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         next_spacing(-1)
  15 { }
  16
  17 void LinearArrangement::split()
  18 {
  19         if(gravity==primary)
  20                 throw arrangement_error("already split");
  21
  22         split_here = true;
  23         gravity = primary;
  24 }
  25
  26 void LinearArrangement::expand()
  27 {
  28         if(gravity==primary)
  29                 throw arrangement_error("already split");
  30         if(edges[primary].empty())
  31                 throw arrangement_error("no widgets");
  32
  33         add_constraint(*edges[primary].widgets.front(), get_align_constraint(primary), primary);
  34         layout.set_expand(*edges[primary].widgets.front(), (primary==LEFT || primary==RIGHT), (primary==TOP || primary==BOTTOM));
  35         edges[primary].align();
  36         gravity = primary;
  37 }
  38
  39 void LinearArrangement::spacing(unsigned s)
  40 {
  41         next_spacing = s;
  42 }
  43
  44 void LinearArrangement::process_widget(Widget &wdg, Side side, bool aligned)
  45 {
  46         if(side==opposite)
  47         {
  48                 bool snug = (internal_aligned && aligned && !split_here);
  49                 add_constraint(wdg, get_order_constraint(primary, !snug), primary, next_spacing);
  50                 if(first)
  51                         edges[side].add(wdg, (aligned && gravity==opposite));
  52         }
  53         else if(side==primary)
  54                 next.add(wdg, aligned);
  55         else
  56         {
  57                 if(edges[side].aligned && aligned)
  58                         add_constraint(wdg, get_align_constraint(side), side);
  59                 edges[side].add(wdg, aligned);
  60         }
  61 }
  62
  63 void LinearArrangement::finish_slot()
  64 {
  65         internal_aligned = next.aligned;
  66         if(gravity!=primary)
  67                 next.aligned = false;
  68         edges[primary] = next;
  69         next.clear();
  70         split_here = false;
  71         first = false;
  72         next_spacing = -1;
  73 }
  74
  75
  76 LinearArrangement::Loader::Loader(LinearArrangement &c):
  77         DataFile::ObjectLoader<LinearArrangement>(c)
  78 {
  79         add("expand", &Loader::expand);
  80         add("spacing", &Loader::spacing);
  81         add("split", &Loader::split);
  82 }
  83
  84 void LinearArrangement::Loader::expand()
  85 {
  86         obj.expand();
  87 }
  88
  89 void LinearArrangement::Loader::spacing(unsigned s)
  90 {
  91         obj.spacing(s);
  92 }
  93
  94 void LinearArrangement::Loader::split()
  95 {
  96         obj.split();
  97 }
  98
  99 } // namespace GLtk
 100 } // namespace Msp