/*

* Copyright (c) 2006-2007 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:  Watcher for PubSub and CenRep keys.

*

*/

#ifndef CBTUIKEYWATCHER_H

#define CBTUIKEYWATCHER_H

#include <e32property.h>

#include <centralrepository.h>

#include "BTUIActive.h"

//  Identification for key and active object to be watched

const TInt KBTUIPHYCountWatcher = 0x01;

/**

 *  Class CBTUIKeyWatcher

 *

 *  Notify and handle the key values' change.

 *

 *  @since S60 v5.0

 */

class CBTUIKeyWatcher : public CBase, public MBTUIActiveObserver

    {

public:

    /**

     * Two-phase constructor

	 * 

	 * @param aCaller The one calls this class.

	 * @param aServiceID Identify which key to be listened to. 

	 *                   It can be a logical AND value when listening to multiple keys. 

     */

    static CBTUIKeyWatcher* NewL( TAny* aCaller, TInt aServiceID);

    /**

     * Destructor

     */

    virtual ~CBTUIKeyWatcher();

    /**

     * From MBTUIActiveObserver.

     * Notification that a key value has changed.

     *

     * @since S60 v5.0

     * @param aActive Active object for the key which value changed.

     * @param aId Identification for key, defined in this file.

     * @param aStatus Request status

     */

    void RequestCompletedL( CBTUIActive* aActive, TInt aId, TInt aStatus );

    /**

     * From MBTUIActiveObserver.

     * Notification that a key value has changed.

     *

     * @since S60 v5.0

     * @param aActive Active object for the key which value changed.

     * @param aId Identification for key, defined in this file.

     * @param aError Error occured in Active Object's RunL().

     */

    void HandleError( CBTUIActive* aActive, TInt aId, TInt aError );

private:

    /**

     * C++ default constructor

     * @param aCaller The one calls this class.

     */

    CBTUIKeyWatcher( TAny* aCaller );

    /**

     * Symbian 2nd-phase constructor

     * @param aServiceID Identify which key to be listened to. It can 

	 *        be a logical AND value when listening to multiple keys. 

     */

    void ConstructL( TInt aServiceID );

private: // data

   	/**

     * Property containing count of physical BT connections.

     * When physical connections exists, specific BT UI indicator is shown.

     */

    RProperty iPHYCountKey;

    /**

     * Active object for listening to above keys' change.

     * Own.

     */    

    CBTUIActive* iPHYCountWatcher;

    /**

     * Our caller view.

     * Not own.

     */

    TAny* iCaller; 

    };

#endif // CBTUIKEYWATCHER_H