def _set_ranges(self):
rmin = self.min
ranges = []
while rmin < self.max:
rmax = self._exp_range(rmin, range_scale_factor)
ranges.append(Range(rmin, rmax))
rmin = rmax
# sometimes the last range might be smaller than the next to the last range
# fix that if it happens
(penultimate, ultimate) = ranges[-2:]
if ultimate.span < penultimate.span:
# create a new range to span both ranges
merged_range = Range(penultimate.min, ultimate.max)
# remove the last two ranges
ranges = ranges[:-2]
# and replace them with the merged range
ranges.append(merged_range)
for r in ranges:
self.add_item(r.id, r)
def setUp(self):
self.r = Range(0, 1)
