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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite 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 PatternistSDK_TreeItem_H
#define PatternistSDK_TreeItem_H
#include <QObject>
#include "Global.h"
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
class QVariant;
template<typename T> class QList;
template<typename T> class QPointer;
namespace QPatternistSDK
{
/**
* @short TreeItem is a node in a hierachial structure and is used together
* with TreeModel.
*
* TreeItem is abstract base class. Instances of sub-classes of TreeItem
* can be used with TreeModel in order to use hierarchial data in Qt's
* model/view framework.
*
* TreeItem is a QObject in order to be able to be used with QPointer.
*
* @author Frans Englich <frans.englich@nokia.com>
* @see TreeModel
* @ingroup PatternistSDK
*/
class Q_PATTERNISTSDK_EXPORT TreeItem : public QObject
{
Q_OBJECT
public:
typedef QList<QPointer<TreeItem> > List;
virtual ~TreeItem() {}
virtual void appendChild(TreeItem *item) = 0;
virtual TreeItem *child(const unsigned int row) const = 0;
virtual unsigned int childCount() const = 0;
virtual TreeItem *parent() const = 0;
virtual TreeItem::List children() const = 0;
virtual int columnCount() const = 0;
/**
* Determines the position among the children of
* this TreeItem's parent. This is done by introspecting the result
* of children().
*/
int row() const;
virtual QVariant data(const Qt::ItemDataRole role, int column) const = 0;
Q_SIGNALS:
/**
* Emitted whenever this item changed. This is used for keeping
* views in synchronization with the item model which houses
* this item.
*
* @param item the item which changed. That is, this TreeItem.
*/
void changed(TreeItem *item);
};
}
QT_END_NAMESPACE
QT_END_HEADER
#endif
// vim: et:ts=4:sw=4:sts=4
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