/*

* 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 __CFILTERSTACK_H__

#define __CFILTERSTACK_H__

#include <e32base.h>

#include "MImageFilter.h"

class TFilter

	{

	public:

		inline ~TFilter()

			{

			delete iFilter;

			iLibrary.Close();

			}

		MImageFilter* iFilter;

		RLibrary iLibrary;

	};

class CFilterStack

	: public CBase

	{

	public:

		static CFilterStack* NewL();

		~CFilterStack();

	private:

		CFilterStack();

		void ConstructL();

	public:

		MImageFilter* Filter( TInt aPosition );

		void AddFilterL( const TDesC& aName );

		void AddFilterL( const TDesC& aName, TInt aPosition );

		void AddFilterL( const TFilter * aFilter );

		void AddFilterL( const TFilter * aFilter, const TInt aPosition );

		void RemoveFilter( TInt aPosition );

		void RemoveFilter ( TInt aPosition, TFilter *& aFilter );

		TInt FunctionL( TInt aPosition, const TDesC& aCmd );

		TInt NumFilters();

	private:

		void InitStack();

	private:

		RPointerArray< TFilter >iStack;

	};	

#endif