--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/satengine/SatServer/inc/MSatSystemStateObserver.h	Tue Feb 02 01:11:09 2010 +0200
@@ -0,0 +1,91 @@
+/*
+* Copyright (c) 2002-2005 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:  Observer for system state changes.
+*
+*/
+
+
+
+#ifndef MSATSYSTEMSTATEOBSERVER_H
+#define MSATSYSTEMSTATEOBSERVER_H
+
+//  INCLUDES
+#include <e32std.h>
+
+// CLASS DECLARATION
+
+/**
+*  Observer for system state changes.
+*
+*  @lib SatSystemState.lib
+*  @since Series 60 3.0
+*/
+class MSatSystemStateObserver
+    {
+    public: // New functions
+
+        /**
+        * Notifies that system state changed.
+        */
+        virtual void StateChanged() {};
+
+        /**
+        * Notifies that system state changed.
+        * @param aValue The new value that has changed.
+        */
+        virtual void StateChanged( const TInt /*aValue*/ ) {};
+
+        /**
+        * Notifies that system state changed.
+        * @param aValue The new value that has changed.
+        */
+        virtual void StateChanged( const TReal& /*aValue*/ ) {};
+
+        /**
+        * Notifies that system state changed.
+        * @param aValue The new value that has changed.
+        */
+        virtual void StateChanged( const TDesC8& /*aValue*/ ) {};
+
+        /**
+        * Notifies that system state changed.
+        * @param aValue The new value that has changed.
+        */
+        virtual void StateChanged( const TDesC16& /*aValue*/ ) {};
+
+    protected:  // New functions
+
+        /**
+        * Destructor.
+        */
+        virtual ~MSatSystemStateObserver() {};
+
+        /**
+        * C++ default constructor.
+        */
+        MSatSystemStateObserver() {};
+
+    private:
+
+        // Prohibit copy constructor if not deriving from CBase.
+        MSatSystemStateObserver( const MSatSystemStateObserver& );
+
+        // Prohibit assigment operator if not deriving from CBase.
+        MSatSystemStateObserver& operator=( const MSatSystemStateObserver& );
+
+    };
+
+#endif      // MSATSYSTEMSTATEOBSERVER_H
+
+// End of File