1 /*

     2 * Copyright (c) 2007 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:  Command validator callback class definition.

    15 *

    16 */

    17 

    18 

    19 #ifndef T_VTUICMDVALIDATORCALLBACK_H

    20 #define T_VTUICMDVALIDATORCALLBACK_H

    21 

    22 #include <e32base.h>

    23 

    24 /**

    25  *  MVtUiCmdValidatorCallBack

    26  *

    27  *  Command validator callback API.

    28  *

    29  *  @since S60 v3.2

    30  */

    31 class MVtUiCmdValidatorCallBack

    32     {

    33 

    34 public:

    35 

    36     /**

    37      * Invokes callback call.

    38      */

    39     virtual TBool Call( TInt ) const = 0;

    40 

    41     };

    42 

    43 /**

    44  *  TVtUiCmdValidatorCallBack

    45  *

    46  *  Validator callback wrapper to maintain type safety. Also allows use of

    47  *  different types of instances for invocation of callback.

    48  *

    49  *  @since S60 v3.2

    50  */

    51 template < class T >

    52 NONSHARABLE_CLASS( TVtUiCmdValidatorCallBack )

    53 : public MVtUiCmdValidatorCallBack

    54     {

    55 

    56     // Callback method type definition

    57     typedef TBool ( T::*TCallBackMethod )( TInt ) const;

    58 

    59 public:

    60 

    61     /**

    62      * Constructor

    63      *

    64      * @param aInstance Instance on which callback method will be called.

    65      * @param aMethod Callback method to be called.

    66      */

    67     TVtUiCmdValidatorCallBack( const T& aInstance, TCallBackMethod aMethod );

    68 

    69     /**

    70      * Executes callback.

    71      *

    72      * @param aParameter Callback parameter, e.g. command Id or resource Id.

    73      * @return Callback result.

    74      */

    75     TBool Call( TInt aParameter ) const;

    76 

    77 private:

    78 

    79     // Instance from which callback method will be invoke

    80     const T* iInstance;

    81 

    82     // Callback method pointer

    83     TCallBackMethod iMethod;

    84 

    85     };

    86 

    87 #include "tvtuicmdvalidatorcallback.inl"

    88 

    89 #endif // T_VTUICMDVALIDATORCALLBACK_H