--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/imageeditor/inc/SingleParamControlObserver.h	Fri Jan 29 13:53:17 2010 +0200
@@ -0,0 +1,104 @@
+/*
+* Copyright (c) 2010 Ixonos Plc.
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of the "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:
+* Ixonos Plc
+*
+* Description:  
+*
+*/
+
+
+
+#ifndef SINGLEPARAMCONTROLOBSERVER_H
+#define SINGLEPARAMCONTROLOBSERVER_H
+
+//  INCLUDES
+
+//  FORWARD DECLARATIONS
+
+
+/*	CLASS: MSingleParControlObserver
+*
+*   MSingleParControlObserver is a mixin class for updating the parameter
+*
+*/
+class MSingleParControlObserver
+{
+public:
+/** @name Methods:*/
+//@{
+    enum TParamOperation
+    {
+        //  Invalid
+        EParamOperationMin,
+        //  Set default parameter
+        EParamOperationDefault,
+        //  Add step to parameter
+        EParamOperationAdd,
+        //  Subtract step from parameter
+        EParamOperationSubtract,
+        //  Invalid
+        EParamOperationMax,
+    };
+//@}
+
+/** @name Methods:*/
+//@{
+	/** ParamOperation 
+    *
+    *   Performs an operation to the filter parameter.
+	*
+	*	@param aOperation - filter parameter operation
+	*	@return -
+	*/
+	virtual void ParamOperation (const TParamOperation aOperation) = 0;
+
+	/** GetParam
+    *
+    *   Gets filter parameter.
+	*
+	*	@param -
+	*	@return TReal - filter parameter value
+	*/
+	virtual TReal GetParam () const = 0;
+//@}
+
+protected:
+
+/** @name Methods:*/
+//@{
+
+//@}
+
+/** @name Members:*/
+//@{
+
+//@}
+
+private:
+
+/** @name Methods:*/
+//@{
+
+
+//@}
+
+/** @name Members:*/
+//@{
+
+//@}
+
+};
+
+#endif
+
+// End of File