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node.h Example File
graphicsview/elasticnodes/node.h

    /****************************************************************************
    **
    ** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
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    ** License version 2.0 as published by the Free Software Foundation
    ** and appearing in the file LICENSE.GPL included in the packaging of
    ** this file.  Please review the following information to ensure GNU
    ** General Public Licensing requirements will be met:
    ** http://www.trolltech.com/products/qt/opensource.html
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    #ifndef NODE_H
    #define NODE_H

    #include <QGraphicsItem>
    #include <QList>

    class Edge;
    class GraphWidget;
    class QGraphicsSceneMouseEvent;

    class Node : public QGraphicsItem
    {
    public:
        Node(GraphWidget *graphWidget);

        void addEdge(Edge *edge);
        QList<Edge *> edges() const;

        enum { Type = UserType + 1 };
        int type() const { return Type; }

        void calculateForces();
        bool advance();

        QRectF boundingRect() const;
        QPainterPath shape() const;
        void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget);

    protected:
        QVariant itemChange(GraphicsItemChange change, const QVariant &value);

        void mousePressEvent(QGraphicsSceneMouseEvent *event);
        void mouseReleaseEvent(QGraphicsSceneMouseEvent *event);

    private:
        QList<Edge *> edgeList;
        QPointF newPos;
        GraphWidget *graph;
    };

    #endif


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Qt 4.2.0-snapshot-20060701