/*
* 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