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 { }
  14
  15 void LinearArrangement::split()
  16 {
  17         if(gravity==primary)
  18                 throw arrangement_error("already split");
  19
  20         split_here = true;
  21         gravity = primary;
  22 }
  23
  24 void LinearArrangement::expand()
  25 {
  26         if(gravity==primary)
  27                 throw arrangement_error("already split");
  28         if(edges[primary].empty())
  29                 throw arrangement_error("no widgets");
  30
  31         add_constraint(*edges[primary].widgets.front(), get_align_constraint(primary), primary);
  32         layout.set_expand(*edges[primary].widgets.front(), false, true);
  33         edges[primary].align();
  34         gravity = primary;
  35 }
  36
  37 void LinearArrangement::process_widget(Widget &wdg, Side side, bool aligned)
  38 {
  39         if(side==opposite)
  40         {
  41                 bool snug = (edges[primary].aligned && aligned && !split_here);
  42                 add_constraint(wdg, get_order_constraint(primary, !snug), primary);
  43                 if(first)
  44                         edges[side].add(wdg, aligned);
  45         }
  46         else if(side==primary)
  47                 next.add(wdg, (aligned && gravity==primary));
  48         else
  49         {
  50                 if(edges[side].aligned && aligned)
  51                         add_constraint(wdg, get_align_constraint(side), side);
  52                 edges[side].add(wdg, aligned);
  53         }
  54 }
  55
  56 void LinearArrangement::finish_slot()
  57 {
  58         edges[primary] = next;
  59         next.clear();
  60         split_here = false;
  61         first = false;
  62 }
  63
  64
  65 LinearArrangement::Loader::Loader(LinearArrangement &c):
  66         DataFile::ObjectLoader<LinearArrangement>(c)
  67 {
  68         add("expand", &Loader::expand);
  69         add("split", &Loader::split);
  70 }
  71
  72 void LinearArrangement::Loader::expand()
  73 {
  74         obj.expand();
  75 }
  76
  77 void LinearArrangement::Loader::split()
  78 {
  79         obj.split();
  80 }
  81
  82 } // namespace GLtk
  83 } // namespace Msp