def _adjust_scale(attributes, points, max_width, diff, attr_inds,
log_reg_cont_data_extremes, cls_index):
if not diff:
return max_width
def offset(name, point):
text_ = QGraphicsTextItem(name).boundingRect()
return scale * point + text_.width() / 2
lr = log_reg_cont_data_extremes
scale = max_width / diff
names = list(chain.from_iterable(
[_get_labels(a, lr and lr[i] and lr[i][0] and lr[i][cls_index],
OWNomogram.get_ruler_values(p.min(), p.max(),
scale * p.ptp(), False))
for i, a, p in zip(attr_inds, attributes, points)]))
points = list(chain.from_iterable(points))
old_scale = scale + 1
while old_scale > scale:
old_scale = scale
offsets = [offset(n, p) for n, p in zip(names, points)]
most_right_name = names[np.argmax(offsets)]
text = QGraphicsTextItem(most_right_name).boundingRect()
scale = (max_width - text.width() / 2) / diff
return scale
def offset(name, point):
text_ = QGraphicsTextItem(name).boundingRect()
return scale * point + text_.width() / 2