#include <QtGui/qabstractslider.h>
#ifndef QABSTRACTSLIDER_H
class QAbstractSlider: public QWidget{
   /* Some contents are skipped to improve readability */
   public: enum SliderAction{
      /* ... */
      SliderSingleStepAdd = 1,
      /* ... */
   };
   /* ... */
};
#endif // QABSTRACTSLIDER_H