--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imagehandling_plat/thumbnailmanager_api/inc/thumbnailmanagerobserver.h	Tue Jan 26 15:18:05 2010 +0200
@@ -0,0 +1,104 @@
+/*
+* Copyright (c) 2006-2007 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:  Thumbnail Manager observer.
+ *
+*/
+
+
+#ifndef THUMBNAILMANAGEROBSERVER_H
+#define THUMBNAILMANAGEROBSERVER_H
+
+#include "thumbnailobjectsource.h"
+
+class MThumbnailData;
+
+/**
+ *  Thumbnail observer.
+ *
+ *  Callback interface for getting information about completed thumbnail
+ *  operations. This should be implemented by the client using the API.
+ *
+ *  Example of how the client may implement the ThumbnailReady()
+ *  method:
+ *  @code
+ *  void CMyThumbnailControl::ThumbnailReady(
+ *      TInt aError,
+ *      MThumbnailData& aThumbnail,
+ *      TThumbnailRequestId aId )
+ *      {
+ *      // This function must not leave.
+ *      delete iBitmap;
+ *      iBitmap = NULL;
+ *
+ *      if ( !aError )
+ *          {
+ *          // Claim ownership of the bitmap instance for later use
+ *          iBitmap = aThumbnail.DetachBitmap();
+ *          // We can now use iBitmap in our Draw() method
+ *          DrawDeferred();
+ *          }
+ *      else
+ *          {
+ *          // An error occurred while getting the thumbnail.
+ *          // Perhaps we should show a broken image icon to the user.
+ *          }
+ *      }
+ *  @endcode
+ *  @since S60 v5.0
+ */
+class MThumbnailManagerObserver
+    {
+public:
+
+    /**
+     * Preview thumbnail generation or loading is complete.
+     *
+     * This callback is not called unless EOptimizeForQualityWithPreview flag
+     * was specified.
+     *
+     * This callback is not called if any of the following is true:
+     * - an error occurred while processing the preview thumbnail
+     * - a suitable existing thumbnail was not found
+     * - a high quality thumbnail is already available
+     *
+     * The MThumbnailData instance is only valid for the duration of
+     * this call. It may not be stored for later use. If the client should
+     * want to use the bitmap data later, it can claim ownership of the
+     * CFbsBitmap object by calling DetachBitmap().
+     *
+     * @since S60 v5.0
+     * @param aThumbnail     An object representing the resulting thumbnail.
+     * @param aId            Request ID for the operation
+     */
+    virtual void ThumbnailPreviewReady( MThumbnailData& aThumbnail,
+        TThumbnailRequestId aId ) = 0;
+
+    /**
+     * Final thumbnail bitmap generation or loading is complete.
+     *
+     * The MThumbnailData instance is only valid for the duration of
+     * this call. It may not be stored for later use. If the client should
+     * want to use the bitmap data later, it can claim ownership of the
+     * CFbsBitmap object by calling DetachBitmap().
+     *
+     * @since S60 v5.0
+     * @param aError         Error code.
+     * @param aThumbnail     An object representing the resulting thumbnail.
+     * @param aId            Request ID for the operation.
+     */
+    virtual void ThumbnailReady( TInt aError, MThumbnailData& aThumbnail,
+        TThumbnailRequestId aId ) = 0;
+};
+
+#endif // THUMBNAILMANAGEROBSERVER_H