--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uifw/AvKon/aknhlist/inc/akntreeordering.h	Tue Feb 02 01:00:49 2010 +0200
@@ -0,0 +1,72 @@
+/*
+* Copyright (c) 2006 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:  Base class for hierarchical list orderings.
+*
+*/
+
+
+#ifndef C_AKNTREEORDERING_H
+#define C_AKNTREEORDERING_H
+
+
+#include <e32base.h>
+
+class CAknTreeItem;
+
+
+/**
+ *  Tree ordering.
+ *
+ *  An instance of @c CAknTreeOrdering class specifies the order of children
+ *  of a tree node. The tree can be sorted by applying the ordering to every
+ *  node in the tree.
+ *
+ *  @lib aknhlist.lib
+ *  @since S60 v3.2
+ */
+NONSHARABLE_CLASS( CAknTreeOrdering ) : public CBase
+    {
+
+public:
+
+    /**
+     * Destructor.
+     */
+    ~CAknTreeOrdering();
+
+    /**
+     * Compares to tree items.
+     *
+     * @param aFirst First item.
+     *
+     * @param aSecond Second item.
+     *
+     * @return Positive, if the first item is greater than the second item;
+     *      negative, if the first item is less than the second item;
+     *      and zero, if the items are equal.
+     */
+    virtual TInt Compare( const CAknTreeItem& aFirst,
+        const CAknTreeItem& aSecond ) = 0;
+
+protected:
+
+    /**
+     * Default C++ constructor.
+     */
+    CAknTreeOrdering();
+
+    };
+
+
+#endif // C_AKNTREEORDERING_H