/*

* Copyright (c) 2007-2008 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:    Thin callback wrapper

 *

*/

// include guard for the whole file content

#ifndef __TSHWCALLBACK_H__

#define __TSHWCALLBACK_H__

/**

 * Helper class to construct a TCallBack from any 

 * public non static TInt (*method)() of a class

 * Usage:

 *          %ClassPointer% )

 * Example:

 *          this );

 */

template< class Object, TInt (Object::*Method)() >

NONSHARABLE_CLASS( TShwCallBack ) : public TCallBack

	{

	public:

		/**

		 * Constructor.

		 * @param aInstance the object instance of the class 

		 */

		inline TShwCallBack( Object* aInstance )

			: TCallBack( &DelegateL, aInstance )

			{}

	private:

		/**

		 * The callback delegator. Inlined as we dont want

		 * extra method to be created, static so that base

		 * class can call it without pointer to this.

		 * @param aInstance the instance to call back

		 * @return the return value for the TCallBack

		 */

		inline static TInt DelegateL( TAny* aInstance )

			{

			// Dispatch the call to the real objects method

			return ( static_cast< Object* >( aInstance )->*Method )();

			}

	};

#endif // __TSHWCALLBACK_H__