2017-03-08 10:09:39 +00:00
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from svg.charts import pie
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import math
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from lxml import etree
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def createPie(data, gaps = 0):
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total = sum(data.values())
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colours = ['#268ED7','#6A4F8D', '#A03D4F','#DC7432','#F6DC3B','#76B33B', '#267B60']
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2017-03-11 10:49:47 +00:00
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className = "hoverTitles" if len(data) > 9 else ""
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svg = '<svg viewBox="-115 -115 230 230" xmlns="http://www.w3.org/2000/svg" class="%s">' % className
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2017-03-08 10:09:39 +00:00
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numbers = ""
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position = 90
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i = 0
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for e in sorted(data.keys()):
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data[e] = data[e] / total
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arc = data[e] * 360.;
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diff = polarToCartesian(0,0,5, position+0.5*arc) if gaps > 0 else {'x':0, 'y': 0}
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d = describeArc(float(diff['x']), float(diff['y']), 60, position, position+arc)
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# print(position, arc)
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svg += '<path fill="none" stroke="%s" stroke-width="60" d="%s" />' % (colours[i%len(colours)], d)
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2017-03-11 10:49:47 +00:00
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# tRadius = 105 if i%2 else 95
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2017-03-08 10:09:39 +00:00
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t = polarToCartesian(0,0, 100, position+0.5*arc)
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2017-03-11 10:49:47 +00:00
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svg += '<text x="%s" y="%s" font-family="sans-serif" font-size="12" style=" stroke:color: black;" text-anchor="middle" transform="rotate(%s %s,%s)">%s</text>' % (t['x'], t['y'], position+0.5*arc, t['x'],t['y'], e)
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2017-03-08 10:09:39 +00:00
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position += arc
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i+=1
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svg += numbers
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svg += "</svg>"
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return svg
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# data is now in fractions
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def polarToCartesian(centerX, centerY, radius, angleInDegrees):
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"""
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Adapted from http://stackoverflow.com/a/18473154
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"""
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angleInRadians = (angleInDegrees - 90) * math.pi / 180.0;
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return {
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"x": str(centerX + (radius * math.cos(angleInRadians))),
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"y": str(centerY + (radius * math.sin(angleInRadians)))
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}
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def describeArc(x, y, radius, startAngle, endAngle):
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"""
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Adapted from http://stackoverflow.com/a/18473154
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"""
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start = polarToCartesian(x, y, radius, endAngle)
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end = polarToCartesian(x, y, radius, startAngle)
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largeArcFlag = "0" if endAngle - startAngle <= 180 else "1";
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d = " ".join([
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"M", start['x'], start['y'],
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"A", str(radius), str(radius), "0", largeArcFlag, "0", end['x'], end['y']
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]);
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return d
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# g = pie.Pie({})
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# options = dict(
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# width=640,
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# height=480,
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# fields=list(data.keys()),
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# graph_title='Question 7',
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# # expand_greatest = True,
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# show_data_labels = True,
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# compress=False,
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# css_inline=True,
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# )
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# g.__dict__.update(options)
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# g.add_data({'data': list(data.values()), 'title': 'Female'})
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# # g.add_data({'data': [0, 2, 1, 5, 4], 'title': 'Male'})
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# return str(g.burn())
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