1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (developer.feedback@nokia.com)

     6 **

     7 ** This file is part of the HbWidgets module of the UI Extensions for Mobile.

     8 **

     9 ** GNU Lesser General Public License Usage

    10 ** This file may be used under the terms of the GNU Lesser General Public

    11 ** License version 2.1 as published by the Free Software Foundation and

    12 ** appearing in the file LICENSE.LGPL included in the packaging of this file.

    13 ** Please review the following information to ensure the GNU Lesser General

    14 ** Public License version 2.1 requirements will be met:

    15 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    16 **

    17 ** In addition, as a special exception, Nokia gives you certain additional

    18 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    19 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    20 **

    21 ** If you have questions regarding the use of this file, please contact

    22 ** Nokia at developer.feedback@nokia.com.

    23 **

    24 ****************************************************************************/

    25 

    26 #ifndef HBTREEMODELITERATOR_P_P_H

    27 #define HBTREEMODELITERATOR_P_P_H

    28 

    29 #include <hbglobal.h>

    30 #include "hbtreemodeliterator_p.h"

    31 #include "hbmodeliterator_p.h"

    32 

    33 QT_BEGIN_NAMESPACE

    34 class QAbstractItemModel;

    35 class QModelIndex;

    36 QT_END_NAMESPACE

    37 

    38 class HbAbstractItemContainer;

    39 class HbTreeModelIterator;

    40 

    41 class HbTreeModelIteratorPrivate : public HbModelIteratorPrivate

    42 {

    43     Q_DECLARE_PUBLIC(HbTreeModelIterator)

    44 

    45 public:

    46     HbTreeModelIteratorPrivate();

    47     ~HbTreeModelIteratorPrivate();

    48 

    49     QModelIndex first(const QModelIndex &parent) const;

    50     QModelIndex last(const QModelIndex &parent) const;

    51     int childIndexCount(const QModelIndex &index) const;

    52     void resetCache();

    53     int searchForward(const QModelIndex &index) const;

    54     int searchBackward(const QModelIndex &index) const;

    55     QModelIndexList createParentChainList(const QModelIndex &index) const;

    56     bool isExpanded(const QModelIndex &index) const;

    57     bool isExpandedBranch(const QModelIndex &index) const;

    58     inline bool isInCountCache(const QModelIndex &index) const;

    59     inline bool isInPositionCache(const QModelIndex &index) const;

    60 

    61     struct CachedIndexCount {

    62         int count;

    63         QModelIndex index;

    64         CachedIndexCount(int c = 0, QModelIndex i = QModelIndex()) {count = c; index = i;};

    65     };

    66 

    67     mutable struct CachedIndexCount mCachedCount;

    68     mutable struct CachedIndexCount mCachedPosition;

    69 

    70     HbAbstractItemContainer *mItemContainer;

    71     int mExpansionKey;

    72     bool mUseCache;

    73 };

    74 

    75 bool HbTreeModelIteratorPrivate::isInCountCache(const QModelIndex &index) const

    76 {

    77     return (mUseCache

    78             && index == mCachedCount.index)

    79             && (mCachedCount.count >= 0);

    80 }

    81 

    82 inline bool HbTreeModelIteratorPrivate::isInPositionCache(const QModelIndex &index) const

    83 {

    84     return (mUseCache

    85             && index == mCachedPosition.index)

    86             && (mCachedPosition.count >= 0);

    87 }

    88 

    89 #endif // HBMODELITERATOR_P_P_H