lily/separation-item.cc

   1 /*
   2   single-malt-grouping-item.cc --  implement Separation_item
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c) 1998--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7
   8  */
   9
  10 #include "separation-item.hh"
  11 #include "paper-column.hh"
  12 #include "debug.hh"
  13 #include "group-interface.hh"
  14
  15 void
  16 Separation_item::set_interface (Score_element*s)
  17 {
  18   s->set_elt_property ("elements", SCM_EOL);
  19   s->set_extent_callback (0, X_AXIS);
  20   s->set_extent_callback (0,  Y_AXIS);
  21 }
  22
  23 void
  24 Separation_item::add_item (Score_element*s,Item* i)
  25 {
  26   assert (i);
  27   Pointer_group_interface (s).add_element (i);
  28   s->add_dependency (i);
  29 }
  30
  31 Interval
  32 Separation_item::my_width (Score_element *me)
  33 {
  34   Item *item = dynamic_cast<Item*> (me);
  35   Paper_column * pc = item->column_l ();
  36   Interval w;
  37
  38   for (SCM s =  me->get_elt_property ("elements"); gh_pair_p (s); s = gh_cdr (s))
  39     {
  40       SCM elt = gh_car (s);
  41       if (!SMOB_IS_TYPE_B(Score_element, elt))
  42         continue;
  43
  44       Item *il = dynamic_cast<Item*> (unsmob_element (elt));
  45       if (pc != il->column_l ())
  46         {
  47           /* this shouldn't happen, but let's continue anyway. */
  48           programming_error (_("Separation_item:  I've been drinking too much"));
  49           continue;             /*UGH UGH*/
  50         }
  51
  52       if (to_boolean (il->get_elt_property ("no-spacing-rods")))
  53         {
  54           continue;
  55         }
  56
  57       Interval iv (il->extent (X_AXIS));
  58       if (!iv.empty_b ())
  59         {
  60           Real off = il->relative_coordinate (pc, X_AXIS);
  61           w.unite  (iv + off);
  62         }
  63     }
  64
  65   return w;
  66  // add this->offset_ ? this-> relative_coordinate ()?
  67 }
  68
  69
  70