New example: inverted ("night-mode"-like) rendering in QWebView.

2 files changed, 87 insertions, 0 deletions

diff --git a/webnightmode/webnightmode.cpp b/webnightmode/webnightmode.cpp
new file mode 100644
index 0000000..100d364
--- /dev/null
+++ b/webnightmode/webnightmode.cpp
@@ -0,0 +1,85 @@
+/****************************************************************************
+**
+** 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 <QtCore>
+#include <QtGui>
+#include <QtWebKit>
+
+#if QT_VERSION < 0x0040500
+#error You need Qt 4.5 or newer
+#endif
+
+class NightModeView : public QWebView
+{
+    Q_OBJECT
+
+public:
+
+    NightModeView(QWidget *parent = 0): QWebView(parent), invert(true) {
+        connect(this, SIGNAL(titleChanged(const QString&)), SLOT(setWindowTitle(const QString&)));
+        load(QUrl("http://maps.google.com"));
+    }
+
+private:
+
+    bool invert;
+
+    void paintEvent(QPaintEvent *event) {
+        QWebView::paintEvent(event);
+        if (invert) {
+            QPainter p(this);
+            p.setCompositionMode(QPainter::CompositionMode_Difference);
+            p.fillRect(event->rect(), Qt::white);
+            p.end();
+        }
+    }
+
+    void keyPressEvent(QKeyEvent *event) {
+        if (event->key() == Qt::Key_F3) {
+            invert = !invert;
+            update();
+            event->accept();
+            return;
+        }
+        QWebView::keyPressEvent(event);
+    }
+
+};
+
+#include "webnightmode.moc"
+
+int main(int argc, char **argv)
+{
+#ifdef Q_WS_X11
+    QApplication::setGraphicsSystem("raster");
+#endif
+
+    QApplication app(argc, argv);
+
+    NightModeView w;
+    w.show();
+
+    QMessageBox::information(&w, "Hint", "Use F3 to toggle night mode");
+
+    return app.exec();
+}
diff --git a/webnightmode/webnightmode.pro b/webnightmode/webnightmode.pro
new file mode 100644
index 0000000..a6b7f57
--- /dev/null
+++ b/webnightmode/webnightmode.pro
@@ -0,0 +1,2 @@
+SOURCES = webnightmode.cpp
+QT += network webkit