1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #ifndef OBSRVR_H

    17 #define OBSRVR_H

    18 

    19 #include <e32base.h>

    20 

    21 class MObserver

    22 	{

    23 public:

    24 	virtual void Notify(TUint32 aId) = 0;

    25 	};

    26 

    27 class CObservable : public CBase

    28 	{

    29 public:

    30 	CObservable();

    31 	~CObservable();

    32 

    33 	TInt AddObserverL(MObserver& aObserver);

    34 	TInt RemoveObserver(MObserver& aObserver);

    35 	void Notify(TUint32 aVal) const;

    36 	

    37 protected:

    38 	TBool iNotificationState;//Notification can be made if iNotificationState is non-zero, 

    39 	                         //otherwise the notification is disabled

    40 

    41 private:

    42 	RPointerArray<MObserver> iObservers;

    43 	TInt iRefCount;

    44 	};

    45 

    46 #endif // OBSRVR_H