void TimeSliderAction::setPos(int v) {
	QList<QWidget *> l = createdWidgets();
	for (int n=0; n < l.count(); n++) {
		TimeSlider *s = (TimeSlider*) l[n];
		bool was_blocked= s->blockSignals(true);
		s->setPos(v);
		s->blockSignals(was_blocked);
	}
}