mainwindow.cpp Example File
webkit/fancybrowser/mainwindow.cpp

 /****************************************************************************
 **
 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
 ** All rights reserved.
 ** Contact: Nokia Corporation (qt-info@nokia.com)
 **
 ** This file is part of the examples of the Qt Toolkit.
 **
 ** $QT_BEGIN_LICENSE:LGPL$
 ** Commercial Usage
 ** Licensees holding valid Qt Commercial licenses may use this file in
 ** accordance with the Qt Commercial License Agreement provided with the
 ** Software or, alternatively, in accordance with the terms contained in
 ** a written agreement between you and Nokia.
 **
 ** GNU Lesser General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU Lesser
 ** General Public License version 2.1 as published by the Free Software
 ** Foundation and appearing in the file LICENSE.LGPL included in the
 ** packaging of this file.  Please review the following information to
 ** ensure the GNU Lesser General Public License version 2.1 requirements
 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
 **
 ** In addition, as a special exception, Nokia gives you certain additional
 ** rights.  These rights are described in the Nokia Qt LGPL Exception
 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
 **
 ** GNU General Public License Usage
 ** Alternatively, this file may be used under the terms of the GNU
 ** General Public License version 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 the GNU General Public License version 3.0 requirements will be
 ** met: http://www.gnu.org/copyleft/gpl.html.
 **
 ** If you have questions regarding the use of this file, please contact
 ** Nokia at qt-info@nokia.com.
 ** $QT_END_LICENSE$
 **
 ****************************************************************************/

 #include <QtGui>
 #include <QtWebKit>
 #include "mainwindow.h"


 MainWindow::MainWindow()
 {
     progress = 0;

     QFile file;
     file.setFileName(":/jquery.min.js");
     file.open(QIODevice::ReadOnly);
     jQuery = file.readAll();
     file.close();

     view = new QWebView(this);
     view->load(QUrl("http://www.google.com/ncr"));
     connect(view, SIGNAL(loadFinished(bool)), SLOT(adjustLocation()));
     connect(view, SIGNAL(titleChanged(const QString&)), SLOT(adjustTitle()));
     connect(view, SIGNAL(loadProgress(int)), SLOT(setProgress(int)));
     connect(view, SIGNAL(loadFinished(bool)), SLOT(finishLoading(bool)));

     locationEdit = new QLineEdit(this);
     locationEdit->setSizePolicy(QSizePolicy::Expanding, locationEdit->sizePolicy().verticalPolicy());
     connect(locationEdit, SIGNAL(returnPressed()), SLOT(changeLocation()));

     QToolBar *toolBar = addToolBar(tr("Navigation"));
     toolBar->addAction(view->pageAction(QWebPage::Back));
     toolBar->addAction(view->pageAction(QWebPage::Forward));
     toolBar->addAction(view->pageAction(QWebPage::Reload));
     toolBar->addAction(view->pageAction(QWebPage::Stop));
     toolBar->addWidget(locationEdit);

     QMenu *effectMenu = menuBar()->addMenu(tr("&Effect"));
     effectMenu->addAction("Highlight all links", this, SLOT(highlightAllLinks()));

     QAction *rotateAction = new QAction(this);
     rotateAction->setIcon(style()->standardIcon(QStyle::SP_FileDialogDetailedView));
     rotateAction->setCheckable(true);
     rotateAction->setText(tr("Turn images upside down"));
     connect(rotateAction, SIGNAL(toggled(bool)), this, SLOT(rotateImages(bool)));
     effectMenu->addAction(rotateAction);

     QMenu *toolsMenu = menuBar()->addMenu(tr("&Tools"));
     toolsMenu->addAction(tr("Remove GIF images"), this, SLOT(removeGifImages()));
     toolsMenu->addAction(tr("Remove all inline frames"), this, SLOT(removeInlineFrames()));
     toolsMenu->addAction(tr("Remove all object elements"), this, SLOT(removeObjectElements()));
     toolsMenu->addAction(tr("Remove all embedded elements"), this, SLOT(removeEmbeddedElements()));

     setCentralWidget(view);
 }

 void MainWindow::adjustLocation()
 {
     locationEdit->setText(view->url().toString());
 }

 void MainWindow::changeLocation()
 {
     QUrl url = QUrl(locationEdit->text());
     view->load(url);
     view->setFocus();
 }

 void MainWindow::adjustTitle()
 {
     if (progress <= 0 || progress >= 100)
         setWindowTitle(view->title());
     else
         setWindowTitle(QString("%1 (%2%)").arg(view->title()).arg(progress));
 }

 void MainWindow::setProgress(int p)
 {
     progress = p;
     adjustTitle();
 }

 void MainWindow::finishLoading(bool)
 {
     progress = 100;
     adjustTitle();
     view->page()->mainFrame()->evaluateJavaScript(jQuery);
 }

 void MainWindow::highlightAllLinks()
 {
     QString code = "$('a').each( function () { $(this).css('background-color', 'yellow') } )";
     view->page()->mainFrame()->evaluateJavaScript(code);
 }

 void MainWindow::rotateImages(bool toggle)
 {
     QString code = "$('img').each( function () { $(this).css('-webkit-transition', '-webkit-transform 2s') } )";
     view->page()->mainFrame()->evaluateJavaScript(code);
     if (toggle)
         code = "$('img').each( function () { $(this).css('-webkit-transform', 'rotate(180deg)') } )";
     else
         code = "$('img').each( function () { $(this).css('-webkit-transform', 'rotate(0deg)') } )";
     view->page()->mainFrame()->evaluateJavaScript(code);
 }

 void MainWindow::removeGifImages()
 {
     QString code = "$('[src*=gif]').remove()";
     view->page()->mainFrame()->evaluateJavaScript(code);
 }

 void MainWindow::removeInlineFrames()
 {
     QString code = "$('iframe').remove()";
     view->page()->mainFrame()->evaluateJavaScript(code);
 }

 void MainWindow::removeObjectElements()
 {
     QString code = "$('object').remove()";
     view->page()->mainFrame()->evaluateJavaScript(code);
 }

 void MainWindow::removeEmbeddedElements()
 {
     QString code = "$('embed').remove()";
     view->page()->mainFrame()->evaluateJavaScript(code);
 }