I want axis labels for a plot I\'m making, and naturally the y-axis label should be oriented vertically. I\'m pretty sure QwtPlot does this, but I\'m trying to
QwtPlot
There is no handy function in QLabel to do what you want, no. So:
QLabel
Use QGraphicsView, which allows you to transform items however you want.
QGraphicsView
Use QPainter. Probably the easiest approach would be to draw the text rotated into a QPixmap, then set it on your QLabel.
QPainter
QPixmap