1 /*

     2 * Copyright (c) 2009 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: 

    15 *

    16 */

    17 

    18 #ifndef MLCBRIGHTNESSCONTROL_H

    19 #define MLCBRIGHTNESSCONTROL_H

    20 

    21 // INCLUDES

    22 #include <e32std.h>

    23 

    24 // CLASS DECLARATION

    25 /**

    26 * Class for adjusting the brightness of a video.

    27 */

    28 class MLcBrightnessControl

    29     {

    30     public:

    31 

    32         /**

    33         * Returns the minimum brightness level.

    34         * @return the minimum brightness level

    35         */

    36         virtual TInt MinLcBrightnessL() = 0;

    37 

    38         /**

    39         * Returns the maximum brightness level.

    40         * @return the maximum brightness level

    41         */

    42         virtual TInt MaxLcBrightnessL() = 0;

    43 

    44         /**

    45         * Returns the current brightness level.

    46         * @return the current brightness level

    47         */

    48         virtual TInt LcBrightnessL() = 0;

    49 

    50         /**

    51         * Sets the brightness level.

    52         * @pre aValue >= MinLcBrightnessL && aValue <= MaxLcBrightnessL

    53         * @param aValue the new brightness level

    54         */

    55         virtual void SetLcBrightnessL( TInt aValue ) = 0;

    56         

    57         /**

    58         * Increments the brightness level by one step.

    59         */

    60         virtual void IncreaseLcBrightnessL() = 0;

    61         

    62         /**

    63         * Decrements the brightness level by one step.

    64         */

    65         virtual void DecreaseLcBrightnessL() = 0; 

    66     };

    67 

    68 #endif // MLCBRIGHTNESSCONTROL_H

    69 

    70 // end of file