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:  MsgAsyncControlObserver  declaration

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef MMSGASYNCCONTROLOBSERVER_H

    21 #define MMSGASYNCCONTROLOBSERVER_H

    22 

    23 // ========== INCLUDE FILES ================================

    24 

    25 // ========== CONSTANTS ====================================

    26 

    27 // ========== MACROS =======================================

    28 

    29 // ========== DATA TYPES ===================================

    30 

    31 // Order is important. Do not change unless you know what you do.

    32 enum TMsgAsyncControlState

    33     {

    34     EMsgAsyncControlStateIdle = 0,

    35     EMsgAsyncControlStateOpening,

    36     EMsgAsyncControlStateBuffering,

    37     EMsgAsyncControlStateReady,

    38     EMsgAsyncControlStateAboutToPlay,

    39     EMsgAsyncControlStatePlaying,

    40     EMsgAsyncControlStatePaused,

    41     EMsgAsyncControlStateStopped,

    42     EMsgAsyncControlStateNoRights,

    43     EMsgAsyncControlStateCorrupt,       // cannot recover

    44     EMsgAsyncControlStateError

    45     };

    46 

    47 

    48 // ========== FUNCTION PROTOTYPES ==========================

    49 

    50 // ========== FORWARD DECLARATIONS =========================

    51 class CMsgBaseControl;

    52 

    53 // ========== CLASS DECLARATION ============================

    54 

    55 /**

    56 * MMsgAsyncControlObserver

    57 */

    58 class MMsgAsyncControlObserver

    59     {

    60     public: // new methods

    61 

    62         /**

    63         * Call back function for reporting asynchronous control state machine state has been changed

    64         * to observer.

    65         *

    66         * @param aControl - Changed asynchrnous control.

    67         * @param aNewState - New state of the control.

    68         * @param aOldState - Old state of the control.

    69         */

    70         virtual void MsgAsyncControlStateChanged( CMsgBaseControl& aControl,

    71                                                   TMsgAsyncControlState aNewState,

    72                                                   TMsgAsyncControlState aOldState ) = 0;

    73         

    74         /**

    75         * Call back function for reporting asynchronous control resource changes to observer.

    76         *

    77         * @param aControl - Changed MediaControl.

    78         */                                          

    79         virtual void MsgAsyncControlResourceChanged( CMsgBaseControl& aControl, TInt aType ) = 0;

    80     };

    81 

    82 #endif // MMSGASYNCCONTROLOBSERVER_H

    83 

    84 // End of File