/****************************************************************************+
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**+
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** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (developer.feedback@nokia.com)+
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**+
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** This file is part of the HbWidgets module of the UI Extensions for Mobile.+
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**+
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** GNU Lesser General Public License Usage+
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** This file may be used under the terms of the GNU Lesser General Public+
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** License version 2.1 as published by the Free Software Foundation and+
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** appearing in the file LICENSE.LGPL included in the packaging of this file.+
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** Please review the following information to ensure the GNU Lesser General+
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** Public License version 2.1 requirements will be met:+
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at developer.feedback@nokia.com.+
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**+
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****************************************************************************/+
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+
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#ifndef HBTREEMODELITERATOR_P_P_H+
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#define HBTREEMODELITERATOR_P_P_H+
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+
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#include <hbglobal.h>+
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#include "hbtreemodeliterator_p.h"+
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#include "hbmodeliterator_p.h"+
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+
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QT_BEGIN_NAMESPACE+
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class QAbstractItemModel;+
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class QModelIndex;+
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QT_END_NAMESPACE+
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+
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class HbAbstractItemContainer;+
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class HbTreeModelIterator;+
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+
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class HbTreeModelIteratorPrivate : public HbModelIteratorPrivate+
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{+
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    Q_DECLARE_PUBLIC(HbTreeModelIterator)+
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+
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public:+
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    HbTreeModelIteratorPrivate();+
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    ~HbTreeModelIteratorPrivate();+
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+
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    QModelIndex first(const QModelIndex &parent) const;+
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    QModelIndex last(const QModelIndex &parent) const;+
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    int childIndexCount(const QModelIndex &index) const;+
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    void resetCache();+
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    int searchForward(const QModelIndex &index) const;+
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    int searchBackward(const QModelIndex &index) const;+
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    QModelIndexList createParentChainList(const QModelIndex &index) const;+
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    bool isExpanded(const QModelIndex &index) const;+
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    bool isExpandedBranch(const QModelIndex &index) const;+
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    inline bool isInCountCache(const QModelIndex &index) const;+
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    inline bool isInPositionCache(const QModelIndex &index) const;+
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+
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    struct CachedIndexCount {+
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        int count;+
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        QModelIndex index;+
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        CachedIndexCount(int c = 0, QModelIndex i = QModelIndex()) {count = c; index = i;};+
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    };+
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+
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    mutable struct CachedIndexCount mCachedCount;+
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    mutable struct CachedIndexCount mCachedPosition;+
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+
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    HbAbstractItemContainer *mItemContainer;+
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    bool mUseCache;+
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};+
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+
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bool HbTreeModelIteratorPrivate::isInCountCache(const QModelIndex &index) const+
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{+
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    return (mUseCache+
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            && index == mCachedCount.index)+
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            && (mCachedCount.count >= 0);+
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}+
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+
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inline bool HbTreeModelIteratorPrivate::isInPositionCache(const QModelIndex &index) const+
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{+
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    return (mUseCache+
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            && index == mCachedPosition.index)+
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            && (mCachedPosition.count >= 0);+
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}+
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+
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#endif // HBMODELITERATOR_P_P_H+
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