Open files from system request on Mac [Qt]

Opening files using system events in Qt

#include <QEvent>
#include <QApplication>

// Create a subclass of QApplication so that we can customize what we
// do when the operating system sends us an event (such as opening a file)
class MyApp : public QApplication 
{
  
  Q_OBJECT
  
  protected:
  
    bool event (QEvent *event) 
    {
      // The system requested us to open a file
      if (event->type() == QEvent::FileOpen) 
      {
        // Get the path of the file that we want to open
        QString _file_path = static_cast<QFileOpenEvent *> (event)->file();
        
        // Now type the code to open the file in your window here...
      }
        
      // The system requested us to do another thing, so we just follow the rules
      else
        return QApplication::event (event);

      return true;
    }
};