1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (developer.feedback@nokia.com)

     6 **

     7 ** This file is part of the HbWidgets module of the UI Extensions for Mobile.

     8 **

     9 ** GNU Lesser General Public License Usage

    10 ** This file may be used under the terms of the GNU Lesser General Public

    11 ** License version 2.1 as published by the Free Software Foundation and

    12 ** appearing in the file LICENSE.LGPL included in the packaging of this file.

    13 ** Please review the following information to ensure the GNU Lesser General

    14 ** Public License version 2.1 requirements will be met:

    15 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    16 **

    17 ** In addition, as a special exception, Nokia gives you certain additional

    18 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    19 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    20 **

    21 ** If you have questions regarding the use of this file, please contact

    22 ** Nokia at developer.feedback@nokia.com.

    23 **

    24 ****************************************************************************/

    25 

    26 #include <QPainter>

    27 

    28 #include "hbtransparentwindow.h"

    29 

    30 /*!

    31     @beta

    32     @hbwidgets

    33     \class HbTransparentWindow

    34     \brief The HbTransparentWindow class provides a easy way to create 

    35     transparent area to UI.

    36 

    37     A transparent window is transparent area in the UI which will show

    38     underlying content through. The HbMainWindow needs to be constructed

    39     with Hb::WindowFlagTransparent attribute to get the hole working. 

    40     

    41     Transparent window will erase all the pixels in the UI underneath the 

    42     widget. You can place content on top of transparent window normally.

    43     

    44     This widget is meant to be used when developer has own window surface

    45     running underneath the UI and this surface should be show through the 

    46     hole in the UI e.g. video playback through own surface or HW accelerated 

    47     3D content in own surface.

    48 

    49     \sa HbWidget, HbMainWindow, HbMainWindow::nativeBackgroundWindow

    50 */

    51 

    52 /*!

    53     \reimp

    54     \fn int HbToolButton::type() const

    55  */

    56 

    57 /*!

    58     Constructs a new HbTransparentWindow with \a parent.

    59 */

    60 HbTransparentWindow::HbTransparentWindow(QGraphicsItem *parent) :

    61     HbWidget(parent)

    62 {

    63 }

    64 

    65 

    66 /*!

    67     Destructs the transparent window.

    68  */

    69 HbTransparentWindow::~HbTransparentWindow()

    70 {

    71 }

    72 

    73 void HbTransparentWindow::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)

    74 {

    75     Q_UNUSED(widget)

    76     QPainter::CompositionMode compositionMode = painter->compositionMode();

    77     painter->setCompositionMode(QPainter::CompositionMode_Source);

    78     painter->fillRect(option->exposedRect, QColor(0,0,0,0));

    79     painter->setCompositionMode(compositionMode);

    80 }

    81 

    82 #include "moc_hbtransparentwindow.cpp"