/*

* Copyright (c) 2010 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: Reflection effect for Music Player Media Wall.

*

*/

#include <QPainter>

#include <QGraphicsItem>

#include <hbinstance.h>

#include "mpreflectioneffect.h"

/*!

    \class MpReflectionEffect

    \brief The MpReflectionEffect class provides a reflection effect.

    Renders the source with a reflection.

*/

/*!

    Constructs a new MpReflectionEffect instance.

    The \a parent parameter is passed to QGraphicsEffect's constructor.

*/

MpReflectionEffect::MpReflectionEffect(QObject *parent)

    : QGraphicsEffect( parent )

{

}

/*!

    Destroys the effect.

*/

MpReflectionEffect::~MpReflectionEffect()

{

}

/*!

    \reimp

*/

QRectF MpReflectionEffect::boundingRectFor(const QRectF &rect) const

{

    QRectF retRect = rect;

    //this bounding rect is in device cordinates, correcting based on current transform.

    if ( hbInstance->allMainWindows()[0]->orientation() == Qt::Horizontal ) {

#ifdef __WINS__        

        retRect.adjust(0,0,retRect.width(),0); //wincw with forced rotation is to the right.

#else

        retRect.adjust(-retRect.width(),0,0,0);//currently hardware rotations is to the left.

#endif

    } else {

        retRect.adjust(0,0,0,retRect.height());

    }

    return retRect;

}

/*!

    \reimp

*/

void MpReflectionEffect::draw(QPainter *painter)

{

    //currently sourceBoundingRect returns somehing like boundingRectFor and 

    //wrong rect for widgets with scroll area. As a workaround we can get the

    //original bounding rect assuming that the widget using the effect is the 

    //effect parent.

    QGraphicsItem * sourceItem;

    sourceItem = qobject_cast<QGraphicsItem *>( parent() );

    QPixmap pixmap;

    QPoint offset;

    pixmap = sourcePixmap( Qt::LogicalCoordinates,&offset, QGraphicsEffect::NoPad );

    painter->drawPixmap( offset, pixmap );

    if ( sourceItem ) {

        painter->save();

        painter->scale( 1, -1 );

        //for some reson tranlation does not work, translating cordinates by hand.

        QPointF reflectionOffset( 0.0, - 2.0 * sourceItem->boundingRect().height() );

        painter->drawPixmap( offset + reflectionOffset, pixmap );

        QRectF reflectionRect;

        reflectionRect.setTopLeft( reflectionOffset );

        reflectionRect.setHeight ( sourceItem->boundingRect().height() );

        reflectionRect.setWidth( pixmap.width() );

        painter->fillRect( reflectionRect, QColor::fromRgbF( 0, 0, 0, 0.5f ) );

        painter->restore();

    }

}

// EOF