/*

* 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:  layoutmanager implementation class with focus handling in 1D (next/previous)

*

*/

#include <alf/ialfwidgetcontrol.h>

#include <alf/alfvisual.h>

#include <alf/alfanchorlayout.h>

#include "alf/alfwidget.h"

#include <alf/alfvisualfactory.h>

#include <alf/alfexceptions.h>

#include <alf/ialflayoutpreferences.h>

#include <osn/osnnew.h>

//stl

#include <algorithm> //for min & max

#include "alfanchorlayoutmanagerimpl.h"

using namespace Alf;

namespace Alf

    {

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// layoutmanagerimpl constructor

// ---------------------------------------------------------------------------

//    

AlfAnchorLayoutManagerImpl::AlfAnchorLayoutManagerImpl(

    AlfAnchorLayoutManager& aAnchorLayoutManager) : 

    mAnchorLayoutManager(aAnchorLayoutManager)

    {

    }

// ---------------------------------------------------------------------------

// creates the layout used by the layoutmanager.

// ---------------------------------------------------------------------------

//    

AlfAnchorLayoutManagerImpl::~AlfAnchorLayoutManagerImpl()

    {

    }

// ---------------------------------------------------------------------------

// from IAlfLayoutPreferences

// Returns the minimum area that this layout manager can occupy by observing

// the minimum sizes of the child UI elements in the layout

// ---------------------------------------------------------------------------

//

bool AlfAnchorLayoutManagerImpl::getMinimumSize( TAlfXYMetric& /*aMinSize*/ ) const

	{

	return false;

	}

// ---------------------------------------------------------------------------

// from IAlfLayoutPreferences

// Returns the maximum area that this layout manager can occupy by observing

// the maximum sizes of the child UI elements in the layout

// ---------------------------------------------------------------------------

//

bool AlfAnchorLayoutManagerImpl::getMaximumSize( TAlfXYMetric& /*aMaxSize*/ ) const

	{

	return false;

	}

// ---------------------------------------------------------------------------

// Combines and returns the preferred sizes of all child UI elements according

// to the layouting rules.

// ---------------------------------------------------------------------------

//

bool AlfAnchorLayoutManagerImpl::getPreferredSize(TAlfXYMetric& /*aPreferredSize*/) const

	{

	return false;

	}

// ---------------------------------------------------------------------------

// from IAlfLayoutPreferences

// At the moment doesn't do anything since preferred size is being queried

// from the child UI elements added to this layout manager.

// ---------------------------------------------------------------------------

//

void AlfAnchorLayoutManagerImpl::setPreferredSize( const TAlfXYMetric& aPreferredSize)

	{

	TAlfTimedPoint size((float)aPreferredSize.iX.iMagnitude,(float)aPreferredSize.iY.iMagnitude);

	layout().SetSize(size);

	mAnchorLayoutManager.owner().updateParentLayout();

	}

// ---------------------------------------------------------------------------

// From class IAlfInterfaceBase.

// Getter for interfaces provided by the element.

// ---------------------------------------------------------------------------

//

IAlfInterfaceBase* AlfAnchorLayoutManagerImpl::makeInterface(const IfId& aType)

    {

    UString param(aType.mImplementationId);

    if (param == IAlfLayoutPreferences::type().mImplementationId)

        {

        return this;

        }      

    return NULL;

    }

// ---------------------------------------------------------------------------

// returns the anchorlayout used by the layoutmanager

// ---------------------------------------------------------------------------

//

CAlfAnchorLayout& AlfAnchorLayoutManagerImpl::layout() const

    {

    return dynamic_cast<CAlfAnchorLayout&>(mAnchorLayoutManager.getLayout());

    }

 } // Alf