diff -r 3104fc151679 -r 9a48e301e94b servicewidget/servicewidgetdatapublisher/inc/mservicewidgetobservers.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/servicewidget/servicewidgetdatapublisher/inc/mservicewidgetobservers.h	Wed Sep 01 12:33:36 2010 +0100
@@ -0,0 +1,202 @@
+/*
+* Copyright (c) 2008 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:  all observer classes
+*
+*/
+
+
+#ifndef MSERVICEWIDGETOBSERVERS_H
+#define MSERVICEWIDGETOBSERVERS_H
+
+#include <cchtypes.h>
+#include "servicewidgetenums.hrh"
+/**
+ *  
+ *  Observer interface for messages handler	
+ *  @dll servicewidgetplugin
+ *  @since S60 5.0
+ */
+ 
+class  MServiceWidgetNewMessageObserver 
+	{
+	public:
+			/**
+	    	* Gets called when data update is available as new messgae recieved.
+	    	* Client can then decide wether to use the old one
+	    	* or the updated one.
+	    	* @param aSenderId, sender id
+	    	* @param aMessageText, new message details
+	       	*/
+	        virtual void HandleNewMessageL(const TDesC& aSenderId ,const TDesC& aMessageText )  = 0 ;
+	        
+	        /**
+	    	* unread message change notification
+	    	* Client can then decide wether to use the old one
+	       	*/      
+	        virtual void HandleCountChangedL() = 0 ;
+	      	
+		                
+	protected :
+			/**
+			* virtual destructor
+			*/
+			virtual ~MServiceWidgetNewMessageObserver()
+				{
+					
+				}
+	    
+			               
+	};
+
+/**
+ *  
+ *  Observer interface for presence handler	
+ *  @dll servicewidgetplugin
+ *  @since S60 5.0
+ */
+class  MServiceWidgetPresenceObserver 
+	{
+	public:
+		             
+	    /**
+         * Handler for own status change notification
+         */    
+        virtual void HandleOwnStatusChangeL(TWSPresenceStatus aStatus ) = 0;
+	
+		/**
+		* Handler for AllBuddiesPresenceInService method of MPresenceCacheReader.
+		*
+		* @param aErrorCode 
+		* @param aPresenceBuddyInfoList presence infos for all buddies requested. 
+		* Ownership to callee. Can be null if not found.
+		*/    
+		virtual void HandleChangeL( ) = 0 ;
+	    
+        /**
+        * from MServiceWidgetPresenceObserver
+        * Handler for AllBuddiesPresenceInService method of MPresenceCacheReader.
+        * @param aErrorCode 
+        * @param aPresenceBuddyInfoList presence infos for all buddies requested. 
+        * Ownership to callee. Can be null if not found.
+        */    
+		virtual void HandleBuddyPresenceChangeL(const TDesC& aBuddyId, 
+                                        TWSPresenceStatus aStatus,
+                                        const TDesC& aStatusText ) = 0 ;
+	    /**
+		* Gets called when data update is available as new messgae recieved.
+		* Client can then decide wether to use the old one
+		* or the updated one.
+		* @param aSenderId, sender name
+		* @param aMessageText, new message details
+		*/
+		virtual void HandleAddRequestL(const TDesC& aRequesterId )  = 0  ;
+	
+			              
+	protected :
+			/**
+			* virtual destructor
+			*/
+			virtual ~MServiceWidgetPresenceObserver()
+				{
+					
+				}
+	    
+			               
+};
+ 
+ /**
+ *  
+ *  Observer interface for session state handler	
+ *  @dll servicewidgetplugin
+ *  @since S60 5.0
+ */
+class  MServiceWidgetServiceStateObserver 
+	{
+	public:
+			
+	       /**
+	         * Handler for service state changes
+	         * param aState, service state
+	         */    
+	        virtual void HandleServiceStatusChangedL( TSWSTRegistrationState aState) = 0;
+	                 
+	protected :
+			/**
+			* virtual destructor
+			*/
+			virtual ~MServiceWidgetServiceStateObserver()
+				{
+					
+				}
+		               
+	};
+
+/**
+ *  
+ *  Observer interface for timer 	
+ *  @dll servicewidgetplugin
+ *  @since S60 5.0
+ */
+class  MServiceWidgetTimerObserver 
+	{
+	public:
+			/**
+	         * Handler for timer expiration
+	         */  
+	        virtual void HandleTimerExpiredL() = 0 ;
+	        
+	                
+	protected :
+			/**
+			* virtual destructor
+			*/
+			virtual ~MServiceWidgetTimerObserver()
+				{
+					
+				}
+	    
+			               
+	};
+
+/**
+ *  
+ *  Observer interface for handling ai foreground event	
+ *  @dll servicewidgetplugin
+ *  @since S60 5.0
+ */
+
+class MServiceWidgetEventObserver
+	{
+	public:
+		  
+	        /**
+	         * Handler for timer ai foreground event 
+	         */  
+	        virtual void HandleServiceEventL(const TDesC& aPublisherId, const TDesC8& aEvent,TDesC& aInstId ) = 0 ;
+	                    
+	                
+	protected :
+			/**
+			* virtual destructor
+			*/
+			virtual ~MServiceWidgetEventObserver()
+				{
+					
+				}	
+		
+	};
+#endif  // MSERVICEWIDGETOBSERVERS_H
+
+
+// End of File