/*

 * Copyright (c) 2002 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:   CFbsBitmap change observer

 *

 */

 #ifndef AKN_ICON_OBSERVER_H

 #define AKN_ICON_OBSERVER_H

 // INCLUDES

 // CONSTANTS

 // FORWARD DECLARATIONS

 class CFbsBitmap;

 // FUNCTION PROTOTYPES

 // CLASS DECLARATION

 /**

 * MAknIconObserver.

 */

 class MAknIconObserver

     {

 public:

     /**

     * This is an abstract class for specifying an interface for 

     * receiving notifications when an icon's frame buffer has been updated.

     * An object of derived class implementing this interface should be registered

     * for a given icon to the AknIcon framework using 

     * function AknIconUtils::SetObserver().

     * 

     * AknIcon framework calls this function whenever the frame buffer of the observed icon

     * changes. This observer mechanism is mainly useful in animated icons cases.

     * The observer e.g. can redraw the icon on the screen when the frame of the animated 

     * icon has changed.

     *

     * @since 2.8

     * @param aBitmap bitmap or mask of the icon

     */

     virtual void BitmapChanged(CFbsBitmap *aBitmap)=0;

     };

 /*

 *

 * This class is internal and not intended for use.

 *

 */

 class MAknIconChangeObserver

     {

 public:

     virtual void BitmapChanged()=0;

     };

 #endif // AKN_ICON_OBSERVER_H

 // End of File