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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** 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