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#!/usr/bin/env ruby
require 'tk'
require 'tkextlib/blt'
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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