Cylinder Bar Shading

This example demonstrates using cylinder shading effect for bars. It also demonstrates brushed metal background, rounded frame, and axis labels on both sides of the plot area.

The brushed silver background is achieved by using pychartdir.brushedSilverColor to create the brushed silver color, then use it in XYChart.XYChart as the chart background color.
The rounded frame is configured using BaseChart.setRoundedFrame.
The cylinder shading effect is configured by using BarLayer.setBarShape with CircleShape.
XYChart.syncYAxis is used to show two synchronized y-axes on both sides of the plot area.
Axis.setColors is used to set the y-axes to Transparent, so only the axis labels are visible.
The axis label font is set to Arial Bold using Axis.setLabelStyle.

pythondemo\cylinderlightbar.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 bar chart
data = [450, 560, 630, 800, 1100, 1350, 1600, 1950, 2300, 2700]

# The labels for the bar chart
labels = ["1996", "1997", "1998", "1999", "2000", "2001", "2002", "2003", "2004", "2005"]

# Create a XYChart object of size 600 x 380 pixels. Set background color to brushed silver, with a 2
# pixel 3D border. Use rounded corners of 20 pixels radius.
c = XYChart(600, 380, brushedSilverColor(), Transparent, 2)

# Add a title to the chart using 18pt Times Bold Italic font. Set top/bottom margins to 8 pixels.
c.addTitle("Annual Revenue for Star Tech", "Times New Roman Bold Italic", 18).setMargin2(0, 0, 8, 8)

# Set the plotarea at (70, 55) and of size 460 x 280 pixels. Use transparent border and black grid
# lines. Use rounded frame with radius of 20 pixels.
c.setPlotArea(70, 55, 460, 280, -1, -1, Transparent, 0x000000)
c.setRoundedFrame(0xffffff, 20)

# Add a multi-color bar chart layer using the supplied data. Set cylinder bar shape.
c.addBarLayer3(data).setBarShape(CircleShape)

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

# Show the same scale on the left and right y-axes
c.syncYAxis()

# Set the left y-axis and right y-axis title using 10pt Arial Bold font
c.yAxis().setTitle("USD (millions)", "Arial Bold", 10)
c.yAxis2().setTitle("USD (millions)", "Arial Bold", 10)

# Set y-axes to transparent
c.yAxis().setColors(Transparent)
c.yAxis2().setColors(Transparent)

# Disable ticks on the x-axis by setting the tick color to transparent
c.xAxis().setTickColor(Transparent)

# Set the label styles of all axes to 8pt Arial Bold font
c.xAxis().setLabelStyle("Arial Bold", 8)
c.yAxis().setLabelStyle("Arial Bold", 8)
c.yAxis2().setLabelStyle("Arial Bold", 8)

# Output the chart
c.makeChart("cylinderlightbar.jpg")