if (pos_vdivs_ > 0) {
p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
for (int i = 1; i <= pos_vdivs_; i++) {
const float dy = i * div_height_;
p.drawLine(QLineF(left, y - dy, right, y - dy));
}
if (pos_vdivs_ > 0) {
p.setPen(QPen(GridMajorColor, 1, Qt::DashLine));
for (int i = 1; i <= pos_vdivs_; i++) {
const float dy = i * div_height_;
p.drawLine(QLineF(left, y - dy, right, y - dy));
}