/*

* Copyright (c) 2008 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:   Definition of a CCH observer API

*

*/

#ifndef VCCCCHOBSERVER_H

#define VCCCCHOBSERVER_H

#include <e32base.h>

/**

 *  Observer class for CVccCchMonitor

 *

 *  The class that defines observer interfaces.

 *  Used to get notifications when CCH states changes.

 *  @code

 *   class CMyClass : public CBase, public MVccCchObserver

 *       {

 *   public:

 *       ...

 *       void CchServiceStatusChanged( TServiceStatus aStatus );

 *       ...

 *       }

 *

 *   void MyClass::CchServiceStatusChanged( TServiceStatus aStatus )

 *       {

 *       if ( aStatus == MVccCchObserver::EServiceUnavailable )

 *           {

 *           ServiceNotWorking();

 *           }

 *       else

 *           {

 *           ServiceWorking();

 *           }

 *       }

 *

 *  @endcode

 *

 *  @lib vcchotrigger.lib

 *  @since S60 v3.2

 */

class MVccCchObserver

    {

public:

    /**  Service status */

    enum TServiceStatus

        {

        EServiceUnavailable = 0,

        EServiceAvailable

        };

    /**

     * Observer interface. Called when the CCH status has been changed.

     *

     * @since S60 v3.2

     * @param aStatus Status of the service availability.

     */

    virtual void CchServiceStatusChanged( TServiceStatus aStatus ) = 0;

    };

#endif // VCCCCHOBSERVER_H