From: nagai@...
Date: 2002-07-12T12:51:17+09:00
Subject: Re: Ruby/Tk, TkMessage

Hi, 

From: katiedhe@hotmail.com (Dandan He)
Subject: Ruby/Tk, TkMessage
Date: Tue, 9 Jul 2002 14:45:48 +0900
Message-ID: <5d85b7fe.0207082127.3f806f76@posting.google.com>
> I need to use a Ruby/Tk widget to display some read-only information,
> which can be multi-line. I need the widget to be displayed as a
> certain size (say, width=100, height=50) even when it doesn't have any
> text in it. I would use TkText if there is a way to make it read-only.

Use a frame widget with fixed size. 
If you want to use Pack geometry manager only, 
you must do TkPack.propagate(<frame widget>, false) 
to block the propagation of size. 
For example, 
-------------------------------------
require 'tk'
f = TkFrame.new(nil, 'width'=>100, 'height'=>50).pack
TkPack.propagate(f,false)
TkMessage.new(f, 'text'=>'1111111111222222222233333333334444444444555555555566666666667777777777888888888899999999990000000000').pack
Tk.mainloop
-------------------------------------
As you see when you run it, 
the center part of the message widget is shown. 
But if you want to show upper-left corner of the message widget, 
probably you must use Place geometry manager. 
For example, 
-------------------------------------
require 'tk'
f = TkFrame.new(nil, 'width'=>100, 'height'=>50).pack
TkMessage.new(f, 'text'=>'1111111111222222222233333333334444444444555555555566666666667777777777888888888899999999990000000000').place('x'=>0, 'y'=>0)
Tk.mainloop
-------------------------------------
In this case, no need TkPack.propagate. 
The message widget has no influence on the frame widget, 
because the message widget is not known by Pack geometry manager. 
-- 
                                  Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)