lily/single-malt-grouping-item.cc

   1 /*
   2   single-malt-grouping-item.cc --  implement Single_malt_grouping_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 "single-malt-grouping-item.hh"
  11 #include "paper-column.hh"
  12 #include "debug.hh"
  13 #include "group-interface.hh"
  14
  15 Single_malt_grouping_item ::Single_malt_grouping_item(SCM s)
  16   : Item (s)
  17 {
  18   set_elt_pointer ("elements", SCM_EOL);
  19
  20   // this is weird! , but needed!
  21   set_extent_callback (0, X_AXIS);
  22   set_extent_callback (0,  Y_AXIS);
  23
  24 }
  25
  26 void
  27 Single_malt_grouping_item::add_item (Item* i)
  28 {
  29   assert (i);
  30   Pointer_group_interface (this).add_element (i);
  31
  32   add_dependency (i);
  33 }
  34
  35 Interval
  36 Single_malt_grouping_item::my_width () const
  37 {
  38   Paper_column * pc = column_l ();
  39   Interval w;
  40
  41   for (SCM s = get_elt_pointer ("elements"); gh_pair_p (s); s = gh_cdr (s))
  42     {
  43       SCM elt = gh_car (s);
  44       if (!SMOB_IS_TYPE_B(Score_element, elt))
  45         continue;
  46
  47       Item *il = dynamic_cast<Item*> (SMOB_TO_TYPE (Score_element, elt));
  48       if (pc != il->column_l ())
  49         {
  50           /* this shouldn't happen, but let's continue anyway. */
  51           programming_error (_("Single_malt_grouping_item:  I've been drinking too much"));
  52           continue;             /*UGH UGH*/
  53         }
  54
  55       if (to_boolean (il->get_elt_property ("no-spacing-rods")))
  56         {
  57           continue;
  58         }
  59
  60       Interval iv (il->extent (X_AXIS));
  61       if (!iv.empty_b ())
  62         {
  63           Real off = il->relative_coordinate (pc, X_AXIS);
  64           w.unite  (iv + off);
  65         }
  66     }
  67
  68   return w;
  69  // add this->offset_ ? this-> relative_coordinate ()?
  70 }
  71
  72
  73