/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#ifndef IRCHANNELDATAPROVIDER_H

#define IRCHANNELDATAPROVIDER_H

#include <hgwidgets/hgdataprovidermodel.h>

class IRQChannelItem;

class IRQPreset;

class IRQIsdsClient;

const int KCacheSize = 50;

const int KCacheThreshold = 20;

class IRChannelDataProvider : public HgDataProviderModel

{

Q_OBJECT

public:

    IRChannelDataProvider(QObject *aParent);

    ~IRChannelDataProvider();

    void activate();

    void deactivate();

    IRQChannelItem* getChannelItemByIndex(int aIndex);

signals:

    void dataAvailable();

protected:

    //from HgDataProviderModel

    void doReleaseData(QList<int> aList, bool aSilent);

    void doRequestData(QList<int> aList, bool aSilent);  

    QVariant defaultIcon() const;  

    void doResetModel();

private slots:

    void updateData(QList<IRQChannelItem*> *aPushItemsList);

    void presetLogoDownload(IRQPreset* aPreset);

    void presetLogoDownloadError();

    void downloadNextLogo();

private:

    void startDownloading(int aIndex);

    void clearAndDestroyItems();

    void clearAndDestroyLogos();

private:

    QList<IRQChannelItem*> *iChannelList;

    QVariant iDefaultLogo;

    QMap<int, HbIcon*>     iLogos;  //save the downloaded logos

    QList<int> iRequestedItems; //save the indexes of requested items

    IRQPreset *iLogoPreset;

    QTimer *iLogoDownloadTimer;

    IRQIsdsClient *iIsdsClient;

    bool iActivated;

};

#endif