Borderless Bar Chart

This example demonstrates a horizontal bar chart with no axes, grid lines or and plot area border. It also demonstrates using gradient colors for the bars, and a number of other ChartDirector features.

The key features demonstrated in this example are:

Swap the x and y axes to create a horizontal bar chart using XYChart.swapXY.
Create a gradient color that changes smoothly from dark green to white along a horizontal direction using BaseChart.gradientColor, then use it as the bar color in XYChart.addBarLayer.
Set the plot area background, border and grid line colors to Transparent using XYChart.setPlotArea.
Set the x-axis, y-axis and y-axis labels to Transparent using Axis.setColors.
Set the x-axis font style to deep red 10 points Arial Bold Italic by using the TextBox.setFontStyle and TextBox.setFontColor of the TextBox object that represents the x-axis label prototype (obtained using Axis.setLabels).
Set the aggregate bar label style to deep red 10 points Times Bold Italic using Layer.setAggregateLabelStyle.
Customize the aggregate bar labels by using Layer.setAggregateLabelFormat.

pythondemo\hbar.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 = [3.9, 8.1, 10.9, 14.2, 18.1, 19.0, 21.2, 23.2, 25.7, 36]

# The labels for the bar chart
labels = ["Bastic Group", "Simpa", "YG Super", "CID", "Giga Tech", "Indo Digital", "Supreme",
    "Electech", "THP Thunder", "Flash Light"]

# Create a XYChart object of size 600 x 250 pixels
c = XYChart(600, 250)

# Add a title to the chart using Arial Bold Italic font
c.addTitle("Revenue Estimation - Year 2002", "Arial Bold Italic")

# Set the plotarea at (100, 30) and of size 400 x 200 pixels. Set the plotarea border, background
# and grid lines to Transparent
c.setPlotArea(100, 30, 400, 200, Transparent, Transparent, Transparent, Transparent, Transparent)

# Add a bar chart layer using the given data. Use a gradient color for the bars, where the gradient
# is from dark green (0x008000) to white (0xffffff)
layer = c.addBarLayer(data, c.gradientColor(100, 0, 500, 0, 0x008000, 0xffffff))

# Swap the axis so that the bars are drawn horizontally
c.swapXY(1)

# Set the bar gap to 10%
layer.setBarGap(0.1)

# Use the format "US$ xxx millions" as the bar label
layer.setAggregateLabelFormat("US$ {value} millions")

# Set the bar label font to 10pt Times Bold Italic/dark red (0x663300)
layer.setAggregateLabelStyle("Times New Roman Bold Italic", 10, 0x663300)

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

# Set the x axis label font to 10pt Arial Bold Italic
textbox.setFontStyle("Arial Bold Italic")
textbox.setFontSize(10)

# Set the x axis to Transparent, with labels in dark red (0x663300)
c.xAxis().setColors(Transparent, 0x663300)

# Set the y axis and labels to Transparent
c.yAxis().setColors(Transparent, Transparent)

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