1 /*

     2 * Copyright (c) 2008 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:  Volume control adjusts engine side volume values.

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef CVTUIVOLUMECONTROL_H

    21 #define CVTUIVOLUMECONTROL_H

    22 

    23 

    24 #include    <e32base.h>

    25 #include    <mvtengcommandobserver.h>

    26 #include    <mvtengaudio.h>

    27 

    28 class MVtEngCommandHandler;

    29 class MVtUiEngineCommandManager;

    30 class CVtUiFeatureManager;

    31 

    32 

    33 /**

    34 *  Volume control adjusts engine side volume values.

    35 *

    36 *  @since Series 60 v5.0

    37 */

    38 class CVtUiVolumeControl

    39     : public CBase,

    40       private MVtEngCommandObserver

    41     {

    42     public: // Constructors and destructor

    43 

    44     // Type for volume settings.

    45     typedef MVtEngAudio::TVtEngOutputVolume TVolume;

    46 

    47     /**

    48     * Constructor.

    49     *

    50     * @param aSelfPtr optional pointer to itself.

    51     * @param aCommandHandler command handler.

    52     * @param aAudio audio interface.

    53     * @param aCommandManager command manager.

    54     * @param aFeatureManager Reference to feature manager.

    55     */

    56     CVtUiVolumeControl(

    57         MVtEngCommandHandler& aCommandHandler,

    58         MVtEngAudio& aAudio,

    59         MVtUiEngineCommandManager& aCommandManager,

    60         CVtUiFeatureManager& aFeatureManager );

    61 

    62     /*

    63     * 2nd phase constructor

    64     */

    65     void ConstructL();

    66 

    67     /**

    68     * Destructor.

    69     */

    70     ~CVtUiVolumeControl();

    71 

    72 public: // New functions

    73 

    74     // Adjust volume to new value

    75     void AdjustVolumeL( TVolume aVolume );

    76         

    77 private:

    78 

    79     /**

    80     * @see MVtEngCommandObserver::HandleVTCommandPerformedL.

    81     */

    82     virtual void HandleVTCommandPerformedL(

    83         TVtEngCommandId aCommand,

    84         const TInt aError );

    85     

    86     // Checks if volume is changed in slider

    87     TBool IsVolumeChangedL();

    88 

    89 private:

    90 

    91     // Reference to command handler.

    92     MVtEngCommandHandler& iCommandHandler;

    93 

    94     // Reference to audio interface.

    95     MVtEngAudio& iAudio;

    96 

    97     // Reference to command manager.

    98     MVtUiEngineCommandManager& iCommandManager;

    99 

   100     // ETrue if command is performed.

   101     TBool iCommandPerformed;

   102 

   103     // Volume being updated to engine.

   104     TVolume iVolume;

   105 

   106     // Volume pointer descriptor.

   107     TPtrC8 iVolumePtr;

   108     

   109     // Reference to featuremanager

   110     CVtUiFeatureManager& iFeatureManager;

   111     

   112     // Is control adjusting volume

   113     TBool iIsActive;

   114     };

   115 

   116 #endif      // CVtUiVolumeControl_H

   117 

   118 // End of File