From: Hidetoshi NAGAI <nagai@...>
Date: 2006-02-24T00:10:46+09:00
Subject: Re: Ruby/Tk : Accessing a Checkbox

From: dperkins@frii.com
Subject: Re: Ruby/Tk : Accessing a Checkbox
Date: Thu, 23 Feb 2006 23:19:18 +0900
Message-ID: <1311.63.77.210.130.1140704341.squirrel@users.frii.com>
> You need a TkVariable associated with the checkbutton.
> 
> var = TkVariable.new
> 
> $pbmto_check = TkCheckButton.new(pbmto_frame) do
>     variable var
>     pack
> end

Latest Ruby/Tk supports a default variable of a checkbutton.
So, you don't need define a TkVariable. For example, 
-------------------------------------------------------------
irb(main):002:0> $pbmto_check = TkCheckButton.new(pbmto_frame)
=> #<TkCheckButton:0xb7c48a8c @path=".w00000.w00001">
irb(main):003:0> $pbmto_check.get_value
=> "0"
irb(main):004:0> $pbmto_check.set_value(1)
=> "1"
irb(main):005:0> $pbmto_check.get_value
=> "1"
irb(main):006:0> $pbmto_check.variable
=> #<TkVariable: w00001>
irb(main):007:0> $pbmto_check.variable.value
=> "1"
irb(main):008:0> TkUtil.bool($pbmto_check.get_value)
=> true
irb(main):009:0> $pbmto_check.variable.bool
=> true
irb(main):010:0> $pbmto_check.variable.value = 0
=> 0
irb(main):011:0> $pbmto_check.get_value
=> "0"
irb(main):012:0> TkUtil.bool($pbmto_check.get_value)
=> false
irb(main):013:0> $pbmto_check.variable.value
=> "0"
irb(main):014:0> $pbmto_check.variable.bool
=> false
irb(main):015:0> $pbmto_check.variable.numeric
=> 0
-------------------------------------------------------------
-- 
Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)