Depth Bar Chart

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

require("chartdirector")

class DepthbarController < ApplicationController

    def index()
        @title = "Depth Bar Chart"
        @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
        data0 = [100, 125, 245, 147, 67]
        data1 = [85, 156, 179, 211, 123]
        data2 = [97, 87, 56, 267, 157]

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

        # Create a XYChart object of size 500 x 320 pixels
        c = ChartDirector::XYChart.new(500, 320)

        # Set the plotarea at (100, 40) and of size 280 x 240 pixels
        c.setPlotArea(100, 40, 280, 240)

        # Add a legend box at (405, 100)
        c.addLegend(405, 100)

        # Add a title to the chart
        c.addTitle("Weekday Network Load")

        # Add a title to the y axis. Draw the title upright (font angle = 0)
        c.yAxis().setTitle("Average\nWorkload\n(MBytes\nPer Hour)").setFontAngle(0)

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

        # Add three bar layers, each representing one data set. The bars are drawn in
        # semi-transparent colors.
        c.addBarLayer(data0, 0x808080ff, "Server # 1", 5)
        c.addBarLayer(data1, 0x80ff0000, "Server # 2", 5)
        c.addBarLayer(data2, 0x8000ff00, "Server # 3", 5)

        # 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/depthbar.rb

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

# The data for the bar chart
data0 = [100, 125, 245, 147, 67]
data1 = [85, 156, 179, 211, 123]
data2 = [97, 87, 56, 267, 157]

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

# Create a XYChart object of size 500 x 320 pixels
c = ChartDirector::XYChart.new(500, 320)

# Set the plotarea at (100, 40) and of size 280 x 240 pixels
c.setPlotArea(100, 40, 280, 240)

# Add a legend box at (405, 100)
c.addLegend(405, 100)

# Add a title to the chart
c.addTitle("Weekday Network Load")

# Add a title to the y axis. Draw the title upright (font angle = 0)
c.yAxis().setTitle("Average\nWorkload\n(MBytes\nPer Hour)").setFontAngle(0)

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

# Add three bar layers, each representing one data set. The bars are drawn in semi-transparent
# colors.
c.addBarLayer(data0, 0x808080ff, "Server # 1", 5)
c.addBarLayer(data1, 0x80ff0000, "Server # 2", 5)
c.addBarLayer(data2, 0x8000ff00, "Server # 3", 5)

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