--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/viewframework/views/listview/inc/glxpreviewthumbnailbinding.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,155 @@
+/*
+* Copyright (c) 2008-2009 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 : Class header for preview thumbnail in list view
+*
+*/
+
+
+#ifndef _GLXPREVIEWTHUMBNAILBINDING_H_
+#define _GLXPREVIEWTHUMBNAILBINDING_H_
+
+
+#include "glxbinding.h"              // The binding is created by the binding set factory.
+#include "glxmedialistiterator.h"    // Interface for going through items in the list in a  non-sequential order
+#include "mglxmedialistobserver.h"   // Observes for changes in media list
+#include <memory>                    
+
+
+class GlxThumbnailVariantType;
+class CGlxThumbnailContext;          // Fetch context to retrieve thumbnails
+
+/**
+ * Observer interface
+ */
+class MPreviewTNObserver 
+    {
+public:
+    virtual void PreviewTNReadyL(CFbsBitmap* aBitmap, CFbsBitmap* aMask, TInt aIndex) = 0;
+    };
+    
+// CLASS DECLARATION
+/**
+ * Implementation of preview thumbnail binding for the 
+ * list view. 
+ * 
+ */ 
+    
+ NONSHARABLE_CLASS(CGlxPreviewThumbnailBinding) : public CBase,
+                                                  public MGlxMediaListObserver
+ 	{
+ public:
+ 
+	/**
+	  * Two phase construction
+	  * @param aMulTag Mul field that the binding corresponds to
+	  */
+	static CGlxPreviewThumbnailBinding* NewL (MPreviewTNObserver& aObserver);
+	
+	/**
+	 * Two phase construction
+	 */
+	static CGlxPreviewThumbnailBinding* NewLC(MPreviewTNObserver& aObserver ); // takes ownership
+
+	
+	/**
+	 * Destructor
+	 */
+	~CGlxPreviewThumbnailBinding();
+	
+	/**
+	 * HasFirstThumbnail
+	 */
+	TBool HasFirstThumbnail( const RArray< TMPXAttribute >& aAttributes );
+	
+private:
+
+	 /**
+	 * Constructor
+	 */
+	CGlxPreviewThumbnailBinding(MPreviewTNObserver& aObserver);
+	
+	/**
+	 * Two phase construction
+	 */
+	void ConstructL();
+
+public:	
+      void HandleItemChangedL(const CMPXCollectionPath& aPath, TBool aPopulateListTNs);
+      void StartTimer(TBool aPopulateListTNs);
+      
+      // From MGlxMediaListObserver
+      void HandleItemAddedL( TInt aStartIndex, TInt aEndIndex, MGlxMediaList* aList );
+      void HandleItemRemovedL( TInt aStartIndex, TInt aEndIndex, MGlxMediaList* aList );
+      void HandleAttributesAvailableL( TInt aItemIndex, 
+          const RArray<TMPXAttribute>& aAttributes, MGlxMediaList* aList );    
+      void HandleFocusChangedL( NGlxListDefs::TFocusChangeType aType, 
+      TInt aNewIndex, TInt aOldIndex, MGlxMediaList* aList );
+      void HandleItemSelectedL(TInt aIndex, TBool aSelected, MGlxMediaList* aList );
+      void HandleMessageL( const CMPXMessage& aMessage, MGlxMediaList* aList );
+      void HandleError( TInt aError );
+      void HandleCommandCompleteL( CMPXCommand* aCommandResult, TInt aError, 
+          MGlxMediaList* aList );
+      void HandleMediaL( TInt aListIndex, MGlxMediaList* aList );
+      void HandleItemModifiedL( const RArray<TInt>& aItemIndexes, MGlxMediaList* aList );
+     
+private:
+	/**
+	 * IsTimeL
+	 */
+	static TInt IsTimeL( TAny* aSelf );
+	
+	/**
+	 * TimerTickedL
+	 */
+	void TimerTickedL();
+	
+private:
+	MPreviewTNObserver& iObserver;	
+	
+	// Timer that checks for the time expiration
+	CPeriodic* iTimer;
+	
+	//Medialist that holds the thumbnail information
+	MGlxMediaList* iMediaList;
+	
+	// Thumbnail context
+	CGlxThumbnailContext* iThumbnailContext;
+	
+	// for thumbnail context
+	TGlxSequentialIterator iThumbnailIterator;
+	
+	// Preview thumbnail index
+	TInt iProgressIndex;
+	
+	// flag that says whether timer has expired
+	TBool iTimerTicked;
+	
+	//flag will be true, when initially the first thumbnails for all the 
+	//items in the list are populated.
+	TBool iPopulateListTNs;
+
+    //it holds the initial number of thumbnail to be displayed
+    RArray<TInt> iPreviewItemCount;
+    
+    TSize iGridIconSize;
+    
+    // Holds the numbers of trials count,after which PreviewTNReady callback
+    // has to be called
+    TInt iTrialCount;
+    
+    TInt iTrial;
+};
+    
+
+#endif //_GLXPREVIEWTHUMBNAILBINDING_H_