def _set_reference_point(self, pt):
'''
assumes no rotation of the reference frames
only scale and translate
'''
rp = ReferencePoint(pt)
info = rp.edit_traits()
if info.result:
plot = self.plot
self.points.append(((rp.x, rp.y), pt))
# if not self.reference_pt1:
# self.reference_pt1 = (rp.x, rp.y), pt
# else:
# # calculate bounds
# dp1, sp1 = self.reference_pt1
# dp2, sp2 = (rp.x, rp.y), pt
#
#
# w = plot.width
# h = plot.height
# if sp1[0] < sp2[0]:
# sx1, sx2 = sp1[0], sp2[0]
# x1, x2 = dp1[0], dp2[0]
# else:
# sx2, sx1 = sp1[0], sp2[0]
# x2, x1 = dp1[0], dp2[0]
#
# if sp1[1] < sp2[1]:
# sy1, sy2 = sp1[1], sp2[1]
# y1, y2 = dp1[1], dp2[1]
# else:
# sy2, sy1 = sp1[1], sp2[1]
# y2, y1 = dp1[1], dp2[1]
#
# pxperunit = abs((sx2 - sx1) / (x2 - x1))
#
# li = x1 - sx1 / pxperunit
# hi = x2 + (w - sx2) / pxperunit
# lv = y1 - sy1 / pxperunit
# hv = y2 + (h - sy2) / pxperunit
#
# plot.index_range.low_setting = li
# plot.index_range.high_setting = hi
# plot.value_range.low_setting = lv
# plot.value_range.high_setting = hv
#
plot.request_redraw()
def _get_point(self, sp):
rp = ReferencePoint(sp)
info = rp.edit_traits()
if info.result:
refp = rp.x, rp.y
return refp, sp
