mainwindow.cpp Example File

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  #include "mainwindow.h"

  #include <QWebEngineView>
  #include <QWebEngineSettings>
  #include <QWebEngineFullScreenRequest>

  MainWindow::MainWindow(QWidget *parent)
      : QMainWindow(parent)
      , m_view(new QWebEngineView(this))
  {
      setCentralWidget(m_view);
      m_view->settings()->setAttribute(QWebEngineSettings::FullScreenSupportEnabled, true);
      connect(m_view->page(),
              &QWebEnginePage::fullScreenRequested,
              this,
              &MainWindow::fullScreenRequested);
      m_view->load(QUrl(QStringLiteral("qrc:/index.html")));
  }

  void MainWindow::fullScreenRequested(QWebEngineFullScreenRequest request)
  {
      if (request.toggleOn()) {
          if (m_fullScreenWindow)
              return;
          request.accept();
          m_fullScreenWindow.reset(new FullScreenWindow(m_view));
      } else {
          if (!m_fullScreenWindow)
              return;
          request.accept();
          m_fullScreenWindow.reset();
      }
  }