#include <QtGui/qabstractslider.h>
#ifndef QABSTRACTSLIDER_H
class QAbstractSlider: public QWidget{
   /* Some contents are skipped to improve readability */
   protected: enum SliderChange{
      SliderRangeChange = 0,
      SliderOrientationChange = 1,
      SliderStepsChange = 2,
      SliderValueChange = 3,
   };
   /* ... */
};
#endif // QABSTRACTSLIDER_H