/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc 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.
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**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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****************************************************************************/

#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
