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             BarBase.rb
        
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             / lib / SVG / Graph / BarBase.rb
          
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      require 'rexml/document'

      require 'SVG/Graph/Graph'

      module SVG

        module Graph

      		# = Synopsis

      		#

      		# A superclass for bar-style graphs.  Do not attempt to instantiate

      		# directly; use one of the subclasses instead.

      		#

          # = Author

          #

          # Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>

      		#

          # Copyright 2004 Sean E. Russell

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

          #

          class BarBase < SVG::Graph::Graph

      			# Ensures that :fields are provided in the configuration.

            def initialize config

              raise "fields was not supplied or is empty" unless config[:fields] &&

              config[:fields].kind_of?(Array) &&

              config[:fields].length > 0

      				super

      			end

      			# In addition to the defaults set in Graph::initialize, sets

      			# [bar_gap] true

      			# [stack] :overlap

      			def set_defaults

              init_with( :bar_gap => true, :stack => :overlap )

            end

            #   Whether to have a gap between the bars or not, default

            #   is true, set to false if you don't want gaps.

            attr_accessor :bar_gap

            #   How to stack data sets.  :overlap overlaps bars with

            #   transparent colors, :top stacks bars on top of one another,

            #   :side stacks the bars side-by-side. Defaults to :overlap.

            attr_accessor :stack

      			protected

            def max_value

              return @data.collect{|x| x[:data].max}.max

            end

            def min_value

              min = 0

              if (min_scale_value.nil? == false) then

                min = min_scale_value

              else

                min = @data.collect{|x| x[:data].min}.min

              end

              return min

            end

            def get_css

              return <<EOL

      /* default fill styles for multiple datasets (probably only use a single dataset on this graph though) */

      .key1,.fill1{

      	fill: #ff0000;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 0.5px;	

      }

      .key2,.fill2{

      	fill: #0000ff;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 1px;	

      }

      .key3,.fill3{

      	fill: #00ff00;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 1px;	

      }

      .key4,.fill4{

      	fill: #ffcc00;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 1px;	

      }

      .key5,.fill5{

      	fill: #00ccff;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 1px;	

      }

      .key6,.fill6{

      	fill: #ff00ff;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 1px;	

      }

      .key7,.fill7{

      	fill: #00ffff;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 1px;	

      }

      .key8,.fill8{

      	fill: #ffff00;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 1px;	

      }

      .key9,.fill9{

      	fill: #cc6666;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 1px;	

      }

      .key10,.fill10{

      	fill: #663399;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 1px;	

      }

      .key11,.fill11{

      	fill: #339900;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 1px;	

      }

      .key12,.fill12{

      	fill: #9966FF;

      	fill-opacity: 0.5;

      	stroke: none;

      	stroke-width: 1px;	

      }

      EOL

            end

          end

        end

      end

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				require 'rexml/document'
				require 'SVG/Graph/Graph'

				module SVG
				module Graph
				# = Synopsis
				#
				# A superclass for bar-style graphs. Do not attempt to instantiate
				# directly; use one of the subclasses instead.
				#
				# = Author
				#
				# Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>
				#
				# Copyright 2004 Sean E. Russell
				# This software is available under the Ruby license[LICENSE.txt]
				#
				class BarBase < SVG::Graph::Graph
				# Ensures that :fields are provided in the configuration.
				def initialize config
				raise "fields was not supplied or is empty" unless config[:fields] &&
				config[:fields].kind_of?(Array) &&
				config[:fields].length > 0
				super
				end

				# In addition to the defaults set in Graph::initialize, sets
				# [bar_gap] true
				# [stack] :overlap
				def set_defaults
				init_with( :bar_gap => true, :stack => :overlap )
				end

				# Whether to have a gap between the bars or not, default
				# is true, set to false if you don't want gaps.
				attr_accessor :bar_gap
				# How to stack data sets. :overlap overlaps bars with
				# transparent colors, :top stacks bars on top of one another,
				# :side stacks the bars side-by-side. Defaults to :overlap.
				attr_accessor :stack


				protected

				def max_value
				return @data.collect{\|x\| x[:data].max}.max
				end

				def min_value
				min = 0

				if (min_scale_value.nil? == false) then
				min = min_scale_value
				else
				min = @data.collect{\|x\| x[:data].min}.min
				end

				return min
				end

				def get_css
				return <<EOL
				/* default fill styles for multiple datasets (probably only use a single dataset on this graph though) */
				.key1,.fill1{
				fill: #ff0000;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 0.5px;
				}
				.key2,.fill2{
				fill: #0000ff;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 1px;
				}
				.key3,.fill3{
				fill: #00ff00;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 1px;
				}
				.key4,.fill4{
				fill: #ffcc00;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 1px;
				}
				.key5,.fill5{
				fill: #00ccff;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 1px;
				}
				.key6,.fill6{
				fill: #ff00ff;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 1px;
				}
				.key7,.fill7{
				fill: #00ffff;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 1px;
				}
				.key8,.fill8{
				fill: #ffff00;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 1px;
				}
				.key9,.fill9{
				fill: #cc6666;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 1px;
				}
				.key10,.fill10{
				fill: #663399;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 1px;
				}
				.key11,.fill11{
				fill: #339900;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 1px;
				}
				.key12,.fill12{
				fill: #9966FF;
				fill-opacity: 0.5;
				stroke: none;
				stroke-width: 1px;
				}
				EOL
				end
				end
				end
				end