51 lines
891 B
Ruby
51 lines
891 B
Ruby
#!/usr/bin/env ruby
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# This script generates a counter with start and stop buttons.
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require "tk"
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$label = TkLabel.new {
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text '0.00'
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relief 'raised'
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width 10
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pack('side'=>'bottom', 'fill'=>'both')
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}
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TkButton.new {
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text 'Start'
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command proc {
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if $stopped
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$stopped = FALSE
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tick
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end
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}
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pack('side'=>'left','fill'=>'both','expand'=>'yes')
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}
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TkButton.new {
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text 'Stop'
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command proc{
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exit if $stopped
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$stopped = TRUE
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}
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pack('side'=>'right','fill'=>'both','expand'=>'yes')
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}
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$seconds=0
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$hundredths=0
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$stopped=TRUE
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def tick
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if $stopped then return end
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Tk.after 50, proc{tick}
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$hundredths+=5
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if $hundredths >= 100
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$hundredths=0
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$seconds+=1
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end
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$label.text format("%d.%02d", $seconds, $hundredths)
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end
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root = Tk.root
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root.bind "Control-c", proc{root.destroy}
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root.bind "Control-q", proc{root.destroy}
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Tk.root.focus
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Tk.mainloop
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