/*

* Copyright (c) 2008 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:   

*

*/

#ifndef HUIFXPARAMETERMANAGER_H_

#define HUIFXPARAMETERMANAGER_H_

#include "HuiFxParameter.h"

#include "HuiFxParameterCollection.h"

#include <e32std.h>

#include <e32hashtab.h>

class CHuiFxEngine;

class TRgb;

/**

 *  A hash map containing named layer and filter parameters

 */

typedef RPtrHashMap<TDesC, MHuiFxParameter> RHuiFxParameterMap;

class CHuiFxParameterManager: public CBase, public MHuiFxParameterCollection

    {

public:

    static CHuiFxParameterManager* NewL();

    ~CHuiFxParameterManager();

    MHuiFxParameter* Parameter(const TDesC& aName);

    // does not take ownership

    void RegisterParameterL(const TDesC& aName, TRgb* aColor);

    void RegisterParameterL(const TDesC& aName, TReal32* aScalar);

    TBool HasAnimatedParameters() const;

    void AdvanceTime(TReal32 aElapsedTime);

    TBool Update(CHuiFxEngine& aEngine, const TRect& aVisualRect);

public: // effect cache

    CHuiFxParameterManager* CloneL() const;

    void CopyParameterL(const TDesC &aName, TReal32 *aValue, const CHuiFxParameterManager *aOldValues);

    void CopyParameterL(const TDesC &aName, TRgb *aValue, const CHuiFxParameterManager *aOldValues);

private:

    CHuiFxParameterManager();

    void ConstructL();

    void ResolveReference( TReal32& aDefaultValue, THuiFxReferencePoint aRef, CHuiFxEngine& aEngine, const TRect& aVisualRec );

    RHuiFxParameterMap      iParameters;

    };

#endif /* HUIFXPARAMETERMANAGER_H_ */