/*

* Copyright (c) 2002-2007 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:  Defines an internal concrete class CAknsContainerDataContext

*                which implements a data context suitable for containers.

*

*/

#ifndef AKNSCONTAINERDATACONTEXT_H

#define AKNSCONTAINERDATACONTEXT_H

//  INCLUDES

#include <AknsDataContext.h>

// CLASS DECLARATION

/**

* Concrete data context suitable for containers.

* Implements data context that passes item reservation requests to root

* data context and releases all items reserved when lifetime of the context

* ends. Release requests are ignored.

* AknsUtils::CreateDataContextForContainerL() creates contexts of this type.

*

* This is an internal class that contains no exported functions. 

* The class is not intended for derivation outside the library.

*

* @since 2.0

*

* @internal

*/

NONSHARABLE_CLASS(CAknsContainerDataContext) : public CBase, public MAknsDataContext

    {

    public:  // Constructors and destructor        

        /**

        * Two-phased constructor.

        * @par Exceptions:

        *   If construction fails, leaves with an error code.

        *

        * @internal

        */

        static CAknsContainerDataContext* NewL();

        /**

        * Destructor.

        * Releases all the items reserved using this context.

        *

        * @internal

        */

        virtual ~CAknsContainerDataContext();

    public: // Functions from MAknsDataContext

        /**

        * @copydoc MAknsDataContext::ReserveItemL()

        *

        * CAknsContainerDataContext implementation forwards request to the

        * root data context of application skin item.        

        */

        void ReserveItemL( const TAknsItemID& aID );

        /**

        * @copydoc MAknsDataContext::ReleaseItem()

        *

        * CAknsContainerDataContext ignores release requests. Items are 

        * released by destructor when the lifetime of the context ends.        

        */

        void ReleaseItem( const TAknsItemID& aID );

    private: // Private constructors

        /**

        * C++ default constructor.

        *

        * @internal

        */

        CAknsContainerDataContext();

    private: // Data

        /**

        * Array for storing IDs of reserved items.

        */

        RAknsItemIDArray iIDArray;

    };

#endif // AKNSCONTAINERDATACONTEXT_H

// End of File