Added the Deconstructive HTML dojo

1 files changed, 122 insertions, 0 deletions

diff --git a/deconstructive/main.cpp b/deconstructive/main.cpp
new file mode 100644
index 0000000..46ed597
--- /dev/null
+++ b/deconstructive/main.cpp
@@ -0,0 +1,122 @@
+/****************************************************************************
+**
+** 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>
+
+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);
+                QPixmap pxm(element.geometry().size());
+                pxm.fill(Qt::transparent);
+                {
+                    QPainter painter(&pxm);
+                    element.render(&painter);
+                }
+                buffer.open(QIODevice::WriteOnly);
+                pxm.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>