/*

* Copyright (c) 2009 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: 

*

*/

/*

 * huilowmemoryobserver.h

 *

 *  Created on: Jun 9, 2009

 *      Author: ranshett

 */

#ifndef HUILOWMEMORYOBSERVER_H_

#define HUILOWMEMORYOBSERVER_H_

enum THuiMemoryLevel

    {

    /** 

     * No memory available at all. Even all rendering 

     * surfaces and buffers should be released.

     *  

     **/

    EHuiMemoryLevelNone = -50,

    /** 

     * Lowest memory level. Use SW rendering if possible, 

     * only rendering surfaces etc. absolutely mandatory 

     * objects are allowed to consume memory.

     * 

     **/

    EHuiMemoryLevelLowest = -40,

    /** 

     * To be defined.

     *  

     **/

    EHuiMemoryLevelLower = -30,    

    /** 

     * Low memory level, same as EnableLowMemoryState(ETrue). Normal

     * functionality and user experience is not provided. Memory usage

     * is minimized, but HW rendering is to be used. Caches, buffers,

     * effects, etc. are to be disabled.

     *  

     **/

    EHuiMemoryLevelLow = -20, 

    /** 

     *  Reduced memory level. Normal functionality and user experience

     *  should be provided, but all non-mandatory memory usage should

     *  be avoided. 

     *  

     **/

    EHuiMemoryLevelReduced = -10,    

    /** 

     * Normal memory level, same as EnableLowMemoryState(EFalse) 

     **/

    EHuiMemoryLevelNormal = 0    

    };

/** 

 * Memory level observer interface is same as MHuiLowMemoryObserver

 * but gives more detailed information about memory levels. 

 **/

class MHuiMemoryLevelObserver

    {

public:

    IMPORT_C virtual void SetMemoryLevel(THuiMemoryLevel aLevel)=0;

    };

/** 

 * @deprecated use MHuiMemoryLevelObserver instead.

 **/

class MHuiLowMemoryObserver

    {

public:

    IMPORT_C virtual void EnableLowMemoryState(TBool aEnable)=0;

    };

#endif /* HUILOWMEMORYOBSERVER_H_ */