--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mpxplugins/viewplugins/views/collectionviewhg/inc/mpxcollectionviewhgtnloader.h	Thu Dec 17 08:45:05 2009 +0200
@@ -0,0 +1,101 @@
+
+
+/*
+* 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:  Thumbnail loader
+*
+*/
+
+#ifndef MPXCOLLECTIONVIEWHGTNLOADER_H_
+#define MPXCOLLECTIONVIEWHGTNLOADER_H_
+
+#include <e32base.h>
+#include <thumbnailmanager.h> // needs to be included here because of a bug in thumbnailmanagerobserver.h
+#include <thumbnailmanagerobserver.h>
+
+class CThumbnailManager;
+class CFbsBitmap;
+class CAsyncCallBack;
+
+/**
+ * Observer iface
+ */
+class MMpxTNLoaderObserver
+    {
+public:
+    virtual void TNReadyL(TInt aError, CFbsBitmap* aBitmap, CFbsBitmap* aMask, TInt aIndex) = 0;
+    };
+
+/**
+ * TN Loader
+ */
+NONSHARABLE_CLASS( CMpxTNLoader ) : public CBase, public MThumbnailManagerObserver
+    {
+public: // CONSTRUCTORS & DESCTRUCTOR
+
+    static CMpxTNLoader* NewL(MMpxTNLoaderObserver& aObserver, TThumbnailSize aSize );
+    virtual ~CMpxTNLoader();
+
+public: // NEW FUNCTIONS
+
+    void LoadThumbL(TInt aIndex, const TDesC& aFileName );
+    void CancelThumb( TInt aIndex );
+    void CancelAll();
+    void SetSizeL( TThumbnailSize aSize );
+
+private: // From MThumbnailManagerObserver
+
+    void ThumbnailPreviewReady( MThumbnailData& aThumbnail,
+        TThumbnailRequestId aId );
+    void ThumbnailReady( TInt aError, MThumbnailData& aThumbnail,
+        TThumbnailRequestId aId );
+
+private: // CONSTRUCTORS
+
+    CMpxTNLoader(MMpxTNLoaderObserver& aObserver,
+            TThumbnailSize aSize );
+    void ConstructL();
+
+private: // NEW FUNCTIONS
+
+    TInt FindLoadingById(TThumbnailRequestId aId, TBool aRemove = EFalse);
+    TInt FindLoadingByIndex(TInt aIndex, TBool aRemove = EFalse);
+    static TInt LoadThumbnail( TAny* aSelf );
+    void LoadNextTN();
+
+private: // DATA
+
+    MMpxTNLoaderObserver& iObserver;
+    CThumbnailManager* iTnEngine; // Own
+
+    // Loading information
+    class TLoadingTN
+        {
+    public:
+        TLoadingTN(TThumbnailRequestId aId, TInt aIndex, const TDesC& aFileName )
+        : iId(aId), iIndex(aIndex), iFileName( aFileName )
+            {
+            }
+
+        TThumbnailRequestId iId;
+        TInt iIndex;
+        TFileName iFileName;
+        };
+
+    RPointerArray<TLoadingTN> iLoading; // Loading Thubmbs
+    CAsyncCallBack* iAsyncCallBack;
+    TThumbnailSize iSize;
+    };
+
+#endif // MPXCOLLECTIONVIEWHGTNLOADER_H_