def test_reversed(self):
ary = array([5.0, 6.0, 7.0, 8.0, 9.0, 10.0])
ds = ArrayDataSource(ary)
r = DataRange1D(ds)
mapper = LinearMapper(range=r, low_pos=100, high_pos=0)
result = mapper.map_screen(ary)
assert_equal(result , array([100, 80, 60, 40, 20, 0]))
return
def test_reverse_construction(self):
mapper = LinearMapper()
r = DataRange1D()
ds = ArrayDataSource()
ary = array([1,2,3,4,5,6,7])
mapper.range = r
mapper.low_pos = 1.0
mapper.high_pos = 7.0
r.add(ds)
ds.set_data(ary)
self.assert_(r.low == 1)
self.assert_(r.high == 7)
screen_pts = mapper.map_screen(array([1,3,7]))
self.assert_(tuple(screen_pts) == (1.0, 3.0, 7.0))
return
