diff -r 000000000000 -r 72b543305e3a messagingappbase/msgeditor/viewinc/MsgAsyncControlObserver.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/messagingappbase/msgeditor/viewinc/MsgAsyncControlObserver.h	Thu Dec 17 08:44:11 2009 +0200
@@ -0,0 +1,84 @@
+/*
+* Copyright (c) 2007 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description:  MsgAsyncControlObserver  declaration
+*
+*/
+
+
+
+#ifndef MMSGASYNCCONTROLOBSERVER_H
+#define MMSGASYNCCONTROLOBSERVER_H
+
+// ========== INCLUDE FILES ================================
+
+// ========== CONSTANTS ====================================
+
+// ========== MACROS =======================================
+
+// ========== DATA TYPES ===================================
+
+// Order is important. Do not change unless you know what you do.
+enum TMsgAsyncControlState
+    {
+    EMsgAsyncControlStateIdle = 0,
+    EMsgAsyncControlStateOpening,
+    EMsgAsyncControlStateBuffering,
+    EMsgAsyncControlStateReady,
+    EMsgAsyncControlStateAboutToPlay,
+    EMsgAsyncControlStatePlaying,
+    EMsgAsyncControlStatePaused,
+    EMsgAsyncControlStateStopped,
+    EMsgAsyncControlStateNoRights,
+    EMsgAsyncControlStateCorrupt,       // cannot recover
+    EMsgAsyncControlStateError
+    };
+
+
+// ========== FUNCTION PROTOTYPES ==========================
+
+// ========== FORWARD DECLARATIONS =========================
+class CMsgBaseControl;
+
+// ========== CLASS DECLARATION ============================
+
+/**
+* MMsgAsyncControlObserver
+*/
+class MMsgAsyncControlObserver
+    {
+    public: // new methods
+
+        /**
+        * Call back function for reporting asynchronous control state machine state has been changed
+        * to observer.
+        *
+        * @param aControl - Changed asynchrnous control.
+        * @param aNewState - New state of the control.
+        * @param aOldState - Old state of the control.
+        */
+        virtual void MsgAsyncControlStateChanged( CMsgBaseControl& aControl,
+                                                  TMsgAsyncControlState aNewState,
+                                                  TMsgAsyncControlState aOldState ) = 0;
+        
+        /**
+        * Call back function for reporting asynchronous control resource changes to observer.
+        *
+        * @param aControl - Changed MediaControl.
+        */                                          
+        virtual void MsgAsyncControlResourceChanged( CMsgBaseControl& aControl, TInt aType ) = 0;
+    };
+
+#endif // MMSGASYNCCONTROLOBSERVER_H
+
+// End of File