source/lineararrangement.cpp

   1 #include "lineararrangement.h"
   2
   3 namespace Msp {
   4 namespace GLtk {
   5
   6 LinearArrangement::LinearArrangement(Layout &l, Side p):
   7         Arrangement(l),
   8         primary(p),
   9         opposite(static_cast<Side>((primary+2)%4)),
  10         first(true),
  11         split_here(false),
  12         gravity(opposite),
  13         internal_aligned(false)
  14 { }
  15
  16 void LinearArrangement::split()
  17 {
  18         if(gravity==primary)
  19                 throw arrangement_error("already split");
  20
  21         split_here = true;
  22         gravity = primary;
  23 }
  24
  25 void LinearArrangement::expand()
  26 {
  27         if(gravity==primary)
  28                 throw arrangement_error("already split");
  29         if(edges[primary].empty())
  30                 throw arrangement_error("no widgets");
  31
  32         add_constraint(*edges[primary].widgets.front(), get_align_constraint(primary), primary);
  33         layout.set_expand(*edges[primary].widgets.front(), (primary==LEFT || primary==RIGHT), (primary==TOP || primary==BOTTOM));
  34         edges[primary].align();
  35         gravity = primary;
  36 }
  37
  38 void LinearArrangement::process_widget(Widget &wdg, Side side, bool aligned)
  39 {
  40         if(side==opposite)
  41         {
  42                 bool snug = (internal_aligned && aligned && !split_here);
  43                 add_constraint(wdg, get_order_constraint(primary, !snug), primary);
  44                 if(first)
  45                         edges[side].add(wdg, (aligned && gravity==opposite));
  46         }
  47         else if(side==primary)
  48                 next.add(wdg, aligned);
  49         else
  50         {
  51                 if(edges[side].aligned && aligned)
  52                         add_constraint(wdg, get_align_constraint(side), side);
  53                 edges[side].add(wdg, aligned);
  54         }
  55 }
  56
  57 void LinearArrangement::finish_slot()
  58 {
  59         internal_aligned = next.aligned;
  60         if(gravity!=primary)
  61                 next.aligned = false;
  62         edges[primary] = next;
  63         next.clear();
  64         split_here = false;
  65         first = false;
  66 }
  67
  68
  69 LinearArrangement::Loader::Loader(LinearArrangement &c):
  70         DataFile::ObjectLoader<LinearArrangement>(c)
  71 {
  72         add("expand", &Loader::expand);
  73         add("split", &Loader::split);
  74 }
  75
  76 void LinearArrangement::Loader::expand()
  77 {
  78         obj.expand();
  79 }
  80
  81 void LinearArrangement::Loader::split()
  82 {
  83         obj.split();
  84 }
  85
  86 } // namespace GLtk
  87 } // namespace Msp