Polar Area Chart

pythondemo\polararea.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 *

# Data for the chart
data0 = [5, 3, 10, 4, 3, 5, 2, 5]
data1 = [12, 6, 17, 6, 7, 9, 4, 7]
data2 = [17, 7, 22, 7, 18, 13, 5, 11]

labels = ["North", "North<*br*>East", "East", "South<*br*>East", "South", "South<*br*>West", "West",
    "North<*br*>West"]

# Create a PolarChart object of size 460 x 500 pixels, with a grey (e0e0e0) background and 1 pixel
# 3D border
c = PolarChart(460, 500, 0xe0e0e0, 0x000000, 1)

# Add a title to the chart at the top left corner using 15pt Arial Bold Italic font. Use a wood
# pattern as the title background.
c.addTitle("Polar Area Chart Demo", "Arial Bold Italic", 15).setBackground(c.patternColor("wood.png"
    ))

# Set center of plot area at (230, 280) with radius 180 pixels, and white (ffffff) background.
c.setPlotArea(230, 280, 180, 0xffffff)

# Set the grid style to circular grid
c.setGridStyle(0)

# Add a legend box at top-center of plot area (230, 35) using horizontal layout. Use 10pt Arial Bold
# font, with 1 pixel 3D border effect.
b = c.addLegend(230, 35, 0, "Arial Bold", 9)
b.setAlignment(TopCenter)
b.setBackground(Transparent, Transparent, 1)

# Set angular axis using the given labels
c.angularAxis().setLabels(labels)

# Specify the label format for the radial axis
c.radialAxis().setLabelFormat("{value}%")

# Set radial axis label background to semi-transparent grey (40cccccc)
c.radialAxis().setLabelStyle().setBackground(0x40cccccc, 0)

# Add the data as area layers
c.addAreaLayer(data2, -1, "5 m/s or above")
c.addAreaLayer(data1, -1, "1 - 5 m/s")
c.addAreaLayer(data0, -1, "less than 1 m/s")

# Output the chart
c.makeChart("polararea.png")