How to create a Open flash chart in Rails Application

Open flash chart is a free service, by using it you can create different types of charts easily.

To create a open flash chart in Rails application at first you need
the open flash chart plugin. To get this plugin go to your project folder and run:
ruby script/plugin install http://svn.pullmonkey.com/plugins/trunk/open_flash_chart/

After this Move the open_flash_chart.swf file into your RAILS_ROOT/public directory

Now create a controller and add the following code

def index
  @graph_data = open_flash_chart_object(450,220, 
                '/flash_chart/show_flash_chart',false,'/',true)
end

def show_flash_chart
  begin
    chart = draw_chart
    render :text => chart
    rescue Exception => error
    logger.debug "error>>" + error.inspect
  end
end

def draw_chart

  chart_data = get_chart_data
 
  #get data to display in chart
  x_lebels = chart_data[:x_level]
  
  # get x labels in a array
  data = chart_data[:value]
  
  # get y axis value 
  line_data_hashes = [{:color => "#e11456", 
                    :legend => "Cost", :values => data}]
  g = Graph.new
  
  #draw line
  if line_data_hashes
    line_data_hashes.each do |line|
      g.line(2, line[:color], line[:legend], 10)
      g.set_data(line[:values])
    end
  end
  
  g.set_tool_tip('Year: #x_label#
  Cost: #val#')
  g.set_title("Sample Flash Chart",
              '{font-size: 14px; color: #784016}')
  
  #set minimum y axis value
  g.set_y_min(0) 
  
  #set maximum y axis value
  g.set_y_max(100)
  
  #set number of steps in y axis
  g.set_y_label_steps(5) 
  
  # set y axis legend
  g.set_y_legend("Cost", 12, "#b9d800") 
  
  # set x axix value
  g.set_x_labels(x_lebels)
  
  #set x axis label's style
  g.set_x_label_style(10, '#000000', 2) 
  
  #set x axis legend
  g.set_x_legend("Year", 12, "#b9d800")  

  return g.render

end

In index.rhtml put the following code

  <%= @graph_data %>

Now run it and you will see the magic