fullscreenwindow.h Example File

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  #ifndef FULLSCREENWINDOW_H
  #define FULLSCREENWINDOW_H

  #include <QWidget>

  class QWebEngineView;

  class FullScreenNotification;

  class FullScreenWindow : public QWidget
  {
      Q_OBJECT
  public:
      explicit FullScreenWindow(QWebEngineView *oldView, QWidget *parent = nullptr);
      ~FullScreenWindow();

  protected:
      void resizeEvent(QResizeEvent *event) override;

  private:
      QWebEngineView *m_view;
      FullScreenNotification *m_notification;
      QWebEngineView *m_oldView;
      QRect m_oldGeometry;
  };

  #endif // FULLSCREENWINDOW_H