/*

* Copyright (c) 2006 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:  MPX view activcation observer interface definition

*

*/

#ifndef MMPXVIEWACTIVATIONOBSERVER_H

#define MMPXVIEWACTIVATIONOBSERVER_H

// INCLUDES

#include <e32std.h>

// FORWARD DECLARATIONS

// CLASS DECLARATION

/**

 *  MPX view activation observer.

 *

 *  @lib mpxviewutility.lib

 */

NONSHARABLE_CLASS( MMPXViewActivationObserver )

    {

public:

    enum TViewUpdateEvent

        {

        EViewPluginAdd,

        EViewPluginUpdate,

        EViewPluginRemove

        };

public:

    /**

     * Handle view activation.

     *

     * @since S60 3.2.3

     * @param aCurrentViewType Current view type Uid.

     * @param aPreviousViewType Previous view type Uid.

     */

    virtual void HandleViewActivation(

        const TUid& aCurrentViewType,

        const TUid& aPreviousViewType ) = 0;

    /**

     * Called in case a view plugin is added/updated/removed through a SIS install.

     *

     * @since S60 3.2.3

     * @param aViewUid view UID

     * @param aUpdateEvent Defines the update type (addition/update/removal).

     * @param aLoaded ETrue if the view plugin is loaded, EFalse otherwise. It is recommended

     *          that client applications exit when loaded plugins are updated or removed.

     *          This would normally be handled in the AppUi.

     * @param aData Its meaning depends on the update event:

     *            EViewPluginAdd - new view plugin version

     *            EViewPluginUpdate - new view plugin version

     *            EViewPluginRemove - old view plugin version

     */

    virtual void HandleViewUpdate(

        TUid /* aViewUid */,

        TViewUpdateEvent /* aUpdateEvent */,

        TBool /* aLoaded */,

        TInt /* aData */) {};

    };

#endif  // MMPXVIEWACTIVATIONOBSERVER_H

// End of File