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#!/usr/bin/env ruby
require 'tk'
require 'tkextlib/blt'
file = File.join(File.dirname(File.expand_path(__FILE__)),
'images', 'buckskin.gif')
bgTexture = TkPhotoImage.new(:file=>file)
TkOption.add('*Graph.Tile', bgTexture)
TkOption.add('*Label.Tile', bgTexture)
TkOption.add('*Frame.Tile', bgTexture)
TkOption.add('*Htext.Tile', bgTexture)
TkOption.add('*TileOffset', 0)
TkOption.add('*HighlightThickness', 0)
TkOption.add('*Element.ScaleSybols', false)
TkOption.add('*Element.Smooth', :linear)
TkOption.add('*activeLine.Color', 'yellow4')
TkOption.add('*activeLine.Fill', 'yellow')
TkOption.add('*activeLine.LineWidth', 0)
TkOption.add('*Element.Pixels', 3)
TkOption.add('*Graph.halo', '7i')
if Tk.root.winfo_screenvisual != 'staticgray'
TkOption.add('*print.background', 'yellow')
TkOption.add('*quit.background', 'red')
end
length = 250000
graph = Tk::BLT::Graph.new(:title=>"Scatter Plot\n#{length} points")
graph.xaxis_configure(:loose=>false, :title=>'X Axis Label')
graph.yaxis_configure(:title=>'Y Axis Label')
graph.legend_configure(:activerelief=>:sunken, :background=>'')
Tk::BLT::Table.add(Tk.root, graph, [0,0], :fill=>:both)
v_x = Tk::BLT::Vector.new(length)
v_y = Tk::BLT::Vector.new(length)
v_x.expr("random(#{v_x})")
v_y.expr("random(#{v_y})")
v_x.sort(v_y)
plot = Tk::BLT::PlotComponent::Element.new(graph, :symbol=>:square,
:color=>'green4', :fill=>'green2',
:linewidth=>0, :outlinewidth=>1,
:pixels=>4, :label=>'plot',
:xdata=>v_x, :ydata=>v_y)
Tk.root.minsize(0, 0)
#graph.zoom_stack
#graph.crosshairs
#graph.active_legend
#graph.closest_point
Tk::BLT.zoom_stack(graph)
Tk::BLT.crosshairs(graph)
Tk::BLT.active_legend(graph)
Tk::BLT.closest_point(graph)
Tk::BLT::Busy.hold(graph)
Tk.update
Tk::BLT::Busy.release(graph)
Tk.mainloop
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