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#!/usr/bin/env ruby
# This script is a re-implementation of tktimer.rb with TkTimer(TkAfter) class.
require "tk"
root = TkRoot.new(:title=>'realtime timer sample')
f1 = TkFrame.new(:borderwidth=>2, :relief=>:ridge)
f1.pack(:side=>:bottom, :fill=>:both)
TkLabel.new(f1, :text=>'use TkTimer (TkAfter) class').pack(:anchor=>:center)
label1 = TkLabel.new(:parent=>f1, :relief=>:raised,
:width=>10).pack(:fill=>:both)
f2 = TkFrame.new(:borderwidth=>2, :relief=>:ridge)
f2.pack(:side=>:bottom, :fill=>:both)
TkLabel.new(f2, :text=>'use TkRTTimer class').pack
label2 = TkLabel.new(:parent=>f2, :relief=>:raised,
:width=>10).pack(:fill=>:both)
TkLabel.new(:text=>'Interval setting of each timer is 10 ms.',
:padx=>10, :pady=>5).pack
# define the procedure repeated by the TkTimer object
tick = proc{|aobj| #<== TkTimer object
cnt = aobj.return_value + 1 # return_value keeps a result of the last proc
label = aobj.current_args[0]
label.text format("%d.%02d", *(cnt.divmod(100)))
cnt #==> return value is kept by TkTimer object
# (so, can be send to the next repeat-proc)
}
timer1 = TkTimer.new(10, -1, [tick, label1]) # 10 ms interval
timer2 = TkRTTimer.new(10, -1, [tick, label2]) # 10 ms interval
timer1.start(0, proc{ label1.text('0.00'); 0 })
timer2.start(0, proc{ label2.text('0.00'); 0 })
b_start = TkButton.new(:text=>'Start', :state=>:disabled) {
pack(:side=>:left, :fill=>:both, :expand=>true)
}
b_stop = TkButton.new(:text=>'Stop', :state=>:normal) {
pack('side'=>'left', 'fill'=>'both', 'expand'=>'yes')
}
b_start.command {
timer1.continue
timer2.continue
b_stop.state(:normal)
b_start.state(:disabled)
}
b_stop.command {
timer1.stop
timer2.stop
b_start.state(:normal)
b_stop.state(:disabled)
}
TkButton.new(:text=>'Reset', :state=>:normal) {
command { timer1.reset; timer2.reset }
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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