/*

* Copyright (c) 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:  flow layout policy implementation.

*

*/

#ifndef ALFFLOWLAYOUTPOLICYIMPL_H

#define ALFFLOWLAYOUTPOLICYIMPL_H

#include <osn/osndefines.h>

#include <alf/ialfflowlayoutpolicy.h>

using std::auto_ptr;

class CAlfFlowLayout;

using namespace Alf;

namespace Alf

    {

class AlfFlowLayoutManager;

/**

 * flow layout policy implementation

 *

 * @lib alfwidgetmodel.lib

 * @since S60 ?S60_version

 */

class AlfFlowLayoutPolicyImpl : public IAlfFlowLayoutPolicy

    {

public:

    /**

     * layout policy constructor

     *

     * @param aFlowLayoutManager flow layout manager instance

     */

    AlfFlowLayoutPolicyImpl(AlfFlowLayoutManager& aFlowLayoutManager);

    /**

     * destructor

     */

    ~AlfFlowLayoutPolicyImpl();

public:

//from IAlfFlowLayoutPolicy

    /**

     * Sets the direction of the flow.

     *

     * @param aDirection  Flow direction.

     */

    virtual void setFlowDirection(enum flowDirection aDirection);

    /**

     * returns the flow direction

     *

     * @param aDirection  Flow direction.

     */    

    virtual enum flowDirection flowDirection() const;

    /**

     * Sets the mode of the flow. The mode flags determine how the flow layout

     * behaves.

     *

     * @param aMode  Mode flags (OR'd together).

     *

     * @see IAlfFlowLayoutPolicy::flowModeFlags

     */

    virtual void setMode(int aMode);

    /**

     * Returns the mode flags of the flow.

     *

     * @see IAlfFlowLayoutPolicy::flowModeFlags

     *

     * @return  Returns the current mode flags.

     */

    virtual int mode() const;

public:

// from base class IAlfInterfaceBase

    /**

     * Interface getter. 

     * @see IAlfInterfaceBase::MakeInterface

     *

     * @since S60 ?S60_version

     * @param aType The type id of the queried interface.

     * @return The queried interface, or NULL if the interface is not

     *         supported or available.

     */    

    virtual IAlfInterfaceBase* makeInterface( const IfId& aType );	

private:

    /**

     * returns the native flowlayout used by the implementation.

     */    

    CAlfFlowLayout& layout() const;

private:

    AlfFlowLayoutManager &mFlowLayoutManager;

    enum IAlfFlowLayoutPolicy::flowDirection mDirection;

    };

    } // namespace Alf

#endif // ALFFLOWLAYOUTPOLICYIMPL_H