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/****************************************************************************
**
** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights.  These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#ifndef DIAGRAMITEM_H
#define DIAGRAMITEM_H

#include <QGraphicsPixmapItem>
#include <QList>

QT_BEGIN_NAMESPACE
class QPixmap;
class QGraphicsItem;
class QGraphicsScene;
class QTextEdit;
class QGraphicsSceneMouseEvent;
class QMenu;
class QGraphicsSceneContextMenuEvent;
class QPainter;
class QStyleOptionGraphicsItem;
class QWidget;
class QPolygonF;
QT_END_NAMESPACE

class Arrow;

//! [0]
class DiagramItem : public QGraphicsPolygonItem
{
public:
    enum { Type = UserType + 15 };
    enum DiagramType { Step, Conditional, StartEnd, Io };

    DiagramItem(DiagramType diagramType, QMenu *contextMenu,
        QGraphicsItem *parent = 0, QGraphicsScene *scene = 0);

    void removeArrow(Arrow *arrow);
    void removeArrows();
    DiagramType diagramType() const
        { return myDiagramType; }
    QPolygonF polygon() const
        { return myPolygon; }
    void addArrow(Arrow *arrow);
    QPixmap image() const;
    int type() const
        { return Type;}

protected:
    void contextMenuEvent(QGraphicsSceneContextMenuEvent *event);
    QVariant itemChange(GraphicsItemChange change, const QVariant &value);

private:
    DiagramType myDiagramType;
    QPolygonF myPolygon;
    QMenu *myContextMenu;
    QList<Arrow *> arrows;
};
//! [0]

#endif