ChartDirector 6.0 (Ruby Edition)

Floating Box Chart




This example demonstrates creating a multi-color floating box chart.

This chart is composed of 4 box-whisker layers, created using XYChart.addBoxWhiskerLayer. Each layer handles boxes of one color. Only the "box" part of the box-whisker layer is used.

Source Code Listing

[Ruby On Rails Version - Controller] app/controllers/floatingbox_controller.rb
require("chartdirector")

class FloatingboxController < ApplicationController

    def index()
        @title = "Floating Box Chart"
        @ctrl_file = File.expand_path(__FILE__)
        @noOfCharts = 1
        render :template => "templates/chartview"
    end

    #
    # Render and deliver the chart
    #
    def getchart()
        # Sample data for the Box-Whisker chart. Represents the minimum, 1st quartile, medium, 3rd
        # quartile and maximum values of some quantities
        q0Data = [40, 45, 40, 30, 20, 50, 25, 44]
        q1Data = [55, 60, 50, 40, 38, 60, 51, 60]
        q2Data = [62, 70, 60, 50, 48, 70, 62, 70]
        q3Data = [70, 80, 65, 60, 53, 78, 69, 76]
        q4Data = [80, 90, 75, 70, 60, 85, 80, 84]

        # The labels for the chart
        labels = ["Group A", "Group B", "Group C", "Group D", "Group E", "Group F", "Group G",
            "Group H"]

        # Create a XYChart object of size 550 x 250 pixels
        c = ChartDirector::XYChart.new(550, 275)

        # Set the plotarea at (50, 25) and of size 450 x 200 pixels. Enable both horizontal and
        # vertical grids by setting their colors to grey (0xc0c0c0)
        c.setPlotArea(50, 50, 450, 200).setGridColor(0xc0c0c0, 0xc0c0c0)

        # Add a title to the chart
        c.addTitle("Computer Vision Test Scores")

        # Set the labels on the x axis and the font to Arial Bold
        c.xAxis().setLabels(labels).setFontStyle("arialbd.ttf")

        # Set the font for the y axis labels to Arial Bold
        c.yAxis().setLabelStyle("arialbd.ttf")

        # Add a Box Whisker layer using light blue 0x9999ff as the fill color and blue (0xcc) as the
        # line color. Set the line width to 2 pixels
        c.addBoxLayer(q4Data, q3Data, 0x00ff00, "Top 25%")
        c.addBoxLayer(q3Data, q2Data, 0x9999ff, "25% - 50%")
        c.addBoxLayer(q2Data, q1Data, 0xffff00, "50% - 75%")
        c.addBoxLayer(q1Data, q0Data, 0xff0000, "Bottom 25%")

        # Add legend box at top center above the plot area using 10pt Arial Bold Font
        b = c.addLegend(50 + 225, 22, false, "arialbd.ttf", 10)
        b.setAlignment(ChartDirector::TopCenter)
        b.setBackground(ChartDirector::Transparent)

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

# Sample data for the Box-Whisker chart. Represents the minimum, 1st quartile, medium, 3rd quartile
# and maximum values of some quantities
q0Data = [40, 45, 40, 30, 20, 50, 25, 44]
q1Data = [55, 60, 50, 40, 38, 60, 51, 60]
q2Data = [62, 70, 60, 50, 48, 70, 62, 70]
q3Data = [70, 80, 65, 60, 53, 78, 69, 76]
q4Data = [80, 90, 75, 70, 60, 85, 80, 84]

# The labels for the chart
labels = ["Group A", "Group B", "Group C", "Group D", "Group E", "Group F", "Group G", "Group H"]

# Create a XYChart object of size 550 x 250 pixels
c = ChartDirector::XYChart.new(550, 275)

# Set the plotarea at (50, 25) and of size 450 x 200 pixels. Enable both horizontal and vertical
# grids by setting their colors to grey (0xc0c0c0)
c.setPlotArea(50, 50, 450, 200).setGridColor(0xc0c0c0, 0xc0c0c0)

# Add a title to the chart
c.addTitle("Computer Vision Test Scores")

# Set the labels on the x axis and the font to Arial Bold
c.xAxis().setLabels(labels).setFontStyle("arialbd.ttf")

# Set the font for the y axis labels to Arial Bold
c.yAxis().setLabelStyle("arialbd.ttf")

# Add a Box Whisker layer using light blue 0x9999ff as the fill color and blue (0xcc) as the line
# color. Set the line width to 2 pixels
c.addBoxLayer(q4Data, q3Data, 0x00ff00, "Top 25%")
c.addBoxLayer(q3Data, q2Data, 0x9999ff, "25% - 50%")
c.addBoxLayer(q2Data, q1Data, 0xffff00, "50% - 75%")
c.addBoxLayer(q1Data, q0Data, 0xff0000, "Bottom 25%")

# Add legend box at top center above the plot area using 10pt Arial Bold Font
b = c.addLegend(50 + 225, 22, false, "arialbd.ttf", 10)
b.setAlignment(ChartDirector::TopCenter)
b.setBackground(ChartDirector::Transparent)

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