/*

* Copyright (c) 2005 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:  

*     TMsgEditorSettingCacheUpdatePlugin declaration file

*

*/

#ifndef __MSGEDITORSETTINGCACHEUPDATEPLUGIN_H

#define __MSGEDITORSETTINGCACHEUPDATEPLUGIN_H

//  INCLUDES

#include <bldvariant.hrh>

#include <AknSettingCache.h>

#include <MsgEditorAppUi.h>

// FORWARD DECLARATIONS

// CLASS DECLARATION

// ========== CLASS DECLARATION ============================

/**

* Implementation of setting cache plugin. 

* @internal

* @since 3.1

*/

NONSHARABLE_CLASS(TMsgEditorSettingCacheUpdatePlugin) : public MAknSettingCacheUpdatePlugin

    {

    public: // from MAknSettingCacheUpdatePlugin

        /**

        * handles local zoom layout switch event

        * @param aEventId event id to be queried

        * @return ETrue if the event id is handled

        */

        virtual TBool HandlesEvent(TInt aEventId) const;

        /**

        * Update the cached values of local zoom.

        * @param aEventId event id to be processed

        * @return ETrue if the event has caused an update, EFalse otherwise

        */

        virtual TBool Update(TInt aEventId);

        /**

        * Return the local zoom value

        * @param aEventId the event id

        * @param aValue output the value

        * @return KErrNone if there was no error.

        */

        virtual TInt GetValue(TInt aEventId, TInt& aValue) const;

    public: // constructors etc

        IMPORT_C TMsgEditorSettingCacheUpdatePlugin( CAknAppUi* aAppUi);

        IMPORT_C virtual ~TMsgEditorSettingCacheUpdatePlugin();

    private:

        TAknUiZoom iLocalZoomCache;

        CAknAppUi* iAppUi;// not owned

    };

#endif      // __MSGEDITORSETTINGCACHEUPDATEPLUGIN_H

// End of File