lily/dots.cc

   1 /*
   2   dots.cc -- implement Dots
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "dots.hh"
  10 #include "item.hh"
  11 #include "molecule.hh"
  12 #include "paper-def.hh"
  13 #include "lookup.hh"
  14 #include "staff-symbol-referencer.hh"
  15 #include "directional-element-interface.hh"
  16
  17
  18 Real
  19 Dots::quantised_position_callback (Score_element * me, Axis a)
  20 {
  21   assert (a == Y_AXIS);
  22
  23   SCM d= me->get_elt_property ("dot-count");
  24   if (gh_number_p (d) && gh_scm2int (d))
  25     {
  26       if (!Directional_element_interface (me).get ())
  27         Directional_element_interface (me).set (UP);
  28
  29
  30       int pos = int (Staff_symbol_referencer::position_f (me));
  31       if (!(pos % 2))
  32         return Staff_symbol_referencer::staff_space (me) / 2.0 * Directional_element_interface (me).get ();
  33     }
  34
  35   return  0.0;
  36 }
  37
  38
  39 MAKE_SCHEME_CALLBACK(Dots,brew_molecule);
  40 SCM
  41 Dots::brew_molecule (SCM d)
  42 {
  43   Score_element *sc = unsmob_element (d);
  44   Molecule mol (sc->lookup_l ()->blank (Box (Interval (0,0),
  45                                          Interval (0,0))));
  46
  47   SCM c = sc->get_elt_property ("dot-count");
  48   if (gh_number_p (c))
  49     {
  50       Molecule d = sc->lookup_l ()->afm_find (String ("dots-dot"));
  51
  52       Real dw = d.extent (X_AXIS).length ();
  53       d.translate_axis (-dw, X_AXIS);
  54
  55
  56       for (int i = gh_scm2int (c); i--; )
  57         {
  58           d.translate_axis (2*dw,X_AXIS);
  59           mol.add_molecule (d);
  60         }
  61     }
  62   return mol.create_scheme ();
  63 }
  64
  65
  66