diff -r 000000000000 -r 1918ee327afb src/gui/graphicsview/qgraphicsscenelinearindex.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/gui/graphicsview/qgraphicsscenelinearindex.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,95 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtGui module 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.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+    \class QGraphicsSceneLinearIndex
+    \brief The QGraphicsSceneLinearIndex class provides an implementation of
+    a linear indexing algorithm for discovering items in QGraphicsScene.
+    \since 4.6
+    \ingroup graphicsview-api
+    \internal
+
+    QGraphicsSceneLinearIndex index is default linear implementation to discover items.
+    It basically store all items in a list and return them to the scene.
+
+    \sa QGraphicsScene, QGraphicsView, QGraphicsSceneIndex, QGraphicsSceneBspTreeIndex
+*/
+
+#include <private/qgraphicsscenelinearindex_p.h>
+
+/*!
+    \fn QGraphicsSceneLinearIndex::QGraphicsSceneLinearIndex(QGraphicsScene *scene = 0):
+
+    Construct a linear index for the given \a scene.
+*/
+
+/*!
+    \fn QList<QGraphicsItem *> QGraphicsSceneLinearIndex::items(Qt::SortOrder order = Qt::DescendingOrder) const;
+
+    Return all items in the index and sort them using \a order.
+*/
+
+
+/*!
+    \fn virtual QList<QGraphicsItem *> QGraphicsSceneLinearIndex::estimateItems(const QRectF &rect, Qt::SortOrder order) const
+
+    Returns an estimation visible items that are either inside or
+    intersect with the specified \a rect and return a list sorted using \a order.
+*/
+
+/*!
+    \fn void QGraphicsSceneLinearIndex::clear()
+    \internal
+    Clear the all the BSP index.
+*/
+
+/*!
+    \fn virtual void QGraphicsSceneLinearIndex::addItem(QGraphicsItem *item)
+
+    Add the \a item into the index.
+*/
+
+/*!
+    \fn virtual void QGraphicsSceneLinearIndex::removeItem(QGraphicsItem *item)
+
+    Add the \a item from the index.
+*/
+