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#ifndef GRAPHWIDGET_H
#define GRAPHWIDGET_H

#include <QtGui/QGraphicsView>

class Node;

class GraphWidget : public QGraphicsView
{
    Q_OBJECT

public:
    GraphWidget(QWidget * = NULL);

	 typedef int NodeId ;
	 typedef int EdgeId ;

	 typedef enum  {
		 	ELASTIC_NODE_FLAG_OWN				= 0x0001,
			ELASTIC_NODE_FLAG_FRIEND 			= 0x0002,
			ELASTIC_NODE_FLAG_AUTHED			= 0x0004,
			ELASTIC_NODE_FLAG_MARGINALAUTH	= 0x0008
	 } NodeFlags ;

    virtual void itemMoved();
	 NodeId addNode(const std::string& NodeText,uint32_t flags) ;
	 EdgeId addEdge(NodeId n1,NodeId n2) ;

	 void clearGraph() ;

protected:
    void keyPressEvent(QKeyEvent *event);
    void timerEvent(QTimerEvent *event);
    void wheelEvent(QWheelEvent *event);
    void drawBackground(QPainter *painter, const QRectF &rect);

    void scaleView(qreal scaleFactor);

private:
    int timerId;
    //Node *centerNode;
	 bool mDeterminedBB ;

	 std::vector<Node *> _nodes ;
	 std::vector<Node *> _edges ;
};

#endif