ChartDirector Ver 5.0 (Python Edition)

Multi-Color Bar Chart




This example demonstrates creating a multi-color bar chart, in which each bar has a different color. It also demonstrates metallic background colors and various 3D border effects.

A multi-color bar layer is a bar layer in which each bar has a different color. It is created using XYChart.addBarLayer3. The colors can be specified explicitly (as is in this example), or can be taken automatically from the color palette.

Source Code Listing

[Standalone Version] pythondemo\colorbar.py
#!/usr/bin/python
from pychartdir import *

# The data for the bar chart
data = [85, 156, 179.5, 211, 123]

# The labels for the bar chart
labels = ["Mon", "Tue", "Wed", "Thu", "Fri"]

# The colors for the bar chart
colors = ['0xb8bc9c', '0xa0bdc4', '0x999966', '0x333366', '0xc3c3e6']

# Create a XYChart object of size 300 x 220 pixels. Use golden background color. Use
# a 2 pixel 3D border.
c = XYChart(300, 220, goldColor(), -1, 2)

# Add a title box using 10 point Arial Bold font. Set the background color to
# metallic blue (9999FF) Use a 1 pixel 3D border.
c.addTitle("Daily Network Load", "arialbd.ttf", 10).setBackground(metalColor(
    '0x9999ff'), -1, 1)

# Set the plotarea at (40, 40) and of 240 x 150 pixels in size
c.setPlotArea(40, 40, 240, 150)

# Add a multi-color bar chart layer using the given data and colors. Use a 1 pixel 3D
# border for the bars.
c.addBarLayer3(data, colors).setBorderColor(-1, 1)

# Set the labels on the x axis.
c.xAxis().setLabels(labels)

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

[CGI Version] pythondemo_cgi\colorbar.py
#!/usr/bin/python
from pychartdir import *

# The data for the bar chart
data = [85, 156, 179.5, 211, 123]

# The labels for the bar chart
labels = ["Mon", "Tue", "Wed", "Thu", "Fri"]

# The colors for the bar chart
colors = ['0xb8bc9c', '0xa0bdc4', '0x999966', '0x333366', '0xc3c3e6']

# Create a XYChart object of size 300 x 220 pixels. Use golden background color. Use
# a 2 pixel 3D border.
c = XYChart(300, 220, goldColor(), -1, 2)

# Add a title box using 10 point Arial Bold font. Set the background color to
# metallic blue (9999FF) Use a 1 pixel 3D border.
c.addTitle("Daily Network Load", "arialbd.ttf", 10).setBackground(metalColor(
    '0x9999ff'), -1, 1)

# Set the plotarea at (40, 40) and of 240 x 150 pixels in size
c.setPlotArea(40, 40, 240, 150)

# Add a multi-color bar chart layer using the given data and colors. Use a 1 pixel 3D
# border for the bars.
c.addBarLayer3(data, colors).setBorderColor(-1, 1)

# Set the labels on the x axis.
c.xAxis().setLabels(labels)

# Output the chart
print("Content-type: image/png\n")
binaryPrint(c.makeChart2(PNG))