PullMonkey Blog


05 Jan

Open Flash Chart II - X Axis Date and Time


I was asked how to display date and time for the x axis as seen in this teethgrinder example - So here it goes.

Here is the graph we are after in this example:

More Open Flash Chart II examples.

And here is the code (the controller):

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class TestItController < ApplicationController
  def index
    @graph = open_flash_chart_object(550,300,"/test_it/chart")
  end
  def chart
    data1 = []
    data2 = []
    year = Time.now.year

    31.times do |i|
      x = "#{year}-1-#{i+1}".to_time.to_i
      y = (Math.sin(i+1) * 2.5) + 10

      data1 << ScatterValue.new(x,y)
      data2 << (Math.cos(i+1) * 1.9) + 4
    end

    dot = HollowDot.new
    dot.size = 3
    dot.halo_size = 2
    dot.tooltip = "#date:d M y#<br>Value: #val#"

    line = ScatterLine.new("#DB1750", 3)
    line.values = data1
    line.default_dot_style = dot

    x = XAxis.new
    x.set_range("#{year}-1-1".to_time.to_i, "#{year}-1-31".to_time.to_i)
    x.steps = 86400

    labels = XAxisLabels.new
    labels.text = "#date: l jS, M Y#"
    labels.steps = 86400
    labels.visible_steps = 2
    labels.rotate = 90

    x.labels = labels

    y = YAxis.new
    y.set_range(0,15,5)

    chart = OpenFlashChart.new
    title = Title.new(data2.size)

    chart.title = title
    chart.add_element(line)
    chart.x_axis = x
    chart.y_axis = y

    render :text => chart, :layout => false
  end
end

And in your view (index.html.erb):

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<script type="text/javascript" src="/javascripts/swfobject.js"></script>
<%= @graph %>

Good Luck!


04 Jan

Open Flash Chart II for Ruby on Rails - Lug Wyrm Charmer


A long time overdue, but I've managed to get everything updated to the new version of Teethgrinder's open flash chart.

I've also started tagging everything, so if you notice any problems trying to do anything from Teethgrinder's examples, then first check that you are using the latest (as of now, that is Lug Wyrm Charmer) - http://github.com/pullmonkey/open_flash_chart/tree/LugWyrmCharmer.

Make sure you are using the latest swf either from the plugin assets directory or from Teethgrinder's downloads.