1#!/usr/bin/env ruby
2require 'tk'
3require 'tkextlib/blt'
4
5file = File.join(File.dirname(File.expand_path(__FILE__)),
6                 'images', 'buckskin.gif')
7bgTexture = TkPhotoImage.new(:file=>file)
8
9TkOption.add('*Graph.Tile', bgTexture)
10TkOption.add('*Label.Tile', bgTexture)
11TkOption.add('*Frame.Tile', bgTexture)
12TkOption.add('*Htext.Tile', bgTexture)
13TkOption.add('*TileOffset', 0)
14TkOption.add('*HighlightThickness',   0)
15TkOption.add('*Element.ScaleSybols',  false)
16TkOption.add('*Element.Smooth',       :linear)
17TkOption.add('*activeLine.Color',     'yellow4')
18TkOption.add('*activeLine.Fill',      'yellow')
19TkOption.add('*activeLine.LineWidth', 0)
20TkOption.add('*Element.Pixels',       3)
21TkOption.add('*Graph.halo',           '7i')
22
23if Tk.root.winfo_screenvisual != 'staticgray'
24  TkOption.add('*print.background', 'yellow')
25  TkOption.add('*quit.background',  'red')
26end
27
28length = 250000
29graph = Tk::BLT::Graph.new(:title=>"Scatter Plot\n#{length} points")
30graph.xaxis_configure(:loose=>false, :title=>'X Axis Label')
31graph.yaxis_configure(:title=>'Y Axis Label')
32graph.legend_configure(:activerelief=>:sunken, :background=>'')
33
34Tk::BLT::Table.add(Tk.root, graph, [0,0], :fill=>:both)
35
36v_x = Tk::BLT::Vector.new(length)
37v_y = Tk::BLT::Vector.new(length)
38v_x.expr("random(#{v_x})")
39v_y.expr("random(#{v_y})")
40v_x.sort(v_y)
41
42plot = Tk::BLT::PlotComponent::Element.new(graph, :symbol=>:square,
43                                           :color=>'green4', :fill=>'green2',
44                                           :linewidth=>0, :outlinewidth=>1,
45                                           :pixels=>4, :label=>'plot',
46                                           :xdata=>v_x, :ydata=>v_y)
47
48Tk.root.minsize(0, 0)
49
50#graph.zoom_stack
51#graph.crosshairs
52#graph.active_legend
53#graph.closest_point
54Tk::BLT.zoom_stack(graph)
55Tk::BLT.crosshairs(graph)
56Tk::BLT.active_legend(graph)
57Tk::BLT.closest_point(graph)
58
59Tk::BLT::Busy.hold(graph)
60Tk.update
61Tk::BLT::Busy.release(graph)
62
63Tk.mainloop
64