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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Qt Software Information (qt-info@nokia.com)
**
** This file is part of the Graphics Dojo project on Qt Labs.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 or 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 GNU
** General Public Licensing requirements will be met:
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at qt-sales@nokia.com.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/
#include <QtGui/QApplication>
#include <QWebView>
#include <QWebElement>
#include <QWebPage>
#include <QWebFrame>
#include <QNetworkReply>
#include <QNetworkAccessManager>
#include <QTimer>
#include <QBuffer>
#include <QDebug>
#include <QFile>
#include <QImage>
namespace {
class RendererNetworkReply : public QNetworkReply
{
Q_OBJECT
QBuffer buffer;
public:
RendererNetworkReply(QWebFrame* frame,const QNetworkRequest & r)
: QNetworkReply(frame)
{
setRequest(r);
QString selector = r.url().toString(QUrl::RemoveScheme|QUrl::RemoveQuery);
selector = QUrl::fromPercentEncoding(selector.toAscii());
setOperation(QNetworkAccessManager::GetOperation);
setHeader(QNetworkRequest::ContentTypeHeader,QVariant("image/png"));
open(ReadOnly|Unbuffered);
setUrl(r.url());
QWebElement element = frame->findFirstElement(selector);
QImage img(element.geometry().size(),QImage::Format_ARGB32);
img.fill(0);
{
QPainter painter(&img);
element.render(&painter);
}
buffer.open(QIODevice::WriteOnly);
img.save(&buffer,"png");
buffer.close();
buffer.open(QIODevice::ReadOnly);
QTimer::singleShot(0,this,SIGNAL(readyRead()));
QTimer::singleShot(0,this,SIGNAL(finished()));
}
virtual qint64 readData(char* data, qint64 maxSize)
{
return buffer.read(data,maxSize);
}
virtual qint64 bytesAvailable() const
{
return buffer.bytesAvailable();
}
void setData(const QByteArray & data)
{
buffer.setData(data);
buffer.open(QIODevice::ReadOnly);
}
void abort()
{
}
};
class RendererNetworkAccessManager : public QNetworkAccessManager
{
QWebPage* webPage;
public:
RendererNetworkAccessManager(QWebPage* page) : QNetworkAccessManager(page),webPage(page)
{
}
QNetworkReply* createRequest(Operation op, const QNetworkRequest & req, QIODevice* outgoingData)
{
if (req.url().scheme() == "render" && op == GetOperation) {
return new RendererNetworkReply(webPage->currentFrame(),req);
} else
return QNetworkAccessManager::createRequest(op,req,outgoingData);
}
};
};
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QWebSettings::globalSettings()->setAttribute(QWebSettings::DeveloperExtrasEnabled,true);
QWebView w;
w.page()->setNetworkAccessManager(new RendererNetworkAccessManager(w.page()));
QFile f("example.html");
f.open(QIODevice::ReadOnly);
w.setHtml(f.readAll());
f.close();
w.show();
return a.exec();
}
#include <main.moc>
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