lily/axis-group-element.cc

   1 /*
   2   axis-group-element.cc -- implement Axis_group_element
   3
   4   source file of the GNU LilyPond music typesetter
   5
   6   (c)  1997--1999 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "axis-group-element.hh"
  10 #include "dimension-cache.hh"
  11 #include "group-interface.hh"
  12
  13 Link_array<Score_element>
  14 Axis_group_element::get_extra_dependencies() const
  15 {
  16   Link_array<Score_element> e(elem_l_arr ());
  17   return e;
  18 }
  19
  20 Link_array<Score_element>
  21 Axis_group_element::elem_l_arr () const
  22 {
  23   return
  24     Group_interface__extract_elements (this, (Score_element*)0, "elements");
  25 }
  26
  27 Link_array<Score_element>
  28 Axis_group_element::get_children ()
  29 {
  30   Link_array<Score_element> childs;
  31   Link_array<Score_element> elems = elem_l_arr ();
  32
  33   for (int i=0; i < elems.size (); i++)
  34     {
  35       Score_element* e = elems[i];
  36       childs.push (e) ;
  37       Axis_group_element * axis_group= dynamic_cast <Axis_group_element *> (e);
  38       if (axis_group)
  39         childs.concat (axis_group->get_children ());
  40     }
  41
  42   return childs;
  43 }
  44
  45 Axis_group_element::Axis_group_element()
  46 {
  47   axes_[0] = (Axis)-1 ;
  48   axes_[1] = (Axis)-1 ;
  49
  50   set_elt_property ("elements", SCM_EOL);
  51   set_elt_property ("transparent", SCM_BOOL_T);
  52 }
  53
  54 void
  55 Axis_group_element::set_axes (Axis a1, Axis a2)
  56 {
  57   axes_[0] = a1 ;
  58   axes_[1] = a2 ;
  59   if (a1 != X_AXIS && a2 != X_AXIS)
  60     set_empty (X_AXIS);
  61   if (a1 != Y_AXIS && a2 != Y_AXIS)
  62     set_empty (Y_AXIS);
  63
  64   dim_cache_[a1]->set_callback(extent_callback);
  65   dim_cache_[a2]->set_callback (extent_callback);
  66 }
  67
  68 Interval
  69 Axis_group_element::extent_callback (Dimension_cache const *c)
  70 {
  71   Axis a = c->axis ();
  72   Axis_group_element * me
  73     = dynamic_cast<Axis_group_element*> (c->element_l ());
  74
  75   Interval r;
  76   for (SCM s = me->get_elt_property ("elements"); gh_pair_p (s); s = gh_cdr (s))
  77     {
  78       SCM e=gh_car (s);
  79       Score_element * se = SMOB_TO_TYPE (Score_element, e);
  80
  81       Interval dims = se->extent (a);
  82       if (!dims.empty_b ())
  83         r.unite (dims + se->relative_coordinate (me, a));
  84     }
  85
  86   return r;
  87 }
  88
  89
  90
  91 void
  92 Axis_group_element::add_element (Score_element *e)
  93 {
  94   used_b_ =true;
  95   e->used_b_ = true;
  96
  97   for (int i = 0; i < 2; i++)
  98     {
  99       if (!e->parent_l (axes_[i]))
 100         e->set_parent (this, axes_[i]);
 101     }
 102   Group_interface gi (this);
 103   gi.add_element (e);
 104 }
 105