1 /*

     2 * Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:  Videoteleng extension base class 

    15 *

    16 */

    17 

    18 

    19 #ifndef CVTENGEXTENSIONSBASE_H

    20 #define CVTENGEXTENSIONSBASE_H

    21 

    22 //  INCLUDES

    23 #include <e32base.h>

    24 #include "vtengcommands.h"

    25 

    26 // FORWARD DECLARATIONS

    27 class CVtEngOperation;

    28 

    29 // CLASS DECLARATION

    30 

    31 /**

    32 *  Videoteleng extension base class.

    33 *

    34 *  @lib videoteleng.lib

    35 *  @since S60 v3.2

    36 */

    37 NONSHARABLE_CLASS ( CVtEngExtensionBase ): public CBase

    38     

    39     {

    40     public: // pure virtuals.

    41         

    42         /**

    43         * Returns extension API interface 

    44         * @return API IF as TAny pointer

    45         */

    46         virtual TAny* GetInterface() = 0;

    47         

    48         /**

    49         * Handles requested extension operation

    50         * @param aOp requested operation pointer

    51         * @return TBool if operation succeed or not 

    52         */

    53         virtual TBool HandleL( CVtEngOperation* aOp ) = 0;

    54         

    55         /**

    56         * Validates requested extension command

    57         * @param aCommandId requested command identifier (TInt)

    58         * @return TBool if command is valid or not 

    59         */

    60         virtual TBool ValidateCommand( const TVtEngCommandId aCommandId ) = 0;

    61         

    62         /**

    63         * Gets extension UID

    64         * @return extension UID

    65         */

    66         const TUid& Uid() const;

    67         

    68     protected:// Constructor.

    69         /*

    70         * C++ default constructor.

    71         */        

    72         CVtEngExtensionBase( TUid aExtensionUid );

    73     

    74     private:

    75         

    76         // Extension UID 

    77         const TUid iExtensionUid;

    78     };

    79         

    80 #endif //CVTENGEXTENSIONSBASE_H