1 begin
2 require 'zlib'
3 @@__have_zlib = true
4 rescue
5 @@__have_zlib = false
6 end
7
8 require 'rexml/document'
9
10 module SVG
11 module Graph
12 VERSION = '@ANT_VERSION@'
13
14 # === Base object for generating SVG Graphs
15 #
16 # == Synopsis
17 #
18 # This class is only used as a superclass of specialized charts. Do not
19 # attempt to use this class directly, unless creating a new chart type.
20 #
21 # For examples of how to subclass this class, see the existing specific
22 # subclasses, such as SVG::Graph::Pie.
23 #
24 # == Examples
25 #
26 # For examples of how to use this package, see either the test files, or
27 # the documentation for the specific class you want to use.
28 #
29 # * file:test/plot.rb
30 # * file:test/single.rb
31 # * file:test/test.rb
32 # * file:test/timeseries.rb
33 #
34 # == Description
35 #
36 # This package should be used as a base for creating SVG graphs.
37 #
38 # == Acknowledgements
39 #
40 # Leo Lapworth for creating the SVG::TT::Graph package which this Ruby
41 # port is based on.
42 #
43 # Stephen Morgan for creating the TT template and SVG.
44 #
45 # == See
46 #
47 # * SVG::Graph::BarHorizontal
48 # * SVG::Graph::Bar
49 # * SVG::Graph::Line
50 # * SVG::Graph::Pie
51 # * SVG::Graph::Plot
52 # * SVG::Graph::TimeSeries
53 #
54 # == Author
55 #
56 # Sean E. Russell <serATgermaneHYPHENsoftwareDOTcom>
57 #
58 # Copyright 2004 Sean E. Russell
59 # This software is available under the Ruby license[LICENSE.txt]
60 #
61 class Graph
62 include REXML
63
64 # Initialize the graph object with the graph settings. You won't
65 # instantiate this class directly; see the subclass for options.
66 # [width] 500
67 # [height] 300
68 # [show_x_guidelines] false
69 # [show_y_guidelines] true
70 # [show_data_values] true
71 # [min_scale_value] 0
72 # [show_x_labels] true
73 # [stagger_x_labels] false
74 # [rotate_x_labels] false
75 # [step_x_labels] 1
76 # [step_include_first_x_label] true
77 # [show_y_labels] true
78 # [rotate_y_labels] false
79 # [scale_integers] false
80 # [show_x_title] false
81 # [x_title] 'X Field names'
82 # [show_y_title] false
83 # [y_title_text_direction] :bt
84 # [y_title] 'Y Scale'
85 # [show_graph_title] false
86 # [graph_title] 'Graph Title'
87 # [show_graph_subtitle] false
88 # [graph_subtitle] 'Graph Sub Title'
89 # [key] true,
90 # [key_position] :right, # bottom or righ
91 # [font_size] 12
92 # [title_font_size] 16
93 # [subtitle_font_size] 14
94 # [x_label_font_size] 12
95 # [x_title_font_size] 14
96 # [y_label_font_size] 12
97 # [y_title_font_size] 14
98 # [key_font_size] 10
99 # [no_css] false
100 # [add_popups] false
101 def initialize( config )
102 @config = config
103
104 self.top_align = self.top_font = self.right_align = self.right_font = 0
105
106 init_with({
107 :width => 500,
108 :height => 300,
109 :show_x_guidelines => false,
110 :show_y_guidelines => true,
111 :show_data_values => true,
112
113 # :min_scale_value => 0,
114
115 :show_x_labels => true,
116 :stagger_x_labels => false,
117 :rotate_x_labels => false,
118 :step_x_labels => 1,
119 :step_include_first_x_label => true,
120
121 :show_y_labels => true,
122 :rotate_y_labels => false,
123 :stagger_y_labels => false,
124 :scale_integers => false,
125
126 :show_x_title => false,
127 :x_title => 'X Field names',
128
129 :show_y_title => false,
130 :y_title_text_direction => :bt,
131 :y_title => 'Y Scale',
132
133 :show_graph_title => false,
134 :graph_title => 'Graph Title',
135 :show_graph_subtitle => false,
136 :graph_subtitle => 'Graph Sub Title',
137 :key => true,
138 :key_position => :right, # bottom or right
139
140 :font_size =>12,
141 :title_font_size =>16,
142 :subtitle_font_size =>14,
143 :x_label_font_size =>12,
144 :x_title_font_size =>14,
145 :y_label_font_size =>12,
146 :y_title_font_size =>14,
147 :key_font_size =>10,
148
149 :no_css =>false,
150 :add_popups =>false,
151 })
152
153 set_defaults if respond_to? :set_defaults
154
155 init_with config
156 end
157
158
159 # This method allows you do add data to the graph object.
160 # It can be called several times to add more data sets in.
161 #
162 # data_sales_02 = [12, 45, 21];
163 #
164 # graph.add_data({
165 # :data => data_sales_02,
166 # :title => 'Sales 2002'
167 # })
168 def add_data conf
169 @data = [] unless defined? @data
170
171 if conf[:data] and conf[:data].kind_of? Array
172 @data << conf
173 else
174 raise "No data provided by #{conf.inspect}"
175 end
176 end
177
178
179 # This method removes all data from the object so that you can
180 # reuse it to create a new graph but with the same config options.
181 #
182 # graph.clear_data
183 def clear_data
184 @data = []
185 end
186
187
188 # This method processes the template with the data and
189 # config which has been set and returns the resulting SVG.
190 #
191 # This method will croak unless at least one data set has
192 # been added to the graph object.
193 #
194 # print graph.burn
195 def burn
196 raise "No data available" unless @data.size > 0
197
198 calculations if respond_to? :calculations
199
200 start_svg
201 calculate_graph_dimensions
202 @foreground = Element.new( "g" )
203 draw_graph
204 draw_titles
205 draw_legend
206 draw_data
207 @graph.add_element( @foreground )
208 style
209
210 data = ""
211 @doc.write( data, 0 )
212
213 if @config[:compress]
214 if @@__have_zlib
215 inp, out = IO.pipe
216 gz = Zlib::GzipWriter.new( out )
217 gz.write data
218 gz.close
219 data = inp.read
220 else
221 data << "<!-- Ruby Zlib not available for SVGZ -->";
222 end
223 end
224
225 return data
226 end
227
228
229 # Set the height of the graph box, this is the total height
230 # of the SVG box created - not the graph it self which auto
231 # scales to fix the space.
232 attr_accessor :height
233 # Set the width of the graph box, this is the total width
234 # of the SVG box created - not the graph it self which auto
235 # scales to fix the space.
236 attr_accessor :width
237 # Set the path to an external stylesheet, set to '' if
238 # you want to revert back to using the defaut internal version.
239 #
240 # To create an external stylesheet create a graph using the
241 # default internal version and copy the stylesheet section to
242 # an external file and edit from there.
243 attr_accessor :style_sheet
244 # (Bool) Show the value of each element of data on the graph
245 attr_accessor :show_data_values
246 # The point at which the Y axis starts, defaults to '0',
247 # if set to nil it will default to the minimum data value.
248 attr_accessor :min_scale_value
249 # Whether to show labels on the X axis or not, defaults
250 # to true, set to false if you want to turn them off.
251 attr_accessor :show_x_labels
252 # This puts the X labels at alternative levels so if they
253 # are long field names they will not overlap so easily.
254 # Default it false, to turn on set to true.
255 attr_accessor :stagger_x_labels
256 # This puts the Y labels at alternative levels so if they
257 # are long field names they will not overlap so easily.
258 # Default it false, to turn on set to true.
259 attr_accessor :stagger_y_labels
260 # This turns the X axis labels by 90 degrees.
261 # Default it false, to turn on set to true.
262 attr_accessor :rotate_x_labels
263 # This turns the Y axis labels by 90 degrees.
264 # Default it false, to turn on set to true.
265 attr_accessor :rotate_y_labels
266 # How many "steps" to use between displayed X axis labels,
267 # a step of one means display every label, a step of two results
268 # in every other label being displayed (label <gap> label <gap> label),
269 # a step of three results in every third label being displayed
270 # (label <gap> <gap> label <gap> <gap> label) and so on.
271 attr_accessor :step_x_labels
272 # Whether to (when taking "steps" between X axis labels) step from
273 # the first label (i.e. always include the first label) or step from
274 # the X axis origin (i.e. start with a gap if step_x_labels is greater
275 # than one).
276 attr_accessor :step_include_first_x_label
277 # Whether to show labels on the Y axis or not, defaults
278 # to true, set to false if you want to turn them off.
279 attr_accessor :show_y_labels
280 # Ensures only whole numbers are used as the scale divisions.
281 # Default it false, to turn on set to true. This has no effect if
282 # scale divisions are less than 1.
283 attr_accessor :scale_integers
284 # This defines the gap between markers on the Y axis,
285 # default is a 10th of the max_value, e.g. you will have
286 # 10 markers on the Y axis. NOTE: do not set this too
287 # low - you are limited to 999 markers, after that the
288 # graph won't generate.
289 attr_accessor :scale_divisions
290 # Whether to show the title under the X axis labels,
291 # default is false, set to true to show.
292 attr_accessor :show_x_title
293 # What the title under X axis should be, e.g. 'Months'.
294 attr_accessor :x_title
295 # Whether to show the title under the Y axis labels,
296 # default is false, set to true to show.
297 attr_accessor :show_y_title
298 # Aligns writing mode for Y axis label.
299 # Defaults to :bt (Bottom to Top).
300 # Change to :tb (Top to Bottom) to reverse.
301 attr_accessor :y_title_text_direction
302 # What the title under Y axis should be, e.g. 'Sales in thousands'.
303 attr_accessor :y_title
304 # Whether to show a title on the graph, defaults
305 # to false, set to true to show.
306 attr_accessor :show_graph_title
307 # What the title on the graph should be.
308 attr_accessor :graph_title
309 # Whether to show a subtitle on the graph, defaults
310 # to false, set to true to show.
311 attr_accessor :show_graph_subtitle
312 # What the subtitle on the graph should be.
313 attr_accessor :graph_subtitle
314 # Whether to show a key, defaults to false, set to
315 # true if you want to show it.
316 attr_accessor :key
317 # Where the key should be positioned, defaults to
318 # :right, set to :bottom if you want to move it.
319 attr_accessor :key_position
320 # Set the font size (in points) of the data point labels
321 attr_accessor :font_size
322 # Set the font size of the X axis labels
323 attr_accessor :x_label_font_size
324 # Set the font size of the X axis title
325 attr_accessor :x_title_font_size
326 # Set the font size of the Y axis labels
327 attr_accessor :y_label_font_size
328 # Set the font size of the Y axis title
329 attr_accessor :y_title_font_size
330 # Set the title font size
331 attr_accessor :title_font_size
332 # Set the subtitle font size
333 attr_accessor :subtitle_font_size
334 # Set the key font size
335 attr_accessor :key_font_size
336 # Show guidelines for the X axis
337 attr_accessor :show_x_guidelines
338 # Show guidelines for the Y axis
339 attr_accessor :show_y_guidelines
340 # Do not use CSS if set to true. Many SVG viewers do not support CSS, but
341 # not using CSS can result in larger SVGs as well as making it impossible to
342 # change colors after the chart is generated. Defaults to false.
343 attr_accessor :no_css
344 # Add popups for the data points on some graphs
345 attr_accessor :add_popups
346
347
348 protected
349
350 def sort( *arrys )
351 sort_multiple( arrys )
352 end
353
354 # Overwrite configuration options with supplied options. Used
355 # by subclasses.
356 def init_with config
357 config.each { |key, value|
358 self.send((key.to_s+"=").to_sym, value ) if respond_to? key.to_sym
359 }
360 end
361
362 attr_accessor :top_align, :top_font, :right_align, :right_font
363
364 KEY_BOX_SIZE = 12
365
366 # Override this (and call super) to change the margin to the left
367 # of the plot area. Results in @border_left being set.
368 def calculate_left_margin
369 @border_left = 7
370 # Check for Y labels
371 max_y_label_height_px = rotate_y_labels ?
372 y_label_font_size :
373 get_y_labels.max{|a,b|
374 a.to_s.length<=>b.to_s.length
375 }.to_s.length * y_label_font_size * 0.6
376 @border_left += max_y_label_height_px if show_y_labels
377 @border_left += max_y_label_height_px + 10 if stagger_y_labels
378 @border_left += y_title_font_size + 5 if show_y_title
379 end
380
381
382 # Calculates the width of the widest Y label. This will be the
383 # character height if the Y labels are rotated
384 def max_y_label_width_px
385 return font_size if rotate_y_labels
386 end
387
388
389 # Override this (and call super) to change the margin to the right
390 # of the plot area. Results in @border_right being set.
391 def calculate_right_margin
392 @border_right = 7
393 if key and key_position == :right
394 val = keys.max { |a,b| a.length <=> b.length }
395 @border_right += val.length * key_font_size * 0.6
396 @border_right += KEY_BOX_SIZE
397 @border_right += 10 # Some padding around the box
398 end
399 end
400
401
402 # Override this (and call super) to change the margin to the top
403 # of the plot area. Results in @border_top being set.
404 def calculate_top_margin
405 @border_top = 5
406 @border_top += title_font_size if show_graph_title
407 @border_top += 5
408 @border_top += subtitle_font_size if show_graph_subtitle
409 end
410
411
412 # Adds pop-up point information to a graph.
413 def add_popup( x, y, label )
414 txt_width = label.length * font_size * 0.6 + 10
415 tx = (x+txt_width > width ? x-5 : x+5)
416 t = @foreground.add_element( "text", {
417 "x" => tx.to_s,
418 "y" => (y - font_size).to_s,
419 "visibility" => "hidden",
420 })
421 t.attributes["style"] = "fill: #000; "+
422 (x+txt_width > width ? "text-anchor: end;" : "text-anchor: start;")
423 t.text = label.to_s
424 t.attributes["id"] = t.object_id.to_s
425
426 @foreground.add_element( "circle", {
427 "cx" => x.to_s,
428 "cy" => y.to_s,
429 "r" => "10",
430 "style" => "opacity: 0",
431 "onmouseover" =>
432 "document.getElementById(#{t.object_id}).setAttribute('visibility', 'visible' )",
433 "onmouseout" =>
434 "document.getElementById(#{t.object_id}).setAttribute('visibility', 'hidden' )",
435 })
436
437 end
438
439
440 # Override this (and call super) to change the margin to the bottom
441 # of the plot area. Results in @border_bottom being set.
442 def calculate_bottom_margin
443 @border_bottom = 7
444 if key and key_position == :bottom
445 @border_bottom += @data.size * (font_size + 5)
446 @border_bottom += 10
447 end
448 if show_x_labels
449 max_x_label_height_px = (not rotate_x_labels) ?
450 x_label_font_size :
451 get_x_labels.max{|a,b|
452 a.to_s.length<=>b.to_s.length
453 }.to_s.length * x_label_font_size * 0.6
454 @border_bottom += max_x_label_height_px
455 @border_bottom += max_x_label_height_px + 10 if stagger_x_labels
456 end
457 @border_bottom += x_title_font_size + 5 if show_x_title
458 end
459
460
461 # Draws the background, axis, and labels.
462 def draw_graph
463 @graph = @root.add_element( "g", {
464 "transform" => "translate( #@border_left #@border_top )"
465 })
466
467 # Background
468 @graph.add_element( "rect", {
469 "x" => "0",
470 "y" => "0",
471 "width" => @graph_width.to_s,
472 "height" => @graph_height.to_s,
473 "class" => "graphBackground"
474 })
475
476 # Axis
477 @graph.add_element( "path", {
478 "d" => "M 0 0 v#@graph_height",
479 "class" => "axis",
480 "id" => "xAxis"
481 })
482 @graph.add_element( "path", {
483 "d" => "M 0 #@graph_height h#@graph_width",
484 "class" => "axis",
485 "id" => "yAxis"
486 })
487
488 draw_x_labels
489 draw_y_labels
490 end
491
492
493 # Where in the X area the label is drawn
494 # Centered in the field, should be width/2. Start, 0.
495 def x_label_offset( width )
496 0
497 end
498
499 def make_datapoint_text( x, y, value, style="" )
500 if show_data_values
501 @foreground.add_element( "text", {
502 "x" => x.to_s,
503 "y" => y.to_s,
504 "class" => "dataPointLabel",
505 "style" => "#{style} stroke: #fff; stroke-width: 2;"
506 }).text = value.to_s
507 text = @foreground.add_element( "text", {
508 "x" => x.to_s,
509 "y" => y.to_s,
510 "class" => "dataPointLabel"
511 })
512 text.text = value.to_s
513 text.attributes["style"] = style if style.length > 0
514 end
515 end
516
517
518 # Draws the X axis labels
519 def draw_x_labels
520 stagger = x_label_font_size + 5
521 if show_x_labels
522 label_width = field_width
523
524 count = 0
525 for label in get_x_labels
526 if step_include_first_x_label == true then
527 step = count % step_x_labels
528 else
529 step = (count + 1) % step_x_labels
530 end
531
532 if step == 0 then
533 text = @graph.add_element( "text" )
534 text.attributes["class"] = "xAxisLabels"
535 text.text = label.to_s
536
537 x = count * label_width + x_label_offset( label_width )
538 y = @graph_height + x_label_font_size + 3
539 t = 0 - (font_size / 2)
540
541 if stagger_x_labels and count % 2 == 1
542 y += stagger
543 @graph.add_element( "path", {
544 "d" => "M#{x} #@graph_height v#{stagger}",
545 "class" => "staggerGuideLine"
546 })
547 end
548
549 text.attributes["x"] = x.to_s
550 text.attributes["y"] = y.to_s
551 if rotate_x_labels
552 text.attributes["transform"] =
553 "rotate( 90 #{x} #{y-x_label_font_size} )"+
554 " translate( 0 -#{x_label_font_size/4} )"
555 text.attributes["style"] = "text-anchor: start"
556 else
557 text.attributes["style"] = "text-anchor: middle"
558 end
559 end
560
561 draw_x_guidelines( label_width, count ) if show_x_guidelines
562 count += 1
563 end
564 end
565 end
566
567
568 # Where in the Y area the label is drawn
569 # Centered in the field, should be width/2. Start, 0.
570 def y_label_offset( height )
571 0
572 end
573
574
575 def field_width
576 (@graph_width.to_f - font_size*2*right_font) /
577 (get_x_labels.length - right_align)
578 end
579
580
581 def field_height
582 (@graph_height.to_f - font_size*2*top_font) /
583 (get_y_labels.length - top_align)
584 end
585
586
587 # Draws the Y axis labels
588 def draw_y_labels
589 stagger = y_label_font_size + 5
590 if show_y_labels
591 label_height = field_height
592
593 count = 0
594 y_offset = @graph_height + y_label_offset( label_height )
595 y_offset += font_size/1.2 unless rotate_y_labels
596 for label in get_y_labels
597 y = y_offset - (label_height * count)
598 x = rotate_y_labels ? 0 : -3
599
600 if stagger_y_labels and count % 2 == 1
601 x -= stagger
602 @graph.add_element( "path", {
603 "d" => "M#{x} #{y} h#{stagger}",
604 "class" => "staggerGuideLine"
605 })
606 end
607
608 text = @graph.add_element( "text", {
609 "x" => x.to_s,
610 "y" => y.to_s,
611 "class" => "yAxisLabels"
612 })
613 text.text = label.to_s
614 if rotate_y_labels
615 text.attributes["transform"] = "translate( -#{font_size} 0 ) "+
616 "rotate( 90 #{x} #{y} ) "
617 text.attributes["style"] = "text-anchor: middle"
618 else
619 text.attributes["y"] = (y - (y_label_font_size/2)).to_s
620 text.attributes["style"] = "text-anchor: end"
621 end
622 draw_y_guidelines( label_height, count ) if show_y_guidelines
623 count += 1
624 end
625 end
626 end
627
628
629 # Draws the X axis guidelines
630 def draw_x_guidelines( label_height, count )
631 if count != 0
632 @graph.add_element( "path", {
633 "d" => "M#{label_height*count} 0 v#@graph_height",
634 "class" => "guideLines"
635 })
636 end
637 end
638
639
640 # Draws the Y axis guidelines
641 def draw_y_guidelines( label_height, count )
642 if count != 0
643 @graph.add_element( "path", {
644 "d" => "M0 #{@graph_height-(label_height*count)} h#@graph_width",
645 "class" => "guideLines"
646 })
647 end
648 end
649
650
651 # Draws the graph title and subtitle
652 def draw_titles
653 if show_graph_title
654 @root.add_element( "text", {
655 "x" => (width / 2).to_s,
656 "y" => (title_font_size).to_s,
657 "class" => "mainTitle"
658 }).text = graph_title.to_s
659 end
660
661 if show_graph_subtitle
662 y_subtitle = show_graph_title ?
663 title_font_size + 10 :
664 subtitle_font_size
665 @root.add_element("text", {
666 "x" => (width / 2).to_s,
667 "y" => (y_subtitle).to_s,
668 "class" => "subTitle"
669 }).text = graph_subtitle.to_s
670 end
671
672 if show_x_title
673 y = @graph_height + @border_top + x_title_font_size
674 if show_x_labels
675 y += x_label_font_size + 5 if stagger_x_labels
676 y += x_label_font_size + 5
677 end
678 x = width / 2
679
680 @root.add_element("text", {
681 "x" => x.to_s,
682 "y" => y.to_s,
683 "class" => "xAxisTitle",
684 }).text = x_title.to_s
685 end
686
687 if show_y_title
688 x = y_title_font_size + (y_title_text_direction==:bt ? 3 : -3)
689 y = height / 2
690
691 text = @root.add_element("text", {
692 "x" => x.to_s,
693 "y" => y.to_s,
694 "class" => "yAxisTitle",
695 })
696 text.text = y_title.to_s
697 if y_title_text_direction == :bt
698 text.attributes["transform"] = "rotate( -90, #{x}, #{y} )"
699 else
700 text.attributes["transform"] = "rotate( 90, #{x}, #{y} )"
701 end
702 end
703 end
704
705 def keys
706 return @data.collect{ |d| d[:title] }
707 end
708
709 # Draws the legend on the graph
710 def draw_legend
711 if key
712 group = @root.add_element( "g" )
713
714 key_count = 0
715 for key_name in keys
716 y_offset = (KEY_BOX_SIZE * key_count) + (key_count * 5)
717 group.add_element( "rect", {
718 "x" => 0.to_s,
719 "y" => y_offset.to_s,
720 "width" => KEY_BOX_SIZE.to_s,
721 "height" => KEY_BOX_SIZE.to_s,
722 "class" => "key#{key_count+1}"
723 })
724 group.add_element( "text", {
725 "x" => (KEY_BOX_SIZE + 5).to_s,
726 "y" => (y_offset + KEY_BOX_SIZE).to_s,
727 "class" => "keyText"
728 }).text = key_name.to_s
729 key_count += 1
730 end
731
732 case key_position
733 when :right
734 x_offset = @graph_width + @border_left + 10
735 y_offset = @border_top + 20
736 when :bottom
737 x_offset = @border_left + 20
738 y_offset = @border_top + @graph_height + 5
739 if show_x_labels
740 max_x_label_height_px = (not rotate_x_labels) ?
741 x_label_font_size :
742 get_x_labels.max{|a,b|
743 a.to_s.length<=>b.to_s.length
744 }.to_s.length * x_label_font_size * 0.6
745 x_label_font_size
746 y_offset += max_x_label_height_px
747 y_offset += max_x_label_height_px + 5 if stagger_x_labels
748 end
749 y_offset += x_title_font_size + 5 if show_x_title
750 end
751 group.attributes["transform"] = "translate(#{x_offset} #{y_offset})"
752 end
753 end
754
755
756 private
757
758 def sort_multiple( arrys, lo=0, hi=arrys[0].length-1 )
759 if lo < hi
760 p = partition(arrys,lo,hi)
761 sort_multiple(arrys, lo, p-1)
762 sort_multiple(arrys, p+1, hi)
763 end
764 arrys
765 end
766
767 def partition( arrys, lo, hi )
768 p = arrys[0][lo]
769 l = lo
770 z = lo+1
771 while z <= hi
772 if arrys[0][z] < p
773 l += 1
774 arrys.each { |arry| arry[z], arry[l] = arry[l], arry[z] }
775 end
776 z += 1
777 end
778 arrys.each { |arry| arry[lo], arry[l] = arry[l], arry[lo] }
779 l
780 end
781
782 def style
783 if no_css
784 styles = parse_css
785 @root.elements.each("//*[@class]") { |el|
786 cl = el.attributes["class"]
787 style = styles[cl]
788 style += el.attributes["style"] if el.attributes["style"]
789 el.attributes["style"] = style
790 }
791 end
792 end
793
794 def parse_css
795 css = get_style
796 rv = {}
797 while css =~ /^(\.(\w+)(?:\s*,\s*\.\w+)*)\s*\{/m
798 names_orig = names = $1
799 css = $'
800 css =~ /([^}]+)\}/m
801 content = $1
802 css = $'
803
804 nms = []
805 while names =~ /^\s*,?\s*\.(\w+)/
806 nms << $1
807 names = $'
808 end
809
810 content = content.tr( "\n\t", " ")
811 for name in nms
812 current = rv[name]
813 current = current ? current+"; "+content : content
814 rv[name] = current.strip.squeeze(" ")
815 end
816 end
817 return rv
818 end
819
820
821 # Override and place code to add defs here
822 def add_defs defs
823 end
824
825
826 def start_svg
827 # Base document
828 @doc = Document.new
829 @doc << XMLDecl.new
830 @doc << DocType.new( %q{svg PUBLIC "-//W3C//DTD SVG 1.0//EN" } +
831 %q{"http://www.w3.org/TR/2001/REC-SVG-20010904/DTD/svg10.dtd"} )
832 if style_sheet && style_sheet != ''
833 @doc << Instruction.new( "xml-stylesheet",
834 %Q{href="#{style_sheet}" type="text/css"} )
835 end
836 @root = @doc.add_element( "svg", {
837 "width" => width.to_s,
838 "height" => height.to_s,
839 "viewBox" => "0 0 #{width} #{height}",
840 "xmlns" => "http://www.w3.org/2000/svg",
841 "xmlns:xlink" => "http://www.w3.org/1999/xlink",
842 "xmlns:a3" => "http://ns.adobe.com/AdobeSVGViewerExtensions/3.0/",
843 "a3:scriptImplementation" => "Adobe"
844 })
845 @root << Comment.new( " "+"\\"*66 )
846 @root << Comment.new( " Created with SVG::Graph " )
847 @root << Comment.new( " SVG::Graph by Sean E. Russell " )
848 @root << Comment.new( " Losely based on SVG::TT::Graph for Perl by"+
849 " Leo Lapworth & Stephan Morgan " )
850 @root << Comment.new( " "+"/"*66 )
851
852 defs = @root.add_element( "defs" )
853 add_defs defs
854 if not(style_sheet && style_sheet != '') and !no_css
855 @root << Comment.new(" include default stylesheet if none specified ")
856 style = defs.add_element( "style", {"type"=>"text/css"} )
857 style << CData.new( get_style )
858 end
859
860 @root << Comment.new( "SVG Background" )
861 @root.add_element( "rect", {
862 "width" => width.to_s,
863 "height" => height.to_s,
864 "x" => "0",
865 "y" => "0",
866 "class" => "svgBackground"
867 })
868 end
869
870
871 def calculate_graph_dimensions
872 calculate_left_margin
873 calculate_right_margin
874 calculate_bottom_margin
875 calculate_top_margin
876 @graph_width = width - @border_left - @border_right
877 @graph_height = height - @border_top - @border_bottom
878 end
879
880 def get_style
881 return <<EOL
882 /* Copy from here for external style sheet */
883 .svgBackground{
884 fill:#ffffff;
885 }
886 .graphBackground{
887 fill:#f0f0f0;
888 }
889
890 /* graphs titles */
891 .mainTitle{
892 text-anchor: middle;
893 fill: #000000;
894 font-size: #{title_font_size}px;
895 font-family: "Arial", sans-serif;
896 font-weight: normal;
897 }
898 .subTitle{
899 text-anchor: middle;
900 fill: #999999;
901 font-size: #{subtitle_font_size}px;
902 font-family: "Arial", sans-serif;
903 font-weight: normal;
904 }
905
906 .axis{
907 stroke: #000000;
908 stroke-width: 1px;
909 }
910
911 .guideLines{
912 stroke: #666666;
913 stroke-width: 1px;
914 stroke-dasharray: 5 5;
915 }
916
917 .xAxisLabels{
918 text-anchor: middle;
919 fill: #000000;
920 font-size: #{x_label_font_size}px;
921 font-family: "Arial", sans-serif;
922 font-weight: normal;
923 }
924
925 .yAxisLabels{
926 text-anchor: end;
927 fill: #000000;
928 font-size: #{y_label_font_size}px;
929 font-family: "Arial", sans-serif;
930 font-weight: normal;
931 }
932
933 .xAxisTitle{
934 text-anchor: middle;
935 fill: #ff0000;
936 font-size: #{x_title_font_size}px;
937 font-family: "Arial", sans-serif;
938 font-weight: normal;
939 }
940
941 .yAxisTitle{
942 fill: #ff0000;
943 text-anchor: middle;
944 font-size: #{y_title_font_size}px;
945 font-family: "Arial", sans-serif;
946 font-weight: normal;
947 }
948
949 .dataPointLabel{
950 fill: #000000;
951 text-anchor:middle;
952 font-size: 10px;
953 font-family: "Arial", sans-serif;
954 font-weight: normal;
955 }
956
957 .staggerGuideLine{
958 fill: none;
959 stroke: #000000;
960 stroke-width: 0.5px;
961 }
962
963 #{get_css}
964
965 .keyText{
966 fill: #000000;
967 text-anchor:start;
968 font-size: #{key_font_size}px;
969 font-family: "Arial", sans-serif;
970 font-weight: normal;
971 }
972 /* End copy for external style sheet */
973 EOL
974 end
975
976 end
977 end
978 end
