44 lines
1.5 KiB
Ruby
44 lines
1.5 KiB
Ruby
#!/usr/bin/env ruby
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# This script is a re-implementation of tktimer.rb with TkTimer(TkAfter) class.
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require "tk"
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# new notation :
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# * symbols are acceptable as keys or values of the option hash
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# * the parent widget can be given by :parent key on the option hash
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root = TkRoot.new(:title=>'timer sample')
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label = TkLabel.new(:parent=>root, :relief=>:raised, :width=>10) \
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.pack(:side=>:bottom, :fill=>:both)
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# define the procedure repeated by the TkTimer object
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tick = proc{|aobj| #<== TkTimer object
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cnt = aobj.return_value + 5 # return_value keeps a result of the last proc
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label.text format("%d.%02d", *(cnt.divmod(100)))
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cnt #==> return value is kept by TkTimer object
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# (so, can be send to the next repeat-proc)
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}
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timer = TkTimer.new(50, -1, tick).start(0, proc{ label.text('0.00'); 0 })
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# ==> repeat-interval : (about) 50 ms,
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# repeat : infinite (-1) times,
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# repeat-procedure : tick (only one, in this case)
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#
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# ==> wait-before-call-init-proc : 0 ms,
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# init_proc : proc{ label.text('0.00'); 0 }
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#
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# (0ms)-> init_proc ->(50ms)-> tick ->(50ms)-> tick ->....
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TkButton.new(:text=>'Start') {
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command proc{ timer.continue unless timer.running? }
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pack(:side=>:left, :fill=>:both, :expand=>true)
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}
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TkButton.new(:text=>'Stop') {
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command proc{ timer.stop if timer.running? }
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pack('side'=>'right','fill'=>'both','expand'=>'yes')
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}
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ev_quit = TkVirtualEvent.new('Control-c', 'Control-q')
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Tk.root.bind(ev_quit, proc{Tk.exit}).focus
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Tk.mainloop
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