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/****************************************************************************
**
** Copyright (C) 2010 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 <QNetworkAccessManager>
#include <QNetworkReply>
#include <QBuffer>
#include <QtConcurrentRun>
#include <QFutureWatcher>
#include <QDir>
class RendererReply : public QNetworkReply
{
Q_OBJECT
public:
RendererReply(QObject* object, const QNetworkRequest& request)
: QNetworkReply(object)
, position(0)
{
setRequest(request);
setOperation(QNetworkAccessManager::GetOperation);
setHeader(QNetworkRequest::ContentTypeHeader,QVariant("image/png"));
open(ReadOnly|Unbuffered);
setUrl(request.url());
QString pattern = request.url().queryItemValue("pattern");
Qt::BrushStyle brushStyle = Qt::SolidPattern;
if (pattern == "dense")
brushStyle = Qt::Dense2Pattern;
else if (pattern == "cross")
brushStyle = Qt::CrossPattern;
else if (pattern == "diagonal")
brushStyle = Qt::FDiagPattern;
const QString radiusString = request.url().queryItemValue("radius");
const QString widthString = request.url().queryItemValue("width");
const QString heightString = request.url().queryItemValue("height");
const QString colorString = request.url().queryItemValue("color");
QColor color(colorString);
bool ok;
int radius = radiusString.toInt(&ok);
if (!ok)
radius = 5;
QSize size;
size.setWidth(widthString.toInt(&ok));
if (!ok)
size.setWidth(100);
size.setHeight(heightString.toInt(&ok));
if (!ok)
size.setHeight(100);
connect(&watcher, SIGNAL(finished()), SLOT(generateDone()));
QFuture<QByteArray> future = QtConcurrent::run<QByteArray>(generate, size, brushStyle, radius, color);
watcher.setFuture(future);
}
qint64 readData(char* data, qint64 maxSize)
{
const qint64 readSize = qMin(maxSize, (qint64)(buffer.size() - position));
memcpy(data, buffer.constData() + position, readSize);
position += readSize;
return readSize;
}
virtual qint64 bytesAvailable() const
{
return buffer.size() - position;
}
virtual qint64 pos () const
{
return position;
}
virtual bool seek( qint64 pos )
{
if (pos < 0 || pos >= buffer.size())
return false;
position = pos;
return true;
}
virtual qint64 size () const
{
return buffer.size();
}
static QByteArray generate(const QSize& size, const Qt::BrushStyle style, int radius, const QColor& color)
{
QImage image(size, QImage::Format_ARGB32_Premultiplied);
image.fill(0);
QPainter painter(&image);
QPainterPath path;
path.addRoundedRect(QRectF(QPoint(0, 0), size), radius, radius);
painter.fillPath(path, QBrush(color, style));
QByteArray saveData;
QBuffer b(&saveData);
image.save(&b, "PNG");
return saveData;
}
public slots:
void generateDone()
{
setHeader(QNetworkRequest::ContentTypeHeader, "image/png");
position = 0;
buffer = watcher.result();
emit readyRead();
emit finished();
}
void abort()
{
}
public:
QNetworkReply* rawReply;
private:
QFutureWatcher<QByteArray> watcher;
QByteArray buffer;
int position;
};
class UrlBasedRenderer : public QNetworkAccessManager
{
public:
UrlBasedRenderer(QObject* parent = 0) : QNetworkAccessManager(parent)
{
}
virtual QNetworkReply *createRequest(Operation op, const QNetworkRequest &request, QIODevice *outgoingData)
{
if (op != GetOperation || request.url().scheme() != "qt-render" || request.url().host() != "button")
return QNetworkAccessManager::createRequest(op, request, outgoingData);
return new RendererReply(this, request);
}
};
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QWebView webView;
UrlBasedRenderer urlBasedRenderer;
webView.page()->setNetworkAccessManager(&urlBasedRenderer);
webView.setHtml("<HTML><BODY><IMG src=\"qt-render://button?width=100&height=100&radius=5&color=green&pattern=dense\" /></BODY></HTML>");
webView.show();
return app.exec();
}
#include <main.moc>
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