diff -r 000000000000 -r f72a12da539e menufw/hierarchynavigator/hnengine/inc/hninterface.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/menufw/hierarchynavigator/hnengine/inc/hninterface.h	Thu Dec 17 08:40:49 2009 +0200
@@ -0,0 +1,146 @@
+/*
+* Copyright (c) 2007 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:   Interface for Hierarchy Navigator
+*
+*/
+
+
+
+#ifndef C_HNINTERFACE_H
+#define C_HNINTERFACE_H
+
+#include "hneventgenerator.h"
+
+class CHnSuiteModel;
+class CLiwGenericParamList;
+
+/**
+ * @ingroup group_hnengine
+ * An interface for edit mode. Used by hierarchy navigator to track edit mode state status change.
+ *
+ * @lib hnengine
+ * @since S60 v5.0
+ */
+class MHnEditModeInterface
+    {
+public:
+    /**
+     * Sets edit mode.
+     * 
+     * @since S60 v5.0
+     * @param aEditMode Parametr sets edit mode to EFlase/Etrue.
+     */
+    virtual void SetEditModeL( TBool aEditMode ) = 0;
+    };
+
+/**
+ * @ingroup group_hnengine
+ * Interface for Multimedia Menu to use Hierarchy Navigator engine. The functionality of this interface are
+ * suite model event issues like loading a model, counting the models currently loaded or loading the root
+ * suite.
+ *
+ * @lib hnengine
+ * @since S60 v5.0
+ */
+NONSHARABLE_CLASS( CHnInterface ) : public CBase, 
+                                    public MHnEditModeInterface,
+                                    public MHnEventGenerator
+    {
+public:
+
+    /**
+     * Fetches and constructs data structres, needed by Multimedia
+     * Menu to display suites.
+     *
+     * @since S60 v5.0
+     * @return Return last loaded suite model on the stack.
+     */
+    virtual CHnSuiteModel* GetLastSuiteModelL() = 0;
+    
+    /**
+     * Fetches and constructs data structres, needed by Multimedia
+     * Menu to display suites.
+     *
+     * @since S60 v5.0
+     * @return Return last loaded suite model on the stack.
+     */
+    virtual CHnSuiteModel* GetParentSuiteModelL() = 0;
+
+    /**
+     * Get count of suite models on the stack.
+     * 
+     * @since S60 v5.0
+     * @return Count of suite models on the stack.
+     */
+    virtual TInt GetSuiteModelsCountL() = 0;
+    
+    /**
+     * Checks if suite model is loaded.
+     * 
+     * @since S60 v5.0
+     * @return ETrue if suite model is loaded, otherwise EFalse.
+     */
+    virtual TBool SuiteModelLoadedL( TInt aId ) = 0;
+      
+    /**
+     * Handles back event coming from the UI.
+     *
+     * @since S60 v5.0
+     * @param aGenre Suite's name given by genre name on
+     *               which perform back event.
+     * @param aIterations Number of iterations.
+     * @return Status code.
+     */
+    virtual TInt HandleBackEventL( const TDesC& aGenre,
+            TInt aIterations = KModelCountForRoot ) = 0;
+    
+    /**
+     * Loads suite hierarchy specified in URI.
+     *
+     * @since S60 v5.0
+     * @param aUri The URI path consist of suite's name(s) to load to the stack.
+     */
+    virtual void LoadSuitesFromUriL( const TDesC8& aUri ) = 0;
+    
+    /**
+     * Resets MD Model and Suite Container.
+     *
+     * @since S60 v5.0
+     */
+    virtual void ResetModelsL() = 0;
+    
+    /**
+     * Loads default root suite
+     * 
+     * @since S60 v5.0
+     * @param aSuiteParams Suite parameters.
+     * @return Status error code.
+     */
+    virtual TInt InitializeL( CLiwGenericParamList& aSuiteParams ) = 0;
+    
+    /**
+     * Enables to issue a request to Hn engine.
+     * 
+     * @since S60 v5.0
+     * @param aParam Input Parameters.
+     * @param aOutput Target list for output.  
+     */
+    virtual void HandleRequestL( const CLiwGenericParamList& aParam, 
+                         CLiwGenericParamList* aOutput = NULL ) = 0; 
+    
+    };
+
+#endif  // C_HNINTERFACE_H
+
+