//m_overView->scale(m_overView->width() / trackView->duration(), m_overView->height() / (50 * trackView->tracksNumber()));
//m_overView->fitInView(m_overView->itemAt(0, 50), Qt::KeepAspectRatio);
//m_overView->scale(m_overView->width() / trackView->duration(), m_overView->height() / (50 * trackView->tracksNumber()));
//m_overView->fitInView(m_overView->itemAt(0, 50), Qt::KeepAspectRatio);