2D Donut Shading

pythondemo\donutshading.py
#!/usr/bin/python

# The ChartDirector for Python module is assumed to be in "../lib"
import sys, os
sys.path.insert(0, os.path.join(os.path.abspath(sys.path[0]), "..", "lib"))

from pychartdir import *

def createChart(chartIndex) :

    # The data for the pie chart
    data = [18, 30, 20, 15]

    # The colors to use for the sectors
    colors = [0x66aaee, 0xeebb22, 0xbbbbbb, 0x8844ff]

    # Create a PieChart object of size 200 x 220 pixels. Use a vertical gradient color from blue
    # (0000cc) to deep blue (000044) as background. Use rounded corners of 16 pixels radius.
    c = PieChart(200, 220)
    c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight(), 0x0000cc, 0x000044))
    c.setRoundedFrame(0xffffff, 16)

    # Set donut center at (100, 120), and outer/inner radii as 80/40 pixels
    c.setDonutSize(100, 120, 80, 40)

    # Set the pie data
    c.setData(data)

    # Set the sector colors
    c.setColors2(DataColor, colors)

    # Demonstrates various shading modes
    if chartIndex == 0 :
        c.addTitle("Default Shading", "bold", 12, 0xffffff)
    elif chartIndex == 1 :
        c.addTitle("Local Gradient", "bold", 12, 0xffffff)
        c.setSectorStyle(LocalGradientShading)
    elif chartIndex == 2 :
        c.addTitle("Global Gradient", "bold", 12, 0xffffff)
        c.setSectorStyle(GlobalGradientShading)
    elif chartIndex == 3 :
        c.addTitle("Concave Shading", "bold", 12, 0xffffff)
        c.setSectorStyle(ConcaveShading)
    elif chartIndex == 4 :
        c.addTitle("Rounded Edge", "bold", 12, 0xffffff)
        c.setSectorStyle(RoundedEdgeShading)
    elif chartIndex == 5 :
        c.addTitle("Radial Gradient", "bold", 12, 0xffffff)
        c.setSectorStyle(RadialShading)
    elif chartIndex == 6 :
        c.addTitle("Ring Shading", "bold", 12, 0xffffff)
        c.setSectorStyle(RingShading)

    # Disable the sector labels by setting the color to Transparent
    c.setLabelStyle("", 8, Transparent)

    # Output the chart
    c.makeChart("donutshading%s.png" % chartIndex)


createChart(0)
createChart(1)
createChart(2)
createChart(3)
createChart(4)
createChart(5)
createChart(6)