Cylinder Bar Shape

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

require("chartdirector")

class CylinderbarController < ApplicationController

    def index()
        @title = "Cylinder Bar Shape"
        @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 = [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 = ChartDirector::XYChart.new(400, 240)

        # Add a title to the chart using 14pt Times Bold Italic font
        c.addTitle("Weekly Server Load", "timesbi.ttf", 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(ChartDirector::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
        send_data(c.makeChart2(ChartDirector::PNG), :type => "image/png", :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/cylinderbar.rb

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

# 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 = ChartDirector::XYChart.new(400, 240)

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