Observer.hpp

Go to the documentation of this file.

// vim:sw=2:ts=8
#ifndef OBSERVER__HPP
#define OBSERVER__HPP

#include "def_graph.hpp"


namespace gns {


  class Subject;


  class Item
  {
    public:
      int type;  
      Node node; 
      Edge edge; 
      Item() { type = 0; }
      Item(const Item &item)
      {
          this->type = item.type;
          if( type == 1 ) this->node = item.node;
          else if( type == 2 ) this->edge = item.edge;
      }
      Item(Node n) { this->type = 1; this->node = n; }
      Item(Edge e) { this->type = 2; this->edge = e; }
  };


  class Message
  {
    public:
      const static long new_node        = 0x0010; 
      const static long del_node        = 0x0011; 
      const static long del_node_done   = 0x0012; 
      const static long new_edge        = 0x0020; 
      const static long del_edge        = 0x0021; 
      const static long del_edge_done   = 0x0022; 
      const static long begin_edit_seq  = 0x0030; 
      const static long end_edit_seq    = 0x0031; 
      const static long node_id_changed = 0x0040; 
      const static long edge_id_changed = 0x0041; 
  };


  class Observer
  {
    public:
      Observer() {};
      virtual ~Observer() {};
      virtual void update(Subject *sub, long msg, Item item) =0;
  };

}

std::ostream& operator<< (std::ostream& ost, gns::Item& i);


#endif

---