void TableWidget::updateGeometries()
{
	QTableView::updateGeometries();

	int width = 0;
	if(!verticalHeader()->isHidden())
	{
		width = qMax(verticalHeader()->minimumWidth(), verticalHeader()->sizeHint().width());
		width = qMin(width, verticalHeader()->maximumWidth());
	}
	int height = 0;
	if(!horizontalHeader()->isHidden())
	{
		height = qMax(horizontalHeader()->minimumHeight(), horizontalHeader()->sizeHint().height());
		height = qMin(height, horizontalHeader()->maximumHeight());
	}
	// update headers
	QRect vg = viewport()->geometry();
	int verticalLeft = isRightToLeft() ? vg.right() + 1 : (vg.left() - width);
	int horizontalTop = vg.top() - height;
	cornerButton->setGeometry(verticalLeft, horizontalTop, width, height);
}