1137     QScrollBar *const bars[2] = { d->hbar, d->vbar };

  1137     if (static_cast<QWheelEvent*>(e)->orientation() == Qt::Horizontal)

  1138     int idx = (e->orientation() == Qt::Vertical) ? 1 : 0;

  1138         QApplication::sendEvent(d->hbar, e);

  1139     int other = (idx + 1) % 2;

  1139     else

  1140     if (!bars[idx]->isVisible() && bars[other]->isVisible())

  1140         QApplication::sendEvent(d->vbar, e);

  1141         idx = other;   // If the scrollbar of the event orientation is hidden, fallback to the other.

  1142 

  1143     QApplication::sendEvent(bars[idx], e);