/*

* Copyright (c) 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:  MTCStatePool interface declaration.

*

*/

#ifndef TCSTATEPOOL_H

#define TCSTATEPOOL_H

// INCLUDES

#include <e32std.h>

// FORWARD DECLARATIONS

class CTCState;

// CLASS DECLARATION

/**

*  State pool interface.

*  State classes can use this interface to manipulate

*  current state.

*

*  @lib None

*  @since S60 5.0

*/

NONSHARABLE_CLASS( MTCStatePool )

    {

    public:

        /**

        * Returns current state. NULL if state not found.

        *

        * @return TTCState

        */

        virtual CTCState* CurrentState() const = 0;

        /**

        * Returns prvious state. NULL if state not found.

        * 

        * @return TTCState

        */

        //virtual CTCState* PreviousState() const = 0;

        /**

        * Changes the current state.

        * New state will be notified about state entry.

        * Current state will be notified about state exit.

        * 

        * @param aStateId The ID of the new state.

        */

        virtual void ChangeStateL( TInt aStateId ) = 0;

};

#endif // TCSTATEPOOL_H

// End of File