/*

* 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:   Viewport visual.

*

*/

#include "uiacceltk/huiviewportlayout.h"  // Class definition

#include <uiacceltk/HuiControl.h>

#include <uiacceltk/HuiUtil.h>

EXPORT_C CHuiViewportLayout* CHuiViewportLayout::AddNewL(CHuiControl& aOwnerControl, CHuiLayout* aParentLayout)

    {

    CHuiViewportLayout* layout = new (ELeave) CHuiViewportLayout(aOwnerControl);

    CleanupStack::PushL(layout);

    layout->ConstructL();    

    aOwnerControl.AppendL(layout, aParentLayout);

    CleanupStack::Pop(layout);           

    return layout;    

    }

CHuiViewportLayout::CHuiViewportLayout(MHuiVisualOwner& aOwner)

        : CHuiLayout(aOwner)

    {

    iVirtualSize = THuiRealSize(1.0f, 1.0f);

    iViewportSize = THuiRealSize(1.0f, 1.0f);  

    iViewportPos = THuiRealPoint(0.0f, 0.0f);

    iWrappingFlags = 0;

    }

void CHuiViewportLayout::ConstructL()

    {    

    CHuiLayout::ConstructL();

    SetClipping(ETrue);    

    }

CHuiViewportLayout::~CHuiViewportLayout()

    {    

    }

EXPORT_C void CHuiViewportLayout::SetVirtualSize(const THuiRealSize& aSize, TInt aTransitionTime)

    {

    if ( !HuiUtil::RealCompare( iVirtualSize.iHeight, aSize.iHeight ) || 

         !HuiUtil::RealCompare( iVirtualSize.iWidth, aSize.iWidth ) )

        {   

        iVirtualSize = aSize;

        UpdateChildrenLayout(aTransitionTime);    

        SetChanged();

        }

    }

EXPORT_C void CHuiViewportLayout::SetViewportSize(const THuiRealSize& aSize, TInt aTransitionTime)

    {

    // Divide by zero will be caught later.

    if ( !HuiUtil::RealCompare( iViewportSize.iHeight, aSize.iHeight ) || 

         !HuiUtil::RealCompare( iViewportSize.iWidth, aSize.iWidth ) )

        { 

        iViewportSize = aSize;

        UpdateChildrenLayout(aTransitionTime);            

        SetChanged();   

        }

    }

EXPORT_C void CHuiViewportLayout::SetViewportPos(const THuiRealPoint& aPos, TInt aTransitionTime)

    {

     if ( !HuiUtil::RealCompare( iViewportPos.iY, aPos.iY ) || 

         !HuiUtil::RealCompare( iViewportPos.iX, aPos.iX ) )

        { 

        iViewportPos = aPos;

        UpdateChildrenLayout(aTransitionTime);        

        SetChanged();

        }

    }

void CHuiViewportLayout::SetSize(const THuiRealSize& aSize, TInt aTransitionTime)

    {

    CHuiLayout::SetSize(aSize, aTransitionTime);

    UpdateChildrenLayout(aTransitionTime);    

    }

TBool CHuiViewportLayout::ChildSize(TInt /*aOrdinal*/, TSize& aSize)

    {

    THuiRealSize mysize = Size().Target().AsSize();

    if ((iViewportSize.iWidth == 0.0) || (iViewportSize.iHeight == 0.0))

        {

        // Could not obtain new size because of divide by zero error.

        return EFalse;            

        }

    aSize.iWidth = HUI_ROUND_FLOAT_TO_INT((iVirtualSize.iWidth / iViewportSize.iWidth) * mysize.iWidth);

    aSize.iHeight = HUI_ROUND_FLOAT_TO_INT((iVirtualSize.iHeight / iViewportSize.iHeight) * mysize.iHeight);

    return ETrue;

    }

TBool CHuiViewportLayout::ChildPos(TInt /*aOrdinal*/, TPoint& aPos)

    {

    THuiRealSize mysize = Size().RealTarget().AsSize();

    if ((iViewportSize.iWidth == 0.0) || (iViewportSize.iHeight == 0.0))

        {

        // Could not obtain new size because of divide by zero error.

        return EFalse;            

        }

    aPos.iX = HUI_ROUND_FLOAT_TO_INT( -iViewportPos.iX * mysize.iWidth / iViewportSize.iWidth );

    aPos.iY = HUI_ROUND_FLOAT_TO_INT( -iViewportPos.iY * mysize.iHeight / iViewportSize.iHeight );

    return ETrue;

    }

EXPORT_C TInt CHuiViewportLayout::ChildRect(TInt /*aOrdinal*/, THuiRealRect& /*aPos*/)

    {

    return THuiLayoutChildRectNotImplemented;

    }