def axis_arrow(self, label, x0, x1, arrow_size):
path = arrow(x0, x1, arrow_size)
if not path:
return QPainterPath()
plan = self.plan
font = QFont(plan.font())
font.setPointSize(14)
metr = QFontMetrics(font)
rect = metr.boundingRect(label)
rect.setHeight(metr.xHeight())
tran = self.deviceTransform(self.plan.viewportTransform()).inverted()[0]
size = tran.mapRect(QRectF(rect)).size()
w, h = size.width(), size.height()
dir_ = (x1 - x0) / np.linalg.norm(x1 - x0)
offs = [-w/2, +h/2] + dir_ * max(w, h)
path.addText(QPointF(*(x1 + offs)), font, label)
return path
def axis_arrow(self, label, x0, x1, arrow_size):
path = arrow(x0, x1, arrow_size)
if not path:
return QPainterPath()
plan = self.plan
font = QFont(plan.font())
font.setPointSize(14)
metr = QFontMetrics(font)
rect = metr.boundingRect(label)
rect.setHeight(metr.xHeight())
tran = self.deviceTransform(
self.plan.viewportTransform()).inverted()[0]
size = tran.mapRect(QRectF(rect)).size()
w, h = size.width(), size.height()
dir_ = (x1 - x0) / np.linalg.norm(x1 - x0)
offs = [-w / 2, +h / 2] + dir_ * max(w, h)
path.addText(QPointF(*(x1 + offs)), font, label)
return path
