Qt Reference Documentation

mainwindow.cpp Example File

webkit/fancybrowser/mainwindow.cpp
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 #include <QtGui>
 #include <QtWebKit>
 #include "mainwindow.h"


 MainWindow::MainWindow(const QUrl& url)
 {
     progress = 0;

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

     QNetworkProxyFactory::setUseSystemConfiguration(true);

     view = new QWebView(this);
     view->load(url);
     connect(view, SIGNAL(loadFinished(bool)), SLOT(adjustLocation()));
     connect(view, SIGNAL(titleChanged(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 *viewMenu = menuBar()->addMenu(tr("&View"));
     QAction* viewSourceAction = new QAction("Page Source", this);
     connect(viewSourceAction, SIGNAL(triggered()), SLOT(viewSource()));
     viewMenu->addAction(viewSourceAction);

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

     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);
     setUnifiedTitleAndToolBarOnMac(true);
 }

 void MainWindow::viewSource()
 {
     QNetworkAccessManager* accessManager = view->page()->networkAccessManager();
     QNetworkRequest request(view->url());
     QNetworkReply* reply = accessManager->get(request);
     connect(reply, SIGNAL(finished()), this, SLOT(slotSourceDownloaded()));
 }

 void MainWindow::slotSourceDownloaded()
 {
     QNetworkReply* reply = qobject_cast<QNetworkReply*>(const_cast<QObject*>(sender()));
     QTextEdit* textEdit = new QTextEdit(NULL);
     textEdit->setAttribute(Qt::WA_DeleteOnClose);
     textEdit->show();
     textEdit->setPlainText(reply->readAll());
     reply->deleteLater();
 }

 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);

     rotateImages(rotateAction->isChecked());
 }

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

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