From: dperkins@...
Date: 2006-02-23T23:19:18+09:00
Subject: Re: Ruby/Tk : Accessing a Checkbox

> How can I find out whether a Checkbox is checked or unchecked in Ruby?
>
> Here is my Checkbox definition (hope it is correct):
>
>   $bpmto_check=TkCheckButton.new(bpmto_frame);
>
> How can I find the state of the checkbox? I tried the .value
> member (like in the entry field), but this is not defined
> for checkboxes.
>
> I have searched several tutorials on Ruby/Tk, but did not find
> one which covers checkboxes. Is there a reference manual
> available, or man pages, which covers the Tk extensions of Ruby?
>
> Ronald

You need a TkVariable associated with the checkbutton.

var = TkVariable.new

$pbmto_check = TkCheckButton.new(pbmto_frame) do
    variable var
    pack
end