/*

* Copyright (c) 2004-2007 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 for installation changes.

*

*/

#ifndef C_AKNSSRVFILEOBSERVER_H

#define C_AKNSSRVFILEOBSERVER_H

//  INCLUDES

#include <e32base.h>

#include <f32file.h>

// CLASS DECLARATIONS

/**

*  And callback interface class for listening file server when new skin

*  packages are installed.

*  @since 2.6

*/

NONSHARABLE_CLASS(MAknsSrvFileObserver)

    {

    public:

        virtual void NewSkinPackagesInstalled() = 0;

        virtual void WallpaperLost() = 0;

        virtual void SlideSetModifiedL() = 0;

    };

// Defines type of observer.

enum TAknsSrvFileSrvObserverType

    {

    EAknsSrvNotDefined,

    EAknsSrvDirObserver, // not used

    EAknsSrvFileObsWallpaper, // not used

    // Observer for slide set wallpaper ini-file.

    EAknsSrvFileObsSlidesetWallpaper,

    };

/**

*  An active object notification class for listening file server events

*  when new skins are installed to the system.

*

*  @since 2.6

*/

NONSHARABLE_CLASS(CAknsSrvFileObserver) : public CActive

    {

    public:

        /**

        * Two-phased constructor.

        */

        static CAknsSrvFileObserver* NewL(MAknsSrvFileObserver* aObserver);

        static CAknsSrvFileObserver* NewL(MAknsSrvFileObserver* aObserver,

                                          const TDesC& aFilename);

        /**

        * Creates new instance of CAknsSrvFileObserver.

        * @param aObserver observer.

        * @param aFilename file to observer

        * @param aObserverType type of observer -

        *        see TAknsSrvFileSrvObserverType enum for types.

        * @param aFilename filename to be observed.

        */

        static CAknsSrvFileObserver* NewL( MAknsSrvFileObserver* aObserver,

                                           TAknsSrvFileSrvObserverType aObserverType,

                                           const TDesC& aFilename );

        /**

        * Destructor.

        */

        ~CAknsSrvFileObserver();

        void IssueRequest();

    public: // From CActive

        void RunL();

        void DoCancel();

    private: // Construction

        /**

        * C++ constructor.

        */

        CAknsSrvFileObserver(MAknsSrvFileObserver* aObserver);

        /**

        * By default Symbian 2nd phase constructor is private.

        */

        void ConstructL();

    private:

        RFs iFsSession;

        MAknsSrvFileObserver* iObserver;

        HBufC* iFilename;

        // Type of observer - see TAknsSrvFileSrvObserverType.

        TAknsSrvFileSrvObserverType iType;

    };

#endif    // C_AKNSSRVFILEOBSERVER_H

// End of File