Pattern Area Chart

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

require("chartdirector")

class PatternareaController < ApplicationController

    def index()
        @title = "Pattern Area 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 area chart
        data = [3.0, 2.8, 4.0, 5.5, 7.5, 6.8, 5.4, 6.0, 5.0, 6.2, 7.5, 6.5, 7.5, 8.1, 6.0, 5.5, 5.3,
            3.5, 5.0, 6.6, 5.6, 4.8, 5.2, 6.5, 6.2]

        # The labels for the area chart
        labels = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14",
            "15", "16", "17", "18", "19", "20", "21", "22", "23", "24"]

        # Create a XYChart object of size 300 x 180 pixels. Set the background to pale yellow
        # (0xffffa0) with a black border (0x0)
        c = ChartDirector::XYChart.new(300, 180, 0xffffa0, 0x000000)

        # Set the plotarea at (45, 35) and of size 240 x 120 pixels. Set the background to white
        # (0xffffff). Set both horizontal and vertical grid lines to black (&H0&) dotted lines
        # (pattern code 0x0103)
        c.setPlotArea(45, 35, 240, 120, 0xffffff, -1, -1, c.dashLineColor(0x000000, 0x000103),
            c.dashLineColor(0x000000, 0x000103))

        # Add a title to the chart using 10pt Arial Bold font. Use a 1 x 2 bitmap pattern as the
        # background. Set the border to black (0x0).
        c.addTitle("Snow Percipitation (Dec 12)", "arialbd.ttf", 10).setBackground(c.patternColor([
            0xb0b0f0, 0xe0e0ff], 2), 0x000000)

        # Add a title to the y axis
        c.yAxis().setTitle("mm per hour")

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

        # Display 1 out of 3 labels on the x-axis.
        c.xAxis().setLabelStep(3)

        # Add an area layer to the chart
        layer = c.addAreaLayer()

        # Load a snow pattern from an external file "snow.png".
        snowPattern = c.patternColor2(File.dirname(__FILE__) + "/snow.png")

        # Add a data set to the area layer using the snow pattern as the fill color. Use deep blue
        # (0x0000ff) as the area border line color (&H0000ff&)
        layer.addDataSet(data).setDataColor(snowPattern, 0x0000ff)

        # Set the line width to 2 pixels to highlight the line
        layer.setLineWidth(2)

        # 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/patternarea.rb

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

# The data for the area chart
data = [3.0, 2.8, 4.0, 5.5, 7.5, 6.8, 5.4, 6.0, 5.0, 6.2, 7.5, 6.5, 7.5, 8.1, 6.0, 5.5, 5.3, 3.5,
    5.0, 6.6, 5.6, 4.8, 5.2, 6.5, 6.2]

# The labels for the area chart
labels = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12", "13", "14", "15",
    "16", "17", "18", "19", "20", "21", "22", "23", "24"]

# Create a XYChart object of size 300 x 180 pixels. Set the background to pale yellow (0xffffa0)
# with a black border (0x0)
c = ChartDirector::XYChart.new(300, 180, 0xffffa0, 0x000000)

# Set the plotarea at (45, 35) and of size 240 x 120 pixels. Set the background to white (0xffffff).
# Set both horizontal and vertical grid lines to black (&H0&) dotted lines (pattern code 0x0103)
c.setPlotArea(45, 35, 240, 120, 0xffffff, -1, -1, c.dashLineColor(0x000000, 0x000103),
    c.dashLineColor(0x000000, 0x000103))

# Add a title to the chart using 10pt Arial Bold font. Use a 1 x 2 bitmap pattern as the background.
# Set the border to black (0x0).
c.addTitle("Snow Percipitation (Dec 12)", "arialbd.ttf", 10).setBackground(c.patternColor([0xb0b0f0,
    0xe0e0ff], 2), 0x000000)

# Add a title to the y axis
c.yAxis().setTitle("mm per hour")

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

# Display 1 out of 3 labels on the x-axis.
c.xAxis().setLabelStep(3)

# Add an area layer to the chart
layer = c.addAreaLayer()

# Load a snow pattern from an external file "snow.png".
snowPattern = c.patternColor2("snow.png")

# Add a data set to the area layer using the snow pattern as the fill color. Use deep blue
# (0x0000ff) as the area border line color (&H0000ff&)
layer.addDataSet(data).setDataColor(snowPattern, 0x0000ff)

# Set the line width to 2 pixels to highlight the line
layer.setLineWidth(2)

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