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/* Functions for drawing the circles and info on screen */#include <QGraphicsScene>#include <QGraphicsItem>#include <QPainter>#include <QObject>class node : public QObject, public QGraphicsItem{	//Q_Objectpublic:	int x, y, r;	node(int, int, int);        void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,                QWidget *widget);private:	//void drawNode(int, int, int, QPainter *painter, QWidget *widget);};node::node(int _x, int _y, int _r){	x = _x;        y = _y;        r = _r;}void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,                QWidget *widget){	painter -> setBrush(Qt::black);	painter -> drawEllipse(x, y, (r * 2), (r * 2));}/*void node::drawNode(int x, int y, int r, QPainter *painter, QWidget *){	painter -> setBrush(Qt::black);	painter -> drawEllipse(x, y, (r * 2), (r * 2));}*/