48 lines
921 B
Ruby
48 lines
921 B
Ruby
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require "tkclass"
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$tkline_init = FALSE
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def start_random
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return if $tkline_init
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$tkline_init = TRUE
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if defined? Thread
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Thread.start do
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loop do
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sleep 2
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Line.new($c, rand(400), rand(200), rand(400), rand(200))
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end
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end
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end
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end
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Label.new('text'=>'Please press or drag button-1').pack
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$c = Canvas.new
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$c.pack
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$start_x = start_y = 0
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def do_press(x, y)
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$start_x = x
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$start_y = y
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$current_line = Line.new($c, x, y, x, y)
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start_random
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end
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def do_motion(x, y)
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if $current_line
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$current_line.coords $start_x, $start_y, x, y
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end
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end
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def do_release(x, y)
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if $current_line
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$current_line.coords $start_x, $start_y, x, y
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$current_line.fill 'black'
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$current_line = nil
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end
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end
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$c.bind("1", proc{|e| do_press e.x, e.y})
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$c.bind("B1-Motion", proc{|x, y| do_motion x, y}, "%x %y")
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$c.bind("ButtonRelease-1", proc{|x, y| do_release x, y}, "%x %y")
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Tk.mainloop
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