1 /*

     2 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: Reflection effect for Music Player Media Wall.

    15 *

    16 */

    17 

    18 #include <QPainter>

    19 #include <QGraphicsItem>

    20 #include <hbinstance.h>

    21 

    22 #include "mpreflectioneffect.h"

    23 

    24 

    25 /*!

    26     \class MpReflectionEffect

    27     \brief The MpReflectionEffect class provides a reflection effect.

    28 

    29     Renders the source with a reflection.

    30 */

    31 

    32 /*!

    33     Constructs a new MpReflectionEffect instance.

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

    35 */

    36 MpReflectionEffect::MpReflectionEffect(QObject *parent)

    37     : QGraphicsEffect( parent )

    38 {

    39 }

    40 

    41 /*!

    42     Destroys the effect.

    43 */

    44 MpReflectionEffect::~MpReflectionEffect()

    45 {

    46 }

    47 

    48 /*!

    49     \reimp

    50 */

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

    52 {

    53     QRectF retRect = rect;

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

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

    56 #ifdef __WINS__        

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

    58 #else

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

    60 #endif

    61     } else {

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

    63     }

    64     

    65     return retRect;

    66 }

    67 

    68 /*!

    69     \reimp

    70 */

    71 void MpReflectionEffect::draw(QPainter *painter)

    72 {

    73     //currently sourceBoundingRect returns somehing like boundingRectFor and 

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

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

    76     //effect parent.

    77     QGraphicsItem * sourceItem;

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

    79     QPixmap pixmap;

    80     QPoint offset;

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

    82     painter->drawPixmap( offset, pixmap );

    83     if ( sourceItem ) {

    84         painter->save();

    85         painter->scale( 1, -1 );

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

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

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

    89         QRectF reflectionRect;

    90         reflectionRect.setTopLeft( reflectionOffset );

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

    92         reflectionRect.setWidth( pixmap.width() );

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

    94         painter->restore();

    95     }

    96 }

    97 

    98 // EOF