From: mgushee@...
Date: 2003-03-11T14:13:09+09:00
Subject: Re: [Q] How to destroy a TkToplevel window

On 11 Mar 2003 at 13:02, Daniel Carrera wrote:

> Actually, just replacing:
> 
> button_quit.bind("ButtonRelease-1")  { dialog.destroy }
> 
> by
> 
> button_quit.configure("command" => Proc.new { dialog.destroy } )
> 
> Works.  I wonder why that is.

Well, I believe in the first case dialog.destroy gets evaluated at 
the time the binding is set. But then you would think that the dialog 
should never get displayed at all. So I'm not quite sure what's going 
on there.

In my experiment, it also seemed to make a difference whether you 
pass the command as an argument to the constructor or in a separate 
call to Button::configure. That shouldn't have any effect on the 
behavior of the command; I've been working with Tk for several years 
in Tcl and Python, and I'm pretty sure it doesn't make a difference 
in either of those languages, so maybe it's a bug in Ruby/Tk. Or 
maybe you have to vary the syntax a little due to some peculiarity of 
blocks in Ruby.

--
Matt Gushee
Englewood, CO USA