|  | Home · All Classes · All Functions · Overviews

# videowidget.cpp Example File
multimedia/videowidget/videowidget.cpp

     /****************************************************************************
     **
     ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
     ** All rights reserved.
     ** Contact: Nokia Corporation (qt-info@nokia.com)
     **
     ** This file is part of the examples of the Qt Toolkit.
     **
     ** $QT_BEGIN_LICENSE:LGPL$
     ** Commercial Usage
     ** Licensees holding valid Qt Commercial licenses may use this file in
     ** accordance with the Qt Commercial License Agreement provided with the
     ** Software or, alternatively, in accordance with the terms contained in
     ** a written agreement between you and Nokia.
     **
     ** 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.
     **
     ** GNU General Public License Usage
     ** Alternatively, this file may be used under the terms of the GNU
     ** General Public License version 3.0 as published by the Free Software
     ** Foundation and appearing in the file LICENSE.GPL included in the
     ** packaging of this file.  Please review the following information to
     ** ensure the GNU General Public License version 3.0 requirements will be
     ** met: http://www.gnu.org/copyleft/gpl.html.
     **
     ** If you have questions regarding the use of this file, please contact
     ** Nokia at qt-info@nokia.com.
     ** $QT_END_LICENSE$
     **
     ****************************************************************************/

     #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->isActive()) {
             const QRect videoRect = surface->videoRect();

             if (!videoRect.contains(event->rect())) {
                 QRegion region = event->region();
                 region.subtract(videoRect);

                 QBrush brush = palette().background();

                 foreach (const QRect &rect, region.rects())
                     painter.fillRect(rect, brush);
             }

             surface->paint(&painter);
         } else {
             painter.fillRect(event->rect(), palette().background());
         }
     }

     void VideoWidget::resizeEvent(QResizeEvent *event)
     {
         QWidget::resizeEvent(event);

         surface->updateVideoRect();
     }