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/****************************************************************************
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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** This file is part of the examples of the Qt Toolkit.
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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****************************************************************************/
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#include "framecapture.h"
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FrameCapture::FrameCapture(): QObject(), m_percent(0)
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connect(&m_page, SIGNAL(loadProgress(int)), this, SLOT(printProgress(int)));
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connect(&m_page, SIGNAL(loadFinished(bool)), this, SLOT(saveResult(bool)));
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void FrameCapture::load(const QUrl &url, const QString &outputFileName)
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std::cout << "Loading " << qPrintable(url.toString()) << std::endl;
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int index = outputFileName.lastIndexOf('.');
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m_fileName = (index == -1) ? outputFileName + ".png" : outputFileName;
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m_page.mainFrame()->load(url);
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m_page.mainFrame()->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);
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m_page.mainFrame()->setScrollBarPolicy(Qt::Horizontal, Qt::ScrollBarAlwaysOff);
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void FrameCapture::printProgress(int percent)
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if (m_percent >= percent)
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while (m_percent++ < percent)
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std::cout << "#" << std::flush;
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void FrameCapture::saveResult(bool ok)
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std::cout << std::endl;
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// crude error-checking
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std::cerr << "Failed loading " << qPrintable(m_page.mainFrame()->url().toString()) << std::endl;
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// save each internal frame in different image files
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foreach(QWebFrame *frame, m_page.mainFrame()->childFrames()) {
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QString fileName(m_fileName);
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int index = m_fileName.lastIndexOf('.');
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fileName = fileName.insert(index, "_frame" + QString::number(++frameCounter));
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frame->setClipRenderToViewport(false);
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QImage image(frame->contentsSize(), QImage::Format_ARGB32_Premultiplied);
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image.fill(Qt::transparent);
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saveFrame(frame, image, fileName);
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// save the main frame
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m_page.setViewportSize(m_page.mainFrame()->contentsSize());
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QImage image(m_page.mainFrame()->contentsSize(), QImage::Format_ARGB32_Premultiplied);
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image.fill(Qt::transparent);
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saveFrame(m_page.mainFrame(), image, m_fileName);
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void FrameCapture::saveFrame(QWebFrame *frame, QImage image, QString fileName)
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QPainter painter(&image);
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painter.setRenderHint(QPainter::Antialiasing, true);
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painter.setRenderHint(QPainter::TextAntialiasing, true);
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painter.setRenderHint(QPainter::SmoothPixmapTransform, true);
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frame->render(&painter);
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image.save(fileName);