--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/collectionframework/thumbnailcreator/inc/mglxtnstorage.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,133 @@
+/*
+* 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:    Thumbnail storage interface
+*
+*/
+
+
+
+
+/**
+ * @internal reviewed 30/07/2007 by Simon Brooks
+ */
+
+#ifndef M_GLXTNSTORAGE_H
+#define M_GLXTNSTORAGE_H
+
+// INCLUDES
+
+#include <e32std.h>
+#include <glxmediaid.h>
+#include "glxtnstd.h"
+
+class CGlxtnFileInfo;
+
+// CLASS DECLARATION
+
+/**
+*  Interface for thumbnail persistent storage.
+*
+* @ingroup glx_thumbnail_creator
+*/
+class MGlxtnThumbnailStorage
+    {
+public:
+    /**
+    * Start asynchronous loading of thumbnail data.
+    * @param aData Buffer pointer for the loaded data. Memory is allocated
+                internally and ownership passed to the caller.
+    * @param aFormat Format of the thumbnail in aData.
+    * @param aId Media item ID.
+    * @param aFileInfo File info for media item.
+    * @param aSize Requested thumbnail size.
+    * @param aStatus Request status for the asynchronous operation.
+    */
+    virtual void LoadThumbnailDataL(HBufC8*& aData,
+                        TGlxImageDataFormat& aFormat, const TGlxMediaId& aId,
+                        const CGlxtnFileInfo& aFileInfo, const TSize& aSize,
+                        TRequestStatus* aStatus) = 0;
+    /**
+    * Start asynchronous saving of thumbnail data.
+    * @param aData Buffer containing the data to be saved.
+    * @param aFormat Format of the thumbnail in aData.
+    * @param aId Media item ID.
+    * @param aFileInfo File info for media item.
+    * @param aSize Requested thumbnail size.
+    * @param aStatus Request status for the asynchronous operation.
+    */
+    virtual void SaveThumbnailDataL(const TDesC8& aData,
+                        TGlxImageDataFormat aFormat, const TGlxMediaId& aId,
+                        const CGlxtnFileInfo& aFileInfo, const TSize& aSize,
+                        TRequestStatus* aStatus) = 0;
+    /**
+    * Start asynchronous deletion of all saved thumbnails for an item.
+    * @param aId Media item ID.
+    * @param aFileInfo File info for media item.
+    * @param aStatus Request status for the asynchronous operation.
+    */
+    virtual void DeleteThumbnailsL(const TGlxMediaId& aId,
+                const CGlxtnFileInfo& aFileInfo, TRequestStatus* aStatus) = 0;
+    /**
+    * Start asynchronous deletion of all saved thumbnails for items which no
+    * longer exist.
+    * @param aStatus Request status for the asynchronous operation.
+    */
+    virtual void CleanupThumbnailsL(TRequestStatus* aStatus) = 0;
+    /**
+    * Test whether a given thumbnail is available in storage.
+    * @param aId Media item ID.
+    * @param aFileInfo File info for media item.
+    * @param aSize Requested thumbnail size.
+    * @param aStatus Request status for the asynchronous operation.
+    */
+    virtual void IsThumbnailAvailableL(const TGlxMediaId& aId,
+                        const CGlxtnFileInfo& aFileInfo,
+                        const TSize& aSize, TRequestStatus* aStatus) = 0;
+    /**
+    * Cancel an ongoing asynchronous operation.
+    */
+    virtual void StorageCancel() = 0;
+    /**
+    * Notify that an error occurred in background generation.
+    * @param aId Media item ID.
+    * @param aError Error code.
+    */
+    virtual void NotifyBackgroundError(const TGlxMediaId& aId, TInt aError) = 0;
+    };
+
+/**
+*  Interface for notification of thumbnails becoming available in storage.
+*
+* @ingroup glx_thumbnail_creator
+*/
+class MGlxtnThumbnailStorageObserver
+    {
+public:
+    /**
+    * Notify that a given thumbnail is available in storage.
+    * @param aId Media item ID.
+    * @param aSize Requested thumbnail size.
+    */
+    virtual void ThumbnailAvailable(const TGlxMediaId& aId, const TSize& aSize) = 0;
+    /**
+    * Notify that an error occurred in background generation.
+    * @param aId Media item ID.
+    * @param aError Error code.
+    */
+    virtual void BackgroundThumbnailError(const TGlxMediaId& aId, TInt aError) = 0;
+    };
+
+#endif  // M_GLXTNSTORAGE_H
+
+// End of File