Redmine

            TYPE_DUPLICATES =>  { :name => :label_duplicates, :sym_name => :label_duplicated_by, :order => 2 },

            TYPE_BLOCKS =>      { :name => :label_blocks, :sym_name => :label_blocked_by, :order => 3 },

            TYPE_PRECEDES =>    { :name => :label_precedes, :sym_name => :label_follows, :order => 4 },

          }.freeze

  def self.up

    create_table "attachments", :force => true do |t|

      t.column "container_id", :integer, :default => 0, :null => false

      t.column "container_type", :string, :limit => 30, :default => "", :null => false

      t.column "filename", :string, :default => "", :null => false

      t.column "disk_filename", :string, :default => "", :null => false

      t.column "filesize", :integer, :default => 0, :null => false

      t.column "content_type", :string, :limit => 60, :default => ""

      t.column "digest", :string, :limit => 40, :default => "", :null => false

      t.column "downloads", :integer, :default => 0, :null => false

      t.column "author_id", :integer, :default => 0, :null => false

      t.column "created_on", :timestamp

    end

      t.column "type", :string, :limit => 30, :default => "", :null => false

      t.column "name", :string, :limit => 30, :default => "", :null => false

      t.column "field_format", :string, :limit => 30, :default => "", :null => false

      t.column "possible_values", :text

      t.column "regexp", :string, :default => ""

      t.column "min_length", :integer, :default => 0, :null => false

      t.column "max_length", :integer, :default => 0, :null => false

    end

    create_table "custom_fields_projects", :id => false, :force => true do |t|

      t.column "custom_field_id", :integer, :default => 0, :null => false

      t.column "project_id", :integer, :default => 0, :null => false

    end

    create_table "custom_values", :force => true do |t|

      t.column "custom_field_id", :integer, :default => 0, :null => false

      t.column "value", :text

    end

    create_table "documents", :force => true do |t|

      t.column "project_id", :integer, :default => 0, :null => false

      t.column "category_id", :integer, :default => 0, :null => false

      t.column "title", :string, :limit => 60, :default => "", :null => false

      t.column "description", :text

      t.column "created_on", :timestamp

    add_index "documents", ["project_id"], :name => "documents_project_id"

    create_table "enumerations", :force => true do |t|

      t.column "opt", :string, :limit => 4, :default => "", :null => false

      t.column "name", :string, :limit => 30, :default => "", :null => false

    end

    create_table "issue_categories", :force => true do |t|

      t.column "project_id", :integer, :default => 0, :null => false

      t.column "name", :string, :limit => 30, :default => "", :null => false

    add_index "issue_categories", ["project_id"], :name => "issue_categories_project_id"

    create_table "issue_histories", :force => true do |t|

      t.column "issue_id", :integer, :default => 0, :null => false

      t.column "status_id", :integer, :default => 0, :null => false

      t.column "author_id", :integer, :default => 0, :null => false

      t.column "notes", :text

      t.column "created_on", :timestamp

    end

    add_index "issue_histories", ["issue_id"], :name => "issue_histories_issue_id"

    create_table "issue_statuses", :force => true do |t|

      t.column "name", :string, :limit => 30, :default => "", :null => false

      t.column "is_closed", :boolean, :default => false, :null => false

      t.column "is_default", :boolean, :default => false, :null => false

      t.column "html_color", :string, :limit => 6, :default => "FFFFFF", :null => false

    end

    create_table "issues", :force => true do |t|

      t.column "tracker_id", :integer, :default => 0, :null => false

      t.column "project_id", :integer, :default => 0, :null => false

      t.column "subject", :string, :default => "", :null => false

      t.column "due_date", :date

      t.column "category_id", :integer

      t.column "status_id", :integer, :default => 0, :null => false

      t.column "assigned_to_id", :integer

      t.column "priority_id", :integer, :default => 0, :null => false

      t.column "fixed_version_id", :integer

      t.column "lock_version", :integer, :default => 0, :null => false

      t.column "created_on", :timestamp

      t.column "updated_on", :timestamp

    end

    add_index "issues", ["project_id"], :name => "issues_project_id"

    create_table "members", :force => true do |t|

      t.column "user_id", :integer, :default => 0, :null => false

      t.column "project_id", :integer, :default => 0, :null => false

      t.column "role_id", :integer, :default => 0, :null => false

      t.column "created_on", :timestamp

    end

    create_table "news", :force => true do |t|

      t.column "project_id", :integer

      t.column "title", :string, :limit => 60, :default => "", :null => false

      t.column "summary", :string, :limit => 255, :default => ""

      t.column "description", :text

      t.column "author_id", :integer, :default => 0, :null => false

      t.column "created_on", :timestamp

    add_index "news", ["project_id"], :name => "news_project_id"

    create_table "permissions", :force => true do |t|

      t.column "controller", :string, :limit => 30, :default => "", :null => false

      t.column "action", :string, :limit => 30, :default => "", :null => false

      t.column "description", :string, :limit => 60, :default => "", :null => false

      t.column "is_public", :boolean, :default => false, :null => false

      t.column "sort", :integer, :default => 0, :null => false

      t.column "mail_option", :boolean, :default => false, :null => false

      t.column "mail_enabled", :boolean, :default => false, :null => false

    end

    create_table "permissions_roles", :id => false, :force => true do |t|

      t.column "permission_id", :integer, :default => 0, :null => false

      t.column "role_id", :integer, :default => 0, :null => false

    end

    add_index "permissions_roles", ["role_id"], :name => "permissions_roles_role_id"

    create_table "projects", :force => true do |t|

      t.column "name", :string, :limit => 30, :default => "", :null => false

      t.column "description", :string, :default => "", :null => false

      t.column "homepage", :string, :limit => 60, :default => ""

      t.column "projects_count", :integer, :default => 0

      t.column "created_on", :timestamp

      t.column "updated_on", :timestamp

    end

    create_table "roles", :force => true do |t|

      t.column "name", :string, :limit => 30, :default => "", :null => false

    end

    create_table "trackers", :force => true do |t|

      t.column "name", :string, :limit => 30, :default => "", :null => false

      t.column "is_in_chlog", :boolean, :default => false, :null => false

    end

    create_table "users", :force => true do |t|

      t.column "login", :string, :limit => 30, :default => "", :null => false

      t.column "hashed_password", :string, :limit => 40, :default => "", :null => false

      t.column "firstname", :string, :limit => 30, :default => "", :null => false

      t.column "lastname", :string, :limit => 30, :default => "", :null => false

      t.column "mail", :string, :limit => 60, :default => "", :null => false

      t.column "mail_notification", :boolean, :default => true, :null => false

      t.column "admin", :boolean, :default => false, :null => false

      t.column "status", :integer, :default => 1, :null => false

      t.column "last_login_on", :datetime

      t.column "auth_source_id", :integer

      t.column "created_on", :timestamp

      t.column "updated_on", :timestamp

    end

    create_table "versions", :force => true do |t|

      t.column "project_id", :integer, :default => 0, :null => false

      t.column "name", :string, :limit => 30, :default => "", :null => false

      t.column "description", :string, :default => ""

      t.column "effective_date", :date

      t.column "created_on", :timestamp

      t.column "updated_on", :timestamp

    add_index "versions", ["project_id"], :name => "versions_project_id"

    create_table "workflows", :force => true do |t|

      t.column "tracker_id", :integer, :default => 0, :null => false

      t.column "old_status_id", :integer, :default => 0, :null => false

      t.column "new_status_id", :integer, :default => 0, :null => false

      t.column "role_id", :integer, :default => 0, :null => false

    end

    # project

    Permission.create :controller => "projects", :action => "show", :description => "label_overview", :sort => 100, :is_public => true

    Permission.create :controller => "projects", :action => "changelog", :description => "label_change_log", :sort => 105, :is_public => true

    Permission.create :controller => "reports", :action => "issue_report", :description => "label_report_plural", :sort => 110, :is_public => true

    Permission.create :controller => "projects", :action => "settings", :description => "label_settings", :sort => 150

    Permission.create :controller => "projects", :action => "edit", :description => "button_edit", :sort => 151

    # members

    Permission.create :controller => "projects", :action => "list_members", :description => "button_list", :sort => 200, :is_public => true

    Permission.create :controller => "projects", :action => "add_member", :description => "button_add", :sort => 220

    Permission.create :controller => "members", :action => "edit", :description => "button_edit", :sort => 221

    Permission.create :controller => "members", :action => "destroy", :description => "button_delete", :sort => 222

    # versions

    Permission.create :controller => "projects", :action => "add_version", :description => "button_add", :sort => 320

    Permission.create :controller => "versions", :action => "edit", :description => "button_edit", :sort => 321

    Permission.create :controller => "versions", :action => "destroy", :description => "button_delete", :sort => 322

    # issue categories

    Permission.create :controller => "projects", :action => "add_issue_category", :description => "button_add", :sort => 420

    Permission.create :controller => "issue_categories", :action => "edit", :description => "button_edit", :sort => 421

    Permission.create :controller => "issue_categories", :action => "destroy", :description => "button_delete", :sort => 422

    # issues

    Permission.create :controller => "projects", :action => "list_issues", :description => "button_list", :sort => 1000, :is_public => true

    Permission.create :controller => "issues", :action => "show", :description => "button_view", :sort => 1005, :is_public => true

    Permission.create :controller => "issues", :action => "download", :description => "button_download", :sort => 1010, :is_public => true

    Permission.create :controller => "projects", :action => "add_issue", :description => "button_add", :sort => 1050, :mail_option => 1, :mail_enabled => 1

    Permission.create :controller => "issues", :action => "edit", :description => "button_edit", :sort => 1055

    Permission.create :controller => "issues", :action => "change_status", :description => "label_change_status", :sort => 1060, :mail_option => 1, :mail_enabled => 1

    Permission.create :controller => "issues", :action => "destroy", :description => "button_delete", :sort => 1065

    Permission.create :controller => "issues", :action => "add_attachment", :description => "label_attachment_new", :sort => 1070

    Permission.create :controller => "issues", :action => "destroy_attachment", :description => "label_attachment_delete", :sort => 1075

    # news

    Permission.create :controller => "projects", :action => "list_news", :description => "button_list", :sort => 1100, :is_public => true

    Permission.create :controller => "news", :action => "show", :description => "button_view", :sort => 1101, :is_public => true

    Permission.create :controller => "projects", :action => "add_news", :description => "button_add", :sort => 1120

    Permission.create :controller => "news", :action => "edit", :description => "button_edit", :sort => 1121

    Permission.create :controller => "news", :action => "destroy", :description => "button_delete", :sort => 1122

    Permission.create :controller => "projects", :action => "list_documents", :description => "button_list", :sort => 1200, :is_public => true

    Permission.create :controller => "documents", :action => "show", :description => "button_view", :sort => 1201, :is_public => true

    Permission.create :controller => "documents", :action => "download", :description => "button_download", :sort => 1202, :is_public => true

    Permission.create :controller => "projects", :action => "add_document", :description => "button_add", :sort => 1220

    Permission.create :controller => "documents", :action => "edit", :description => "button_edit", :sort => 1221

    Permission.create :controller => "documents", :action => "destroy", :description => "button_delete", :sort => 1222

    Permission.create :controller => "documents", :action => "add_attachment", :description => "label_attachment_new", :sort => 1223

    Permission.create :controller => "documents", :action => "destroy_attachment", :description => "label_attachment_delete", :sort => 1224

    # files

    Permission.create :controller => "projects", :action => "list_files", :description => "button_list", :sort => 1300, :is_public => true

    Permission.create :controller => "versions", :action => "download", :description => "button_download", :sort => 1301, :is_public => true

    Permission.create :controller => "projects", :action => "add_file", :description => "button_add", :sort => 1320

    Permission.create :controller => "versions", :action => "destroy_file", :description => "button_delete", :sort => 1322

    # create default administrator account

  def self.down

    drop_table :auth_sources

    drop_table :custom_fields

    drop_table :custom_fields_trackers

    drop_table :custom_values

    drop_table :documents

    drop_table :enumerations

    drop_table :issue_categories

    drop_table :issue_histories

    drop_table :issue_statuses

    drop_table :issues

    drop_table :members

    drop_table :news

    drop_table :permissions

    drop_table :permissions_roles

    drop_table :projects

    drop_table :roles

    drop_table :trackers

    drop_table :users

    drop_table :versions

require 'SVG/Graph/Graph'

module SVG

  module Graph

    # === Create presentation quality SVG pie graphs easily

    # 

    # == Synopsis

    # 

    #   require 'SVG/Graph/Pie'

    # 

    #   fields = %w(Jan Feb Mar)

    #   data_sales_02 = [12, 45, 21]

    #   

    #   graph = SVG::Graph::Pie.new({

    #   	:height => 500,

    # 	  :width  => 300,

    # 	  :fields => fields,

    #   })

    #   

    #   graph.add_data({

    #   	:data => data_sales_02,

    # 	  :title => 'Sales 2002',

    #   })

    #   

    #   print "Content-type: image/svg+xml\r\n\r\n"

    #   print graph.burn();

    # 

    # == Description

    # 

    # This object aims to allow you to easily create high quality

    # SVG pie graphs. You can either use the default style sheet

    # or supply your own. Either way there are many options which can

    # be configured to give you control over how the graph is

    # generated - with or without a key, display percent on pie chart,

    # title, subtitle etc.

    #

    # = Examples

    # 

    # http://www.germane-software/repositories/public/SVG/test/single.rb

    # 

    # == See also

    #

    # * SVG::Graph::Graph

    # * SVG::Graph::BarHorizontal

    # * SVG::Graph::Bar

    # * SVG::Graph::Line

    # * SVG::Graph::Plot

    # * SVG::Graph::TimeSeries

    #

    # == Author

    #

    # Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>

    #

    # Copyright 2004 Sean E. Russell

    # This software is available under the Ruby license[LICENSE.txt]

    #

    class Pie < Graph

      # Defaults are those set by Graph::initialize, and

      # [show_shadow] true

      # [shadow_offset] 10

      # [show_data_labels] false

      # [show_actual_values] false

      # [show_percent] true

      # [show_key_data_labels] true

      # [show_key_actual_values] true

      # [show_key_percent] false

      # [expanded] false

      # [expand_greatest] false

      # [expand_gap] 10

      # [show_x_labels] false

      # [show_y_labels] false

      # [datapoint_font_size] 12

      def set_defaults

        init_with(

          :show_shadow		        => true,

          :shadow_offset	        => 10, 

          :show_data_labels	      => false,

          :show_actual_values     => false,

          :show_percent		        => true,

          :show_key_data_labels	  => true,

          :show_key_actual_values => true,

          :show_key_percent		    => false,

          :expanded				        => false,

          :expand_greatest		    => false,

          :expand_gap             => 10,

          :show_x_labels          => false,

          :show_y_labels          => false,

          :datapoint_font_size    => 12

        )

        @data = []

      end

      # Adds a data set to the graph.

      #

      #   graph.add_data( { :data => [1,2,3,4] } )

      #

      # Note that the :title is not necessary.  If multiple

      # data sets are added to the graph, the pie chart will

      # display the +sums+ of the data.  EG:

      #

      #   graph.add_data( { :data => [1,2,3,4] } )

      #   graph.add_data( { :data => [2,3,5,9] } )

      #

      # is the same as:

      #

      #   graph.add_data( { :data => [3,5,8,13] } )

      def add_data arg

        arg[:data].each_index {|idx|

          @data[idx] = 0 unless @data[idx]

          @data[idx] += arg[:data][idx]

        }

      end

      # If true, displays a drop shadow for the chart

      attr_accessor :show_shadow 

      # Sets the offset of the shadow from the pie chart

      attr_accessor :shadow_offset

      # If true, display the data labels on the chart

      attr_accessor :show_data_labels 

      # If true, display the actual field values in the data labels

      attr_accessor :show_actual_values 

      # If true, display the percentage value of each pie wedge in the data

      # labels

      attr_accessor :show_percent

      # If true, display the labels in the key

      attr_accessor :show_key_data_labels 

      # If true, display the actual value of the field in the key

      attr_accessor :show_key_actual_values 

      # If true, display the percentage value of the wedges in the key

      attr_accessor :show_key_percent

      # If true, "explode" the pie (put space between the wedges)

      attr_accessor :expanded 

      # If true, expand the largest pie wedge

      attr_accessor :expand_greatest 

      # The amount of space between expanded wedges

      attr_accessor :expand_gap 

      # The font size of the data point labels

      attr_accessor :datapoint_font_size

      protected

      def add_defs defs

        gradient = defs.add_element( "filter", {

          "id"=>"dropshadow",

          "width" => "1.2",

          "height" => "1.2",

        } )

        gradient.add_element( "feGaussianBlur", {

          "stdDeviation" => "4",

          "result" => "blur"

        })

      end

      # We don't need the graph

      def draw_graph

      end

      def get_y_labels

        [""]

      end

      def get_x_labels

        [""]

      end

      def keys

        total = 0

        max_value = 0

        @data.each {|x| total += x }

        percent_scale = 100.0 / total

        count = -1

        a = @config[:fields].collect{ |x|

          count += 1

          v = @data[count]

          perc = show_key_percent ? " "+(v * percent_scale).round.to_s+"%" : ""

          x + " [" + v.to_s + "]" + perc

        }

      end

      RADIANS = Math::PI/180

      def draw_data

        @graph = @root.add_element( "g" )

        background = @graph.add_element("g")

        midground = @graph.add_element("g")

        diameter = @graph_height > @graph_width ? @graph_width : @graph_height

        diameter -= expand_gap if expanded or expand_greatest

        diameter -= datapoint_font_size if show_data_labels

        diameter -= 10 if show_shadow

        radius = diameter / 2.0

        xoff = (width - diameter) / 2

        yoff = (height - @border_bottom - diameter)

        yoff -= 10 if show_shadow

        @graph.attributes['transform'] = "translate( #{xoff} #{yoff} )"

        wedge_text_pad = 5

        wedge_text_pad = 20 if show_percent and show_data_labels

        total = 0

        max_value = 0

        @data.each {|x| 

          max_value = max_value < x ? x : max_value

          total += x 

        }

        percent_scale = 100.0 / total

        prev_percent = 0

        rad_mult = 3.6 * RADIANS

        @config[:fields].each_index { |count|

          value = @data[count]

          percent = percent_scale * value

          radians = prev_percent * rad_mult

          x_start = radius+(Math.sin(radians) * radius)

          y_start = radius-(Math.cos(radians) * radius)

          radians = (prev_percent+percent) * rad_mult

          x_end = radius+(Math.sin(radians) * radius)

          x_end -= 0.00001 if @data.length == 1

          y_end = radius-(Math.cos(radians) * radius)

          path = "M#{radius},#{radius} L#{x_start},#{y_start} "+

            "A#{radius},#{radius} "+

            "0, #{percent >= 50 ? '1' : '0'},1, "+

            "#{x_end} #{y_end} Z"

          wedge = @foreground.add_element( "path", {

            "d" => path,

            "class" => "fill#{count+1}"

          })

          translate = nil

          tx = 0

          ty = 0

          half_percent = prev_percent + percent / 2

          radians = half_percent * rad_mult

          if show_shadow

            shadow = background.add_element( "path", {

              "d" => path,

              "filter" => "url(#dropshadow)",

              "style" => "fill: #ccc; stroke: none;"

            })

            clear = midground.add_element( "path", {

              "d" => path,

              "style" => "fill: #fff; stroke: none;"

            })

          end

          if expanded or (expand_greatest && value == max_value)

            tx = (Math.sin(radians) * expand_gap)

            ty = -(Math.cos(radians) * expand_gap)

            translate = "translate( #{tx} #{ty} )"

            wedge.attributes["transform"] = translate

            clear.attributes["transform"] = translate if clear

          end

          if show_shadow

            shadow.attributes["transform"] = 

              "translate( #{tx+shadow_offset} #{ty+shadow_offset} )"

          end

          if show_data_labels and value != 0

            label = ""

            label += @config[:fields][count] if show_key_data_labels

            label += " ["+value.to_s+"]" if show_actual_values

            label += " "+percent.round.to_s+"%" if show_percent

            msr = Math.sin(radians)

            mcr = Math.cos(radians)

            tx = radius + (msr * radius)

            ty = radius -(mcr * radius)

            if expanded or (expand_greatest && value == max_value)

              tx += (msr * expand_gap)

              ty -= (mcr * expand_gap)

            end

            @foreground.add_element( "text", {

              "x" => tx.to_s,

              "y" => ty.to_s,

              "class" => "dataPointLabel",

              "style" => "stroke: #fff; stroke-width: 2;"

            }).text = label.to_s

            @foreground.add_element( "text", {

              "x" => tx.to_s,

              "y" => ty.to_s,

              "class" => "dataPointLabel",

            }).text = label.to_s

          end

          prev_percent += percent

        }

      end

      def round val, to

        up = 10**to.to_f

        (val * up).to_i / up

      end

      def get_css

        return <<EOL

.dataPointLabel{

	fill: #000000;

	text-anchor:middle;

	font-size: #{datapoint_font_size}px;

	font-family: "Arial", sans-serif;

	font-weight: normal;

}

/* key - MUST match fill styles */

.key1,.fill1{

	fill: #ff0000;

	fill-opacity: 0.7;

	stroke: none;

	stroke-width: 1px;	

}

.key2,.fill2{

	fill: #0000ff;

	fill-opacity: 0.7;

	stroke: none;

	stroke-width: 1px;	

}

.key3,.fill3{

	fill-opacity: 0.7;

	fill: #00ff00;

	stroke: none;

	stroke-width: 1px;	

}

.key4,.fill4{

	fill-opacity: 0.7;

	fill: #ffcc00;

	stroke: none;

	stroke-width: 1px;	

}

.key5,.fill5{

	fill-opacity: 0.7;

	fill: #00ccff;

	stroke: none;

	stroke-width: 1px;	

}

.key6,.fill6{

	fill-opacity: 0.7;

	fill: #ff00ff;

	stroke: none;

	stroke-width: 1px;	

}

.key7,.fill7{

	fill-opacity: 0.7;

	fill: #00ff99;

	stroke: none;

	stroke-width: 1px;	

}

.key8,.fill8{

	fill-opacity: 0.7;

	fill: #ffff00;

	stroke: none;

	stroke-width: 1px;	

}

.key9,.fill9{

	fill-opacity: 0.7;

	fill: #cc6666;

	stroke: none;

	stroke-width: 1px;	

}

.key10,.fill10{

	fill-opacity: 0.7;

	fill: #663399;

	stroke: none;

	stroke-width: 1px;	

}

.key11,.fill11{

	fill-opacity: 0.7;

	fill: #339900;

	stroke: none;

	stroke-width: 1px;	

}

.key12,.fill12{

	fill-opacity: 0.7;

	fill: #9966FF;

	stroke: none;

	stroke-width: 1px;	

}

EOL

      end

    end

  end

end

require 'rexml/document'

require 'SVG/Graph/BarBase'

module SVG

  module Graph

    # === Create presentation quality SVG horitonzal bar graphs easily

    # 

    # = Synopsis

    # 

    #   require 'SVG/Graph/BarHorizontal'

    #   

    #   fields = %w(Jan Feb Mar)

    #   data_sales_02 = [12, 45, 21]

    #   

    #   graph = SVG::Graph::BarHorizontal.new({

    #     :height => 500,

    #     :width => 300,

    #     :fields => fields,

    #   })

    #   

    #   graph.add_data({

    #     :data => data_sales_02,

    #     :title => 'Sales 2002',

    #   })

    #   

    #   print "Content-type: image/svg+xml\r\n\r\n"

    #   print graph.burn

    # 

    # = Description

    # 

    # This object aims to allow you to easily create high quality

    # SVG horitonzal bar graphs. You can either use the default style sheet

    # or supply your own. Either way there are many options which can

    # be configured to give you control over how the graph is

    # generated - with or without a key, data elements at each point,

    # title, subtitle etc.

    # 

    # = Examples

    # 

    # * http://germane-software.com/repositories/public/SVG/test/test.rb

    # 

    # = See also

    # 

    # * SVG::Graph::Graph

    # * SVG::Graph::Bar

    # * SVG::Graph::Line

    # * SVG::Graph::Pie

    # * SVG::Graph::Plot

    # * SVG::Graph::TimeSeries

    #

    # == Author

    #

    # Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>

    #

    # Copyright 2004 Sean E. Russell

    # This software is available under the Ruby license[LICENSE.txt]

    #

    class BarHorizontal < BarBase

      # In addition to the defaults set in BarBase::set_defaults, sets

      # [rotate_y_labels] true

      # [show_x_guidelines] true

      # [show_y_guidelines] false

      def set_defaults

        super

        init_with( 

          :rotate_y_labels    => true,

          :show_x_guidelines  => true,

          :show_y_guidelines  => false

        )

        self.right_align = self.right_font = 1

      end

      protected

      def get_x_labels

        maxvalue = max_value

        minvalue = min_value

        range = maxvalue - minvalue

        top_pad = range == 0 ? 10 : range / 20.0

        scale_range = (maxvalue + top_pad) - minvalue

        scale_division = scale_divisions || (scale_range / 10.0)

        if scale_integers

          scale_division = scale_division < 1 ? 1 : scale_division.round

        end

        rv = []

        maxvalue = maxvalue%scale_division == 0 ? 

          maxvalue : maxvalue + scale_division

        minvalue.step( maxvalue, scale_division ) {|v| rv << v}

        return rv

      end

      def get_y_labels

        @config[:fields]

      end

      def y_label_offset( height )

        height / -2.0

      end

      def draw_data

        minvalue = min_value

        fieldheight = field_height

        unit_size = (@graph_width.to_f - font_size*2*right_font ) /

                        (get_x_labels.max - get_x_labels.min )

        bargap = bar_gap ? (fieldheight < 10 ? fieldheight / 2 : 10) : 0

        bar_height = fieldheight - bargap

        bar_height /= @data.length if stack == :side