978 lines
30 KiB
Ruby
978 lines
30 KiB
Ruby
begin
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require 'zlib'
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rescue
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# Zlib not available
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end
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require 'rexml/document'
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module SVG
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module Graph
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VERSION = '@ANT_VERSION@'
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# === Base object for generating SVG Graphs
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#
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# == Synopsis
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#
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# This class is only used as a superclass of specialized charts. Do not
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# attempt to use this class directly, unless creating a new chart type.
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#
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# For examples of how to subclass this class, see the existing specific
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# subclasses, such as SVG::Graph::Pie.
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#
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# == Examples
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#
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# For examples of how to use this package, see either the test files, or
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# the documentation for the specific class you want to use.
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#
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# * file:test/plot.rb
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# * file:test/single.rb
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# * file:test/test.rb
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# * file:test/timeseries.rb
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#
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# == Description
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#
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# This package should be used as a base for creating SVG graphs.
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#
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# == Acknowledgements
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#
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# Leo Lapworth for creating the SVG::TT::Graph package which this Ruby
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# port is based on.
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#
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# Stephen Morgan for creating the TT template and SVG.
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#
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# == See
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#
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# * SVG::Graph::BarHorizontal
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# * SVG::Graph::Bar
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# * SVG::Graph::Line
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# * SVG::Graph::Pie
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# * SVG::Graph::Plot
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# * SVG::Graph::TimeSeries
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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 Graph
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include REXML
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# Initialize the graph object with the graph settings. You won't
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# instantiate this class directly; see the subclass for options.
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# [width] 500
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# [height] 300
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# [show_x_guidelines] false
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# [show_y_guidelines] true
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# [show_data_values] true
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# [min_scale_value] 0
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# [show_x_labels] true
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# [stagger_x_labels] false
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# [rotate_x_labels] false
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# [step_x_labels] 1
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# [step_include_first_x_label] true
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# [show_y_labels] true
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# [rotate_y_labels] false
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# [scale_integers] false
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# [show_x_title] false
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# [x_title] 'X Field names'
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# [show_y_title] false
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# [y_title_text_direction] :bt
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# [y_title] 'Y Scale'
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# [show_graph_title] false
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# [graph_title] 'Graph Title'
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# [show_graph_subtitle] false
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# [graph_subtitle] 'Graph Sub Title'
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# [key] true,
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# [key_position] :right, # bottom or righ
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# [font_size] 12
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# [title_font_size] 16
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# [subtitle_font_size] 14
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# [x_label_font_size] 12
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# [x_title_font_size] 14
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# [y_label_font_size] 12
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# [y_title_font_size] 14
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# [key_font_size] 10
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# [no_css] false
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# [add_popups] false
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def initialize( config )
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@config = config
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self.top_align = self.top_font = self.right_align = self.right_font = 0
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init_with({
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:width => 500,
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:height => 300,
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:show_x_guidelines => false,
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:show_y_guidelines => true,
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:show_data_values => true,
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# :min_scale_value => 0,
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:show_x_labels => true,
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:stagger_x_labels => false,
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:rotate_x_labels => false,
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:step_x_labels => 1,
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:step_include_first_x_label => true,
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:show_y_labels => true,
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:rotate_y_labels => false,
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:stagger_y_labels => false,
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:scale_integers => false,
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:show_x_title => false,
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:x_title => 'X Field names',
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:show_y_title => false,
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:y_title_text_direction => :bt,
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:y_title => 'Y Scale',
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:show_graph_title => false,
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:graph_title => 'Graph Title',
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:show_graph_subtitle => false,
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:graph_subtitle => 'Graph Sub Title',
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:key => true,
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:key_position => :right, # bottom or right
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:font_size =>12,
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:title_font_size =>16,
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:subtitle_font_size =>14,
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:x_label_font_size =>12,
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:x_title_font_size =>14,
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:y_label_font_size =>12,
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:y_title_font_size =>14,
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:key_font_size =>10,
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:no_css =>false,
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:add_popups =>false,
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})
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set_defaults if respond_to? :set_defaults
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init_with config
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end
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# This method allows you do add data to the graph object.
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# It can be called several times to add more data sets in.
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#
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# data_sales_02 = [12, 45, 21];
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#
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# graph.add_data({
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# :data => data_sales_02,
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# :title => 'Sales 2002'
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# })
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def add_data conf
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@data = [] unless defined? @data
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if conf[:data] and conf[:data].kind_of? Array
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@data << conf
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else
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raise "No data provided by #{conf.inspect}"
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end
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end
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# This method removes all data from the object so that you can
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# reuse it to create a new graph but with the same config options.
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#
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# graph.clear_data
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def clear_data
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@data = []
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end
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# This method processes the template with the data and
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# config which has been set and returns the resulting SVG.
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#
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# This method will croak unless at least one data set has
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# been added to the graph object.
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#
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# print graph.burn
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def burn
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raise "No data available" unless @data.size > 0
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calculations if respond_to? :calculations
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start_svg
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calculate_graph_dimensions
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@foreground = Element.new( "g" )
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draw_graph
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draw_titles
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draw_legend
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draw_data
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@graph.add_element( @foreground )
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style
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data = ""
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@doc.write( data, 0 )
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if @config[:compress]
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if Object.const_defined?(:Zlib)
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inp, out = IO.pipe
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gz = Zlib::GzipWriter.new( out )
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gz.write data
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gz.close
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data = inp.read
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else
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data << "<!-- Ruby Zlib not available for SVGZ -->";
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end
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end
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return data
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end
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# Set the height of the graph box, this is the total height
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# of the SVG box created - not the graph it self which auto
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# scales to fix the space.
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attr_accessor :height
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# Set the width of the graph box, this is the total width
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# of the SVG box created - not the graph it self which auto
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# scales to fix the space.
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attr_accessor :width
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# Set the path to an external stylesheet, set to '' if
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# you want to revert back to using the defaut internal version.
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#
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# To create an external stylesheet create a graph using the
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# default internal version and copy the stylesheet section to
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# an external file and edit from there.
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attr_accessor :style_sheet
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# (Bool) Show the value of each element of data on the graph
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attr_accessor :show_data_values
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# The point at which the Y axis starts, defaults to '0',
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# if set to nil it will default to the minimum data value.
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attr_accessor :min_scale_value
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# Whether to show labels on the X axis or not, defaults
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# to true, set to false if you want to turn them off.
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attr_accessor :show_x_labels
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# This puts the X labels at alternative levels so if they
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# are long field names they will not overlap so easily.
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# Default it false, to turn on set to true.
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attr_accessor :stagger_x_labels
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# This puts the Y labels at alternative levels so if they
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# are long field names they will not overlap so easily.
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# Default it false, to turn on set to true.
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attr_accessor :stagger_y_labels
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# This turns the X axis labels by 90 degrees.
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# Default it false, to turn on set to true.
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attr_accessor :rotate_x_labels
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# This turns the Y axis labels by 90 degrees.
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# Default it false, to turn on set to true.
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attr_accessor :rotate_y_labels
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# How many "steps" to use between displayed X axis labels,
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# a step of one means display every label, a step of two results
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# in every other label being displayed (label <gap> label <gap> label),
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# a step of three results in every third label being displayed
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# (label <gap> <gap> label <gap> <gap> label) and so on.
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attr_accessor :step_x_labels
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# Whether to (when taking "steps" between X axis labels) step from
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# the first label (i.e. always include the first label) or step from
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# the X axis origin (i.e. start with a gap if step_x_labels is greater
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# than one).
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attr_accessor :step_include_first_x_label
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# Whether to show labels on the Y axis or not, defaults
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# to true, set to false if you want to turn them off.
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attr_accessor :show_y_labels
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# Ensures only whole numbers are used as the scale divisions.
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# Default it false, to turn on set to true. This has no effect if
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# scale divisions are less than 1.
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attr_accessor :scale_integers
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# This defines the gap between markers on the Y axis,
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# default is a 10th of the max_value, e.g. you will have
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# 10 markers on the Y axis. NOTE: do not set this too
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# low - you are limited to 999 markers, after that the
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# graph won't generate.
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attr_accessor :scale_divisions
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# Whether to show the title under the X axis labels,
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# default is false, set to true to show.
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attr_accessor :show_x_title
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# What the title under X axis should be, e.g. 'Months'.
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attr_accessor :x_title
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# Whether to show the title under the Y axis labels,
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# default is false, set to true to show.
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attr_accessor :show_y_title
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# Aligns writing mode for Y axis label.
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# Defaults to :bt (Bottom to Top).
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# Change to :tb (Top to Bottom) to reverse.
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attr_accessor :y_title_text_direction
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# What the title under Y axis should be, e.g. 'Sales in thousands'.
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attr_accessor :y_title
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# Whether to show a title on the graph, defaults
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# to false, set to true to show.
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attr_accessor :show_graph_title
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# What the title on the graph should be.
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attr_accessor :graph_title
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# Whether to show a subtitle on the graph, defaults
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# to false, set to true to show.
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attr_accessor :show_graph_subtitle
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# What the subtitle on the graph should be.
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attr_accessor :graph_subtitle
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# Whether to show a key, defaults to false, set to
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# true if you want to show it.
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attr_accessor :key
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# Where the key should be positioned, defaults to
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# :right, set to :bottom if you want to move it.
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attr_accessor :key_position
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# Set the font size (in points) of the data point labels
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attr_accessor :font_size
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# Set the font size of the X axis labels
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attr_accessor :x_label_font_size
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# Set the font size of the X axis title
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attr_accessor :x_title_font_size
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# Set the font size of the Y axis labels
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attr_accessor :y_label_font_size
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# Set the font size of the Y axis title
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attr_accessor :y_title_font_size
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# Set the title font size
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attr_accessor :title_font_size
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# Set the subtitle font size
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attr_accessor :subtitle_font_size
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# Set the key font size
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attr_accessor :key_font_size
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# Show guidelines for the X axis
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attr_accessor :show_x_guidelines
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# Show guidelines for the Y axis
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attr_accessor :show_y_guidelines
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# Do not use CSS if set to true. Many SVG viewers do not support CSS, but
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# not using CSS can result in larger SVGs as well as making it impossible to
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# change colors after the chart is generated. Defaults to false.
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attr_accessor :no_css
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# Add popups for the data points on some graphs
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attr_accessor :add_popups
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protected
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def sort( *arrys )
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sort_multiple( arrys )
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end
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# Overwrite configuration options with supplied options. Used
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# by subclasses.
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def init_with config
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config.each { |key, value|
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self.send((key.to_s+"=").to_sym, value ) if respond_to? key.to_sym
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}
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end
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attr_accessor :top_align, :top_font, :right_align, :right_font
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KEY_BOX_SIZE = 12
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# Override this (and call super) to change the margin to the left
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# of the plot area. Results in @border_left being set.
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def calculate_left_margin
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@border_left = 7
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# Check for Y labels
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max_y_label_height_px = rotate_y_labels ?
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y_label_font_size :
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get_y_labels.max{|a,b|
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a.to_s.length<=>b.to_s.length
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}.to_s.length * y_label_font_size * 0.6
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@border_left += max_y_label_height_px if show_y_labels
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@border_left += max_y_label_height_px + 10 if stagger_y_labels
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@border_left += y_title_font_size + 5 if show_y_title
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end
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# Calculates the width of the widest Y label. This will be the
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# character height if the Y labels are rotated
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def max_y_label_width_px
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return font_size if rotate_y_labels
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end
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# Override this (and call super) to change the margin to the right
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# of the plot area. Results in @border_right being set.
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def calculate_right_margin
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@border_right = 7
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if key and key_position == :right
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val = keys.max { |a,b| a.length <=> b.length }
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@border_right += val.length * key_font_size * 0.6
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@border_right += KEY_BOX_SIZE
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@border_right += 10 # Some padding around the box
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end
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end
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# Override this (and call super) to change the margin to the top
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# of the plot area. Results in @border_top being set.
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def calculate_top_margin
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@border_top = 5
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@border_top += title_font_size if show_graph_title
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@border_top += 5
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@border_top += subtitle_font_size if show_graph_subtitle
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end
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# Adds pop-up point information to a graph.
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def add_popup( x, y, label )
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txt_width = label.length * font_size * 0.6 + 10
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tx = (x+txt_width > width ? x-5 : x+5)
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t = @foreground.add_element( "text", {
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"x" => tx.to_s,
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"y" => (y - font_size).to_s,
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"visibility" => "hidden",
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})
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t.attributes["style"] = "fill: #000; "+
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(x+txt_width > width ? "text-anchor: end;" : "text-anchor: start;")
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t.text = label.to_s
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t.attributes["id"] = t.object_id.to_s
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@foreground.add_element( "circle", {
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"cx" => x.to_s,
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"cy" => y.to_s,
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"r" => "10",
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"style" => "opacity: 0",
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"onmouseover" =>
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"document.getElementById(#{t.object_id}).setAttribute('visibility', 'visible' )",
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"onmouseout" =>
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"document.getElementById(#{t.object_id}).setAttribute('visibility', 'hidden' )",
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})
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end
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# Override this (and call super) to change the margin to the bottom
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# of the plot area. Results in @border_bottom being set.
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def calculate_bottom_margin
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@border_bottom = 7
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if key and key_position == :bottom
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@border_bottom += @data.size * (font_size + 5)
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@border_bottom += 10
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end
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if show_x_labels
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max_x_label_height_px = (not rotate_x_labels) ?
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x_label_font_size :
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get_x_labels.max{|a,b|
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a.to_s.length<=>b.to_s.length
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}.to_s.length * x_label_font_size * 0.6
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@border_bottom += max_x_label_height_px
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@border_bottom += max_x_label_height_px + 10 if stagger_x_labels
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end
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@border_bottom += x_title_font_size + 5 if show_x_title
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end
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# Draws the background, axis, and labels.
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def draw_graph
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@graph = @root.add_element( "g", {
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"transform" => "translate( #@border_left #@border_top )"
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})
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# Background
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@graph.add_element( "rect", {
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"x" => "0",
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"y" => "0",
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"width" => @graph_width.to_s,
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"height" => @graph_height.to_s,
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"class" => "graphBackground"
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})
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# Axis
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@graph.add_element( "path", {
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"d" => "M 0 0 v#@graph_height",
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"class" => "axis",
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"id" => "xAxis"
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})
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@graph.add_element( "path", {
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"d" => "M 0 #@graph_height h#@graph_width",
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"class" => "axis",
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"id" => "yAxis"
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})
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draw_x_labels
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draw_y_labels
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end
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# Where in the X area the label is drawn
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# Centered in the field, should be width/2. Start, 0.
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def x_label_offset( width )
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0
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end
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def make_datapoint_text( x, y, value, style="" )
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if show_data_values
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@foreground.add_element( "text", {
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"x" => x.to_s,
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"y" => y.to_s,
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"class" => "dataPointLabel",
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"style" => "#{style} stroke: #fff; stroke-width: 2;"
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}).text = value.to_s
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text = @foreground.add_element( "text", {
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"x" => x.to_s,
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"y" => y.to_s,
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"class" => "dataPointLabel"
|
|
})
|
|
text.text = value.to_s
|
|
text.attributes["style"] = style if style.length > 0
|
|
end
|
|
end
|
|
|
|
|
|
# Draws the X axis labels
|
|
def draw_x_labels
|
|
stagger = x_label_font_size + 5
|
|
if show_x_labels
|
|
label_width = field_width
|
|
|
|
count = 0
|
|
for label in get_x_labels
|
|
if step_include_first_x_label == true then
|
|
step = count % step_x_labels
|
|
else
|
|
step = (count + 1) % step_x_labels
|
|
end
|
|
|
|
if step == 0 then
|
|
text = @graph.add_element( "text" )
|
|
text.attributes["class"] = "xAxisLabels"
|
|
text.text = label.to_s
|
|
|
|
x = count * label_width + x_label_offset( label_width )
|
|
y = @graph_height + x_label_font_size + 3
|
|
t = 0 - (font_size / 2)
|
|
|
|
if stagger_x_labels and count % 2 == 1
|
|
y += stagger
|
|
@graph.add_element( "path", {
|
|
"d" => "M#{x} #@graph_height v#{stagger}",
|
|
"class" => "staggerGuideLine"
|
|
})
|
|
end
|
|
|
|
text.attributes["x"] = x.to_s
|
|
text.attributes["y"] = y.to_s
|
|
if rotate_x_labels
|
|
text.attributes["transform"] =
|
|
"rotate( 90 #{x} #{y-x_label_font_size} )"+
|
|
" translate( 0 -#{x_label_font_size/4} )"
|
|
text.attributes["style"] = "text-anchor: start"
|
|
else
|
|
text.attributes["style"] = "text-anchor: middle"
|
|
end
|
|
end
|
|
|
|
draw_x_guidelines( label_width, count ) if show_x_guidelines
|
|
count += 1
|
|
end
|
|
end
|
|
end
|
|
|
|
|
|
# Where in the Y area the label is drawn
|
|
# Centered in the field, should be width/2. Start, 0.
|
|
def y_label_offset( height )
|
|
0
|
|
end
|
|
|
|
|
|
def field_width
|
|
(@graph_width.to_f - font_size*2*right_font) /
|
|
(get_x_labels.length - right_align)
|
|
end
|
|
|
|
|
|
def field_height
|
|
(@graph_height.to_f - font_size*2*top_font) /
|
|
(get_y_labels.length - top_align)
|
|
end
|
|
|
|
|
|
# Draws the Y axis labels
|
|
def draw_y_labels
|
|
stagger = y_label_font_size + 5
|
|
if show_y_labels
|
|
label_height = field_height
|
|
|
|
count = 0
|
|
y_offset = @graph_height + y_label_offset( label_height )
|
|
y_offset += font_size/1.2 unless rotate_y_labels
|
|
for label in get_y_labels
|
|
y = y_offset - (label_height * count)
|
|
x = rotate_y_labels ? 0 : -3
|
|
|
|
if stagger_y_labels and count % 2 == 1
|
|
x -= stagger
|
|
@graph.add_element( "path", {
|
|
"d" => "M#{x} #{y} h#{stagger}",
|
|
"class" => "staggerGuideLine"
|
|
})
|
|
end
|
|
|
|
text = @graph.add_element( "text", {
|
|
"x" => x.to_s,
|
|
"y" => y.to_s,
|
|
"class" => "yAxisLabels"
|
|
})
|
|
text.text = label.to_s
|
|
if rotate_y_labels
|
|
text.attributes["transform"] = "translate( -#{font_size} 0 ) "+
|
|
"rotate( 90 #{x} #{y} ) "
|
|
text.attributes["style"] = "text-anchor: middle"
|
|
else
|
|
text.attributes["y"] = (y - (y_label_font_size/2)).to_s
|
|
text.attributes["style"] = "text-anchor: end"
|
|
end
|
|
draw_y_guidelines( label_height, count ) if show_y_guidelines
|
|
count += 1
|
|
end
|
|
end
|
|
end
|
|
|
|
|
|
# Draws the X axis guidelines
|
|
def draw_x_guidelines( label_height, count )
|
|
if count != 0
|
|
@graph.add_element( "path", {
|
|
"d" => "M#{label_height*count} 0 v#@graph_height",
|
|
"class" => "guideLines"
|
|
})
|
|
end
|
|
end
|
|
|
|
|
|
# Draws the Y axis guidelines
|
|
def draw_y_guidelines( label_height, count )
|
|
if count != 0
|
|
@graph.add_element( "path", {
|
|
"d" => "M0 #{@graph_height-(label_height*count)} h#@graph_width",
|
|
"class" => "guideLines"
|
|
})
|
|
end
|
|
end
|
|
|
|
|
|
# Draws the graph title and subtitle
|
|
def draw_titles
|
|
if show_graph_title
|
|
@root.add_element( "text", {
|
|
"x" => (width / 2).to_s,
|
|
"y" => (title_font_size).to_s,
|
|
"class" => "mainTitle"
|
|
}).text = graph_title.to_s
|
|
end
|
|
|
|
if show_graph_subtitle
|
|
y_subtitle = show_graph_title ?
|
|
title_font_size + 10 :
|
|
subtitle_font_size
|
|
@root.add_element("text", {
|
|
"x" => (width / 2).to_s,
|
|
"y" => (y_subtitle).to_s,
|
|
"class" => "subTitle"
|
|
}).text = graph_subtitle.to_s
|
|
end
|
|
|
|
if show_x_title
|
|
y = @graph_height + @border_top + x_title_font_size
|
|
if show_x_labels
|
|
y += x_label_font_size + 5 if stagger_x_labels
|
|
y += x_label_font_size + 5
|
|
end
|
|
x = width / 2
|
|
|
|
@root.add_element("text", {
|
|
"x" => x.to_s,
|
|
"y" => y.to_s,
|
|
"class" => "xAxisTitle",
|
|
}).text = x_title.to_s
|
|
end
|
|
|
|
if show_y_title
|
|
x = y_title_font_size + (y_title_text_direction==:bt ? 3 : -3)
|
|
y = height / 2
|
|
|
|
text = @root.add_element("text", {
|
|
"x" => x.to_s,
|
|
"y" => y.to_s,
|
|
"class" => "yAxisTitle",
|
|
})
|
|
text.text = y_title.to_s
|
|
if y_title_text_direction == :bt
|
|
text.attributes["transform"] = "rotate( -90, #{x}, #{y} )"
|
|
else
|
|
text.attributes["transform"] = "rotate( 90, #{x}, #{y} )"
|
|
end
|
|
end
|
|
end
|
|
|
|
def keys
|
|
return @data.collect{ |d| d[:title] }
|
|
end
|
|
|
|
# Draws the legend on the graph
|
|
def draw_legend
|
|
if key
|
|
group = @root.add_element( "g" )
|
|
|
|
key_count = 0
|
|
for key_name in keys
|
|
y_offset = (KEY_BOX_SIZE * key_count) + (key_count * 5)
|
|
group.add_element( "rect", {
|
|
"x" => 0.to_s,
|
|
"y" => y_offset.to_s,
|
|
"width" => KEY_BOX_SIZE.to_s,
|
|
"height" => KEY_BOX_SIZE.to_s,
|
|
"class" => "key#{key_count+1}"
|
|
})
|
|
group.add_element( "text", {
|
|
"x" => (KEY_BOX_SIZE + 5).to_s,
|
|
"y" => (y_offset + KEY_BOX_SIZE).to_s,
|
|
"class" => "keyText"
|
|
}).text = key_name.to_s
|
|
key_count += 1
|
|
end
|
|
|
|
case key_position
|
|
when :right
|
|
x_offset = @graph_width + @border_left + 10
|
|
y_offset = @border_top + 20
|
|
when :bottom
|
|
x_offset = @border_left + 20
|
|
y_offset = @border_top + @graph_height + 5
|
|
if show_x_labels
|
|
max_x_label_height_px = (not rotate_x_labels) ?
|
|
x_label_font_size :
|
|
get_x_labels.max{|a,b|
|
|
a.to_s.length<=>b.to_s.length
|
|
}.to_s.length * x_label_font_size * 0.6
|
|
x_label_font_size
|
|
y_offset += max_x_label_height_px
|
|
y_offset += max_x_label_height_px + 5 if stagger_x_labels
|
|
end
|
|
y_offset += x_title_font_size + 5 if show_x_title
|
|
end
|
|
group.attributes["transform"] = "translate(#{x_offset} #{y_offset})"
|
|
end
|
|
end
|
|
|
|
|
|
private
|
|
|
|
def sort_multiple( arrys, lo=0, hi=arrys[0].length-1 )
|
|
if lo < hi
|
|
p = partition(arrys,lo,hi)
|
|
sort_multiple(arrys, lo, p-1)
|
|
sort_multiple(arrys, p+1, hi)
|
|
end
|
|
arrys
|
|
end
|
|
|
|
def partition( arrys, lo, hi )
|
|
p = arrys[0][lo]
|
|
l = lo
|
|
z = lo+1
|
|
while z <= hi
|
|
if arrys[0][z] < p
|
|
l += 1
|
|
arrys.each { |arry| arry[z], arry[l] = arry[l], arry[z] }
|
|
end
|
|
z += 1
|
|
end
|
|
arrys.each { |arry| arry[lo], arry[l] = arry[l], arry[lo] }
|
|
l
|
|
end
|
|
|
|
def style
|
|
if no_css
|
|
styles = parse_css
|
|
@root.elements.each("//*[@class]") { |el|
|
|
cl = el.attributes["class"]
|
|
style = styles[cl]
|
|
style += el.attributes["style"] if el.attributes["style"]
|
|
el.attributes["style"] = style
|
|
}
|
|
end
|
|
end
|
|
|
|
def parse_css
|
|
css = get_style
|
|
rv = {}
|
|
while css =~ /^(\.(\w+)(?:\s*,\s*\.\w+)*)\s*\{/m
|
|
names_orig = names = $1
|
|
css = $'
|
|
css =~ /([^}]+)\}/m
|
|
content = $1
|
|
css = $'
|
|
|
|
nms = []
|
|
while names =~ /^\s*,?\s*\.(\w+)/
|
|
nms << $1
|
|
names = $'
|
|
end
|
|
|
|
content = content.tr( "\n\t", " ")
|
|
for name in nms
|
|
current = rv[name]
|
|
current = current ? current+"; "+content : content
|
|
rv[name] = current.strip.squeeze(" ")
|
|
end
|
|
end
|
|
return rv
|
|
end
|
|
|
|
|
|
# Override and place code to add defs here
|
|
def add_defs defs
|
|
end
|
|
|
|
|
|
def start_svg
|
|
# Base document
|
|
@doc = Document.new
|
|
@doc << XMLDecl.new
|
|
@doc << DocType.new( %q{svg PUBLIC "-//W3C//DTD SVG 1.0//EN" } +
|
|
%q{"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd"} )
|
|
if style_sheet && style_sheet != ''
|
|
@doc << Instruction.new( "xml-stylesheet",
|
|
%Q{href="#{style_sheet}" type="text/css"} )
|
|
end
|
|
@root = @doc.add_element( "svg", {
|
|
"width" => width.to_s,
|
|
"height" => height.to_s,
|
|
"viewBox" => "0 0 #{width} #{height}",
|
|
"xmlns" => "http://www.w3.org/2000/svg",
|
|
"xmlns:xlink" => "http://www.w3.org/1999/xlink",
|
|
"xmlns:a3" => "http://ns.adobe.com/AdobeSVGViewerExtensions/3.0/",
|
|
"a3:scriptImplementation" => "Adobe"
|
|
})
|
|
@root << Comment.new( " "+"\\"*66 )
|
|
@root << Comment.new( " Created with SVG::Graph " )
|
|
@root << Comment.new( " SVG::Graph by Sean E. Russell " )
|
|
@root << Comment.new( " Losely based on SVG::TT::Graph for Perl by"+
|
|
" Leo Lapworth & Stephan Morgan " )
|
|
@root << Comment.new( " "+"/"*66 )
|
|
|
|
defs = @root.add_element( "defs" )
|
|
add_defs defs
|
|
if not(style_sheet && style_sheet != '') and !no_css
|
|
@root << Comment.new(" include default stylesheet if none specified ")
|
|
style = defs.add_element( "style", {"type"=>"text/css"} )
|
|
style << CData.new( get_style )
|
|
end
|
|
|
|
@root << Comment.new( "SVG Background" )
|
|
@root.add_element( "rect", {
|
|
"width" => width.to_s,
|
|
"height" => height.to_s,
|
|
"x" => "0",
|
|
"y" => "0",
|
|
"class" => "svgBackground"
|
|
})
|
|
end
|
|
|
|
|
|
def calculate_graph_dimensions
|
|
calculate_left_margin
|
|
calculate_right_margin
|
|
calculate_bottom_margin
|
|
calculate_top_margin
|
|
@graph_width = width - @border_left - @border_right
|
|
@graph_height = height - @border_top - @border_bottom
|
|
end
|
|
|
|
def get_style
|
|
return <<EOL
|
|
/* Copy from here for external style sheet */
|
|
.svgBackground{
|
|
fill:#ffffff;
|
|
}
|
|
.graphBackground{
|
|
fill:#f0f0f0;
|
|
}
|
|
|
|
/* graphs titles */
|
|
.mainTitle{
|
|
text-anchor: middle;
|
|
fill: #000000;
|
|
font-size: #{title_font_size}px;
|
|
font-family: "Arial", sans-serif;
|
|
font-weight: normal;
|
|
}
|
|
.subTitle{
|
|
text-anchor: middle;
|
|
fill: #999999;
|
|
font-size: #{subtitle_font_size}px;
|
|
font-family: "Arial", sans-serif;
|
|
font-weight: normal;
|
|
}
|
|
|
|
.axis{
|
|
stroke: #000000;
|
|
stroke-width: 1px;
|
|
}
|
|
|
|
.guideLines{
|
|
stroke: #666666;
|
|
stroke-width: 1px;
|
|
stroke-dasharray: 5 5;
|
|
}
|
|
|
|
.xAxisLabels{
|
|
text-anchor: middle;
|
|
fill: #000000;
|
|
font-size: #{x_label_font_size}px;
|
|
font-family: "Arial", sans-serif;
|
|
font-weight: normal;
|
|
}
|
|
|
|
.yAxisLabels{
|
|
text-anchor: end;
|
|
fill: #000000;
|
|
font-size: #{y_label_font_size}px;
|
|
font-family: "Arial", sans-serif;
|
|
font-weight: normal;
|
|
}
|
|
|
|
.xAxisTitle{
|
|
text-anchor: middle;
|
|
fill: #ff0000;
|
|
font-size: #{x_title_font_size}px;
|
|
font-family: "Arial", sans-serif;
|
|
font-weight: normal;
|
|
}
|
|
|
|
.yAxisTitle{
|
|
fill: #ff0000;
|
|
text-anchor: middle;
|
|
font-size: #{y_title_font_size}px;
|
|
font-family: "Arial", sans-serif;
|
|
font-weight: normal;
|
|
}
|
|
|
|
.dataPointLabel{
|
|
fill: #000000;
|
|
text-anchor:middle;
|
|
font-size: 10px;
|
|
font-family: "Arial", sans-serif;
|
|
font-weight: normal;
|
|
}
|
|
|
|
.staggerGuideLine{
|
|
fill: none;
|
|
stroke: #000000;
|
|
stroke-width: 0.5px;
|
|
}
|
|
|
|
#{get_css}
|
|
|
|
.keyText{
|
|
fill: #000000;
|
|
text-anchor:start;
|
|
font-size: #{key_font_size}px;
|
|
font-family: "Arial", sans-serif;
|
|
font-weight: normal;
|
|
}
|
|
/* End copy for external style sheet */
|
|
EOL
|
|
end
|
|
|
|
end
|
|
end
|
|
end
|