Multi-Pie Chart

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

require("chartdirector")

class MultipieController < ApplicationController

    def index()
        @title = "Multi-Pie Chart"
        @ctrl_file = File.expand_path(__FILE__)
        @noOfCharts = 3
        render :template => "templates/chartview"
    end

    #
    # Render and deliver the chart
    #
    def getchart()
        # This script can draw different charts depending on the chartIndex
        chartIndex = (params["img"]).to_i

        # The data for the pie chart
        data0 = [25, 18, 15]
        data1 = [14, 32, 24]
        data2 = [25, 23, 9]

        # The labels for the pie chart
        labels = ["Software", "Hardware", "Services"]

        # Create a PieChart object of size 180 x 160 pixels
        c = ChartDirector::PieChart.new(180, 160)

        # Set the center of the pie at (90, 80) and the radius to 60 pixels
        c.setPieSize(90, 80, 60)

        # Set the border color of the sectors to white (ffffff)
        c.setLineColor(0xffffff)

        # Set the background color of the sector label to pale yellow (ffffc0) with a black border
        # (000000)
        c.setLabelStyle().setBackground(0xffffc0, 0x000000)

        # Set the label to be slightly inside the perimeter of the circle
        c.setLabelLayout(ChartDirector::CircleLayout, -10)

        # Set the title, data and colors according to which pie to draw
        if chartIndex == 0
            c.addTitle("Alpha Division", "arialbd.ttf", 8)
            c.setData(data0, labels)
            c.setColors2(ChartDirector::DataColor, [0xff3333, 0xff9999, 0xffcccc])
        elsif chartIndex == 1
            c.addTitle("Beta Division", "arialbd.ttf", 8)
            c.setData(data1, labels)
            c.setColors2(ChartDirector::DataColor, [0x33ff33, 0x99ff99, 0xccffcc])
        else
            c.addTitle("Gamma Division", "arialbd.ttf", 8)
            c.setData(data2, labels)
            c.setColors2(ChartDirector::DataColor, [0x3333ff, 0x9999ff, 0xccccff])
        end

        # 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/multipie.rb

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

def createChart(chartIndex)

    # The data for the pie chart
    data0 = [25, 18, 15]
    data1 = [14, 32, 24]
    data2 = [25, 23, 9]

    # The labels for the pie chart
    labels = ["Software", "Hardware", "Services"]

    # Create a PieChart object of size 180 x 160 pixels
    c = ChartDirector::PieChart.new(180, 160)

    # Set the center of the pie at (90, 80) and the radius to 60 pixels
    c.setPieSize(90, 80, 60)

    # Set the border color of the sectors to white (ffffff)
    c.setLineColor(0xffffff)

    # Set the background color of the sector label to pale yellow (ffffc0) with a black border
    # (000000)
    c.setLabelStyle().setBackground(0xffffc0, 0x000000)

    # Set the label to be slightly inside the perimeter of the circle
    c.setLabelLayout(ChartDirector::CircleLayout, -10)

    # Set the title, data and colors according to which pie to draw
    if chartIndex == 0
        c.addTitle("Alpha Division", "arialbd.ttf", 8)
        c.setData(data0, labels)
        c.setColors2(ChartDirector::DataColor, [0xff3333, 0xff9999, 0xffcccc])
    elsif chartIndex == 1
        c.addTitle("Beta Division", "arialbd.ttf", 8)
        c.setData(data1, labels)
        c.setColors2(ChartDirector::DataColor, [0x33ff33, 0x99ff99, 0xccffcc])
    else
        c.addTitle("Gamma Division", "arialbd.ttf", 8)
        c.setData(data2, labels)
        c.setColors2(ChartDirector::DataColor, [0x3333ff, 0x9999ff, 0xccccff])
    end

    # Output the chart
    c.makeChart("multipie%s.png" % chartIndex)
end

createChart(0)
createChart(1)
createChart(2)