--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/menufw/hierarchynavigator/hnpresentationmodel/inc/hneventhandler.h	Thu Dec 17 08:40:49 2009 +0200
@@ -0,0 +1,190 @@
+/*
+* Copyright (c) 2007-2008 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:  event handler class
+*
+*/
+
+
+#ifndef C_HNEVENTHANDLER_H
+#define C_HNEVENTHANDLER_H
+
+#include <liwcommon.h>
+
+class CHnMetaDataModel;
+class CHnMdAction;
+class MLiwInterface;
+class CLiwServiceHandler;
+class CLiwGenericParamList;
+class CHnMdBaseKey;
+class TLiwVariant;
+class CHnMdItem;
+class CHnActionModel;
+class MHnMdModelEventObserver;
+class CHnServiceHandler;
+class MHnControllerInterface;
+
+/**
+ *  Event handler class.
+ * 
+ *  Event Handler is designed to handle events. 
+ *  It reveives an event id from the UI, 
+ *  mapps this event into an appropriate action, 
+ *  and runs this action.
+ *
+ *  @lib hnpresentationmodel
+ *  @since S60 5.0
+ *  @ingroup group_hnpresentationmodel
+ */
+NONSHARABLE_CLASS(CHnEventHandler) : public CBase, public MLiwNotifyCallback
+{
+public: // Constructors and destructor
+
+   /**
+    * Two-phased constructor.
+    * 
+    * @since S60 5.0
+    * @param aModelObserver Model event observer.
+    * @param aController Interface enabling to issues request to Hn engine.    
+    * @return Fully constructed object.
+    */
+    static CHnEventHandler* NewL( MHnMdModelEventObserver& aModelObserver,
+            MHnControllerInterface& aController );
+
+   /**
+    * Two-phased constructor.
+    * 
+    * @since S60 5.0
+    * @param aModelObserver Model event observer.
+    * @param aController Interface enabling to issues request to Hn engine.
+    * @return Fully constructed object.
+    */
+    static CHnEventHandler* NewLC( MHnMdModelEventObserver& aModelObserver,
+            MHnControllerInterface& aController);
+    
+   /**
+    * Destructor.
+    * 
+    * @since S60 5.0
+    */
+    ~CHnEventHandler();    
+    
+    /**
+     * Executes the action that was found in the Model.
+     * 
+     * @since S60 v3.2
+     * @see CHnActionModel
+     * @param aActionModel A pointer to the object of the CHnActionModel class.
+     * @return Error code. KErrNone in case of a correct execution (even if
+               given action was not found). KErrNotFound in case of incorrect
+               action parameters.
+     */
+    IMPORT_C TInt ExecuteActionL( CHnActionModel* aActionModel );
+       
+private:
+
+   /**
+    * Constructor for performing 1st stage construction
+    * 
+    * @since S60 5.0
+    * @param aModelObserver A model event observer reference.
+    * @param aController A HH controller reference.
+    */
+    CHnEventHandler( MHnMdModelEventObserver& aModelObserver,
+                     MHnControllerInterface& aController );
+
+   /**
+    * EPOC default constructor for performing 2nd stage construction
+    * 
+    * @since S60 5.0
+    */
+    void ConstructL();
+
+    /**
+     * Notifies UI about actions that can be passed back to the UI,
+     * i.e. openning nested suites, widget change.
+     * 
+     * @since S60 5.0
+     * @param aActionModel Model of the action.
+     * @return Error code
+     */
+    TInt ExecuteInternalActionL( CHnActionModel* aActionModel );
+
+    /**
+     * Executes action from Extension Manager.
+     * 
+     * @since S60 v5.0
+     * @param aActionModel Model of the action.
+     * @return Error code
+     */
+    TInt ExecuteExtensionManagerActionL( CHnActionModel* aActionModel );
+
+    /**
+     * Uses default mechanism to execute an action.
+     * 
+     * @since S60 v5.0
+     * @param aActionModel Model of the action.
+     * @return Error code
+     */
+    TInt ExecuteStandardActionL( CHnActionModel* aActionModel );
+        
+    /**
+     * Extracts extension uid from the action.
+     * 
+     * @since S60 v5.0
+     * @param aInterface Interface to invoke action on.
+     * @param aUid The resulting UID.
+     * @return Error code
+     */
+    TInt ExtractUidFromActionL( const TDesC8& aInterface, TUid& aUid );
+
+    
+// from MLiwNotifyCallback
+public :    
+	
+    /**
+     * Handles notification.
+     * 
+     * @param aCmdId The Id of the command triggered.
+     * @param aEventId The Id of the event.
+     * @param aEventParamList Parameters to event.
+     * @param aInParamList Input parameter list.
+     * 
+     * @return Error code.
+     */
+    TInt HandleNotifyL( TInt aCmdId, TInt aEventId,
+            CLiwGenericParamList& aEventParamList,
+            const CLiwGenericParamList& aInParamList );
+        
+private: // data
+    
+    /**
+     * Not own.
+     * Reference to HnEngine - Event observer.
+     */
+    MHnMdModelEventObserver& iEventObserver;
+    
+    /**
+     * Own.
+     */
+    CHnServiceHandler* iServiceHandler;
+    
+    /**
+     * Not own.
+     * Reference to App UI - Event observer.
+     */
+    MHnControllerInterface& iControllerInterface;
+
+};
+
+#endif // C_HNEVENTHANDLER_H