Qt 5.11 | Qt WebEngine | WebEngine Widgets Simple Browser Example | webpage.cpp Example File

Qt 5.11.3 Reference Documentation

# webpage.cpp Example File

webenginewidgets/simplebrowser/webpage.cpp

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      #include "browserwindow.h"
      #include "tabwidget.h"
      #include "ui_certificateerrordialog.h"
      #include "ui_passworddialog.h"
      #include "webpage.h"
      #include "webview.h"
      #include <QAuthenticator>
      #include <QMessageBox>
      #include <QStyle>

      WebPage::WebPage(QWebEngineProfile *profile, QObject *parent)
          : QWebEnginePage(profile, parent)
      {
          connect(this, &QWebEnginePage::authenticationRequired, this, &WebPage::handleAuthenticationRequired);
          connect(this, &QWebEnginePage::proxyAuthenticationRequired, this, &WebPage::handleProxyAuthenticationRequired);
          connect(this, &QWebEnginePage::registerProtocolHandlerRequested, this, &WebPage::handleRegisterProtocolHandlerRequested);
      }

      bool WebPage::certificateError(const QWebEngineCertificateError &error)
      {
          QWidget *mainWindow = view()->window();
          if (error.isOverridable()) {
              QDialog dialog(mainWindow);
              dialog.setModal(true);
              dialog.setWindowFlags(dialog.windowFlags() & ~Qt::WindowContextHelpButtonHint);
              Ui::CertificateErrorDialog certificateDialog;
              certificateDialog.setupUi(&dialog);
              certificateDialog.m_iconLabel->setText(QString());
              QIcon icon(mainWindow->style()->standardIcon(QStyle::SP_MessageBoxWarning, 0, mainWindow));
              certificateDialog.m_iconLabel->setPixmap(icon.pixmap(32, 32));
              certificateDialog.m_errorLabel->setText(error.errorDescription());
              dialog.setWindowTitle(tr("Certificate Error"));
              return dialog.exec() == QDialog::Accepted;
          }

          QMessageBox::critical(mainWindow, tr("Certificate Error"), error.errorDescription());
          return false;
      }

      void WebPage::handleAuthenticationRequired(const QUrl &requestUrl, QAuthenticator *auth)
      {
          QWidget *mainWindow = view()->window();
          QDialog dialog(mainWindow);
          dialog.setModal(true);
          dialog.setWindowFlags(dialog.windowFlags() & ~Qt::WindowContextHelpButtonHint);

          Ui::PasswordDialog passwordDialog;
          passwordDialog.setupUi(&dialog);

          passwordDialog.m_iconLabel->setText(QString());
          QIcon icon(mainWindow->style()->standardIcon(QStyle::SP_MessageBoxQuestion, 0, mainWindow));
          passwordDialog.m_iconLabel->setPixmap(icon.pixmap(32, 32));

          QString introMessage(tr("Enter username and password for \"%1\" at %2")
                               .arg(auth->realm()).arg(requestUrl.toString().toHtmlEscaped()));
          passwordDialog.m_infoLabel->setText(introMessage);
          passwordDialog.m_infoLabel->setWordWrap(true);

          if (dialog.exec() == QDialog::Accepted) {
              auth->setUser(passwordDialog.m_userNameLineEdit->text());
              auth->setPassword(passwordDialog.m_passwordLineEdit->text());
          } else {
              // Set authenticator null if dialog is cancelled
              *auth = QAuthenticator();
          }
      }

      void WebPage::handleProxyAuthenticationRequired(const QUrl &, QAuthenticator *auth, const QString &proxyHost)
      {
          QWidget *mainWindow = view()->window();
          QDialog dialog(mainWindow);
          dialog.setModal(true);
          dialog.setWindowFlags(dialog.windowFlags() & ~Qt::WindowContextHelpButtonHint);

          Ui::PasswordDialog passwordDialog;
          passwordDialog.setupUi(&dialog);

          passwordDialog.m_iconLabel->setText(QString());
          QIcon icon(mainWindow->style()->standardIcon(QStyle::SP_MessageBoxQuestion, 0, mainWindow));
          passwordDialog.m_iconLabel->setPixmap(icon.pixmap(32, 32));

          QString introMessage = tr("Connect to proxy \"%1\" using:");
          introMessage = introMessage.arg(proxyHost.toHtmlEscaped());
          passwordDialog.m_infoLabel->setText(introMessage);
          passwordDialog.m_infoLabel->setWordWrap(true);

          if (dialog.exec() == QDialog::Accepted) {
              auth->setUser(passwordDialog.m_userNameLineEdit->text());
              auth->setPassword(passwordDialog.m_passwordLineEdit->text());
          } else {
              // Set authenticator null if dialog is cancelled
              *auth = QAuthenticator();
          }
      }

      void WebPage::handleRegisterProtocolHandlerRequested(QWebEngineRegisterProtocolHandlerRequest request)
      {
          auto answer = QMessageBox::question(
              view()->window(),
              tr("Permission Request"),
              tr("Allow %1 to open all %2 links?")
              .arg(request.origin().host())
              .arg(request.scheme()));
          if (answer == QMessageBox::Yes)
              request.accept();
          else
              request.reject();
      }