--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imagehandling_plat/image_handling_library_api/inc/MIHLViewerObserver.h	Tue Jan 26 15:18:05 2010 +0200
@@ -0,0 +1,68 @@
+/*
+* Copyright (c) 2004 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:  Pure virtual base class for viewer observer.
+*
+*/
+
+
+#ifndef IHLVIEWEROBSERVER_H
+#define IHLVIEWEROBSERVER_H
+
+// INCLUDES
+#include <e32std.h>
+
+// CLASS DECLARATION
+/**
+*  MIHLViewerObserver
+*
+*  Pure virtual base class for viewer observer.
+*  @lib IHL.lib
+*  @since 3.0
+*/
+class MIHLViewerObserver
+	{
+	public:
+
+        /**
+        * This callback is currently not supported!
+        *
+        * Notifies client of viewer events.
+		* Event codes are defined in viewer header.
+		* Leave situation is handled in ViewerError() callback.
+        * @since 3.0
+        * @param aEvent Type of event.
+        * @param aEventCode1 Event specific code 1.
+        * @param aEventCode2 Event specific code 2.
+		*/
+		virtual void ViewerEventL( TInt /*aEvent*/, TInt /*aEventCode1*/, TInt /*aEventCode2*/ ) {}
+
+		/**
+        * Notifies client when viewer bitmap content is changed.
+		* Leave situation is handled in ViewerError() callback.
+        * @since 3.0
+		*/
+		virtual void ViewerBitmapChangedL() = 0;
+
+        /**
+        * Notifies client if error occurs in viewer.
+        * @since 3.0
+        * @param aError System wide error code.
+		*/
+		virtual void ViewerError( TInt aError ) = 0;
+
+	};
+
+#endif // IHLIMAGEVIEWEROBSERVER_H
+
+// End of File