lily/vertical-align-elem.cc

   1 /*
   2   vertical-align-item.cc -- implement Vertical_align_elem
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1998 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9 #include "vertical-align-elem.hh"
  10 #include "interval.hh"
  11
  12 void
  13 Vertical_align_element::add (Score_elem*el_l)
  14 {
  15   assert (! contains_b (el_l));
  16   elem_l_arr_.push (el_l);
  17   add_dependency (el_l);
  18 }
  19
  20 void
  21 Vertical_align_element::do_substitute_dependency (Score_elem*o,Score_elem*n)
  22 {
  23   int i;
  24   while ((i = elem_l_arr_.find_i (o))>=0)
  25     if (n)
  26       elem_l_arr_[i] = n;
  27     else
  28       elem_l_arr_.del (i);
  29 }
  30
  31 /**
  32   Align elements top to bottom.
  33   The first element has its top at y =0.0 afterwards
  34
  35   TODO configurable, like Horizontal_align_item
  36  */
  37 void
  38 Vertical_align_element::do_post_processing()
  39 {
  40   Array<Interval> dims;
  41   for (int i=0; i < elem_l_arr_.size(); i++)
  42     {
  43       Interval y = elem_l_arr_[i]->height() ;
  44       if (y.empty_b())
  45         y = Interval (0,0);
  46
  47       dims.push (y);
  48     }
  49
  50   Real where_f=0;
  51   for (int i=0 ;  i < elem_l_arr_.size(); i++)
  52     {
  53       elem_l_arr_[i]->translate_axis (- dims[i][1] - where_f, Y_AXIS);
  54       where_f += dims[i].length();
  55     }
  56 }
  57
  58 bool
  59 Vertical_align_element::contains_b (Score_elem const *e) const
  60 {
  61   return elem_l_arr_.find_l (e);
  62 }
  63
  64 Vertical_align_element::Vertical_align_element()
  65 {
  66   transparent_b_ = true;
  67   set_empty (true);
  68 }
  69
  70
  71 IMPLEMENT_IS_TYPE_B1(Vertical_align_element, Score_elem);
  72