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    A breakdown pie chart - ReportLab Snippets (Beta)

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    A breakdown pie chart
    opensourcerl-toolkit

    RLIMG: A breakdown pie chart

    Author:
    rptlab
    Posted:
    Dec. 3, 2009
    Language:
    Python
    Tags:
    opensource rl-toolkit

    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.

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    1. #Autogenerated by ReportLab guiedit do not edit  
    2. from reportlab.graphics.charts.piecharts import Pie  
    3. from reportlab.lib.colors import black, red, purple, green, maroon, brown, pink, white, HexColor  
    4. from reportlab.graphics.charts.legends import Legend  
    5. from reportlab.graphics.shapes import Drawing, _DrawingEditorMixin  
    6. from reportlab.lib.validators import Auto  
    7. from reportlab.lib.colors import HexColor, black  
    8.   
    9. pdf_chart_colors = [  
    10.         HexColor("#0000e5"),  
    11.         HexColor("#1f1feb"),  
    12.         HexColor("#5757f0"),  
    13.         HexColor("#8f8ff5"),  
    14.         HexColor("#c7c7fa"),  
    15.         HexColor("#f5c2c2"),  
    16.         HexColor("#eb8585"),  
    17.         HexColor("#e04747"),  
    18.         HexColor("#d60a0a"),  
    19.         HexColor("#cc0000"),  
    20.         HexColor("#ff0000"),  
    21.         ]  
    22.   
    23. def setItems(n, obj, attr, values):  
    24.     m = len(values)  
    25.     i = m // n  
    26.     for j in xrange(n):  
    27.         setattr(obj[j],attr,values[j*i % m])  
    28.   
    29. class BreakdownPieDrawing(_DrawingEditorMixin,Drawing):  
    30.     def __init__(self,width=400,height=200,*args,**kw):  
    31.         apply(Drawing.__init__,(self,width,height)+args,kw)  
    32.         # adding a pie chart to the drawing   
    33.         self._add(self,Pie(),name='pie',validate=None,desc=None)  
    34.         self.pie.width                  = 150  
    35.         self.pie.height                 = self.pie.width  
    36.         self.pie.x                      = 20  
    37.         self.pie.y                      = (height-self.pie.height)/2  
    38.         self.pie.data = [26.90,13.30,11.10,9.40,8.50,7.80,7.00,6.20,8.80,1.00]  
    39.         self.pie.labels = ['Financials','Energy','Health Care','Telecoms','Consumer','Consumer 2','Industrials','Materials','Other','Liquid Assets']  
    40.         self.pie.simpleLabels           = 1  
    41.         self.pie.slices.label_visible   = 0  
    42.         self.pie.slices.fontColor       = None  
    43.         self.pie.slices.strokeColor     = white  
    44.         self.pie.slices.strokeWidth     = 1  
    45.         # adding legend  
    46.         self._add(self,Legend(),name='legend',validate=None,desc=None)  
    47.         self.legend.x               = 200  
    48.         self.legend.y               = height/2  
    49.         self.legend.dx              = 8  
    50.         self.legend.dy              = 8  
    51.         self.legend.fontName        = 'Helvetica'  
    52.         self.legend.fontSize        = 7  
    53.         self.legend.boxAnchor       = 'w'  
    54.         self.legend.columnMaximum   = 10  
    55.         self.legend.strokeWidth     = 1  
    56.         self.legend.strokeColor     = black  
    57.         self.legend.deltax          = 75  
    58.         self.legend.deltay          = 10  
    59.         self.legend.autoXPadding    = 5  
    60.         self.legend.yGap            = 0  
    61.         self.legend.dxTextSpace     = 5  
    62.         self.legend.alignment       = 'right'  
    63.         self.legend.dividerLines    = 1|2|4  
    64.         self.legend.dividerOffsY    = 4.5  
    65.         self.legend.subCols.rpad    = 30  
    66.         n = len(self.pie.data)  
    67.         setItems(n,self.pie.slices,'fillColor',pdf_chart_colors)  
    68.         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)]  
    69.   
    70. if __name__=="__main__": #NORUNTESTS  
    71.     drawing = BreakdownPieDrawing()  
    72.     # the drawing will be saved as pdf and png below, you could do other things with it obviously.  
    73.     drawing.save(formats=['pdf','png'],outDir='.',fnRoot=None)  
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  • 原文地址：https://www.cnblogs.com/lexus/p/2469741.html
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