diff -r 000000000000 -r f72a12da539e idlehomescreen/inc/xnpropertysubscriber.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/idlehomescreen/inc/xnpropertysubscriber.h	Thu Dec 17 08:40:49 2009 +0200
@@ -0,0 +1,128 @@
+/*
+* 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:
+* Subscribes properties from P&S
+ *
+*/
+
+#ifndef XNPROPERTYSUBSCRIBER_H
+#define XNPROPERTYSUBSCRIBER_H
+
+// System includes
+#include <e32base.h>
+#include <e32property.h>
+
+// Class declaration
+/**
+ * Observer for property change.
+ */
+class MXnPropertyChangeObserver
+    {
+public:
+    /**
+     * Property changed
+     *
+     * @since S60 5.1
+     * @param aKey key value
+     * @param aValue property value
+     */
+    virtual void PropertyChangedL( const TUint32 aKey, const TInt aValue ) = 0;
+    };
+
+/**
+ * Subcribes property from P&S and listen property changes
+ *
+ * @ingroup group_xnlayoutengine
+ * @lib xn3layoutengine.lib
+ * @since Series 60 5.0
+ */
+NONSHARABLE_CLASS( CXnPropertySubscriber ) : public CActive
+    {
+public:
+    /**
+     * Cancel and destroy
+     */
+    ~CXnPropertySubscriber();
+
+    /**
+    * Two-phased constructor.
+    *
+    * @param aUid P&S property category
+    * @param aKey P&S property key
+    * @param aObserver Given property change observer
+    */
+    static CXnPropertySubscriber* NewL(
+        const TUid aUid,
+        const TUint32 aKey,
+        MXnPropertyChangeObserver& aObserver );
+
+    /**
+    * Two-phased constructor.
+    *
+    * @param aUid P&S property category
+    * @param aKey P&S property key
+    * @param aObserver Given property change observer
+    */
+    static CXnPropertySubscriber* NewLC(
+        const TUid aUid,
+        const TUint32 aKey,
+        MXnPropertyChangeObserver& aObserver );
+
+private:
+    /**
+     * C++ constructor
+     */
+    CXnPropertySubscriber(
+        MXnPropertyChangeObserver& aObserver,
+        const TUint32 aKey );
+
+    /**
+     * Second-phase constructor
+     */
+    void ConstructL( const TUid aUid, const TUint32 aKey );
+
+private:
+    /**
+     * From CActive.
+     * Handle completion
+     */
+    void RunL();
+
+    /**
+     * From CActive.
+     * How to cancel me
+     */
+    void DoCancel();
+
+private:
+    // Data
+
+    /**
+     * Observer for property changes.
+     * Not own
+     */
+    MXnPropertyChangeObserver& iPropertyChangeObserver;
+
+    /**
+     * Property to listen
+     */
+    RProperty iProperty;
+
+    /**
+     * P&S property key
+     */
+    TUint32 iKey;
+    };
+
+#endif