--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/collectionframework/thumbnailcreator/inc/glxtnthumbnailcreator.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,129 @@
+/*
+* 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 creator: provides thumbnails and generates on background
+*
+*/
+
+
+
+
+/**
+ * @internal reviewed 30/07/2007 by Simon Brooks
+ */
+
+#ifndef C_GLXTNTHUMBNAILCREATOR_H
+#define C_GLXTNTHUMBNAILCREATOR_H
+
+#include "glxtnstd.h"
+#include "glxtntask.h"
+#include <glxmediaid.h>
+#include <glxpanic.h>
+#include <glxthumbnailinfo.h>
+
+class CGlxtnFileUtility;
+class CGlxSettingsModel;
+class MGlxtnThumbnailCreatorClient;
+class MGlxtnThumbnailStorage;
+class TGlxThumbnailRequest;
+
+/**
+ *  CGlxtnThumbnailCreator
+ *
+ *  Thumbnail creator is the thumbnail engine, and it loads and generates 
+ *  thumbnails on the foreground and generates non-created thumbnails on
+ *  the background
+ *
+ * @ingroup glx_thumbnail_creator
+ */
+class CGlxtnThumbnailCreator : public CBase
+    {
+public:
+    /**
+    * Starts the provisioning of a thumbnail.  This will result in a callback
+    * to MGlxtnThumbnailCreatorClient::ThumbnailFetchComplete().
+    */
+    IMPORT_C static CGlxtnThumbnailCreator* InstanceL();
+    /**
+    * Decrement the reference count, and delete the instance if the count
+    * becomes zero.  Ensures any tasks using the given storage are cancelled.
+    * @param aStorage Pointer to storage used by client, or NULL.
+    */
+    IMPORT_C void Close(MGlxtnThumbnailStorage* aStorage);
+
+    /**
+    * Destructor.
+    */
+	~CGlxtnThumbnailCreator();
+
+    /**
+    * Starts the provisioning of a thumbnail.  This will result in a callback
+    * to MGlxtnThumbnailCreatorClient::ThumbnailFetchComplete().
+    * @param aRequestInfo Parameters for required thumbnail.
+    * @param aClient Client initiating the request.
+    */
+    IMPORT_C void FetchThumbnailL(const TGlxThumbnailRequest& aRequestInfo,
+                                    MGlxtnThumbnailCreatorClient& aClient);
+
+    /**
+    * Starts deleting all stored thumbnails for a given item.  This will result
+    * in a callback to MGlxtnThumbnailCreatorClient::ThumbnailDeletionComplete().
+    * @param aItemId ID of the media item.
+    * @param aClient Client initiating the request.
+    */
+    IMPORT_C void DeleteThumbnailsL(const TGlxMediaId& aItemId,
+                                    MGlxtnThumbnailCreatorClient& aClient);
+
+    /**
+    * Starts the filtering of items for which a thumbnail is available from a
+    * list of item IDs.  This will result in a callback to
+    * MGlxtnThumbnailCreatorClient::FilterAvailableComplete().
+    * @param aItemArray Array of item IDs, from which those with thumbnails
+    *                   should be removed.
+    * @param aSize Size of thumbnail required.
+    * @param aClient Client initiating the request.
+    */
+    IMPORT_C void FilterAvailableThumbnailsL(
+                    const TArray<TGlxMediaId>& aItemArray, const TSize& aSize,
+                    MGlxtnThumbnailCreatorClient& aClient);
+
+    /**
+    * Starts the cleanup of obsolete thumbnails from storage.  There is no
+    * callback indicating completion of the request.
+    * @param aStorage Pointer to storage used by client.
+    */
+    IMPORT_C void CleanupThumbnailsL(MGlxtnThumbnailStorage* aStorage);
+
+    /** 
+    * Cancel any ongoing tasks for a given item.  This ensures the TNC is not
+    * locking the media file.
+    * @param aItemId ID of the media item.
+    */
+    IMPORT_C void CancelRequest(const TGlxMediaId& aItemId);
+
+private:
+	CGlxtnThumbnailCreator();
+	void ConstructL();
+
+private:
+    /** Task manager */
+    CGlxtnTaskManager* iTaskManager;
+    /** File utility used by the tasks */
+    CGlxtnFileUtility* iFileUtility;
+    /** Reference count of the single instance */
+    TInt iReferenceCount;
+    /** Settings Model used by the background tasks */
+    CGlxSettingsModel* iSettingsModel;
+    };
+
+#endif // C_GLXTNTHUMBNAILCREATOR_H