void QProgressBar::setValue(int value)
{
    Q_D(QProgressBar);
    if (d->value == value || ((value > d->maximum || value < d->minimum)
                && (d->maximum != 0 || d->minimum != 0)))
        return;
    d->value = value;
    emit valueChanged(value);
#ifndef QT_NO_ACCESSIBILITY
    QAccessible::updateAccessibility(this, 0, QAccessible::ValueChanged);
#endif
    if (d->repaintRequired())
        repaint();
}