/****************************************************************************

**

** 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 "hblistmodel_p.h"

#include "hblistwidgetitem_p.h"

#include <hblistwidgetitem.h>

HbListModel::HbListModel(QObject *parent) : 

    QAbstractListModel(parent)

{

}

HbListModel::~HbListModel()

{

    qDeleteAll(items);

}

void HbListModel::clear()

{

    for (int i = 0; i < items.count(); ++i) {

        if (items.at(i)) {

            items.at(i)->d->id = -1;

            delete items.at(i);

        }

    }

    items.clear();

    reset();

}

HbListWidgetItem *HbListModel::item(int row) const

{

    return items.value(row);

}

void HbListModel::insert(int row, HbListWidgetItem *item)

{

    //Do not accept duplicate inserts.

    //Occurs e.g if user of HbListWidgetitem creates HbListWidgetItem and gives a parent

    //(HbListWidget) but still calls HbListWidget::addItem()

    if (!item || items.contains(item) )

        return;

    if (row < 0)

        row = 0;

    else if (row > items.count())

        row = items.count();

    beginInsertRows(QModelIndex(), row, row);

    items.insert(row, item);

    item->d->id = row;

    endInsertRows();

}

void HbListModel::appendRow(HbListWidgetItem *item)

{

    item->d->mModel = this;

    insert(rowCount(),item);

}

HbListWidgetItem *HbListModel::take(int row)

{

    if (row < 0 || row >= items.count())

        return 0;

    beginRemoveRows(QModelIndex(), row, row);

    items.at(row)->d->id = -1;

    HbListWidgetItem *item = items.takeAt(row);

    endRemoveRows();

    return item;

}

int HbListModel::rowCount(const QModelIndex &parent) const

{

     return parent.isValid() ? 0 : items.count();

}

QModelIndex HbListModel::index(HbListWidgetItem *item) const

{

    if (!item || items.isEmpty())

        return QModelIndex();

    int row;

    const int id = item->d->id;

    if (id >= 0 && id < items.count() && items.at(id) == item)

    {

        row = id;

    }

    else

    {

        // we need to search for the item

        row = items.lastIndexOf(item);  // lastIndexOf is an optimization in favor of indexOf

        if (row == -1) // not found

            return QModelIndex();

        item->d->id = row;

    }

    return createIndex(row, 0, item);

}

QModelIndex HbListModel::index(int row, int column, const QModelIndex &parent) const

{

    if (hasIndex(row, column, parent))

        return createIndex(row, column, items.at(row));

     return QModelIndex();

}

QVariant HbListModel::data(const QModelIndex &index, int role) const

{

    if (!index.isValid() || index.row() >= items.count())

        return QVariant();

    return items.at(index.row())->data(role);

}

bool HbListModel::setData(const QModelIndex &index, const QVariant &value, int role)

{

    if (!index.isValid() || index.row() >= items.count())

        return false;

    items.at(index.row())->setData(value,role);

    return true;

}

bool HbListModel::removeRows(int row, int count, const QModelIndex &parent)

{

    if (count < 1 || row < 0 || (row + count) > rowCount() || parent.isValid())

        return false;

    beginRemoveRows(QModelIndex(), row, row + count - 1);

    HbListWidgetItem *itm = 0;

    for (int r = row; r < row + count; ++r) {

        itm = items.takeAt(row);

        itm->d->id = -1;

        delete itm;

    }

    endRemoveRows();

    return true;

}

void HbListModel::itemChanged(HbListWidgetItem *item)

{

    QModelIndex idx = index(item);

    emit dataChanged(idx, idx);

}

Qt::ItemFlags HbListModel::flags(const QModelIndex &index) const

{

    if (index.isValid()) {

        const HbListWidgetItem *item = items.at(index.row());

        if (item) {

            return item->d->flags;

        } 

    }

    return 0;

}

#include "moc_hblistmodel_p.cpp"