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mainwindow.cpp Example File
webkit/formextractor/mainwindow.cpp

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

 MainWindow::MainWindow()
 {
     createActions();
     createMenus();
     centralWidget = new FormExtractor(this);
     setCentralWidget(centralWidget);
 }

 void MainWindow::createActions()
 {
     exitAct = new QAction(tr("E&xit"), this);
     exitAct->setStatusTip(tr("Exit the application"));
     exitAct->setShortcut(tr("Ctrl+Q"));
     connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));

     aboutAct = new QAction(tr("&About"), this);
     aboutAct->setStatusTip(tr("Show the application's About box"));
     connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));

     aboutQtAct = new QAction(tr("About &Qt"), this);
     aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
     connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
 }

 void MainWindow::createMenus()
 {
     fileMenu = menuBar()->addMenu(tr("&File"));
     fileMenu->addAction(exitAct);

     menuBar()->addSeparator();

     helpMenu = menuBar()->addMenu(tr("&Help"));
     helpMenu->addAction(aboutAct);
     helpMenu->addAction(aboutQtAct);
 }

 void MainWindow::about()
 {
     QMessageBox::about(this, tr("About Form Extractor"),
         tr("The <b>Form Extractor</b> example demonstrates how to "
            "extract data from a web form using QtWebKit."));

 }