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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see http://www.qt.io/terms-conditions. For further
** information use the contact form at http://www.qt.io/contact-us.
**
** 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 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef PatternistSDK_TreeItem_H
#define PatternistSDK_TreeItem_H
#include <QObject>
#include "Global.h"
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
#endif
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