7.15 实例：web浏览器.txt

qt的源代码

 class MainWindow : public QMainWindow, public Ui::MainWindow
 {
     Q_OBJECT
 public:
     MainWindow();
 public slots:
     void on_WebBrowser_TitleChange(const QString &title);
     void on_WebBrowser_ProgressChange(int a, int b);
     void on_WebBrowser_CommandStateChange(int cmd, bool on);
     void on_WebBrowser_BeforeNavigate();
     void on_WebBrowser_NavigateComplete(QString);
     void on_actionGo_triggered();
     void on_actionNewWindow_triggered();
     void on_actionAbout_triggered();
     void on_actionAboutQt_triggered();
     void on_actionFileClose_triggered();
 private:
     QProgressBar *pb;
 };
 MainWindow::MainWindow()
 {
     setupUi(this);
     connect(addressEdit, SIGNAL(returnPressed()), actionGo, SLOT(trigger()));
     connect(actionBack, SIGNAL(triggered()), WebBrowser, SLOT(GoBack()));
     connect(actionForward, SIGNAL(triggered()), WebBrowser, SLOT(GoForward()));
     connect(actionStop, SIGNAL(triggered()), WebBrowser, SLOT(Stop()));
     connect(actionRefresh, SIGNAL(triggered()), WebBrowser, SLOT(Refresh()));
     connect(actionHome, SIGNAL(triggered()), WebBrowser, SLOT(GoHome()));
     connect(actionSearch, SIGNAL(triggered()), WebBrowser, SLOT(GoSearch()));
     pb = new QProgressBar(statusBar());
     pb->setTextVisible(false);
     pb->hide();
     statusBar()->addPermanentWidget(pb);
     WebBrowser->dynamicCall("GoHome()");
 }
void MainWindow::on_WebBrowser_TitleChange(const QString &title)
 {
     setWindowTitle("Qt WebBrowser - " + title);
 }
 void MainWindow::on_WebBrowser_ProgressChange(int a, int b)
 {
     if (a <= 0 || b <= 0) {
         pb->hide();
         return;
     }
     pb->show();
     pb->setRange(0, b);
     pb->setValue(a);
 }
 void MainWindow::on_WebBrowser_CommandStateChange(int cmd, bool on)
 {
     switch (cmd) {
     case 1:
         actionForward->setEnabled(on);
         break;
     case 2:
         actionBack->setEnabled(on);
         break;
     }
 }
 void MainWindow::on_WebBrowser_BeforeNavigate()
 {
     actionStop->setEnabled(true);
 }
 void MainWindow::on_WebBrowser_NavigateComplete(QString)
 {
     actionStop->setEnabled(false);
 }
void MainWindow::on_actionGo_triggered()
 {
     WebBrowser->dynamicCall("Navigate(const QString&)", addressEdit->text());
 }
 void MainWindow::on_actionNewWindow_triggered()
 {
     MainWindow *window = new MainWindow;
     window->show();
     if (addressEdit->text().isEmpty())
         return;
     window->addressEdit->setText(addressEdit->text());
     window->actionStop->setEnabled(true);
     window->on_actionGo_triggered();
 }
void MainWindow::on_actionAbout_triggered()
 {
     QMessageBox::about(this, tr("About WebBrowser"),
       tr("This Example has been created using the ActiveQt integration into Qt Designer.\n"
       "It demonstrates the use of QAxWidget to embed the Internet Explorer ActiveX\n"
                    "control into a Qt application."));
 }
 void MainWindow::on_actionAboutQt_triggered()
 {
     QMessageBox::aboutQt(this, tr("About Qt"));
 }
 void MainWindow::on_actionFileClose_triggered()
 {
     close();
 }
 #include "main.moc"

 int main(int argc, char ** argv)
 {
     QApplication a(argc, argv);
     MainWindow w;
 #if defined(Q_OS_WINCE)
     w.showMaximized();
 #else
     w.show();
 #endif
     return a.exec();
 }