Class | SVG::Graph::Schedule |
In: |
lib/SVG/Graph/Schedule.rb
|
Parent: | Graph |
require 'SVG/Graph/Schedule' # Data sets are label, start, end tripples. data1 = [ "Housesitting", "6/17/04", "6/19/04", "Summer Session", "6/15/04", "8/15/04", ] graph = SVG::Graph::Schedule.new( { :width => 640, :height => 480, :graph_title => title, :show_graph_title => true, :no_css => true, :scale_x_integers => true, :scale_y_integers => true, :min_x_value => 0, :min_y_value => 0, :show_data_labels => true, :show_x_guidelines => true, :show_x_title => true, :x_title => "Time", :stagger_x_labels => true, :stagger_y_labels => true, :x_label_format => "%m/%d/%y", }) graph.add_data({ :data => data1, :title => 'Data', }) print graph.burn()
Produces a graph of temporal scalar data.
www.germane-software/repositories/public/SVG/test/schedule.rb
The default stylesheet handles upto 10 data sets, if you use more you must create your own stylesheet and add the additional settings for the extra data sets. You will know if you go over 10 data sets as they will have no style and be in black.
Note that multiple data sets within the same chart can differ in length, and that the data in the datasets needn‘t be in order; they will be ordered by the plot along the X-axis.
The dates must be parseable by ParseDate, but otherwise can be any order of magnitude (seconds within the hour, or years)
Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>
Copyright 2004 Sean E. Russell This software is available under the Ruby license
bar_gap | [RW] | |
min_x_value | [RW] | |
popup_format | [RW] | The formatting used for the popups. See x_label_format |
scale_x_divisions | [RW] | |
scale_x_integers | [RW] | |
timescale_divisions | [RW] |
Use this to set the spacing between dates on the axis. The value must be of
the form "\d+ ?(days|weeks|months|years|hours|minutes|seconds)?"
EG: graph.timescale_divisions = "2 weeks" will cause the chart to try to divide the X axis up into segments of two week periods. |
x_label_format | [RW] | The format string use do format the X axis labels. See Time::strformat |
Add data to the plot.
# A data set with 1 point: Lunch from 12:30 to 14:00 d1 = [ "Lunch", "12:30", "14:00" ] # A data set with 2 points: "Cats" runs from 5/11/03 to 7/15/04, and # "Henry V" runs from 6/12/03 to 8/20/03 d2 = [ "Cats", "5/11/03", "7/15/04", "Henry V", "6/12/03", "8/20/03" ] graph.add_data( :data => d1, :title => 'Meetings' ) graph.add_data( :data => d2, :title => 'Plays' )
Note that the data must be in time,value pairs, and that the date format may be any date that is parseable by ParseDate. Also note that, in this example, we‘re mixing scales; the data from d1 will probably not be discernable if both data sets are plotted on the same graph, since d1 is too granular.
# File lib/SVG/Graph/Schedule.rb, line 146 146: def add_data data 147: @data = [] unless @data 148: 149: raise "No data provided by #{conf.inspect}" unless data[:data] and 150: data[:data].kind_of? Array 151: raise "Data supplied must be title,from,to tripples! "+ 152: "The data provided contained an odd set of "+ 153: "data points" unless data[:data].length % 3 == 0 154: return if data[:data].length == 0 155: 156: 157: y = [] 158: x_start = [] 159: x_end = [] 160: data[:data].each_index {|i| 161: im3 = i%3 162: if im3 == 0 163: y << data[:data][i] 164: else 165: if TIME_PARSE_AVAIL then 166: arr = DateTime.parse(data[:data][i]) 167: t = arr.to_time 168: else 169: arr = ParseDate.parsedate( data[:data][i] ) 170: t = Time.local( *arr[0,6].compact ) 171: end 172: (im3 == 1 ? x_start : x_end) << t.to_i 173: end 174: } 175: sort( x_start, x_end, y ) 176: @data = [x_start, x_end, y ] 177: end
In addition to the defaults set by Graph::initialize and Plot::set_defaults, sets:
# File lib/SVG/Graph/Schedule.rb, line 92 92: def set_defaults 93: init_with( 94: :x_label_format => '%Y-%m-%d %H:%M:%S', 95: :popup_format => '%Y-%m-%d %H:%M:%S', 96: :scale_x_divisions => false, 97: :scale_x_integers => false, 98: :bar_gap => true 99: ) 100: end
# File lib/SVG/Graph/Schedule.rb, line 210 210: def draw_data 211: fieldheight = field_height 212: fieldwidth = field_width 213: 214: bargap = bar_gap ? (fieldheight < 10 ? fieldheight / 2 : 10) : 0 215: subbar_height = fieldheight - bargap 216: 217: field_count = 1 218: y_mod = (subbar_height / 2) + (font_size / 2) 219: min,max,div = x_range 220: scale = (@graph_width.to_f - font_size*2) / (max-min) 221: @data[0].each_index { |i| 222: x_start = @data[0][i] 223: x_end = @data[1][i] 224: y = @graph_height - (fieldheight * field_count) 225: bar_width = (x_end-x_start) * scale 226: bar_start = x_start * scale - (min * scale) 227: 228: @graph.add_element( "rect", { 229: "x" => bar_start.to_s, 230: "y" => y.to_s, 231: "width" => bar_width.to_s, 232: "height" => subbar_height.to_s, 233: "class" => "fill#{field_count+1}" 234: }) 235: field_count += 1 236: } 237: end
# File lib/SVG/Graph/Schedule.rb, line 194 194: def format x, y 195: Time.at( x ).strftime( popup_format ) 196: end
# File lib/SVG/Graph/Schedule.rb, line 239 239: def get_css 240: return "/* default fill styles for multiple datasets (probably only use a single dataset on this graph though) */\n.key1,.fill1{\n fill: #ff0000;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 0.5px; \n}\n.key2,.fill2{\n fill: #0000ff;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 1px; \n}\n.key3,.fill3{\n fill: #00ff00;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 1px; \n}\n.key4,.fill4{\n fill: #ffcc00;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 1px; \n}\n.key5,.fill5{\n fill: #00ccff;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 1px; \n}\n.key6,.fill6{\n fill: #ff00ff;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 1px; \n}\n.key7,.fill7{\n fill: #00ffff;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 1px; \n}\n.key8,.fill8{\n fill: #ffff00;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 1px; \n}\n.key9,.fill9{\n fill: #cc6666;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 1px; \n}\n.key10,.fill10{\n fill: #663399;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 1px; \n}\n.key11,.fill11{\n fill: #339900;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 1px; \n}\n.key12,.fill12{\n fill: #9966FF;\n fill-opacity: 0.5;\n stroke: none;\n stroke-width: 1px; \n}\n" 241: end
# File lib/SVG/Graph/Schedule.rb, line 198 198: def get_x_labels 199: rv = get_x_values.collect { |v| Time.at(v).strftime( x_label_format ) } 200: end
# File lib/SVG/Graph/Schedule.rb, line 182 182: def min_x_value=(value) 183: if TIME_PARSE_AVAIL then 184: arr = Time.parse(value) 185: t = arr.to_time 186: else 187: arr = ParseDate.parsedate( value ) 188: t = Time.local( *arr[0,6].compact ) 189: end 190: @min_x_value = t.to_i 191: end