Qt 5.6 | Qt WebEngine | WebEngine Demo Browser Example | browsermainwindow.cpp Example File

Qt 5.6.3 Reference Documentation

# browsermainwindow.cpp Example File

webenginewidgets/demobrowser/browsermainwindow.cpp

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      ** Contact: https://www.qt.io/licensing/
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      ** This file is part of the demonstration applications of the Qt Toolkit.
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      #include "browsermainwindow.h"

      #include "autosaver.h"
      #include "bookmarks.h"
      #include "browserapplication.h"
      #include "chasewidget.h"
      #include "downloadmanager.h"
      #include "history.h"
      #include "settings.h"
      #include "tabwidget.h"
      #include "toolbarsearch.h"
      #include "ui_passworddialog.h"
      #include "webview.h"

      #include <QtCore/QSettings>

      #include <QtWidgets/QDesktopWidget>
      #include <QtWidgets/QFileDialog>
      #include <QtWidgets/QPlainTextEdit>
      #include <QtPrintSupport/QPrintDialog>
      #include <QtPrintSupport/QPrintPreviewDialog>
      #include <QtPrintSupport/QPrinter>
      #include <QtWidgets/QMenuBar>
      #include <QtWidgets/QMessageBox>
      #include <QtWidgets/QStatusBar>
      #include <QtWidgets/QToolBar>
      #include <QtWidgets/QInputDialog>

      #include <QWebEngineHistory>
      #include <QWebEngineProfile>
      #include <QWebEngineSettings>

      #include <QtCore/QDebug>

      template<typename Arg, typename R, typename C>
      struct InvokeWrapper {
          R *receiver;
          void (C::*memberFun)(Arg);
          void operator()(Arg result) {
              (receiver->*memberFun)(result);
          }
      };

      template<typename Arg, typename R, typename C>
      InvokeWrapper<Arg, R, C> invoke(R *receiver, void (C::*memberFun)(Arg))
      {
          InvokeWrapper<Arg, R, C> wrapper = {receiver, memberFun};
          return wrapper;
      }

      const char *BrowserMainWindow::defaultHome = "http://qt.io/";

      BrowserMainWindow::BrowserMainWindow(QWidget *parent, Qt::WindowFlags flags)
          : QMainWindow(parent, flags)
          , m_tabWidget(new TabWidget(this))
          , m_autoSaver(new AutoSaver(this))
          , m_historyBack(0)
          , m_historyForward(0)
          , m_stop(0)
          , m_reload(0)
      {
          setToolButtonStyle(Qt::ToolButtonFollowStyle);
          setAttribute(Qt::WA_DeleteOnClose, true);
          statusBar()->setSizeGripEnabled(true);
          setupMenu();
          setupToolBar();

          QWidget *centralWidget = new QWidget(this);
          BookmarksModel *bookmarksModel = BrowserApplication::bookmarksManager()->bookmarksModel();
          m_bookmarksToolbar = new BookmarksToolBar(bookmarksModel, this);
          connect(m_bookmarksToolbar, SIGNAL(openUrl(QUrl)),
                  m_tabWidget, SLOT(loadUrlInCurrentTab(QUrl)));
          connect(m_bookmarksToolbar->toggleViewAction(), SIGNAL(toggled(bool)),
                  this, SLOT(updateBookmarksToolbarActionText(bool)));

          QVBoxLayout *layout = new QVBoxLayout;
          layout->setSpacing(0);
          layout->setMargin(0);
      #if defined(Q_OS_OSX)
          layout->addWidget(m_bookmarksToolbar);
          layout->addWidget(new QWidget); // <- OS X tab widget style bug
      #else
          addToolBarBreak();
          addToolBar(m_bookmarksToolbar);
      #endif
          layout->addWidget(m_tabWidget);
          centralWidget->setLayout(layout);
          setCentralWidget(centralWidget);

          connect(m_tabWidget, SIGNAL(loadPage(QString)),
              this, SLOT(loadPage(QString)));
          connect(m_tabWidget, SIGNAL(setCurrentTitle(QString)),
              this, SLOT(slotUpdateWindowTitle(QString)));
          connect(m_tabWidget, SIGNAL(showStatusBarMessage(QString)),
                  statusBar(), SLOT(showMessage(QString)));
          connect(m_tabWidget, SIGNAL(linkHovered(QString)),
                  statusBar(), SLOT(showMessage(QString)));
          connect(m_tabWidget, SIGNAL(loadProgress(int)),
                  this, SLOT(slotLoadProgress(int)));
          connect(m_tabWidget, SIGNAL(tabsChanged()),
                  m_autoSaver, SLOT(changeOccurred()));
          connect(m_tabWidget, SIGNAL(geometryChangeRequested(QRect)),
                  this, SLOT(geometryChangeRequested(QRect)));
      #if defined(QWEBENGINEPAGE_PRINTREQUESTED)
          connect(m_tabWidget, SIGNAL(printRequested(QWebEngineFrame*)),
                  this, SLOT(printRequested(QWebEngineFrame*)));
      #endif
          connect(m_tabWidget, SIGNAL(menuBarVisibilityChangeRequested(bool)),
                  menuBar(), SLOT(setVisible(bool)));
          connect(m_tabWidget, SIGNAL(statusBarVisibilityChangeRequested(bool)),
                  statusBar(), SLOT(setVisible(bool)));
          connect(m_tabWidget, SIGNAL(toolBarVisibilityChangeRequested(bool)),
                  m_navigationBar, SLOT(setVisible(bool)));
          connect(m_tabWidget, SIGNAL(toolBarVisibilityChangeRequested(bool)),
                  m_bookmarksToolbar, SLOT(setVisible(bool)));
      #if defined(Q_OS_OSX)
          connect(m_tabWidget, SIGNAL(lastTabClosed()),
                  this, SLOT(close()));
      #else
          connect(m_tabWidget, SIGNAL(lastTabClosed()),
                  m_tabWidget, SLOT(newTab()));
      #endif

          slotUpdateWindowTitle();
          loadDefaultState();
          m_tabWidget->newTab();

          int size = m_tabWidget->lineEditStack()->sizeHint().height();
          m_navigationBar->setIconSize(QSize(size, size));

      }

      BrowserMainWindow::~BrowserMainWindow()
      {
          m_autoSaver->changeOccurred();
          m_autoSaver->saveIfNeccessary();
      }

      void BrowserMainWindow::loadDefaultState()
      {
          QSettings settings;
          settings.beginGroup(QLatin1String("BrowserMainWindow"));
          QByteArray data = settings.value(QLatin1String("defaultState")).toByteArray();
          restoreState(data);
          settings.endGroup();
      }

      QSize BrowserMainWindow::sizeHint() const
      {
          QRect desktopRect = QApplication::desktop()->screenGeometry();
          QSize size = desktopRect.size() * qreal(0.9);
          return size;
      }

      void BrowserMainWindow::save()
      {
          BrowserApplication::instance()->saveSession();

          QSettings settings;
          settings.beginGroup(QLatin1String("BrowserMainWindow"));
          QByteArray data = saveState(false);
          settings.setValue(QLatin1String("defaultState"), data);
          settings.endGroup();
      }

      static const qint32 BrowserMainWindowMagic = 0xba;

      QByteArray BrowserMainWindow::saveState(bool withTabs) const
      {
          int version = 2;
          QByteArray data;
          QDataStream stream(&data, QIODevice::WriteOnly);

          stream << qint32(BrowserMainWindowMagic);
          stream << qint32(version);

          stream << size();
          stream << !m_navigationBar->isHidden();
          stream << !m_bookmarksToolbar->isHidden();
          stream << !statusBar()->isHidden();
          if (withTabs)
              stream << tabWidget()->saveState();
          else
              stream << QByteArray();
          return data;
      }

      bool BrowserMainWindow::restoreState(const QByteArray &state)
      {
          int version = 2;
          QByteArray sd = state;
          QDataStream stream(&sd, QIODevice::ReadOnly);
          if (stream.atEnd())
              return false;

          qint32 marker;
          qint32 v;
          stream >> marker;
          stream >> v;
          if (marker != BrowserMainWindowMagic || v != version)
              return false;

          QSize size;
          bool showToolbar;
          bool showBookmarksBar;
          bool showStatusbar;
          QByteArray tabState;

          stream >> size;
          stream >> showToolbar;
          stream >> showBookmarksBar;
          stream >> showStatusbar;
          stream >> tabState;

          resize(size);

          m_navigationBar->setVisible(showToolbar);
          updateToolbarActionText(showToolbar);

          m_bookmarksToolbar->setVisible(showBookmarksBar);
          updateBookmarksToolbarActionText(showBookmarksBar);

          statusBar()->setVisible(showStatusbar);
          updateStatusbarActionText(showStatusbar);

          if (!tabWidget()->restoreState(tabState))
              return false;

          return true;
      }

      void BrowserMainWindow::runScriptOnOpenViews(const QString &source)
      {
          for (int i =0; i < tabWidget()->count(); ++i)
              tabWidget()->webView(i)->page()->runJavaScript(source);
      }

      void BrowserMainWindow::setupMenu()
      {
          new QShortcut(QKeySequence(Qt::Key_F6), this, SLOT(slotSwapFocus()));

          // File
          QMenu *fileMenu = menuBar()->addMenu(tr("&File"));

          fileMenu->addAction(tr("&New Window"), this, SLOT(slotFileNew()), QKeySequence::New);
          fileMenu->addAction(m_tabWidget->newTabAction());
          fileMenu->addAction(tr("&Open File..."), this, SLOT(slotFileOpen()), QKeySequence::Open);
          fileMenu->addAction(tr("Open &Location..."), this,
                      SLOT(slotSelectLineEdit()), QKeySequence(Qt::ControlModifier + Qt::Key_L));
          fileMenu->addSeparator();
          fileMenu->addAction(m_tabWidget->closeTabAction());
          fileMenu->addSeparator();
      #if defined(QWEBENGINE_SAVE_AS_FILE)
          fileMenu->addAction(tr("&Save As..."), this,
                      SLOT(slotFileSaveAs()), QKeySequence(QKeySequence::Save));
          fileMenu->addSeparator();
      #endif
          BookmarksManager *bookmarksManager = BrowserApplication::bookmarksManager();
          fileMenu->addAction(tr("&Import Bookmarks..."), bookmarksManager, SLOT(importBookmarks()));
          fileMenu->addAction(tr("&Export Bookmarks..."), bookmarksManager, SLOT(exportBookmarks()));
          fileMenu->addSeparator();
      #if defined(QWEBENGINEPAGE_PRINT)
          fileMenu->addAction(tr("P&rint Preview..."), this, SLOT(slotFilePrintPreview()));
          fileMenu->addAction(tr("&Print..."), this, SLOT(slotFilePrint()), QKeySequence::Print);
          fileMenu->addSeparator();
      #endif
          QAction *action = fileMenu->addAction(tr("Private &Browsing..."), this, SLOT(slotPrivateBrowsing()));
          action->setCheckable(true);
          action->setChecked(BrowserApplication::instance()->privateBrowsing());
          connect(BrowserApplication::instance(), SIGNAL(privateBrowsingChanged(bool)), action, SLOT(setChecked(bool)));
          fileMenu->addSeparator();

      #if defined(Q_OS_OSX)
          fileMenu->addAction(tr("&Quit"), BrowserApplication::instance(), SLOT(quitBrowser()), QKeySequence(Qt::CTRL | Qt::Key_Q));
      #else
          fileMenu->addAction(tr("&Quit"), this, SLOT(close()), QKeySequence(Qt::CTRL | Qt::Key_Q));
      #endif

          // Edit
          QMenu *editMenu = menuBar()->addMenu(tr("&Edit"));
          QAction *m_undo = editMenu->addAction(tr("&Undo"));
          m_undo->setShortcuts(QKeySequence::Undo);
          m_tabWidget->addWebAction(m_undo, QWebEnginePage::Undo);
          QAction *m_redo = editMenu->addAction(tr("&Redo"));
          m_redo->setShortcuts(QKeySequence::Redo);
          m_tabWidget->addWebAction(m_redo, QWebEnginePage::Redo);
          editMenu->addSeparator();
          QAction *m_cut = editMenu->addAction(tr("Cu&t"));
          m_cut->setShortcuts(QKeySequence::Cut);
          m_tabWidget->addWebAction(m_cut, QWebEnginePage::Cut);
          QAction *m_copy = editMenu->addAction(tr("&Copy"));
          m_copy->setShortcuts(QKeySequence::Copy);
          m_tabWidget->addWebAction(m_copy, QWebEnginePage::Copy);
          QAction *m_paste = editMenu->addAction(tr("&Paste"));
          m_paste->setShortcuts(QKeySequence::Paste);
          m_tabWidget->addWebAction(m_paste, QWebEnginePage::Paste);
          editMenu->addSeparator();

          QAction *m_find = editMenu->addAction(tr("&Find"));
          m_find->setShortcuts(QKeySequence::Find);
          connect(m_find, SIGNAL(triggered()), this, SLOT(slotEditFind()));

          QAction *m_findNext = editMenu->addAction(tr("&Find Next"));
          m_findNext->setShortcuts(QKeySequence::FindNext);
          connect(m_findNext, SIGNAL(triggered()), this, SLOT(slotEditFindNext()));

          QAction *m_findPrevious = editMenu->addAction(tr("&Find Previous"));
          m_findPrevious->setShortcuts(QKeySequence::FindPrevious);
          connect(m_findPrevious, SIGNAL(triggered()), this, SLOT(slotEditFindPrevious()));
          editMenu->addSeparator();

          editMenu->addAction(tr("&Preferences"), this, SLOT(slotPreferences()), tr("Ctrl+,"));

          // View
          QMenu *viewMenu = menuBar()->addMenu(tr("&View"));

          m_viewBookmarkBar = new QAction(this);
          updateBookmarksToolbarActionText(true);
          m_viewBookmarkBar->setShortcut(tr("Shift+Ctrl+B"));
          connect(m_viewBookmarkBar, SIGNAL(triggered()), this, SLOT(slotViewBookmarksBar()));
          viewMenu->addAction(m_viewBookmarkBar);

          m_viewToolbar = new QAction(this);
          updateToolbarActionText(true);
          m_viewToolbar->setShortcut(tr("Ctrl+|"));
          connect(m_viewToolbar, SIGNAL(triggered()), this, SLOT(slotViewToolbar()));
          viewMenu->addAction(m_viewToolbar);

          m_viewStatusbar = new QAction(this);
          updateStatusbarActionText(true);
          m_viewStatusbar->setShortcut(tr("Ctrl+/"));
          connect(m_viewStatusbar, SIGNAL(triggered()), this, SLOT(slotViewStatusbar()));
          viewMenu->addAction(m_viewStatusbar);

          viewMenu->addSeparator();

          m_stop = viewMenu->addAction(tr("&Stop"));
          QList<QKeySequence> shortcuts;
          shortcuts.append(QKeySequence(Qt::CTRL | Qt::Key_Period));
          shortcuts.append(Qt::Key_Escape);
          m_stop->setShortcuts(shortcuts);
          m_tabWidget->addWebAction(m_stop, QWebEnginePage::Stop);

          m_reload = viewMenu->addAction(tr("Reload Page"));
          m_reload->setShortcuts(QKeySequence::Refresh);
          m_tabWidget->addWebAction(m_reload, QWebEnginePage::Reload);

          viewMenu->addAction(tr("Zoom &In"), this, SLOT(slotViewZoomIn()), QKeySequence(Qt::CTRL | Qt::Key_Plus));
          viewMenu->addAction(tr("Zoom &Out"), this, SLOT(slotViewZoomOut()), QKeySequence(Qt::CTRL | Qt::Key_Minus));
          viewMenu->addAction(tr("Reset &Zoom"), this, SLOT(slotViewResetZoom()), QKeySequence(Qt::CTRL | Qt::Key_0));

          viewMenu->addSeparator();
          viewMenu->addAction(tr("Page S&ource"), this, SLOT(slotViewPageSource()), tr("Ctrl+Alt+U"));
          QAction *a = viewMenu->addAction(tr("&Full Screen"), this, SLOT(slotViewFullScreen(bool)),  Qt::Key_F11);
          a->setCheckable(true);

          // History
          HistoryMenu *historyMenu = new HistoryMenu(this);
          connect(historyMenu, SIGNAL(openUrl(QUrl)),
                  m_tabWidget, SLOT(loadUrlInCurrentTab(QUrl)));
          connect(historyMenu, SIGNAL(hovered(QString)), this,
                  SLOT(slotUpdateStatusbar(QString)));
          historyMenu->setTitle(tr("Hi&story"));
          menuBar()->addMenu(historyMenu);
          QList<QAction*> historyActions;

          m_historyBack = new QAction(tr("Back"), this);
          m_tabWidget->addWebAction(m_historyBack, QWebEnginePage::Back);
          QList<QKeySequence> backShortcuts = QKeySequence::keyBindings(QKeySequence::Back);
          for (auto it = backShortcuts.begin(); it != backShortcuts.end();) {
              // Chromium already handles navigate on backspace when appropriate.
              if ((*it)[0] == Qt::Key_Backspace)
                  it = backShortcuts.erase(it);
              else
                  ++it;
          }
          // For some reason Qt doesn't bind the dedicated Back key to Back.
          backShortcuts.append(QKeySequence(Qt::Key_Back));
          m_historyBack->setShortcuts(backShortcuts);
          m_historyBack->setIconVisibleInMenu(false);
          historyActions.append(m_historyBack);

          m_historyForward = new QAction(tr("Forward"), this);
          m_tabWidget->addWebAction(m_historyForward, QWebEnginePage::Forward);
          QList<QKeySequence> fwdShortcuts = QKeySequence::keyBindings(QKeySequence::Forward);
          for (auto it = fwdShortcuts.begin(); it != fwdShortcuts.end();) {
              if (((*it)[0] & Qt::Key_unknown) == Qt::Key_Backspace)
                  it = fwdShortcuts.erase(it);
              else
                  ++it;
          }
          fwdShortcuts.append(QKeySequence(Qt::Key_Forward));
          m_historyForward->setShortcuts(fwdShortcuts);
          m_historyForward->setIconVisibleInMenu(false);
          historyActions.append(m_historyForward);

          QAction *m_historyHome = new QAction(tr("Home"), this);
          connect(m_historyHome, SIGNAL(triggered()), this, SLOT(slotHome()));
          m_historyHome->setShortcut(QKeySequence(Qt::CTRL | Qt::SHIFT | Qt::Key_H));
          historyActions.append(m_historyHome);

      #if defined(QWEBENGINEHISTORY_RESTORESESSION)
          m_restoreLastSession = new QAction(tr("Restore Last Session"), this);
          connect(m_restoreLastSession, SIGNAL(triggered()), BrowserApplication::instance(), SLOT(restoreLastSession()));
          m_restoreLastSession->setEnabled(BrowserApplication::instance()->canRestoreSession());
          historyActions.append(m_tabWidget->recentlyClosedTabsAction());
          historyActions.append(m_restoreLastSession);
      #endif

          historyMenu->setInitialActions(historyActions);

          // Bookmarks
          BookmarksMenu *bookmarksMenu = new BookmarksMenu(this);
          connect(bookmarksMenu, SIGNAL(openUrl(QUrl)),
                  m_tabWidget, SLOT(loadUrlInCurrentTab(QUrl)));
          connect(bookmarksMenu, SIGNAL(hovered(QString)),
                  this, SLOT(slotUpdateStatusbar(QString)));
          bookmarksMenu->setTitle(tr("&Bookmarks"));
          menuBar()->addMenu(bookmarksMenu);

          QList<QAction*> bookmarksActions;

          QAction *showAllBookmarksAction = new QAction(tr("Show All Bookmarks"), this);
          connect(showAllBookmarksAction, SIGNAL(triggered()), this, SLOT(slotShowBookmarksDialog()));
          m_addBookmark = new QAction(QIcon(QLatin1String(":addbookmark.png")), tr("Add Bookmark..."), this);
          m_addBookmark->setIconVisibleInMenu(false);

          connect(m_addBookmark, SIGNAL(triggered()), this, SLOT(slotAddBookmark()));
          m_addBookmark->setShortcut(QKeySequence(Qt::CTRL | Qt::Key_D));

          bookmarksActions.append(showAllBookmarksAction);
          bookmarksActions.append(m_addBookmark);
          bookmarksMenu->setInitialActions(bookmarksActions);

          // Window
          m_windowMenu = menuBar()->addMenu(tr("&Window"));
          connect(m_windowMenu, SIGNAL(aboutToShow()),
                  this, SLOT(slotAboutToShowWindowMenu()));
          slotAboutToShowWindowMenu();

          QMenu *toolsMenu = menuBar()->addMenu(tr("&Tools"));
          toolsMenu->addAction(tr("Web &Search"), this, SLOT(slotWebSearch()), QKeySequence(tr("Ctrl+K", "Web Search")));
      #if defined(QWEBENGINEINSPECTOR)
          a = toolsMenu->addAction(tr("Enable Web &Inspector"), this, SLOT(slotToggleInspector(bool)));
          a->setCheckable(true);
      #endif

          QMenu *helpMenu = menuBar()->addMenu(tr("&Help"));
          helpMenu->addAction(tr("About &Qt"), qApp, SLOT(aboutQt()));
          helpMenu->addAction(tr("About &Demo Browser"), this, SLOT(slotAboutApplication()));
      }

      void BrowserMainWindow::setupToolBar()
      {
          m_navigationBar = addToolBar(tr("Navigation"));
          connect(m_navigationBar->toggleViewAction(), SIGNAL(toggled(bool)),
                  this, SLOT(updateToolbarActionText(bool)));

          m_historyBack->setIcon(style()->standardIcon(QStyle::SP_ArrowBack, 0, this));
          m_historyBackMenu = new QMenu(this);
          m_historyBack->setMenu(m_historyBackMenu);
          connect(m_historyBackMenu, SIGNAL(aboutToShow()),
                  this, SLOT(slotAboutToShowBackMenu()));
          connect(m_historyBackMenu, SIGNAL(triggered(QAction*)),
                  this, SLOT(slotOpenActionUrl(QAction*)));
          m_navigationBar->addAction(m_historyBack);

          m_historyForward->setIcon(style()->standardIcon(QStyle::SP_ArrowForward, 0, this));
          m_historyForwardMenu = new QMenu(this);
          connect(m_historyForwardMenu, SIGNAL(aboutToShow()),
                  this, SLOT(slotAboutToShowForwardMenu()));
          connect(m_historyForwardMenu, SIGNAL(triggered(QAction*)),
                  this, SLOT(slotOpenActionUrl(QAction*)));
          m_historyForward->setMenu(m_historyForwardMenu);
          m_navigationBar->addAction(m_historyForward);

          m_stopReload = new QAction(this);
          m_reloadIcon = style()->standardIcon(QStyle::SP_BrowserReload);
          m_stopReload->setIcon(m_reloadIcon);

          m_navigationBar->addAction(m_stopReload);

          m_navigationBar->addWidget(m_tabWidget->lineEditStack());

          m_toolbarSearch = new ToolbarSearch(m_navigationBar);
          m_navigationBar->addWidget(m_toolbarSearch);
          connect(m_toolbarSearch, SIGNAL(search(QUrl)), SLOT(loadUrl(QUrl)));

          m_chaseWidget = new ChaseWidget(this);
          m_navigationBar->addWidget(m_chaseWidget);
      }

      void BrowserMainWindow::slotShowBookmarksDialog()
      {
          BookmarksDialog *dialog = new BookmarksDialog(this);
          connect(dialog, SIGNAL(openUrl(QUrl)),
                  m_tabWidget, SLOT(loadUrlInCurrentTab(QUrl)));
          dialog->show();
      }

      void BrowserMainWindow::slotAddBookmark()
      {
          WebView *webView = currentTab();
          QString url = webView->url().toString();
          QString title = webView->title();
          AddBookmarkDialog dialog(url, title);
          dialog.exec();
      }

      void BrowserMainWindow::slotViewToolbar()
      {
          if (m_navigationBar->isVisible()) {
              updateToolbarActionText(false);
              m_navigationBar->close();
          } else {
              updateToolbarActionText(true);
              m_navigationBar->show();
          }
          m_autoSaver->changeOccurred();
      }

      void BrowserMainWindow::slotViewBookmarksBar()
      {
          if (m_bookmarksToolbar->isVisible()) {
              updateBookmarksToolbarActionText(false);
              m_bookmarksToolbar->close();
          } else {
              updateBookmarksToolbarActionText(true);
              m_bookmarksToolbar->show();
          }
          m_autoSaver->changeOccurred();
      }

      void BrowserMainWindow::updateStatusbarActionText(bool visible)
      {
          m_viewStatusbar->setText(!visible ? tr("Show Status Bar") : tr("Hide Status Bar"));
      }

      void BrowserMainWindow::handleFindTextResult(bool found)
      {
          if (!found)
              slotUpdateStatusbar(tr("\"%1\" not found.").arg(m_lastSearch));
      }

      void BrowserMainWindow::updateToolbarActionText(bool visible)
      {
          m_viewToolbar->setText(!visible ? tr("Show Toolbar") : tr("Hide Toolbar"));
      }

      void BrowserMainWindow::updateBookmarksToolbarActionText(bool visible)
      {
          m_viewBookmarkBar->setText(!visible ? tr("Show Bookmarks bar") : tr("Hide Bookmarks bar"));
      }

      void BrowserMainWindow::slotViewStatusbar()
      {
          if (statusBar()->isVisible()) {
              updateStatusbarActionText(false);
              statusBar()->close();
          } else {
              updateStatusbarActionText(true);
              statusBar()->show();
          }
          m_autoSaver->changeOccurred();
      }

      void BrowserMainWindow::loadUrl(const QUrl &url)
      {
          if (!currentTab() || !url.isValid())
              return;

          m_tabWidget->currentLineEdit()->setText(QString::fromUtf8(url.toEncoded()));
          m_tabWidget->loadUrlInCurrentTab(url);
      }

      void BrowserMainWindow::slotDownloadManager()
      {
          BrowserApplication::downloadManager()->show();
      }

      void BrowserMainWindow::slotSelectLineEdit()
      {
          m_tabWidget->currentLineEdit()->selectAll();
          m_tabWidget->currentLineEdit()->setFocus();
      }

      void BrowserMainWindow::slotFileSaveAs()
      {
          // not implemented yet.
      }

      void BrowserMainWindow::slotPreferences()
      {
          SettingsDialog *s = new SettingsDialog(this);
          s->show();
      }

      void BrowserMainWindow::slotUpdateStatusbar(const QString &string)
      {
          statusBar()->showMessage(string, 2000);
      }

      void BrowserMainWindow::slotUpdateWindowTitle(const QString &title)
      {
          if (title.isEmpty()) {
              setWindowTitle(tr("Qt Demo Browser"));
          } else {
      #if defined(Q_OS_OSX)
              setWindowTitle(title);
      #else
              setWindowTitle(tr("%1 - Qt Demo Browser", "Page title and Browser name").arg(title));
      #endif
          }
      }

      void BrowserMainWindow::slotAboutApplication()
      {
          QMessageBox::about(this, tr("About"), tr(
              "Version %1"
              "<p>This demo demonstrates the facilities "
              "of Qt WebEngine in action, providing an example "
              "browser for you to experiment with.<p>"
              "<p>Qt WebEngine is based on the Chromium open source project "
              "developed at <a href=\"http://www.chromium.org/\">http://www.chromium.org/</a>."
              ).arg(QCoreApplication::applicationVersion()));
      }

      void BrowserMainWindow::slotFileNew()
      {
          BrowserApplication::instance()->newMainWindow();
          BrowserMainWindow *mw = BrowserApplication::instance()->mainWindow();
          mw->slotHome();
      }

      void BrowserMainWindow::slotFileOpen()
      {
          QString file = QFileDialog::getOpenFileName(this, tr("Open Web Resource"), QString(),
                  tr("Web Resources (*.html *.htm *.svg *.png *.gif *.svgz);;All files (*.*)"));

          if (file.isEmpty())
              return;

          loadPage(file);
      }

      void BrowserMainWindow::slotFilePrintPreview()
      {
      #ifndef QT_NO_PRINTPREVIEWDIALOG
          if (!currentTab())
              return;
          QPrintPreviewDialog *dialog = new QPrintPreviewDialog(this);
          connect(dialog, SIGNAL(paintRequested(QPrinter*)),
                  currentTab(), SLOT(print(QPrinter*)));
          dialog->exec();
      #endif
      }

      void BrowserMainWindow::slotFilePrint()
      {
      #if defined(QWEBENGINEPAGE_PRINT)
          if (!currentTab())
              return;
          printRequested(currentTab()->page()->mainFrame());
      #endif
      }

      #if defined(QWEBENGINEPAGE_PRINT)
      void BrowserMainWindow::printRequested(QWebEngineFrame *frame)
      {
      #ifndef QT_NO_PRINTDIALOG
          QPrinter printer;
          QPrintDialog *dialog = new QPrintDialog(&printer, this);
          dialog->setWindowTitle(tr("Print Document"));
          if (dialog->exec() != QDialog::Accepted)
              return;
          frame->print(&printer);
      #endif
      }
      #endif

      void BrowserMainWindow::slotPrivateBrowsing()
      {
          if (!BrowserApplication::instance()->privateBrowsing()) {
              QString title = tr("Are you sure you want to turn on private browsing?");
              QString text = tr("<b>%1</b><br><br>"
                  "This action will reload all open tabs.<br>"
                  "When private browsing in turned on,"
                  " webpages are not added to the history,"
                  " items are automatically removed from the Downloads window," \
                  " new cookies are not stored, current cookies can't be accessed," \
                  " site icons wont be stored, session wont be saved, " \
                  " and searches are not added to the pop-up menu in the Google search box." \
                  "  Until you close the window, you can still click the Back and Forward buttons" \
                  " to return to the webpages you have opened.").arg(title);

              QMessageBox::StandardButton button = QMessageBox::question(this, QString(), text,
                                     QMessageBox::Ok | QMessageBox::Cancel,
                                     QMessageBox::Ok);

              if (button == QMessageBox::Ok)
                  BrowserApplication::instance()->setPrivateBrowsing(true);
          } else {
              // TODO: Also ask here
              BrowserApplication::instance()->setPrivateBrowsing(false);
          }
      }

      void BrowserMainWindow::closeEvent(QCloseEvent *event)
      {
          if (m_tabWidget->count() > 1) {
              int ret = QMessageBox::warning(this, QString(),
                                 tr("Are you sure you want to close the window?"
                                    "  There are %1 tabs open").arg(m_tabWidget->count()),
                                 QMessageBox::Yes | QMessageBox::No,
                                 QMessageBox::No);
              if (ret == QMessageBox::No) {
                  event->ignore();
                  return;
              }
          }
          event->accept();
          deleteLater();
      }

      void BrowserMainWindow::slotEditFind()
      {
          if (!currentTab())
              return;
          bool ok;
          QString search = QInputDialog::getText(this, tr("Find"),
                                                tr("Text:"), QLineEdit::Normal,
                                                m_lastSearch, &ok);
          if (ok && !search.isEmpty()) {
              m_lastSearch = search;
              currentTab()->findText(m_lastSearch, 0, invoke(this, &BrowserMainWindow::handleFindTextResult));
          }
      }

      void BrowserMainWindow::slotEditFindNext()
      {
          if (!currentTab() && !m_lastSearch.isEmpty())
              return;
          currentTab()->findText(m_lastSearch);
      }

      void BrowserMainWindow::slotEditFindPrevious()
      {
          if (!currentTab() && !m_lastSearch.isEmpty())
              return;
          currentTab()->findText(m_lastSearch, QWebEnginePage::FindBackward);
      }

      void BrowserMainWindow::slotViewZoomIn()
      {
          if (!currentTab())
              return;
          currentTab()->setZoomFactor(currentTab()->zoomFactor() + 0.1);
      }

      void BrowserMainWindow::slotViewZoomOut()
      {
          if (!currentTab())
              return;
          currentTab()->setZoomFactor(currentTab()->zoomFactor() - 0.1);
      }

      void BrowserMainWindow::slotViewResetZoom()
      {
          if (!currentTab())
              return;
          currentTab()->setZoomFactor(1.0);
      }

      void BrowserMainWindow::slotViewFullScreen(bool makeFullScreen)
      {
          if (makeFullScreen) {
              showFullScreen();
          } else {
              if (isMinimized())
                  showMinimized();
              else if (isMaximized())
                  showMaximized();
              else showNormal();
          }
      }

      void BrowserMainWindow::slotViewPageSource()
      {
          if (!currentTab())
              return;

          QPlainTextEdit *view = new QPlainTextEdit;
          view->setWindowTitle(tr("Page Source of %1").arg(currentTab()->title()));
          view->setMinimumWidth(640);
          view->setAttribute(Qt::WA_DeleteOnClose);
          view->show();

          currentTab()->page()->toHtml(invoke(view, &QPlainTextEdit::setPlainText));
      }

      void BrowserMainWindow::slotHome()
      {
          QSettings settings;
          settings.beginGroup(QLatin1String("MainWindow"));
          QString home = settings.value(QLatin1String("home"), QLatin1String(defaultHome)).toString();
          loadPage(home);
      }

      void BrowserMainWindow::slotWebSearch()
      {
          m_toolbarSearch->lineEdit()->selectAll();
          m_toolbarSearch->lineEdit()->setFocus();
      }

      void BrowserMainWindow::slotToggleInspector(bool enable)
      {
      #if defined(QWEBENGINEINSPECTOR)
          QWebEngineSettings::globalSettings()->setAttribute(QWebEngineSettings::DeveloperExtrasEnabled, enable);
          if (enable) {
              int result = QMessageBox::question(this, tr("Web Inspector"),
                                                 tr("The web inspector will only work correctly for pages that were loaded after enabling.\n"
                                                 "Do you want to reload all pages?"),
                                                 QMessageBox::Yes | QMessageBox::No);
              if (result == QMessageBox::Yes) {
                  m_tabWidget->reloadAllTabs();
              }
          }
      #else
          Q_UNUSED(enable);
      #endif
      }

      void BrowserMainWindow::slotSwapFocus()
      {
          if (currentTab()->hasFocus())
              m_tabWidget->currentLineEdit()->setFocus();
          else
              currentTab()->setFocus();
      }

      void BrowserMainWindow::loadPage(const QString &page)
      {
          QUrl url = QUrl::fromUserInput(page);
          loadUrl(url);
      }

      TabWidget *BrowserMainWindow::tabWidget() const
      {
          return m_tabWidget;
      }

      WebView *BrowserMainWindow::currentTab() const
      {
          return m_tabWidget->currentWebView();
      }

      void BrowserMainWindow::slotLoadProgress(int progress)
      {
          if (progress < 100 && progress > 0) {
              m_chaseWidget->setAnimated(true);
              disconnect(m_stopReload, SIGNAL(triggered()), m_reload, SLOT(trigger()));
              if (m_stopIcon.isNull())
                  m_stopIcon = style()->standardIcon(QStyle::SP_BrowserStop);
              m_stopReload->setIcon(m_stopIcon);
              connect(m_stopReload, SIGNAL(triggered()), m_stop, SLOT(trigger()));
              m_stopReload->setToolTip(tr("Stop loading the current page"));
          } else {
              m_chaseWidget->setAnimated(false);
              disconnect(m_stopReload, SIGNAL(triggered()), m_stop, SLOT(trigger()));
              m_stopReload->setIcon(m_reloadIcon);
              connect(m_stopReload, SIGNAL(triggered()), m_reload, SLOT(trigger()));
              m_stopReload->setToolTip(tr("Reload the current page"));
          }
      }

      void BrowserMainWindow::slotAboutToShowBackMenu()
      {
          m_historyBackMenu->clear();
          if (!currentTab())
              return;
          QWebEngineHistory *history = currentTab()->history();
          int historyCount = history->count();
          for (int i = history->backItems(historyCount).count() - 1; i >= 0; --i) {
              QWebEngineHistoryItem item = history->backItems(history->count()).at(i);
              QAction *action = new QAction(this);
              action->setData(-1*(historyCount-i-1));
              QIcon icon = BrowserApplication::instance()->icon(item.url());
              action->setIcon(icon);
              action->setText(item.title());
              m_historyBackMenu->addAction(action);
          }
      }

      void BrowserMainWindow::slotAboutToShowForwardMenu()
      {
          m_historyForwardMenu->clear();
          if (!currentTab())
              return;
          QWebEngineHistory *history = currentTab()->history();
          int historyCount = history->count();
          for (int i = 0; i < history->forwardItems(history->count()).count(); ++i) {
              QWebEngineHistoryItem item = history->forwardItems(historyCount).at(i);
              QAction *action = new QAction(this);
              action->setData(historyCount-i);
              QIcon icon = BrowserApplication::instance()->icon(item.url());
              action->setIcon(icon);
              action->setText(item.title());
              m_historyForwardMenu->addAction(action);
          }
      }

      void BrowserMainWindow::slotAboutToShowWindowMenu()
      {
          m_windowMenu->clear();
          m_windowMenu->addAction(m_tabWidget->nextTabAction());
          m_windowMenu->addAction(m_tabWidget->previousTabAction());
          m_windowMenu->addSeparator();
          m_windowMenu->addAction(tr("Downloads"), this, SLOT(slotDownloadManager()), QKeySequence(tr("Alt+Ctrl+L", "Download Manager")));
          m_windowMenu->addSeparator();

          QList<BrowserMainWindow*> windows = BrowserApplication::instance()->mainWindows();
          for (int i = 0; i < windows.count(); ++i) {
              BrowserMainWindow *window = windows.at(i);
              QAction *action = m_windowMenu->addAction(window->windowTitle(), this, SLOT(slotShowWindow()));
              action->setData(i);
              action->setCheckable(true);
              if (window == this)
                  action->setChecked(true);
          }
      }

      void BrowserMainWindow::slotShowWindow()
      {
          if (QAction *action = qobject_cast<QAction*>(sender())) {
              QVariant v = action->data();
              if (v.canConvert<int>()) {
                  int offset = qvariant_cast<int>(v);
                  QList<BrowserMainWindow*> windows = BrowserApplication::instance()->mainWindows();
                  windows.at(offset)->activateWindow();
                  windows.at(offset)->currentTab()->setFocus();
              }
          }
      }

      void BrowserMainWindow::slotOpenActionUrl(QAction *action)
      {
          int offset = action->data().toInt();
          QWebEngineHistory *history = currentTab()->history();
          if (offset < 0)
              history->goToItem(history->backItems(-1*offset).first()); // back
          else if (offset > 0)
              history->goToItem(history->forwardItems(history->count() - offset + 1).back()); // forward
      }

      void BrowserMainWindow::geometryChangeRequested(const QRect &geometry)
      {
          setGeometry(geometry);
      }