how to scroll tablewidget from outside placed scrollbar

[chemstar]

connect(verticalScrollBar, SIGNAL(valueChanged(int)), this, SLOT(scrollVerticaly(int)));
connect(horizontalScrollBar, SIGNAL(valueChanged(int)), this, SLOT(scrollHorizontaly(int)));

void CMatrixWidget::scrollVerticaly(int value)
{
table3->verticalScrollBar()->setSliderPosition(value);
table1->verticalScrollBar()->setSliderPosition(value);
}

void CMatrixWidget::scrollHorizontaly(int value)
{
table2->horizontalScrollBar()->setSliderPosition(value);
}