/*

* 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: Music Player engine.

*

*/

#ifndef MPENGINE_H

#define MPENGINE_H

#include <QObject>

#include "mpmpxcommondefs.h"

class QStringList;

class QTranslator;

class HbNotificationDialog;

class MpMpxFrameworkWrapper;

class MpSongScanner;

class MpMediaKeyHandler;

#if defined(BUILD_MPENGINE_LIB)

#define MPENGINE_EXPORT Q_DECL_EXPORT

#else

#define MPENGINE_EXPORT Q_DECL_IMPORT

#endif

class MPENGINE_EXPORT MpEngine : public QObject

{

    Q_OBJECT

private:

    enum UsbBlockingState {

        USB_NotConnected,          // Not connected

        USB_Connected,             // Connected in MTP mode but not synchronizing

        USB_Synchronizing          // Connected in MassStorage mode or MTP mode and synchronizing

    };

private:

    explicit MpEngine();

public:

    virtual ~MpEngine();

    static MpEngine *instance();

    void refreshLibrary();

    bool verifyUsbBlocking( bool showMessage = false );

signals:

    void libraryAboutToRefresh();

    void libraryRefreshed();

    void usbBlocked( bool blocked );

    void exitApplication();

public slots:

    void handleScanStarted();

    void handleScanEnded( int count, int error );

    void handleDiskEvent( MpxDiskEvents event );

    void handleUsbEvent( MpxUsbEvents event );

private:

    void handleUsbMassStorageStartEvent();

    void handleUsbMassStorageEndEvent();

    void handleUsbMtpStartEvent();

    void handleUsbMtpEndEvent();

    void handleUsbMtpNotActive();

    void changeUsbBlockingState( UsbBlockingState state );

private:

    Q_DISABLE_COPY( MpEngine )

    MpMpxFrameworkWrapper       *mMpxWrapper;       // Own

    MpSongScanner               *mSongScanner;      // Own

    MpMediaKeyHandler           *mMediaKeyHandler;  // Own

    HbNotificationDialog        *mUsbBlockingNote;  // Own

    QTranslator                 *mMpTranslator;     // Own

    UsbBlockingState            mUsbBlockingState;

    UsbBlockingState            mPreviousUsbState;

};

#endif // MPENGINE_H