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#ifndef GRAPHWIDGET_H

#define GRAPHWIDGET_H

#include <QWidget>

#include <QGraphicsView>

#include <QGraphicsScene>

#include<gnode.h>

#include<gedge.h>

#include"graphs.h"

#define MAX_GNODES 50

#define MAX_EDGES 1180

#define GITEM_NODE 0

#define GITEM_EDGE 1

namespace graphs

{

namespace ui

{

class GraphWidget: public QGraphicsView

{

Q_OBJECT

enum ERROR{

OK = 0,

MAX_NODES_REACHED = 1

};

QGraphicsScene* scene;

int _NodeIndex;

GNode* _Nodes[MAX_GNODES];

int _EdgeIndex;

GEdge* _Edges[MAX_EDGES];

bool bShift;

bool _bDirected;

bool _bArrowLabel;

int nSelected[2];

int _countSel;

void resetNodes();

void connectNodes();

Graph G;

protected:

void mouseDoubleClickEvent(QMouseEvent * event);

void keyPressEvent(QKeyEvent * event);

void keyReleaseEvent(QKeyEvent * event);

signals:

void errorRaised(int code);

void nodeCreated(GNode* node);

//void nodesConnected(GNode* nodeIni, GNode* nodeFin, GEdge* edge);

//void nodeChanged(GNode* node);

public slots:

void nodePressed(GNode* node);

//void nodeMoved(GNode* node);

void edgeLengthChanged(int id, long newL);

public:

GraphWidget(bool directed, QWidget *parent = 0);

void resetGraphAppearance(bool hided);

void setItemOpacity(int id, int itemType, bool show);

void showArrowLabel();

const Graph& Graph();

};

} //namespace ui

} //namespace graphs

#endif // GRAPHWIDGET_H