--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/phonebookui/Phonebook2/NamesListExtension/inc/CPbk2AddFavoritesVisibility.h	Tue Feb 02 10:12:17 2010 +0200
@@ -0,0 +1,168 @@
+/*
+* Copyright (c) 2005-2007 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:  
+*
+*/
+
+
+#ifndef  CPBK2ADDFAVORITESVISIBILITY_H_
+#define  CPBK2ADDFAVORITESVISIBILITY_H_
+
+//  INCLUDES
+#include <e32base.h>
+
+// VPbk
+#include <MVPbkContactViewObserver.h>
+
+// Pbk2
+#include <MPbk2StoreConfigurationObserver.h>
+#include "MPbk2AddFavoritesVisibility.h"
+#include <MPbk2CmdItemVisibilityObserver.h>
+
+// FORWARD DECLARATIONS
+class MVPbkContactViewBase;
+class CPbk2AddFavoritesVisibilityImpl;
+class MPbk2ApplicationServices;
+
+/**
+ * In order to know whether or not "Add favorites" should be visible
+ * The following must be known:
+ * 
+ * (1) Are there Top Contacts? (favorites) 
+ * (2) Number of contacts in all contacts view
+ * (3) Whether "Settings / Memory selection" contains Phone memory
+ * (4) Store Configuration changes
+ *
+ * (1) & (2) require all contacts and top contacts database
+ * view creation and and error handling regarding those. 
+ *
+ * (4) requires store configuration observation & event handling
+ * 
+ * This class does all these and gathers all data needed for decesion
+ * and forwards it to CPbk2AddFavoritesVisibilityImpl class
+ */
+NONSHARABLE_CLASS( CPbk2AddFavoritesVisibility ) : public CBase,
+    public MVPbkContactViewObserver,
+    public MPbk2StoreConfigurationObserver
+	{
+	public: // Construction & destruction
+
+        /* @param aCmdId: a nameslist command item id
+         * @MPbk2ApplicationServices& aAppServices: Pbk2 App Services
+         * object.
+         */
+		static CPbk2AddFavoritesVisibility* NewL(		    
+		    TInt aCmdId, MPbk2ApplicationServices& aAppServices);
+		
+		~CPbk2AddFavoritesVisibility();
+    
+    public: // visibility observer setting
+    
+        /*
+        * Set's the observer for the impl class and  
+        * triggers and async callback to observer
+        *
+        * @param aObserver: (i.e. nameslistcontrol's ready state obj)
+        * obj who is interested in visibility on/off events
+        * 
+        */        
+        void SetVisibilityObserver
+            (MPbk2CmdItemVisibilityObserver* aObserver);          
+        
+        /*  
+         * Sets visibility
+         *
+         * @param aVisibility new visiblity value
+        */
+        void SetVisibility(TBool aVisibility);   
+        
+        /* 
+         * Get visibility
+         *
+         * @return visiblity value
+        */
+        TBool Visibility();        
+
+    private: // MPbk2StoreConfigurationObserver
+    
+        void ConfigurationChanged();
+ 
+        void ConfigurationChangedComplete();
+    
+        	
+	private: //	MVPbkContactViewObserver
+	    
+	    void ContactViewReady(
+	            MVPbkContactViewBase& aView );
+	            
+	    void ContactViewUnavailable(
+            MVPbkContactViewBase& aView );
+            
+	    void ContactAddedToView(
+            MVPbkContactViewBase& aView,
+            TInt aIndex,
+            const MVPbkContactLink& aContactLink );
+            
+	    void ContactRemovedFromView(
+            MVPbkContactViewBase& aView,
+            TInt aIndex,
+            const MVPbkContactLink& aContactLink );
+            
+	    void ContactViewError(
+            MVPbkContactViewBase& aView,
+            TInt aError,
+            TBool aErrorNotified );
+	    
+	private:
+	
+		CPbk2AddFavoritesVisibility(MPbk2ApplicationServices& aAppServices);
+	
+	    void ConstructL( TInt aCmdId );
+		
+        TBool IsContactDatabaseLoadedL() const;
+        TBool ObserveContactViewsL();
+		void StartObservingStoreConfigurationL();  
+        void Reset();
+		void HandleConfigurationChangedL();    
+        void ReadAddFavoritiesVisibilityKeyL();		                                          
+        void StopObservingStoreConfiguration();
+        void NotifyVisibilityChange();        
+        void UpdateContactCount(MVPbkContactViewBase& aView);
+        void SetContactCount(MVPbkContactViewBase& aView, TInt aCount);
+        TInt TopContactCount();
+        TInt AllContactsCount();        
+        void StartL();               
+	
+	private: // data
+	          
+	    // Ref: top contacts view
+	    MVPbkContactViewBase* iTopContactsView;
+
+	    // Ref: all contacts view
+	    MVPbkContactViewBase* iAllContactsView;	    	    
+	    
+	    // Handle to implementor in bridge pattern
+	    // Taking care of decesion logic on visibility plus
+	    // informing the visibility observer
+	    CPbk2AddFavoritesVisibilityImpl* iImpl;
+
+	    // Own:  top contact count if the view is in valid, KErrNotFound otherwise
+        TInt iTcCount;
+        // Own:  all contacts view count if the view is valid, KErrNotFound otherwise
+        TInt iAllContactsCount;    
+        // ref, used to reach view suplier & database views
+        MPbk2ApplicationServices& iApplicationServices;
+	};
+
+#endif /* CPBK2ADDFAVORITESVISIBILITY_H_*/