/****************************************************************************
**
** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (developer.feedback@nokia.com)
**
** This file is part of the HbWidgets module of the UI Extensions for Mobile.
**
** GNU Lesser General Public License Usage
** 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 developer.feedback@nokia.com.
**
****************************************************************************/

#include "hbmodeliterator_p.h"
#include <QAbstractItemModel>

HbModelIteratorPrivate::HbModelIteratorPrivate()
    : mModel(0), mRootIndex(QModelIndex())
{
}

HbModelIteratorPrivate::~HbModelIteratorPrivate()
{
}

QModelIndex HbModelIteratorPrivate::first(const QModelIndex &parent) const
{
    if (mModel) {
        return mModel->index(0, 0, parent);
    }
    return QModelIndex();
}

QModelIndex HbModelIteratorPrivate::last(const QModelIndex &parent) const
{
    if (mModel) {
        return mModel->index(mModel->rowCount(parent)-1, 0, parent);
    }
    return QModelIndex();
}

void HbModelIteratorPrivate::setModel(QAbstractItemModel *model, QModelIndex rootIndex)
{
    mModel = model;
    setRootIndex(rootIndex);
}

void HbModelIteratorPrivate::setRootIndex(QModelIndex rootIndex)
{
    if (mModel
        && rootIndex.isValid()) {
        #ifdef QT_DEBUG
            Q_ASSERT(rootIndex.model() == mModel);
        #endif
        if (rootIndex.model() == mModel) {
            mRootIndex = rootIndex;
        } else {
            mRootIndex = QModelIndex();
        }
    } else {
        mRootIndex = QModelIndex();
    }
}