Cylinder Bar Shading

[Ruby On Rails Version - Controller] app/controllers/cylinderlightbar_controller.rb

require("chartdirector")

class CylinderlightbarController < ApplicationController

    def index()
        @title = "Cylinder Bar Shading"
        @ctrl_file = File.expand_path(__FILE__)
        @noOfCharts = 1
        render :template => "templates/chartview"
    end

    #
    # Render and deliver the chart
    #
    def getchart()
        # 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 = ChartDirector::XYChart.new(600, 380, ChartDirector::brushedSilverColor(),
            ChartDirector::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", "timesbi.ttf", 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, ChartDirector::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(ChartDirector::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)", "arialbd.ttf", 10)
        c.yAxis2().setTitle("USD (millions)", "arialbd.ttf", 10)

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

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

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

        # Output the chart
        send_data(c.makeChart2(ChartDirector::JPG), :type => "image/jpeg", :disposition => "inline")

    end

end

[Ruby On Rails Version - View] app/views/templates/chartview.html.erb

<html>
<body style="margin:5px 0px 0px 5px">

<!-- Title -->
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    <%= @title %>
</div>
<hr style="border:solid 1px #000080" />

<!-- Source Code Listing Link -->
<div style="font-size:9pt; font-family:verdana; margin-bottom:1.5em">
    <%= link_to "Source Code Listing", 
        :controller => "cddemo", :action => "viewsource",
        :ctrl_file => @ctrl_file, :view_file => File.expand_path(__FILE__) %>
</div>

<!-- Create one or more IMG tags to display the demo chart(s) -->
<% 0.upto(@noOfCharts - 1) do |i| %>
    <img src="<%= url_for(:action => "getchart", :img => i) %>">
<% end %>

</body>
</html>

[Command Line Version] rubydemo/cylinderlightbar.rb

#!/usr/bin/env ruby
require("chartdirector")

# 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 = ChartDirector::XYChart.new(600, 380, ChartDirector::brushedSilverColor(),
    ChartDirector::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", "timesbi.ttf", 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, ChartDirector::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(ChartDirector::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)", "arialbd.ttf", 10)
c.yAxis2().setTitle("USD (millions)", "arialbd.ttf", 10)

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

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

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

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