A breakdown pie chart - ReportLab Snippets (Beta) - ReportLab.com
A breakdown pie chart - ReportLab Snippets (Beta)
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A breakdown pie chart
This shows a Pie chart with a Legend, being saved as both a bitmap for the web and a PDF chart. This code was generated using Diagra (ReportLab's commercial charts package), which allows you to define charts in a GUI. However, you don't need this package to run it, and all the chart features demonstrated are available in our open source package.
- #Autogenerated by ReportLab guiedit do not edit
- from reportlab.graphics.charts.piecharts import Pie
- from reportlab.lib.colors import black, red, purple, green, maroon, brown, pink, white, HexColor
- from reportlab.graphics.charts.legends import Legend
- from reportlab.graphics.shapes import Drawing, _DrawingEditorMixin
- from reportlab.lib.validators import Auto
- from reportlab.lib.colors import HexColor, black
- pdf_chart_colors = [
- HexColor("#0000e5"),
- HexColor("#1f1feb"),
- HexColor("#5757f0"),
- HexColor("#8f8ff5"),
- HexColor("#c7c7fa"),
- HexColor("#f5c2c2"),
- HexColor("#eb8585"),
- HexColor("#e04747"),
- HexColor("#d60a0a"),
- HexColor("#cc0000"),
- HexColor("#ff0000"),
- ]
- def setItems(n, obj, attr, values):
- m = len(values)
- i = m // n
- for j in xrange(n):
- setattr(obj[j],attr,values[j*i % m])
- class BreakdownPieDrawing(_DrawingEditorMixin,Drawing):
- def __init__(self,width=400,height=200,*args,**kw):
- apply(Drawing.__init__,(self,width,height)+args,kw)
- # adding a pie chart to the drawing
- self._add(self,Pie(),name='pie',validate=None,desc=None)
- self.pie.width = 150
- self.pie.height = self.pie.width
- self.pie.x = 20
- self.pie.y = (height-self.pie.height)/2
- self.pie.data = [26.90,13.30,11.10,9.40,8.50,7.80,7.00,6.20,8.80,1.00]
- self.pie.labels = ['Financials','Energy','Health Care','Telecoms','Consumer','Consumer 2','Industrials','Materials','Other','Liquid Assets']
- self.pie.simpleLabels = 1
- self.pie.slices.label_visible = 0
- self.pie.slices.fontColor = None
- self.pie.slices.strokeColor = white
- self.pie.slices.strokeWidth = 1
- # adding legend
- self._add(self,Legend(),name='legend',validate=None,desc=None)
- self.legend.x = 200
- self.legend.y = height/2
- self.legend.dx = 8
- self.legend.dy = 8
- self.legend.fontName = 'Helvetica'
- self.legend.fontSize = 7
- self.legend.boxAnchor = 'w'
- self.legend.columnMaximum = 10
- self.legend.strokeWidth = 1
- self.legend.strokeColor = black
- self.legend.deltax = 75
- self.legend.deltay = 10
- self.legend.autoXPadding = 5
- self.legend.yGap = 0
- self.legend.dxTextSpace = 5
- self.legend.alignment = 'right'
- self.legend.dividerLines = 1|2|4
- self.legend.dividerOffsY = 4.5
- self.legend.subCols.rpad = 30
- n = len(self.pie.data)
- setItems(n,self.pie.slices,'fillColor',pdf_chart_colors)
- self.legend.colorNamePairs = [(self.pie.slices[i].fillColor, (self.pie.labels[i][0:20], '%0.2f' % self.pie.data[i])) for i in xrange(n)]
- if __name__=="__main__": #NORUNTESTS
- drawing = BreakdownPieDrawing()
- # the drawing will be saved as pdf and png below, you could do other things with it obviously.
- drawing.save(formats=['pdf','png'],outDir='.',fnRoot=None)
