--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/photosgallery/collectionframework/thumbnailcreator/inc/glxtnloadthumbnailtask.h	Thu Dec 17 08:45:44 2009 +0200
@@ -0,0 +1,116 @@
+/*
+* 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:    Base class for tasks which load thumbnails
+*
+*/
+
+
+
+
+#ifndef C_GLXTNLOADTHUMBNAILTASK_H
+#define C_GLXTNLOADTHUMBNAILTASK_H
+
+#include "glxtntask.h"
+#include "glxtnstd.h"
+
+// Forward declarations
+class CGlxtnFileInfo;
+class CGlxtnFileUtility;
+class CFbsBitmap;
+class CImageDecoder;
+class TGlxThumbnailRequest;
+
+/**
+ * Base class for tasks which load thumbnails.
+ *
+ * @author Dan Rhodes
+ * @ingroup glx_thumbnail_creator
+ */
+NONSHARABLE_CLASS( CGlxtnLoadThumbnailTask ) : public CGlxtnClientTask
+    {
+public:
+    /**
+    * Destructor.
+    */
+    ~CGlxtnLoadThumbnailTask();
+
+protected:  // From CGlxtnTask
+	void DoCancel();
+
+protected:
+    /**
+    * C++ default constructor.
+    * @param aId Task type ID.
+    * @param aRequestInfo Parameters for the thumbnail request.
+    * @param aFileUtility File utility for use by the task.
+    * @param aClient Client initiating the request.
+    */
+    CGlxtnLoadThumbnailTask( const TGlxtnTaskId& aId,
+                            const TGlxThumbnailRequest& aRequestInfo,
+                            CGlxtnFileUtility& aFileUtility,
+                            MGlxtnThumbnailCreatorClient& aClient );
+    /**
+    * Symbian 2nd phase constructor.
+    * @param aBitmapHandle Handle to bitmap in which to store the thumbnail.
+    */
+    void ConstructL( TInt aBitmapHandle );
+
+    /**
+    * Start asynchronous loading.
+    * @param aStatus Request status for the asynchronous operation.
+    * @return ETrue if an asynchronous operation has been started.
+    */
+    TBool LoadThumbnailL( TRequestStatus& aStatus );
+    /**
+    * Create bitmap from loaded thumbnail data.
+    * @param aStatus Request status for the asynchronous operation.
+    * @return ETrue if an asynchronous operation has been started.
+    */
+    TBool HandleLoadedThumbnailL( TRequestStatus& aStatus );
+    /**
+    * Start asynchronous decoding.  iDecoder should point to a valid decoder.
+    * @param aStatus Request status for the asynchronous operation.
+    * @param aScaleBitmap If true, scale the loaded bitmap close to
+    *       requested size.
+    */
+    void DecodeThumbnailL( TRequestStatus& aStatus, TBool aScaleBitmap );
+
+protected:
+    enum TGeneratorState
+        {
+        EStateFetchingUri, EStateLoading, EStateDecodingThumbnail,
+        EStateDecodingImage, EStateScaling, EStateFiltering
+        };
+
+    /** File utility */
+    CGlxtnFileUtility& iFileUtility;
+	/** Current state for task state machine */
+    TGeneratorState iState;
+    /** File information for item to thumbnail (owned) */
+    CGlxtnFileInfo* iInfo;
+    /** Requested thumbnail size */
+    TSize iRequestedSize;
+    /** Thumbnail image data (owned) */
+    HBufC8* iThumbData;
+    /** Thumbnail data format */
+    TGlxImageDataFormat iFormat;
+    /** Decoder to decode the thumbnail data (owned) */
+    CImageDecoder* iDecoder;
+    /** Bitmap to decode image into (owned) */
+    CFbsBitmap* iThumbnail;
+    /** DRM allowed flag passed from thumbnail request */
+    TBool iDrmAllowed;
+    };
+
+#endif // C_GLXTNLOADTHUMBNAILTASK_H