/*+
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* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).+
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* All rights reserved.+
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* This component and the accompanying materials are made available+
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* under the terms of "Eclipse Public License v1.0"+
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* which accompanies this distribution, and is available+
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".+
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*+
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* Initial Contributors:+
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* Nokia Corporation - initial contribution.+
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*+
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* Contributors:+
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*+
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* Description:  MsgAsyncControlObserver  declaration+
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*+
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*/+
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#ifndef MMSGASYNCCONTROLOBSERVER_H+
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#define MMSGASYNCCONTROLOBSERVER_H+
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+
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// ========== INCLUDE FILES ================================+
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+
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// ========== CONSTANTS ====================================+
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+
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// ========== MACROS =======================================+
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+
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// ========== DATA TYPES ===================================+
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+
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// Order is important. Do not change unless you know what you do.+
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enum TMsgAsyncControlState+
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    {+
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    EMsgAsyncControlStateIdle = 0,+
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    EMsgAsyncControlStateOpening,+
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    EMsgAsyncControlStateBuffering,+
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    EMsgAsyncControlStateReady,+
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    EMsgAsyncControlStateAboutToPlay,+
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    EMsgAsyncControlStatePlaying,+
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    EMsgAsyncControlStatePaused,+
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    EMsgAsyncControlStateStopped,+
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    EMsgAsyncControlStateNoRights,+
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    EMsgAsyncControlStateCorrupt,       // cannot recover+
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    EMsgAsyncControlStateError+
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    };+
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+
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+
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// ========== FUNCTION PROTOTYPES ==========================+
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+
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// ========== FORWARD DECLARATIONS =========================+
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class CMsgBaseControl;+
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+
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// ========== CLASS DECLARATION ============================+
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+
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/**+
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* MMsgAsyncControlObserver+
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*/+
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class MMsgAsyncControlObserver+
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    {+
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    public: // new methods+
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+
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        /**+
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        * Call back function for reporting asynchronous control state machine state has been changed+
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        * to observer.+
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        *+
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        * @param aControl - Changed asynchrnous control.+
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        * @param aNewState - New state of the control.+
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        * @param aOldState - Old state of the control.+
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        */+
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        virtual void MsgAsyncControlStateChanged( CMsgBaseControl& aControl,+
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                                                  TMsgAsyncControlState aNewState,+
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                                                  TMsgAsyncControlState aOldState ) = 0;+
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        +
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        /**+
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        * Call back function for reporting asynchronous control resource changes to observer.+
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        *+
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        * @param aControl - Changed MediaControl.+
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        */                                          +
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        virtual void MsgAsyncControlResourceChanged( CMsgBaseControl& aControl, TInt aType ) = 0;+
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    };+
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+
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#endif // MMSGASYNCCONTROLOBSERVER_H+
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+
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// End of File+
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