if (points[p] == m_movepoint && (m_activeIndexPlot == -1 || m_activeIndexPlot == i)) {
QPoint delta = event->pos() - m_oldmousepoint;
double newy = m_movepoint->y() - delta.y() * dataRect().height() / pixRect().height();
if (points[p] == m_movepoint && (m_activeIndexPlot == -1 || m_activeIndexPlot == i)) {
QPoint delta = event->pos() - m_oldmousepoint;
double newy = m_movepoint->y() - delta.y() * dataRect().height() / pixRect().height();