/*

* 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 the License "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:      Observer interface for category data changes.*

*/

#ifndef VCXHGMYVIDEOSCATEGORYMODELOBSERVER_H

#define VCXHGMYVIDEOSCATEGORYMODELOBSERVER_H

// INCLUDES

#include <mpxcollectionmessagedefs.h>

#include <mpxitemid.h>

// FORWARD DECLARATIONS

class CMPXMediaArray;

class CMPXMedia;

// CLASS DECLARATION

/**

 * Observer interface for category data changes.

 * 

 * @lib vcxhgmyvideos.lib

 */

NONSHARABLE_CLASS( MVcxHgMyVideosCategoryModelObserver )

    {

    public:

        /**

         * Called when a list of categories is available.

         * Ownership of array is transferred.

         * 

         * @param aCategoryList List of categories

         * @param aIsPartial    ETrue if list fetching continues, and KVcxMessageMyVideosListComplete 

         *                      message will arrive. EFalse if this is last event of list fetching.

         */

        virtual void NewCategoryListL( CMPXMediaArray* aCategoryList, TBool aIsPartial ) = 0;

        /**

         * Called when the list of categories has been modified.

         */

        virtual void CategoryListModifiedL() = 0;

        /**

         * Called when a single category has been modified (add/remove/modify).

         * 

         * @param aEventType Type of modification event (add/remove/modify).

         * @param aMpxItemId MPX Item Id of the modified item.

         */

        virtual void CategoryModifiedL( TMPXChangeEventType aEventType, 

                                        TMPXItemId& aMpxItemId ) = 0;

        /**

         * Called when category list items have been fetched.

         */

        virtual void CategoryListFetchingCompletedL() = 0;

    };

#endif // VCXHGMYVIDEOSCATEGORYMODELOBSERVER_H