Background and Wallpaper

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

require("chartdirector")

class BackgroundController < ApplicationController

    def index()
        @title = "Background and Wallpaper"
        @ctrl_file = File.expand_path(__FILE__)
        @noOfCharts = 4
        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 chart
        data = [85, 156, 179.5, 211, 123]
        labels = ["Mon", "Tue", "Wed", "Thu", "Fri"]

        # Create a XYChart object of size 270 x 270 pixels
        c = ChartDirector::XYChart.new(270, 270)

        # Set the plot area at (40, 32) and of size 200 x 200 pixels
        plotarea = c.setPlotArea(40, 32, 200, 200)

        # Set the background style based on the input parameter
        if chartIndex == 0
            # Has wallpaper image
            c.setWallpaper(File.dirname(__FILE__) + "/tile.gif")
        elsif chartIndex == 1
            # Use a background image as the plot area background
            plotarea.setBackground2(File.dirname(__FILE__) + "/bg.png")
        elsif chartIndex == 2
            # Use white (0xffffff) and grey (0xe0e0e0) as two alternate plotarea background colors
            plotarea.setBackground(0xffffff, 0xe0e0e0)
        else
            # Use a dark background palette
            c.setColors(ChartDirector::whiteOnBlackPalette)
        end

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

        # Add a color bar layer using the given data. Use a 1 pixel 3D border for the bars.
        c.addBarLayer3(data).setBorderColor(-1, 1)

        # 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/background.rb

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

def createChart(chartIndex)

    # The data for the chart
    data = [85, 156, 179.5, 211, 123]
    labels = ["Mon", "Tue", "Wed", "Thu", "Fri"]

    # Create a XYChart object of size 270 x 270 pixels
    c = ChartDirector::XYChart.new(270, 270)

    # Set the plot area at (40, 32) and of size 200 x 200 pixels
    plotarea = c.setPlotArea(40, 32, 200, 200)

    # Set the background style based on the input parameter
    if chartIndex == 0
        # Has wallpaper image
        c.setWallpaper("tile.gif")
    elsif chartIndex == 1
        # Use a background image as the plot area background
        plotarea.setBackground2("bg.png")
    elsif chartIndex == 2
        # Use white (0xffffff) and grey (0xe0e0e0) as two alternate plotarea background colors
        plotarea.setBackground(0xffffff, 0xe0e0e0)
    else
        # Use a dark background palette
        c.setColors(ChartDirector::whiteOnBlackPalette)
    end

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

    # Add a color bar layer using the given data. Use a 1 pixel 3D border for the bars.
    c.addBarLayer3(data).setBorderColor(-1, 1)

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

createChart(0)
createChart(1)
createChart(2)
createChart(3)