie which is only on one side connected to note heads. ",
  23
  24               /* properties */
  25               "control-points "
  26               "direction "
  27               "details "
  28               "note-head "
  29               "thickness "
  30               );
  31
  32 MAKE_SCHEME_CALLBACK(Semi_tie, calc_control_points, 1)
  33 SCM
  34 Semi_tie::calc_control_points (SCM smob)
  35 {
  36   Grob *me = unsmob_grob (smob);
  37   if (Semi_tie_column::has_interface (me->get_parent (Y_AXIS)))
  38     {
  39       me->get_parent (Y_AXIS)->get_property ("positioning-done");
  40     }
  41   else
  42     {
  43       programming_error ("lv tie without Semi_tie_column. Killing lv tie.");
  44       me->suicide ();
  45     }
  46
  47   return SCM_UNSPECIFIED;
  48 }
  49
  50 MAKE_SCHEME_CALLBACK(Semi_tie, calc_direction, 1)
  51 SCM
  52 Semi_tie::calc_direction (SCM smob)
  53 {
  54   Grob *me = unsmob_grob (smob);
  55   if (Semi_tie_column::has_interface (me->get_parent (Y_AXIS)))
  56     me->get_parent (Y_AXIS)->get_property("positioning-done");
  57   else
  58     {
  59       programming_error ("lv tie without Semi_tie_column");
  60       set_grob_direction (me, UP);
  61     }
  62
  63   return SCM_UNSPECIFIED;
  64 }
  65
  66 int
  67 Semi_tie::get_position (Grob *me)
  68 {
  69   Grob *h = unsmob_grob (me->get_object ("note-head"));
  70   return (int) rint (Staff_symbol_referencer::get_position (h));
  71 }
  72
  73 bool
  74 Semi_tie::less (Grob *const &s1,
  75                 Grob *const &s2)
  76 {
  77   return get_position (s1) < get_position (s2);
  78 }
  79