--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sysstatemgmt/systemstatereferenceplugins/clayer/inc/ssmpropertyobserver.h	Tue Feb 02 00:53:00 2010 +0200
@@ -0,0 +1,75 @@
+// Copyright (c) 2008-2009 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:
+//
+
+#ifndef __SSMPROPERTYOBSERVER_H__
+#define __SSMPROPERTYOBSERVER_H__
+
+#include <e32base.h>
+#include <e32property.h>
+#include <ssm/ssmutility.h>
+
+/**
+ * Provide an abstract class for observing RProperty value changes from the SSM Utility Server.
+ * 
+ * @publishedPartner
+ * @released
+ */
+class CSsmPropertyObserver : public CActive, public MSsmUtility
+{
+public:
+	
+	IMPORT_C CSsmPropertyObserver(TUid aCategory, TUint aKey);
+	
+	/**
+	 * Function that is called everytime the property for this observer changes.
+	 * 
+	 * This is also called once when the observation is first started using StartL().
+	 * 
+	 * @param aValue The new value for the observed property.
+	 * 
+	 * @return ETrue if this observer should continue to monitor, EFalse otherwise.
+	 * 
+	 * @note If EFalse is returned from this object then this object is not destroyed.
+	 * 
+	 * @publishedPartner
+	 * @released
+	 */
+	virtual TBool PropertyChangedL(TInt aValue) = 0; 
+	
+	// From MSsmUtility
+	IMPORT_C virtual void InitializeL();
+	IMPORT_C virtual void StartL();
+	IMPORT_C virtual void Release();
+	
+protected:
+	void doRunL();
+
+	IMPORT_C virtual ~CSsmPropertyObserver();
+	
+	// From CActive
+	IMPORT_C virtual void RunL();
+	IMPORT_C virtual void DoCancel();
+	IMPORT_C virtual TInt RunError(TInt aError);
+	
+protected:
+	const TUid iCategory;
+	const TUint iKey;
+	
+	RProperty iProperty;
+	
+	TInt iReserved[2];
+};
+
+#endif // __SSMPROPERTYOBSERVER_H__