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# edge.h Example File
graphicsview/elasticnodes/edge.h

    /****************************************************************************
    **
    ** Copyright (C) 2006-2006 Trolltech ASA. All rights reserved.
    **
    ** This file is part of the example classes of the Qt Toolkit.
    **
    ** Licensees holding valid Qt Preview licenses may use this file in
    ** accordance with the Qt Preview License Agreement provided with the
    ** Software.
    **
    ** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
    ** information about Qt Commercial License Agreements.
    **
    ** Contact info@trolltech.com if any conditions of this licensing are
    ** not clear to you.
    **
    ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
    ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
    **
    ****************************************************************************/

    #ifndef EDGE_H
    #define EDGE_H

    #include <QGraphicsItem>

    class Node;

    class Edge : public QGraphicsItem
    {
    public:
        Edge(Node *sourceNode, Node *destNode);
        ~Edge();

        Node *sourceNode() const;
        void setSourceNode(Node *node);

        Node *destNode() const;
        void setDestNode(Node *node);

        void adjust();

        enum { Type = UserType + 2 };
        int type() const { return Type; }

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

    private:
        Node *source, *dest;

        QPointF sourcePoint;
        QPointF destPoint;
        qreal arrowSize;
    };

    #endif