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** This file is part of the example classes of the Qt Toolkit.
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#ifndef NODE_H
#define NODE_H

#include <QApplication>
#if QT_VERSION >= 0x040600
#include <QGraphicsObject>
#else
#include <QGraphicsItem>
#endif
#include <QList>

#include "graphwidget.h"

class Edge;
QT_BEGIN_NAMESPACE
class QGraphicsSceneMouseEvent;
QT_END_NAMESPACE

#if QT_VERSION >= 0x040600
class Node : public QGraphicsObject
#else
class Node : public QObject, public QGraphicsItem
#endif
{
	Q_OBJECT

public:
    Node(const std::string& node_string,GraphWidget::NodeType type,GraphWidget::AuthType auth,GraphWidget *graphWidget,const std::string& ssl_id,const std::string& gpg_id);

    void addEdge(Edge *edge);
    const QList<Edge *>& edges() const;

    int type() const { return Type; }
	 const std::string& idString() const { return _gpg_id ; }

    void calculateForces(const double *data,int width,int height,int W,int H,float x,float y,float speedf);
    bool advance();

    QRectF boundingRect() const;
    QPainterPath shape() const;
    void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);

	 int n_edges() const { return edgeList.size() ; }
protected:
    virtual QVariant itemChange(GraphicsItemChange change, const QVariant &value);

    virtual void mousePressEvent(QGraphicsSceneMouseEvent *event);
    virtual void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);

	 virtual void contextMenuEvent(QGraphicsSceneContextMenuEvent *) ;
    
 protected slots:
	 void denyFriend() ;
	 void makeFriend() ;
	 void peerDetails() ;
private:
    QList<Edge *> edgeList;
    QPointF newPos;
    GraphWidget *graph;
	 qreal _speedx,_speedy;
	 int _steps ;
	 std::string _desc_string ;
	 GraphWidget::NodeType _type ;
	 GraphWidget::AuthType _auth ;
	 bool mDeterminedBB ;
	 int mBBWidth ;

	 static Node *_selected_node ;

	 std::string _ssl_id ;
	 std::string _gpg_id ;

	 static const float MASS_FACTOR = 10 ;
	 static const float FRICTION_FACTOR = 10.8 ;
	 static const float REPULSION_FACTOR = 4 ;
	 static const float NODE_DISTANCE = 130.0 ;
};

#endif