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+/****************************************************************************
+**
+** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+** the names of its contributors may be used to endorse or promote
+** products derived from this software without specific prior written
+** permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef ARROW_H
+#define ARROW_H
+
+#include <QGraphicsLineItem>
+
+#include "diagramitem.h"
+
+QT_BEGIN_NAMESPACE
+class QGraphicsPolygonItem;
+class QGraphicsLineItem;
+class QGraphicsScene;
+class QRectF;
+class QGraphicsSceneMouseEvent;
+class QPainterPath;
+QT_END_NAMESPACE
+
+//! [0]
+class Arrow : public QGraphicsLineItem
+{
+public:
+ enum { Type = UserType + 4 };
+
+ Arrow(DiagramItem *startItem, DiagramItem *endItem,
+ QGraphicsItem *parent = 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; }
+
+ void updatePosition();
+
+protected:
+ void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
+ QWidget *widget = 0);
+
+private:
+ DiagramItem *myStartItem;
+ DiagramItem *myEndItem;
+ QColor myColor;
+ QPolygonF arrowHead;
+};
+//! [0]
+
+#endif