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arrow.h Example File
graphicsview/diagramscene/arrow.h

 /****************************************************************************
 **
 ** Copyright (C) 2007-2008 Nokia Corporation and/or its subsidiary(-ies). All rights reserved.
 **
 ** This file is part of the documentation of the Qt Toolkit.
 **
 ** Licensees holding a valid Qt License Agreement may use this file in
 ** accordance with the rights, responsibilities and obligations
 ** contained therein.  Please consult your licensing agreement or
 ** contact [email protected] if any conditions of this licensing
 ** agreement are not clear to you.
 **
 ** Further information about Qt licensing is available at:
 ** http://trolltech.com/products/appdev/licensing.
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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 ARROW_H
 #define ARROW_H

 #include <QGraphicsLineItem>

 #include "diagramitem.h"

 class QGraphicsPolygonItem;
 class QGraphicsLineItem;
 class QGraphicsScene;
 class QRectF;
 class QGraphicsSceneMouseEvent;
 class QPainterPath;

 class Arrow : public QGraphicsLineItem
 {
 public:
     enum { Type = UserType + 4 };

     Arrow(DiagramItem *startItem, DiagramItem *endItem,
       QGraphicsItem *parent = 0, QGraphicsScene *scene = 0);

     int type() const
         { return Type; }
     QRectF boundingRect() const;
     QPainterPath shape() const;
     void setColor(const QColor &color)
         { myColor = color; }
     DiagramItem *startItem() const
         { return myStartItem; }
     DiagramItem *endItem() const
         { return myEndItem; }

 public slots:
     void updatePosition();

 protected:
     void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
                QWidget *widget = 0);

 private:
     DiagramItem *myStartItem;
     DiagramItem *myEndItem;
     QColor myColor;
     QPolygonF arrowHead;
 };

 #endif


Copyright © 2008 Nokia Corporation and/or its subsidiary(-ies) Trademarks
Qt 4.4.3