/*

* Copyright (c) 2009 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 __CBACKSTEPPING_H

#define __CBACKSTEPPING_H

#include <w32std.h>

#include <tswindowgroupsobserver.h>

class CTsBacksteppingFilter;

NONSHARABLE_CLASS(CTsBackstepping) : public CTsWindowGroupsObserver

{

public:

    static CTsBackstepping* NewL( MTsWindowGroupsMonitor& );

    static CTsBackstepping* NewLC( MTsWindowGroupsMonitor& );

    virtual ~CTsBackstepping();

private:

    CTsBackstepping( MTsWindowGroupsMonitor& );

    void ConstructL();

    void HandleWindowGroupChanged( 

                            MTsResourceManager&, 

                            const TArray<RWsSession::TWindowGroupChainInfo>& );

    void HandleWindowGroupChangedL( 

                        MTsResourceManager&, 

                        const TArray<RWsSession::TWindowGroupChainInfo>& );

    TInt HomescreenOffsetL( 

                        MTsResourceManager&, 

                        const TArray<RWsSession::TWindowGroupChainInfo>& )const;

    TInt ParentOffsetL( TInt, 

                        const TArray<RWsSession::TWindowGroupChainInfo>& )const;

    inline TBool IsEmbededApp( const RWsSession::TWindowGroupChainInfo& ) const;

    TUid GetUidFromWindowGroupL(MTsResourceManager &aResources, TInt aWindowGroupId) const;

private:

    CTsBacksteppingFilter *iFilter;

};

#endif // __CBACKSTEPPING_H