Sector Zones

pythondemo\polarzones2.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 *

# The data for the chart
data = [5.1, 1.5, 5.1, 4.0, 1.7, 8.7, 9.4, 2.1, 3.5, 8.8, 5.0, 6.0]

# The labels for the chart
labels = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sept", "Oct", "Nov", "Dec"]

# Create a PolarChart object of size 400 x 420 pixels. with a metallic blue (9999ff) background
# color and 1 pixel 3D border
c = PolarChart(400, 420, metalColor(0x9999ff), 0x000000, 1)

# Add a title to the chart using 16pt Arial Bold Italic font. The title text is white (0xffffff) on
# deep blue (000080) background
c.addTitle("Chemical Concentration", "Arial Bold Italic", 16, 0xffffff).setBackground(0x000080)

# Set center of plot area at (200, 240) with radius 145 pixels. Set background color to green
# (0x33ff33)
c.setPlotArea(200, 240, 145, 0x33ff33)

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

# Color the sector between label index = 5.5 to 7.5 as red (ff3333) zone
c.angularAxis().addZone(5.5, 7.5, 0xff3333)

# Color the sector between label index = 4.5 to 5.5, and also between 7.5 to 8.5, as yellow (ff3333)
# zones
c.angularAxis().addZone(4.5, 5.5, 0xffff00)
c.angularAxis().addZone(7.5, 8.5, 0xffff00)

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

# Use semi-transparent (40ffffff) label background so as not to block the data
c.radialAxis().setLabelStyle().setBackground(0x40ffffff, 0x40000000)

# Add a legend box at (200, 30) top center aligned, using 9pt Arial Bold font. with a black border.
legendBox = c.addLegend(200, 30, 0, "Arial Bold", 9)
legendBox.setAlignment(TopCenter)

# Add legend keys to represent the red/yellow/green zones
legendBox.addKey("Very Dry", 0xff3333)
legendBox.addKey("Critical", 0xffff00)
legendBox.addKey("Moderate", 0x33ff33)

# Add a blue (0x80) line layer with line width set to 3 pixels and use purple (ff00ff) cross symbols
# for the data points
layer = c.addLineLayer(data, 0x000080)
layer.setLineWidth(3)
layer.setDataSymbol(Cross2Shape(), 15, 0xff00ff)

# Output the chart
c.makeChart("polarzones2.png")