ChartDirector 7.0 (Python Edition)

Donut Width


        

This example demonstrates the effects of different donut widths.

Donut widths are configured by using different inner and outer radii when calling PieChart.setDonutSize.

Source Code Listing

pythondemo\donutwidth.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) : # Determine the donut inner radius (as percentage of outer radius) based on input parameter donutRadius = chartIndex * 25 # The data for the pie chart data = [10, 10, 10, 10, 10] # The labels for the pie chart labels = ["Marble", "Wood", "Granite", "Plastic", "Metal"] # Create a PieChart object of size 150 x 120 pixels, with a grey (EEEEEE) background, black # border and 1 pixel 3D border effect c = PieChart(150, 120, 0xeeeeee, 0x000000, 1) # Set donut center at (75, 65) and the outer radius to 50 pixels. Inner radius is computed # according donutWidth c.setDonutSize(75, 60, 50, int(50 * donutRadius / 100)) # Add a title to show the donut width c.addTitle("Inner Radius = %s %%" % (donutRadius), "Arial", 10).setBackground(0xcccccc, 0) # Draw the pie in 3D c.set3D(12) # Set the pie data and the pie labels c.setData(data, labels) # Disable the sector labels by setting the color to Transparent c.setLabelStyle("", 8, Transparent) # Output the chart c.makeChart("donutwidth%s.png" % chartIndex) createChart(0) createChart(1) createChart(2) createChart(3) createChart(4)