framecapture.cpp Example File

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 #include "framecapture.h"

 #include <iostream>
 #include <QtWebKit>

 FrameCapture::FrameCapture(): QObject(), m_percent(0)
 {
     connect(&m_page, SIGNAL(loadProgress(int)), this, SLOT(printProgress(int)));
     connect(&m_page, SIGNAL(loadFinished(bool)), this, SLOT(saveResult(bool)));
 }

 void FrameCapture::load(const QUrl &url, const QString &outputFileName)
 {
     std::cout << "Loading " << qPrintable(url.toString()) << std::endl;
     m_percent = 0;
     int index = outputFileName.lastIndexOf('.');
     m_fileName = (index == -1) ? outputFileName + ".png" : outputFileName;
     m_page.mainFrame()->load(url);
     m_page.mainFrame()->setScrollBarPolicy(Qt::Vertical, Qt::ScrollBarAlwaysOff);
     m_page.mainFrame()->setScrollBarPolicy(Qt::Horizontal, Qt::ScrollBarAlwaysOff);
     m_page.setViewportSize(QSize(1024, 768));
 }

 void FrameCapture::printProgress(int percent)
 {
     if (m_percent >= percent)
         return;

     while (m_percent++ < percent)
         std::cout << "#" << std::flush;
 }

 void FrameCapture::saveResult(bool ok)
 {
     std::cout << std::endl;

     // crude error-checking
     if (!ok) {
         std::cerr << "Failed loading " << qPrintable(m_page.mainFrame()->url().toString()) << std::endl;
         emit finished();
         return;
     }

     // save each frame in different image files
     saveFrame(m_page.mainFrame());

     emit finished();
 }

 void FrameCapture::saveFrame(QWebFrame *frame)
 {
     static int frameCounter = 0;

     QString fileName(m_fileName);
     if (frameCounter) {
         int index = m_fileName.lastIndexOf('.');
         fileName = fileName.insert(index, "_frame" + QString::number(frameCounter));
     }

     QImage image(frame->contentsSize(), QImage::Format_ARGB32_Premultiplied);
     image.fill(Qt::transparent);

     QPainter painter(&image);
     painter.setRenderHint(QPainter::Antialiasing, true);
     painter.setRenderHint(QPainter::TextAntialiasing, true);
     painter.setRenderHint(QPainter::SmoothPixmapTransform, true);
     frame->documentElement().render(&painter);
     painter.end();

     image.save(fileName);

     ++frameCounter;
     foreach(QWebFrame *childFrame, frame->childFrames())
         saveFrame(childFrame);
 }