diff -r 8ee96d21d9bf -r 7e0eff37aedb gssettingsuis/Gs/GSApplication/Inc/GSEngineInterface.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gssettingsuis/Gs/GSApplication/Inc/GSEngineInterface.h	Wed Sep 01 12:20:44 2010 +0100
@@ -0,0 +1,79 @@
+/*
+* Copyright (c) 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:  GS engine interface.
+*
+*/
+
+
+#ifndef GS_ENGINE_INTERFACE_H
+#define GS_ENGINE_INTERFACE_H
+
+// INCLUDES
+#include <e32base.h>
+
+/**
+* Interface to GS engine. Provides functions for creating, deleting, getting 
+* and setting settings data. Supported data types are Tint, Treal, TDesC8 and 
+* TDesC16.
+*/
+class MGSEngine
+    {
+public:
+
+    virtual void MGSEngine() = 0;
+    
+    /**
+    * Adds an observer. Does not take the ownership of the observer. The 
+    * observer will get notification whenever the observed data is changed.
+    */
+    virtual void AddObserverL(MGSEngineObserver* aObserver, TUnt32 aObservedId) = 0;
+    
+    /**
+    * Removes an observer.
+    */
+    virtual void RemoveObserver(MGSEngineObserver* aObserver) = 0;
+    
+    virtual TInt Create(TUint32 aId, TInt aVal) = 0;
+	virtual TInt Create(TUint32 aId, const TReal& aVal) = 0;
+	virtual TInt Create(TUint32 aId, const TDesC8& aVal) = 0;
+	virtual TInt Create(TUint32 aId, const TDesC16& aVal) = 0;
+	
+	virtual TInt Delete(TUint32 aId) = 0;
+
+    virtual TInt Get(TUint32 aId, TInt& aVal) = 0;
+	virtual TInt Set(TUint32 aId, TInt aVal) = 0;
+	
+	virtual TInt Get(TUint32 aId, TReal& aVal) = 0;
+	virtual TInt Set(TUint32 aId, const TReal& aVal) = 0;
+
+	virtual TInt Get(TUint32 aId, TDes8& aVal) = 0;
+	virtual TInt Set(TUint32 aId, const TDesC8& aVal) = 0;
+
+	virtual TInt Get(TUint32 aId, TDes16& aVal) = 0;
+	virtual TInt Set(TUint32 aId, const TDesC16& aVal) = 0;
+    
+    
+    };
+
+/**
+* Observer for GS engine. 
+*/
+class MGSEngineObserver
+    {
+    virtual void ValueChanged(TUint32 aId) = 0;
+    };
+
+#endif //GS_ENGINE_INTERFACE_H
+
+// End of File
\ No newline at end of file