#ifndef SYSTEMTAP_GRAPHSTYLE_HXX
#define SYSTEMTAP_GRAPHSTYLE_HXX 1
#include <tr1/memory>

#include <cairomm/context.h>

namespace systemtap
{
  class GraphDataBase;
  class Graph;

  class GraphStyle
  {
  public:
    virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
                      Graph* graph, Cairo::RefPtr<Cairo::Context> cr) = 0;
  };

  class GraphStyleBar : public GraphStyle
  {
  public:
    virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
                      Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
    static GraphStyleBar instance;
  };

  class GraphStyleDot : public GraphStyle
  {
  public:
    virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
                      Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
    static GraphStyleDot instance;
  };

  class GraphStyleEvent : public GraphStyle
  {
  public:
    virtual void draw(std::tr1::shared_ptr<GraphDataBase> graphData,
                      Graph* graph, Cairo::RefPtr<Cairo::Context> cr);
    static GraphStyleEvent instance;
  };  
}
#endif