/*

 * ===========================================================================

 *  Name        : hgfswobservers.h

 *  Part of     : Huriganes / Fast Swap Server

 *  Description : Observer interfaces to get notifications from appui and from engine

 *  Version     : %version: sa1spcx1#4 %

 *

 *  Copyright © 2008 Nokia Corporation.

 *  This material, including documentation and any related 

 *  computer programs, is protected by copyright controlled by 

 *  Nokia Corporation. All rights are reserved. Copying, 

 *  including reproducing, storing, adapting or translating, any 

 *  or all of this material requires the prior written consent of 

 *  Nokia Corporation. This material also contains confidential 

 *  information which may not be disclosed to others without the 

 *  prior written consent of Nokia Corporation.

 * ===========================================================================

 */

#ifndef __HGFSWOBSERVERS_H

#define __HGFSWOBSERVERS_H

/**

 * Interface to get notifications from appui when window groups

 * have changed.

 */

class MHgFswTaskListObserver

    {

public:

    /**

     * Function called by AppUi to notify about possible

     * changes in task list

     */

    virtual void UpdateTaskList() = 0;

    };

/**

 * Interface to get notifications from appui's HandleResourceChangeL.

 */

class MHgFswResourceObserver

    {

public:

    /**

     * Function called by AppUi to notify about resource changes.

     */

    virtual void HandleResourceChange( TInt aType ) = 0;

    };

/**

 * Observer interface to get notifications from engine

 * when fsw content has changed.

 */

class MHgFswEngineObserver

    {

public:

    /**

     * Called when there is a change in the task list.

     */

    virtual void FswDataChanged() = 0;

    /**

     * Called to find out how many clients are subscribed

     * for fsw content change notifications.

     */

    virtual TInt FswDataListenerCount() = 0;

    };

/**

 * This class is interface for CHgFsHiddenAppList

 * to notify about list change

 */

class MHgFsHiddenAppListObserver

    {

public:

    /**

     * This function is called by CHgFsHiddenAppList when list is changed.

     */

    virtual void HiddenAppListUpdated() = 0;

    };

#endif