| 1 | /**************************************************************************** | 
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| 2 | ** | 
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| 3 | ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). | 
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| 4 | ** All rights reserved. | 
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| 5 | ** Contact: Nokia Corporation (qt-info@nokia.com) | 
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| 6 | ** | 
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| 7 | ** This file is part of the QtGui module of the Qt Toolkit. | 
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| 8 | ** | 
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| 9 | ** $QT_BEGIN_LICENSE:LGPL$ | 
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| 10 | ** Commercial Usage | 
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| 11 | ** Licensees holding valid Qt Commercial licenses may use this file in | 
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| 12 | ** accordance with the Qt Commercial License Agreement provided with the | 
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| 13 | ** Software or, alternatively, in accordance with the terms contained in | 
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| 14 | ** a written agreement between you and Nokia. | 
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| 15 | ** | 
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| 16 | ** GNU Lesser General Public License Usage | 
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| 17 | ** Alternatively, this file may be used under the terms of the GNU Lesser | 
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| 18 | ** General Public License version 2.1 as published by the Free Software | 
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| 19 | ** Foundation and appearing in the file LICENSE.LGPL included in the | 
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| 20 | ** packaging of this file.  Please review the following information to | 
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| 21 | ** ensure the GNU Lesser General Public License version 2.1 requirements | 
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| 22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. | 
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| 23 | ** | 
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| 24 | ** In addition, as a special exception, Nokia gives you certain additional | 
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| 25 | ** rights.  These rights are described in the Nokia Qt LGPL Exception | 
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| 26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. | 
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| 27 | ** | 
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| 28 | ** GNU General Public License Usage | 
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| 29 | ** Alternatively, this file may be used under the terms of the GNU | 
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| 30 | ** General Public License version 3.0 as published by the Free Software | 
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| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the | 
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| 32 | ** packaging of this file.  Please review the following information to | 
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| 33 | ** ensure the GNU General Public License version 3.0 requirements will be | 
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| 34 | ** met: http://www.gnu.org/copyleft/gpl.html. | 
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| 35 | ** | 
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| 36 | ** If you have questions regarding the use of this file, please contact | 
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| 37 | ** Nokia at qt-info@nokia.com. | 
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| 38 | ** $QT_END_LICENSE$ | 
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| 39 | ** | 
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| 40 | ****************************************************************************/ | 
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| 41 |  | 
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| 42 | /*! | 
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| 43 | \class QGraphicsSceneLinearIndex | 
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| 44 | \brief The QGraphicsSceneLinearIndex class provides an implementation of | 
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| 45 | a linear indexing algorithm for discovering items in QGraphicsScene. | 
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| 46 | \since 4.6 | 
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| 47 | \ingroup graphicsview-api | 
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| 48 | \internal | 
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| 49 |  | 
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| 50 | QGraphicsSceneLinearIndex index is default linear implementation to discover items. | 
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| 51 | It basically store all items in a list and return them to the scene. | 
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| 52 |  | 
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| 53 | \sa QGraphicsScene, QGraphicsView, QGraphicsSceneIndex, QGraphicsSceneBspTreeIndex | 
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| 54 | */ | 
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| 55 |  | 
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| 56 | #include <private/qgraphicsscenelinearindex_p.h> | 
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| 57 |  | 
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| 58 | /*! | 
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| 59 | \fn QGraphicsSceneLinearIndex::QGraphicsSceneLinearIndex(QGraphicsScene *scene = 0): | 
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| 60 |  | 
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| 61 | Construct a linear index for the given \a scene. | 
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| 62 | */ | 
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| 63 |  | 
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| 64 | /*! | 
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| 65 | \fn QList<QGraphicsItem *> QGraphicsSceneLinearIndex::items(Qt::SortOrder order = Qt::DescendingOrder) const; | 
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| 66 |  | 
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| 67 | Return all items in the index and sort them using \a order. | 
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| 68 | */ | 
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| 69 |  | 
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| 70 |  | 
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| 71 | /*! | 
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| 72 | \fn virtual QList<QGraphicsItem *> QGraphicsSceneLinearIndex::estimateItems(const QRectF &rect, Qt::SortOrder order) const | 
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| 73 |  | 
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| 74 | Returns an estimation visible items that are either inside or | 
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| 75 | intersect with the specified \a rect and return a list sorted using \a order. | 
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| 76 | */ | 
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| 77 |  | 
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| 78 | /*! | 
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| 79 | \fn void QGraphicsSceneLinearIndex::clear() | 
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| 80 | \internal | 
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| 81 | Clear the all the BSP index. | 
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| 82 | */ | 
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| 83 |  | 
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| 84 | /*! | 
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| 85 | \fn virtual void QGraphicsSceneLinearIndex::addItem(QGraphicsItem *item) | 
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| 86 |  | 
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| 87 | Add the \a item into the index. | 
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| 88 | */ | 
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| 89 |  | 
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| 90 | /*! | 
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| 91 | \fn virtual void QGraphicsSceneLinearIndex::removeItem(QGraphicsItem *item) | 
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| 92 |  | 
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| 93 | Add the \a item from the index. | 
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| 94 | */ | 
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| 95 |  | 
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