graphwidget.h

/* Copyright (C) 2018 The Qt Company Ltd. */

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#ifndef GRAPHWIDGET_H
#define GRAPHWIDGET_H

#include <QGraphicsView>
#include <QDebug> 
#include "node.h"
#include "edge.h"
#include <QRandomGenerator>
#include <QWheelEvent>
#include "graph.h"


/* Circular Dependecy; Foward declaration */
class Node;
class Edge;

/* Specify that this class use its own signals and slots */
class GraphWidget : public QGraphicsView
{
    Q_OBJECT
private:
    int timerId = 0;
    QMap<int, Node*> nodeMap;
    Node *centerNode;
    QWidget* par;
    QVector< QVector<Edge*> > e;
    QVector< QVector<int> > allow;

    Graph* graph;
    /* QGraphicsScene* scene; */

public:
    explicit GraphWidget(QWidget *parent = nullptr);
    void itemMoved();
    Node* addNode(int num);
    void addEdge(int u, int v, int w, int allow);
    void draw();
    void clear();
    Graph* getGraph();
    void resetColor();
    Edge* getEdge(int i, int j);
public slots: 
    void shuffle();
    void zoomIn();
    void zoomOut();
protected:
    void resizeEvent(QResizeEvent* event) override;
    void keyPressEvent(QKeyEvent *event) override;
    void timerEvent(QTimerEvent *event) override;
#if QT_CONFIG(wheelevent)
    void wheelEvent(QWheelEvent *event) override;
#endif
    void drawBackground(QPainter *painter, const QRectF &rect) override;
    void scaleView(qreal scaleFactor);
};


#endif // GRAPHWIDGET_H