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# Module 'Histogram'
from Buttons import *
# A Histogram displays a histogram of numeric data.
#
class HistogramAppearance(LabelAppearance, Define):
#
def define(self, parent):
Define.define(self, (parent, ''))
self.ydata = []
self.scale = (0, 100)
return self
#
def setdata(self, ydata, scale):
self.ydata = ydata
self.scale = scale # (min, max)
self.parent.change(self.bounds)
#
def drawpict(self, d):
(left, top), (right, bottom) = self.bounds
min, max = self.scale
size = max-min
width, height = right-left, bottom-top
ydata = self.ydata
npoints = len(ydata)
v1 = top + height # constant
h1 = left # changed in loop
for i in range(npoints):
h0 = h1
v0 = top + height - (ydata[i]-min)*height/size
h1 = left + (i+1) * width/npoints
d.paint((h0, v0), (h1, v1))
#
class Histogram(NoReactivity, HistogramAppearance): pass
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