#include <QtGui/qslider.h>
#ifndef QSLIDER_H
#ifndef QT_NO_SLIDER
class QSlider: public QAbstractSlider{
   /* Some contents are skipped to improve readability */
   protected: virtual void paintEvent(struct QPaintEvent* ev);
   /* ... */
};
#endif // QT_NO_SLIDER
#endif // QSLIDER_H