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