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++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #ifndef NODE_H
++ #define NODE_H
++
++ #include <QGraphicsItem>
++ #include <QList>
++
++ class Edge;
++ class GraphWidget;
++
++ //! [0]
++ class Node : public QGraphicsItem
++ {
++ public:
++ Node(GraphWidget *graphWidget);
++
++ void addEdge(Edge *edge);
++ QList<Edge *> edges() const;
++
++ enum { Type = UserType + 1 };
++ int type() const override { return Type; }
++
++ void calculateForces();
++ bool advancePosition();
++
++ QRectF boundingRect() const override;
++ QPainterPath shape() const override;
++ void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
++
++ protected:
++ QVariant itemChange(GraphicsItemChange change, const QVariant &value) override;
++
++ void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
++ void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
++
++ private:
++ QList<Edge *> edgeList;
++ QPointF newPos;
++ GraphWidget *graph;
++ };
++ //! [0]
++
++ #endif // NODE_H