Start Angle and Direction

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

require("chartdirector")

class AnglepieController < ApplicationController

    def index()
        @title = "Start Angle and Direction"
        @ctrl_file = File.expand_path(__FILE__)
        @noOfCharts = 2
        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
        data = [25, 18, 15, 12, 8, 30, 35]

        # The labels for the pie chart
        labels = ["Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities", "Production"]

        # Create a PieChart object of size 280 x 240 pixels
        c = ChartDirector::PieChart.new(280, 240)

        # Set the center of the pie at (140, 130) and the radius to 80 pixels
        c.setPieSize(140, 130, 80)

        # Add a title to the pie to show the start angle and direction
        if chartIndex == 0
            c.addTitle("Start Angle = 0 degrees\nDirection = Clockwise")
        else
            c.addTitle("Start Angle = 90 degrees\nDirection = AntiClockwise")
            c.setStartAngle(90, false)
        end

        # Draw the pie in 3D
        c.set3D()

        # Set the pie data and the pie labels
        c.setData(data, labels)

        # Explode the 1st sector (index = 0)
        c.setExplode(0)

        # 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/anglepie.rb

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

def createChart(chartIndex)

    # The data for the pie chart
    data = [25, 18, 15, 12, 8, 30, 35]

    # The labels for the pie chart
    labels = ["Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities", "Production"]

    # Create a PieChart object of size 280 x 240 pixels
    c = ChartDirector::PieChart.new(280, 240)

    # Set the center of the pie at (140, 130) and the radius to 80 pixels
    c.setPieSize(140, 130, 80)

    # Add a title to the pie to show the start angle and direction
    if chartIndex == 0
        c.addTitle("Start Angle = 0 degrees\nDirection = Clockwise")
    else
        c.addTitle("Start Angle = 90 degrees\nDirection = AntiClockwise")
        c.setStartAngle(90, false)
    end

    # Draw the pie in 3D
    c.set3D()

    # Set the pie data and the pie labels
    c.setData(data, labels)

    # Explode the 1st sector (index = 0)
    c.setExplode(0)

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

createChart(0)
createChart(1)