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