Mercurial > cpython-lru_cache-weakref

annotate Lib/stdwin/Histogram.py @ 5817:48b94de85bf3 legacy-trunk

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Extensive changes by AMK.
author Guido van Rossum <guido@python.org>
date Thu, 17 Jul 1997 16:29:42 +0000
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1 # Module 'Histogram'
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2
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3 from Buttons import *
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4
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5 # A Histogram displays a histogram of numeric data.
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6 #
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7 class HistogramAppearance(LabelAppearance, Define):
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8 #
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9 def define(self, parent):
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10 Define.define(self, (parent, ''))
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11 self.ydata = []
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12 self.scale = (0, 100)
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13 return self
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14 #
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15 def setdata(self, ydata, scale):
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16 self.ydata = ydata
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17 self.scale = scale # (min, max)
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18 self.parent.change(self.bounds)
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19 #
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20 def drawpict(self, d):
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21 (left, top), (right, bottom) = self.bounds
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22 min, max = self.scale
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23 size = max-min
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24 width, height = right-left, bottom-top
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25 ydata = self.ydata
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26 npoints = len(ydata)
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27 v1 = top + height # constant
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28 h1 = left # changed in loop
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29 for i in range(npoints):
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30 h0 = h1
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31 v0 = top + height - (ydata[i]-min)*height/size
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32 h1 = left + (i+1) * width/npoints
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33 d.paint((h0, v0), (h1, v1))
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34 #
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35
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36 class Histogram(NoReactivity, HistogramAppearance): pass