Chris@0: require 'rexml/document'
Chris@0: require 'SVG/Graph/Graph'
Chris@0: 
Chris@0: module SVG
Chris@0:   module Graph
Chris@0: 		# = Synopsis
Chris@0: 		#
Chris@0: 		# A superclass for bar-style graphs.  Do not attempt to instantiate
Chris@0: 		# directly; use one of the subclasses instead.
Chris@0: 		#
Chris@0:     # = Author
Chris@0:     #
Chris@0:     # Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>
Chris@0: 		#
Chris@0:     # Copyright 2004 Sean E. Russell
Chris@0: 		# This software is available under the Ruby license[LICENSE.txt]
Chris@0:     #
Chris@0:     class BarBase < SVG::Graph::Graph
Chris@0: 			# Ensures that :fields are provided in the configuration.
Chris@0:       def initialize config
Chris@0:         raise "fields was not supplied or is empty" unless config[:fields] &&
Chris@0:         config[:fields].kind_of?(Array) &&
Chris@0:         config[:fields].length > 0
Chris@0: 				super
Chris@0: 			end
Chris@0: 
Chris@0: 			# In addition to the defaults set in Graph::initialize, sets
Chris@0: 			# [bar_gap] true
Chris@0: 			# [stack] :overlap
Chris@0: 			def set_defaults
Chris@0:         init_with( :bar_gap => true, :stack => :overlap )
Chris@0:       end
Chris@0: 
Chris@0:       #   Whether to have a gap between the bars or not, default
Chris@0:       #   is true, set to false if you don't want gaps.
Chris@0:       attr_accessor :bar_gap
Chris@0:       #   How to stack data sets.  :overlap overlaps bars with
Chris@0:       #   transparent colors, :top stacks bars on top of one another,
Chris@0:       #   :side stacks the bars side-by-side. Defaults to :overlap.
Chris@0:       attr_accessor :stack
Chris@0: 
Chris@0: 
Chris@0: 			protected
Chris@0: 
Chris@0:       def max_value
Chris@0:         @data.collect{|x| x[:data].max}.max
Chris@0:       end
Chris@0: 
Chris@0:       def min_value
Chris@0:         min = 0
Chris@0:         if min_scale_value.nil? 
Chris@0:           min = @data.collect{|x| x[:data].min}.min
Chris@0:           min = min > 0 ? 0 : min
Chris@0:         else
Chris@0:           min = min_scale_value
Chris@0:         end
Chris@0:         return min
Chris@0:       end
Chris@0: 
Chris@0:       def get_css
Chris@0:         return <<EOL
Chris@0: /* default fill styles for multiple datasets (probably only use a single dataset on this graph though) */
Chris@0: .key1,.fill1{
Chris@0: 	fill: #ff0000;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 0.5px;	
Chris@0: }
Chris@0: .key2,.fill2{
Chris@0: 	fill: #0000ff;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 1px;	
Chris@0: }
Chris@0: .key3,.fill3{
Chris@0: 	fill: #00ff00;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 1px;	
Chris@0: }
Chris@0: .key4,.fill4{
Chris@0: 	fill: #ffcc00;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 1px;	
Chris@0: }
Chris@0: .key5,.fill5{
Chris@0: 	fill: #00ccff;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 1px;	
Chris@0: }
Chris@0: .key6,.fill6{
Chris@0: 	fill: #ff00ff;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 1px;	
Chris@0: }
Chris@0: .key7,.fill7{
Chris@0: 	fill: #00ffff;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 1px;	
Chris@0: }
Chris@0: .key8,.fill8{
Chris@0: 	fill: #ffff00;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 1px;	
Chris@0: }
Chris@0: .key9,.fill9{
Chris@0: 	fill: #cc6666;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 1px;	
Chris@0: }
Chris@0: .key10,.fill10{
Chris@0: 	fill: #663399;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 1px;	
Chris@0: }
Chris@0: .key11,.fill11{
Chris@0: 	fill: #339900;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 1px;	
Chris@0: }
Chris@0: .key12,.fill12{
Chris@0: 	fill: #9966FF;
Chris@0: 	fill-opacity: 0.5;
Chris@0: 	stroke: none;
Chris@0: 	stroke-width: 1px;	
Chris@0: }
Chris@0: EOL
Chris@0:       end
Chris@0:     end
Chris@0:   end
Chris@0: end