/*

* 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:  observer if any install/unistall happens at help app

*                 runtime

*

*/

#ifndef CSXHRUNTIMEAPPWATCHER_H

#define CSXHRUNTIMEAPPWATCHER_H

#include <e32base.h>

#include <f32file.h>

/*

 * Base class of Installation/Uninstallation

 * 

 */

class MInstallationObserver

    {

public:

    /*

     * call back function, to handle update index

     */

    virtual void RuntimeUpdateIndex() = 0;

    };

/*

 * Runtime indexing wather

 * keep watching if user install/uninstall/modify any helps

 * 

 */

class CCSXHRuntimeAppWatcher : public CActive

    {

public:

    /*

     * default constructor

     */

    CCSXHRuntimeAppWatcher();

    /*

     * destructor

     */

    ~CCSXHRuntimeAppWatcher();

    /*

     * two-phase constructor

     */

    static CCSXHRuntimeAppWatcher* NewL();

    /*

     * from base class CActive

     * Handles an active object's request completion event

     */

    void RunL();

    /*

     * from base class CActive

     * Implements cancellation of an outstanding request

     */

    void DoCancel();

    /*

     * start this active object

     */

    void Start();

    /*

     * Set observer

     * @param aObserver: App UI, notify user helps modified

     * 

     */

    void SetObserver( MInstallationObserver* aObserver );

private:

    /*

     * two-phase constructor

     */

    void ConstructL();

private:

    /*

     * file session

     */

    RFs iFileSession;

    /*

     * observer

     * not owned

     */

    MInstallationObserver* iObserver;

    };

#endif // CSXHRUNTIMEAPPWATCHER_H