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/****************************************************************************
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the QtGui module of the Qt Toolkit.
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** This file contains pre-release code and may not be distributed.
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\class QGraphicsSceneLinearIndex
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\brief The QGraphicsSceneLinearIndex class provides an implementation of
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a linear indexing algorithm for discovering items in QGraphicsScene.
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\ingroup graphicsview-api
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QGraphicsSceneLinearIndex index is default linear implementation to discover items.
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It basically store all items in a list and return them to the scene.
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\sa QGraphicsScene, QGraphicsView, QGraphicsSceneIndex, QGraphicsSceneBspTreeIndex
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#include <private/qgraphicsscenelinearindex_p.h>
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\fn QGraphicsSceneLinearIndex::QGraphicsSceneLinearIndex(QGraphicsScene *scene = 0):
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Construct a linear index for the given \a scene.
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\fn QList<QGraphicsItem *> QGraphicsSceneLinearIndex::items(Qt::SortOrder order = Qt::DescendingOrder) const;
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Return all items in the index and sort them using \a order.
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\fn virtual QList<QGraphicsItem *> QGraphicsSceneLinearIndex::estimateItems(const QRectF &rect, Qt::SortOrder order) const
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Returns an estimation visible items that are either inside or
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intersect with the specified \a rect and return a list sorted using \a order.
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\fn void QGraphicsSceneLinearIndex::clear()
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Clear the all the BSP index.
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\fn virtual void QGraphicsSceneLinearIndex::addItem(QGraphicsItem *item)
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Add the \a item into the index.
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\fn virtual void QGraphicsSceneLinearIndex::removeItem(QGraphicsItem *item)
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Add the \a item from the index.