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#!/usr/bin/env ruby
# This script is a re-implementation of tktimer.rb with TkTimer(TkAfter) class.
require "tk"
label = TkLabel.new(:relief=>:raised, :width=>10) \
.pack(:side=>:bottom, :fill=>:both)
tick = proc{|aobj|
cnt = aobj.return_value + 5
label.text format("%d.%02d", *(cnt.divmod(100)))
cnt
}
timer = TkTimer.new(50, -1, tick).start(0, proc{ label.text('0.00'); 0 })
TkButton.new(:text=>'Start') {
command proc{ timer.continue unless timer.running? }
pack(:side=>:left, :fill=>:both, :expand=>true)
}
TkButton.new(:text=>'Stop') {
command proc{ timer.stop if timer.running? }
pack('side'=>'right','fill'=>'both','expand'=>'yes')
}
ev_quit = TkVirtualEvent.new('Control-c', 'Control-q')
Tk.root.bind(ev_quit, proc{Tk.exit}).focus
Tk.mainloop
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