/*

* 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:  Collection observer interface.

*

*/

#ifndef M_AKNCOLLECTIONOBSERVER_H

#define M_AKNCOLLECTIONOBSERVER_H

class CAknItemActionMenu;

/**

 * Collection observer.

 *

 * This interface is intended for those objects that are interested

 * of collection state and need to receive collection notifications.

 *

 * @lib eikcoctl

 * @since S60 v5.2

 */

class MAknCollectionObserver

    {

public:

    /**

     * This method is used to set the item action menu to observer.

     * 

     * @param aItemActionMenu Item action menu. 

     */

    virtual void SetItemActionMenu( CAknItemActionMenu* aItemActionMenu ) = 0;

    /**

     * This method is called when there are changes in collection state.

     * 

     * @param aCollectionVisible ETrue if changed collection is visible.

     */

    virtual void CollectionChanged( TBool aCollectionVisible ) = 0;

    /**

     * This method returns ETrue if collection observer is active.

     * 

     * @return ETrue if observer is active.

     */

    virtual TBool Active() const = 0;

    };

#endif // M_AKNCOLLECTIONOBSERVER_H