Polygon Bar Shapes

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

require("chartdirector")

class PolygonbarController < ApplicationController

    def index()
        @title = "Polygon Bar Shapes"
        @ctrl_file = File.expand_path(__FILE__)
        @noOfCharts = 1
        render :template => "templates/chartview"
    end

    #
    # Render and deliver the chart
    #
    def getchart()
        # The data for the bar chart
        data = [85, 156, 179.5, 211, 123, 176, 195]

        # The labels for the bar chart
        labels = ["Square", "Star(8)", "Polygon(6)", "Cross", "Cross2", "Diamond", "Custom"]

        # Create a XYChart object of size 500 x 280 pixels.
        c = ChartDirector::XYChart.new(500, 280)

        # Set the plotarea at (50, 40) with alternating light grey (f8f8f8) / white (ffffff)
        # background
        c.setPlotArea(50, 40, 400, 200, 0xf8f8f8, 0xffffff)

        # Add a title to the chart using 14pt Arial Bold Italic font
        c.addTitle("    Bar Shape Demonstration", "arialbi.ttf", 14)

        # Add a multi-color bar chart layer
        layer = c.addBarLayer3(data)

        # Set layer to 3D with 10 pixels 3D depth
        layer.set3D(10)

        # Set bar shape to circular (cylinder)
        layer.setBarShape(ChartDirector::CircleShape)

        # Set the first bar (index = 0) to square shape
        layer.setBarShape(ChartDirector::SquareShape, 0, 0)

        # Set the second bar to 8-pointed star
        layer.setBarShape(ChartDirector::StarShape(8), 0, 1)

        # Set the third bar to 6-sided polygon
        layer.setBarShape(ChartDirector::PolygonShape(6), 0, 2)

        # Set the next 3 bars to cross shape, X shape and diamond shape
        layer.setBarShape(ChartDirector::CrossShape(), 0, 3)
        layer.setBarShape(ChartDirector::Cross2Shape(), 0, 4)
        layer.setBarShape(ChartDirector::DiamondShape, 0, 5)

        # Set the last bar to a custom shape, specified as an array of (x, y) points in normalized
        # coordinates
        layer.setBarShape2([-500, 0, 0, 500, 500, 0, 500, 1000, 0, 500, -500, 1000], 0, 6)

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

        # Add a title to the y axis
        c.yAxis().setTitle("Frequency")

        # Add a title to the x axis
        c.xAxis().setTitle("Shapes")

        # 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/polygonbar.rb

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

# The data for the bar chart
data = [85, 156, 179.5, 211, 123, 176, 195]

# The labels for the bar chart
labels = ["Square", "Star(8)", "Polygon(6)", "Cross", "Cross2", "Diamond", "Custom"]

# Create a XYChart object of size 500 x 280 pixels.
c = ChartDirector::XYChart.new(500, 280)

# Set the plotarea at (50, 40) with alternating light grey (f8f8f8) / white (ffffff) background
c.setPlotArea(50, 40, 400, 200, 0xf8f8f8, 0xffffff)

# Add a title to the chart using 14pt Arial Bold Italic font
c.addTitle("    Bar Shape Demonstration", "arialbi.ttf", 14)

# Add a multi-color bar chart layer
layer = c.addBarLayer3(data)

# Set layer to 3D with 10 pixels 3D depth
layer.set3D(10)

# Set bar shape to circular (cylinder)
layer.setBarShape(ChartDirector::CircleShape)

# Set the first bar (index = 0) to square shape
layer.setBarShape(ChartDirector::SquareShape, 0, 0)

# Set the second bar to 8-pointed star
layer.setBarShape(ChartDirector::StarShape(8), 0, 1)

# Set the third bar to 6-sided polygon
layer.setBarShape(ChartDirector::PolygonShape(6), 0, 2)

# Set the next 3 bars to cross shape, X shape and diamond shape
layer.setBarShape(ChartDirector::CrossShape(), 0, 3)
layer.setBarShape(ChartDirector::Cross2Shape(), 0, 4)
layer.setBarShape(ChartDirector::DiamondShape, 0, 5)

# Set the last bar to a custom shape, specified as an array of (x, y) points in normalized
# coordinates
layer.setBarShape2([-500, 0, 0, 500, 500, 0, 500, 1000, 0, 500, -500, 1000], 0, 6)

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

# Add a title to the y axis
c.yAxis().setTitle("Frequency")

# Add a title to the x axis
c.xAxis().setTitle("Shapes")

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