Cylinder Bar Shape

This example demonstrates bars of cylinder shape.

ChartDirector supports bars in cylindrical or arbitrary polygonal shapes. The shape are specified using BarLayer.setBarShape or BarLayer.setBarShape2. In this example, the cylindrical shape is illustrated.

See Shape Specification on how built-in and custom shapes are defined in ChartDirector.

pythondemo\cylinderbar.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 = [85, 156, 179.5, 211, 123]

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

# Create a XYChart object of size 400 x 240 pixels.
c = XYChart(400, 240)

# Add a title to the chart using 14pt Times Bold Italic font
c.addTitle("Weekly Server Load", "Times New Roman Bold Italic", 14)

# Set the plotarea at (45, 40) and of 300 x 160 pixels in size. Use alternating light grey (f8f8f8)
# / white (ffffff) background.
c.setPlotArea(45, 40, 300, 160, 0xf8f8f8, 0xffffff)

# Add a multi-color bar chart layer
layer = c.addBarLayer3(data)

# Set layer to 3D with 10 pixels 3D depth
layer.set3D(10)

# Set bar shape to circular (cylinder)
layer.setBarShape(CircleShape)

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

# Add a title to the y axis
c.yAxis().setTitle("MBytes")

# Add a title to the x axis
c.xAxis().setTitle("Work Week 25")

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