ChartDirector 7.0 (Python Edition)

3D Donut Chart




This example demonstrates a 3D donut chart with sector gradient shading. It also demonstrates gradient color background, rounded frame, custom sector colors, and using CDML and Parameter Substitution and Formatting to format sector labels

Source Code Listing

pythondemo\threeddonut.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 pie chart data = [20, 10, 15, 12] # The labels for the pie chart labels = ["Labor", "Licenses", "Facilities", "Production"] # The colors to use for the sectors colors = [0x66aaee, 0xeebb22, 0xcccccc, 0xcc88ff] # Create a PieChart object of size 600 x 320 pixels. Use a vertical gradient color from deep blue # (000066) to blue (0000cc) as background. Use rounded corners of 20 pixels radius. c = PieChart(600, 320) c.setBackground(c.linearGradientColor(0, 0, 0, c.getHeight(), 0x000066, 0x0000cc)) c.setRoundedFrame(0xffffff, 20) # Add a title using 18pt Times New Roman Bold Italic font in white (ffffff) color. Set top/bottom # margins to 8 pixels. title = c.addTitle("Donut Chart Demonstration", "Times New Roman Bold Italic", 18, 0xffffff) title.setMargin2(0, 0, 8, 8) # Add a separator line in white color just under the title c.addLine(10, title.getHeight(), c.getWidth() - 11, title.getHeight(), 0xffffff) # Set donut center at (300, 170), and outer/inner radii as 120/60 pixels c.setDonutSize(300, 170, 120, 60) # Draw the pie in 3D with a pie thickness of 25 pixels c.set3D(25) # Set the pie data and the pie labels c.setData(data, labels) # Set the sector colors c.setColors2(DataColor, colors) # Use local gradient shading for the sectors c.setSectorStyle(LocalGradientShading) # Set sector border color to same as fill color. Set label join line color to white (ffffff) c.setLineColor(SameAsMainColor, 0xffffff) # Use the side label layout method, with the labels positioned 16 pixels from the donut bounding box c.setLabelLayout(SideLayout, 16) # Set the sector label format. The label consists of two lines. The first line is the sector name in # Times Bold Italic font and is underlined. The second line shows the data value and percentage. c.setLabelFormat( "<*block,halign=left*><*font=Times New Roman Bold Italic,size=12,underline=1*>{label}" \ "<*/font*><*br*>US$ {value}K ({percent}%)") # Set the label box background color the same as the sector color. Use soft lighting effect with # light direction from right. Use rounded corners. t = c.setLabelStyle() t.setBackground(SameAsMainColor, Transparent, softLighting(Right)) t.setRoundedCorners() # Output the chart c.makeChart("threeddonut.png")