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    41 

    42 #include <QtGui>

    43 #include <QtWebKit>

    44 #include "mainwindow.h"

    45 

    46 //! [1]

    47 

    48 MainWindow::MainWindow()

    49 {

    50     progress = 0;

    51 

    52     QFile file;

    53     file.setFileName(":/jquery.min.js");

    54     file.open(QIODevice::ReadOnly);

    55     jQuery = file.readAll();

    56     file.close();

    57 //! [1]

    58 

    59     QNetworkProxyFactory::setUseSystemConfiguration(true);

    60 

    61 //! [2]

    62     view = new QWebView(this);

    63     view->load(QUrl("http://www.google.com/ncr"));

    64     connect(view, SIGNAL(loadFinished(bool)), SLOT(adjustLocation()));

    65     connect(view, SIGNAL(titleChanged(const QString&)), SLOT(adjustTitle()));

    66     connect(view, SIGNAL(loadProgress(int)), SLOT(setProgress(int)));

    67     connect(view, SIGNAL(loadFinished(bool)), SLOT(finishLoading(bool)));

    68 

    69     locationEdit = new QLineEdit(this);

    70     locationEdit->setSizePolicy(QSizePolicy::Expanding, locationEdit->sizePolicy().verticalPolicy());

    71     connect(locationEdit, SIGNAL(returnPressed()), SLOT(changeLocation()));

    72 

    73     QToolBar *toolBar = addToolBar(tr("Navigation"));

    74     toolBar->addAction(view->pageAction(QWebPage::Back));

    75     toolBar->addAction(view->pageAction(QWebPage::Forward));

    76     toolBar->addAction(view->pageAction(QWebPage::Reload));

    77     toolBar->addAction(view->pageAction(QWebPage::Stop));

    78     toolBar->addWidget(locationEdit);

    79 //! [2]

    80 

    81 //! [3]

    82     QMenu *effectMenu = menuBar()->addMenu(tr("&Effect"));

    83     effectMenu->addAction("Highlight all links", this, SLOT(highlightAllLinks()));

    84 

    85     QAction *rotateAction = new QAction(this);

    86     rotateAction->setIcon(style()->standardIcon(QStyle::SP_FileDialogDetailedView));

    87     rotateAction->setCheckable(true);

    88     rotateAction->setText(tr("Turn images upside down"));

    89     connect(rotateAction, SIGNAL(toggled(bool)), this, SLOT(rotateImages(bool)));

    90     effectMenu->addAction(rotateAction);

    91 

    92     QMenu *toolsMenu = menuBar()->addMenu(tr("&Tools"));

    93     toolsMenu->addAction(tr("Remove GIF images"), this, SLOT(removeGifImages()));

    94     toolsMenu->addAction(tr("Remove all inline frames"), this, SLOT(removeInlineFrames()));

    95     toolsMenu->addAction(tr("Remove all object elements"), this, SLOT(removeObjectElements()));

    96     toolsMenu->addAction(tr("Remove all embedded elements"), this, SLOT(removeEmbeddedElements()));

    97 

    98     setCentralWidget(view);

    99     setUnifiedTitleAndToolBarOnMac(true);

   100 }

   101 //! [3]

   102 

   103 //! [4]

   104 void MainWindow::adjustLocation()

   105 {

   106     locationEdit->setText(view->url().toString());

   107 }

   108 

   109 void MainWindow::changeLocation()

   110 {

   111     QUrl url = QUrl(locationEdit->text());

   112     view->load(url);

   113     view->setFocus();

   114 }

   115 //! [4]

   116 

   117 //! [5]

   118 void MainWindow::adjustTitle()

   119 {

   120     if (progress <= 0 || progress >= 100)

   121         setWindowTitle(view->title());

   122     else

   123         setWindowTitle(QString("%1 (%2%)").arg(view->title()).arg(progress));

   124 }

   125 

   126 void MainWindow::setProgress(int p)

   127 {

   128     progress = p;

   129     adjustTitle();

   130 }

   131 //! [5]

   132 

   133 //! [6]

   134 void MainWindow::finishLoading(bool)

   135 {

   136     progress = 100;

   137     adjustTitle();

   138     view->page()->mainFrame()->evaluateJavaScript(jQuery);

   139 }

   140 //! [6]

   141 

   142 //! [7]

   143 void MainWindow::highlightAllLinks()

   144 {

   145     QString code = "$('a').each( function () { $(this).css('background-color', 'yellow') } )";

   146     view->page()->mainFrame()->evaluateJavaScript(code);

   147 }

   148 //! [7]

   149 

   150 //! [8]

   151 void MainWindow::rotateImages(bool toggle)

   152 {

   153     QString code = "$('img').each( function () { $(this).css('-webkit-transition', '-webkit-transform 2s') } )";

   154     view->page()->mainFrame()->evaluateJavaScript(code);

   155     if (toggle)

   156         code = "$('img').each( function () { $(this).css('-webkit-transform', 'rotate(180deg)') } )";

   157     else

   158         code = "$('img').each( function () { $(this).css('-webkit-transform', 'rotate(0deg)') } )";

   159     view->page()->mainFrame()->evaluateJavaScript(code);

   160 }

   161 //! [8]

   162 

   163 //! [9]

   164 void MainWindow::removeGifImages()

   165 {

   166     QString code = "$('[src*=gif]').remove()";

   167     view->page()->mainFrame()->evaluateJavaScript(code);

   168 }

   169 

   170 void MainWindow::removeInlineFrames()

   171 {

   172     QString code = "$('iframe').remove()";

   173     view->page()->mainFrame()->evaluateJavaScript(code);

   174 }

   175 

   176 void MainWindow::removeObjectElements()

   177 {

   178     QString code = "$('object').remove()";

   179     view->page()->mainFrame()->evaluateJavaScript(code);

   180 }

   181 

   182 void MainWindow::removeEmbeddedElements()

   183 {

   184     QString code = "$('embed').remove()";

   185     view->page()->mainFrame()->evaluateJavaScript(code);

   186 }

   187 //! [9]

   188