From: Sven Bauhan <svenbauhan@...>
Date: 2005-01-28T07:55:53+09:00
Subject: [Ruby/Tk] Cannot close window

Hi,

I'm quite new on Ruby. I tried to use Ruby/Tk to display messages in a
window. But the command on the close button does not work. It returns an
error "NoMethodError: undefinded method'iconify' for nil:NilClass".

How can I do this?
Here is the code:

require 'tk'

class NotifyDialog
 def initialize
  @root = TkRoot.new { title "Notification" }
  TkLabel.new {
   text "Message"
   pack
  }
  TkButton.new {
   text "Close"
   command proc { @root.iconify() }
   pack
  }
 end
end

if $0 == __FILE__
 gui = Thread.new {
  NotifyDialog.new
  Tk.mainloop
 }
 gui.join
 puts "Tk closed. Do something ..."
 sleep( 1 )
 puts "... done."
end

Can anyone teel me whats wrong?

Thanks,
Sven