source/arrangement.h

   1 #ifndef MSP_GLTK_ARRANGEMENT_H_
   2 #define MSP_GLTK_ARRANGEMENT_H_
   3
   4 #include <list>
   5 #include <stdexcept>
   6 #include "layout.h"
   7
   8 namespace Msp {
   9 namespace GLtk {
  10
  11 class Widget;
  12
  13 class arrangement_error: public std::logic_error
  14 {
  15 public:
  16         arrangement_error(const std::string &w): std::logic_error(w) { }
  17         virtual ~arrangement_error() throw() { }
  18 };
  19
  20 class Arrangement
  21 {
  22 protected:
  23         enum Side
  24         {
  25                 TOP,
  26                 RIGHT,
  27                 BOTTOM,
  28                 LEFT
  29         };
  30
  31         struct Edge
  32         {
  33                 std::list<Widget *> widgets;
  34                 bool aligned;
  35
  36                 Edge();
  37
  38                 bool empty() { return widgets.empty(); }
  39                 void clear();
  40                 void add(Widget &, bool);
  41         };
  42
  43         Layout &layout;
  44         Arrangement *parent;
  45         Edge edges[4];
  46
  47         Arrangement(Layout &);
  48 public:
  49         virtual ~Arrangement();
  50
  51         void arrange(Widget &);
  52         void arrange(Arrangement &);
  53
  54 protected:
  55         virtual void process_widget(Widget &, Side, bool) = 0;
  56         virtual void finish_widget(Widget &) = 0;
  57         virtual void finish_slot() = 0;
  58         const Edge &get_edge(Side s) const { return edges[s]; }
  59         void add_constraint(Widget &, Layout::ConstraintType, Side);
  60         void add_constraint(Widget &, Layout::ConstraintType, const Edge &);
  61
  62         static Layout::ConstraintType get_order_constraint(Side, bool);
  63         static Layout::ConstraintType get_align_constraint(Side);
  64 };
  65
  66 } // namespace GLtk
  67 } // namespace Msp
  68
  69 #endif