/*

* 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 __MCSRUNNINGAPPSWGMONITOR_H__

#define __MCSRUNNINGAPPSWGMONITOR_H__

#include <w32std.h>

#include <WidgetRegistryConstants.h>

#include "menuengoperation.h"

//Forward declatations

class CMenuEng;

class MMcsRunningAppsHandler;

class CApaWindowGroupName;

/*

 * Windows Group change monitor. 

 * It cooperates with CMcsRunningAppsHandler. If any application was 

 * launched or closed it passes an array with currently running applications 

 * UIDs to CMcsRunningAppsHandler

 */

NONSHARABLE_CLASS( CMcsRunningAppsWgMonitor ): public CActive, MMenuEngOperation

    {

    public:

	/**

	*   Factory method.

	*/

    static CMcsRunningAppsWgMonitor* NewL( 

        CMenuEng& aEng, MMcsRunningAppsHandler* aRunningAppsHandler,

        TInt aPriority = EPriorityStandard );

    /**

    *   Destructor.

    */

    ~CMcsRunningAppsWgMonitor();

private:

	/**

	*   Constructor.

	*/

	CMcsRunningAppsWgMonitor( 

	    CMenuEng& aEng, MMcsRunningAppsHandler* aRunningAppsHandler,

	    TInt aPriority );

	/**

	 * 2nd phase constructor

	 */

	void ConstructL();

private:    // from MMenuEngOperation

    /**

    * Execute engine operation:

    * Do the application scan and update menu accordingly.

    */

    void RunMenuEngOperationL();

    /**

    * Error handling: ignore error.

    * @param aErr Error code.

    */

    void CompletedMenuEngOperation( TInt aErr );

private:    

    /**

    *   It is called if an event is received from the windowserver.

    */

    void RunL();

    /**

    * Error handling: ignore error.

    * @param aErr Error code.

    */

    TInt RunError( TInt aError );

    /**

     *   Provides Active object safe cancellation

    */

    void DoCancel();

    /**

    *   It activates the object, requests an event from the windowserver.

    */

    void Start();

    /*

     * Fills iRunningApps array with UIDs of currently running applications

     * and passes this array to CMcsRunningAppsHandler

    */

    void UpdateRunningApplicationsL();

    /**

     *   Updates the list of the running widgets.

     */

    void UpdateWidgetTaskListL( );

private://data

    /*

    * engine. not own

    */

    CMenuEng& iEng ; ///< Engine.

    /**

    *   The events can be received via this session.

    */

    RWsSession iWsSession;

    /**

    *   Seesion to widget registry. own

    */

    RWidgetRegistryClientSession iWidgetSession;

    /*

     * own 

     */

    RArray<TUid> iRunningApps;

    /*

     * not own

     */

    MMcsRunningAppsHandler* iRunningAppsHandler;

    /*

     * own 

     */

    RWindowGroup iWg;

    /*

     * own 

     */    

    CApaWindowGroupName* iWgName;

    /*

     * 

     */

    TBool iOperationInProgress;

    };

#endif // __MCSRUNNINGAPPSWGMONITOR_H__