Q_ENUMS example makes use of Q_ENUM

  class MyClass : public QObject
  {
      Q_OBJECT

  public:
      MyClass(QObject *parent = 0);
      ~MyClass();

      enum Priority { High, Low, VeryHigh, VeryLow };
      Q_ENUM(Priority)
      void setPriority(Priority priority);
      Priority priority() const;
  };