main.cpp Example File

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  #include <QApplication>
  #include <QMessageBox>
  #include <QProgressBar>
  #include <QLineEdit>
  #include <QLabel>
  #include <QStatusBar>
  #include <QMainWindow>
  #include <QDesktopWidget>
  #include <QAbstractEventDispatcher>
  #include <QSignalMapper>
  #include <QVariant>
  #include <QSettings>

  #include "ui_mainwindow.h"

  static const char qtUrl[] = "qt.io";
  static const char iWebBrowser2DocumentationUrl[] = "http://msdn.microsoft.com/en-us/library/aa752127%28v=vs.85%29.aspx";
  static const char versionKey[] = "Version";
  static const char geometryKey[] = "Geometry";

  struct Location {
      Location(const QString &t = QString(), const QString &a = QString()) : title(t), address(a) {}

      QString title;
      QString address;
  };

  Q_DECLARE_METATYPE(Location)

  static QList<Location> defaultBookmarks()
  {
      QList<Location> result;
      result.append(Location(QStringLiteral("Qt"), QLatin1String(qtUrl)));
      result.append(Location(QStringLiteral("Digia"), QStringLiteral("http://qt.digia.com/")));
      result.append(Location(QStringLiteral("IWebBrowser2 MSDN Documentation"), QLatin1String(iWebBrowser2DocumentationUrl)));
      return result;
  }

  static bool containsAddress(const QList<Location> &locations, const QString &address)
  {
      for (const Location &location : locations) {
          if (location.address == address)
              return true;
      }
      return false;
  }

  static inline Location locationFromAction(const QAction *action)
  {
      return action->data().value<Location>();
  }

  static QList<Location> readBookMarks(QSettings &settings)
  {
      QList<Location> result;
      if (const int count = settings.beginReadArray(QStringLiteral("Bookmarks"))) {
          const QString titleKey = QStringLiteral("title");
          const QString addressKey = QStringLiteral("address");
          for (int i = 0; i < count; ++i) {
              settings.setArrayIndex(i);
              result.append(Location(settings.value(titleKey).toString(),
                                     settings.value(addressKey).toString()));
          }
      }
      settings.endArray();
      return result;
  }

  static void saveBookMarks(const QList<Location> &bookmarks, QSettings &settings)
  {
      const int count = bookmarks.size();
      settings.beginWriteArray(QStringLiteral("Bookmarks"));
      const QString titleKey = QStringLiteral("title");
      const QString addressKey = QStringLiteral("address");
      for (int i = 0; i < count; ++i) {
          settings.setArrayIndex(i);
          settings.setValue(titleKey, bookmarks.at(i).title);
          settings.setValue(addressKey, bookmarks.at(i).address);
      }
      settings.endArray();
  }

  class MainWindow : public QMainWindow, public Ui::MainWindow
  {
      Q_OBJECT
  public:
      MainWindow();
      ~MainWindow();

  public slots:
      void navigate(const QString &address);
      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(const QString &address);

      void on_actionGo_triggered();
      void on_actionNewWindow_triggered();
      void on_actionAddBookmark_triggered();
      void on_actionAbout_triggered();
      void on_actionAboutQt_triggered();
      void on_actionFileClose_triggered();

  private:
      inline const QString address() const
          { return addressEdit->text().trimmed(); }
      QList<Location> bookmarks() const;
      QAction *addLocation(const Location &location, QMenu *menu);
      inline void addBookmark(const Location &location)
          { bookmarkActions << addLocation(location, BookmarksMenu); }

      QProgressBar *pb;
      QLineEdit *addressEdit;
      QList<QAction *> bookmarkActions;
      QList<QAction *> historyActions;
      QSignalMapper locationActionMapper;
  };

  MainWindow::MainWindow()
  {
      setupUi(this);

      addressEdit = new QLineEdit;
      tbAddress->insertWidget(actionGo, new QLabel(tr("Address")));
      tbAddress->insertWidget(actionGo, addressEdit);

      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);

      connect(&locationActionMapper, SIGNAL(mapped(QString)), this, SLOT(navigate(QString)));

      QSettings settings(QSettings::IniFormat, QSettings::UserScope,
                         QCoreApplication::organizationName(), QCoreApplication::applicationName());
      const QByteArray restoredGeometry = settings.value(QLatin1String(geometryKey)).toByteArray();
      if (restoredGeometry.isEmpty() || !restoreGeometry(restoredGeometry)) {
          const QRect availableGeometry = QApplication::desktop()->availableGeometry(this);
          const QSize size = (availableGeometry.size() * 4) / 5;
          resize(size);
          move(availableGeometry.center() - QPoint(size.width(), size.height()) / 2);
      }
      const QString restoredVersion = settings.value(QLatin1String(versionKey)).toString();
      QList<Location> bookmarks = readBookMarks(settings);
      if (bookmarks.isEmpty() || restoredVersion.isEmpty())
          bookmarks = defaultBookmarks();
      for (const Location &bookmark : qAsConst(bookmarks))
          addBookmark(bookmark);
  }


  MainWindow::~MainWindow()
  {
      QSettings settings(QSettings::IniFormat, QSettings::UserScope,
                         QCoreApplication::organizationName(), QCoreApplication::applicationName());
      saveBookMarks(bookmarks(), settings);
      settings.setValue(QLatin1String(versionKey), QLatin1String(QT_VERSION_STR));
      settings.setValue(QLatin1String(geometryKey), saveGeometry());
  }

  QAction *MainWindow::addLocation(const Location &location, QMenu *menu)
  {
      QAction *action = menu->addAction(location.title);
      action->setData(QVariant::fromValue(location));
      locationActionMapper.setMapping(action, location.address);
      connect(action, SIGNAL(triggered()), &locationActionMapper, SLOT(map()));
      return action;
  }

  QList<Location> MainWindow::bookmarks() const
  {
      QList<Location> result;
      for (const QAction *action : qAsConst(bookmarkActions))
          result.append(locationFromAction(action));
      return result;
  }

  void MainWindow::on_actionAddBookmark_triggered()
  {
      if (!historyActions.isEmpty()) {
          const Location location = locationFromAction(historyActions.last());
          if (!containsAddress(bookmarks(), location.address))
              addBookmark(location);
      }
  }

  void MainWindow::on_WebBrowser_TitleChange(const QString &title)
  {
      // This is called multiple times after NavigateComplete().
      // Add new URLs to history here.
      setWindowTitle("Qt WebBrowser - " + title);
      const QString currentAddress = address();
      const QString historyAddress = historyActions.isEmpty() ?
          QString() : locationFromAction(historyActions.last()).address;
      if (currentAddress.isEmpty() || currentAddress == "about:blank" || currentAddress == historyAddress)
          return;
      historyActions << addLocation(Location(title, currentAddress), HistoryMenu);
      if (historyActions.size() > 10)
          delete historyActions.takeFirst();
  }

  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(const QString &url)
  {
      actionStop->setEnabled(false);
      const bool blocked = addressEdit->blockSignals(true);
      addressEdit->setText(url);
      addressEdit->blockSignals(blocked);
  }

  void MainWindow::on_actionGo_triggered()
  {
      navigate(address());
  }


  void MainWindow::navigate(const QString &url)
  {
      WebBrowser->dynamicCall("Navigate(const QString&)", url);
  }

  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);
      QCoreApplication::setApplicationVersion(QT_VERSION_STR);
      QCoreApplication::setApplicationName("Active Qt Web Browser");
      QCoreApplication::setOrganizationName("QtProject");
      MainWindow w;
      const QStringList arguments = QCoreApplication::arguments();
      const QString url = arguments.size() > 1 ?
          arguments.at(1) : QString::fromLatin1(qtUrl);
      w.navigate(url);
      w.show();
      return a.exec();
  }