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</tr></table><h1 class="title">videowidget.cpp Example File<br /><span class="small-subtitle">video/videowidget/videowidget.cpp</span>

</h1>

<pre><span class="comment"> /****************************************************************************

** Contact: Nokia Corporation (qt-info@nokia.com)

** This file is part of the examples of the Qt Toolkit.

** $QT_BEGIN_LICENSE:LGPL$

** No Commercial Usage

** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

** GNU Lesser General Public License Usage

** Alternatively, this file may be used under the terms of the GNU Lesser

** General Public License version 2.1 as published by the Free Software

** Foundation and appearing in the file LICENSE.LGPL included in the

** packaging of this file. Please review the following information to

** ensure the GNU Lesser General Public License version 2.1 requirements

** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

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

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

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

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

** Nokia at qt-info@nokia.com.

** $QT_END_LICENSE$

****************************************************************************/</span>

#include "videowidget.h"

#include "videowidgetsurface.h"

#include <QtMultimedia>

VideoWidget::VideoWidget(QWidget *parent)

: QWidget(parent)

, surface(0)

{

setAutoFillBackground(false);

setAttribute(Qt::WA_NoSystemBackground, true);

setAttribute(Qt::WA_PaintOnScreen, true);

QPalette palette = this->palette();

palette.setColor(QPalette::Background, Qt::black);

setPalette(palette);

setSizePolicy(QSizePolicy::MinimumExpanding, QSizePolicy::MinimumExpanding);

surface = new VideoWidgetSurface(this);

}

VideoWidget::~VideoWidget()

{

delete surface;

}

QSize VideoWidget::sizeHint() const

{

return surface->surfaceFormat().sizeHint();

}

void VideoWidget::paintEvent(QPaintEvent *event)

{

QPainter painter(this);

if (surface->isStarted()) {

const QRect videoRect = surface->videoRect();

if (!videoRect.contains(event->rect())) {

QRegion region = event->region();

region.subtract(videoRect);

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QBrush brush = palette().background();

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foreach (const QRect &rect, region.rects())

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painter.fillRect(rect, brush);

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}

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surface->paint(&painter);

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} else {

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painter.fillRect(event->rect(), palette().background());

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}

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}

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void VideoWidget::resizeEvent(QResizeEvent *event)

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{

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QWidget::resizeEvent(event);

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surface->updateVideoRect();

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}</pre>

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