From: nagai@...
Date: 2003-03-11T13:46:22+09:00
Subject: Re: Ruby/Tk :: Root window backgrounds?

Hi, 

From: kryptik@usa.com
Subject: Ruby/Tk :: Root window backgrounds?
Date: Sun, 9 Mar 2003 17:57:02 +0900
Message-ID: <20030309085657.60426.qmail@mail.com>
> Is there a way to set a background img or color to your root window? 
> I would like to use a img or color to give my app a desktop like feel. 
> Is it possible, or is this something tk is lacking?

Well, maybe need a little tricky way. 
The way is to use two geometry manager on same widget. 
For example, 
----------------------------------------------------
require 'tk'
image = TkPhotoImage.new('file'=>'background.gif', 'height'=>200, 'width'=>200)
root = TkRoot.new
TkLabel.new(root, 'image'=>image).place('in'=>root, 
                                        'relheight'=>1.0, 'relwidth'=>1.0)
TkButton.new(root, 'text'=>'TOP').pack('side'=>'top')
TkButton.new(root, 'text'=>'BOTTOM').pack('side'=>'bottom')
Tk.mainloop
----------------------------------------------------
Each of Place and Pack geometry manager doesn't know other 
geometry manager. So Pack geometry manager has no attention 
to existence of the label widget with the image controlled 
by Place geometry manager. 
-- 
                                  Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)