From: Armin Roehrl <armin@...>
Date: 2001-10-31T07:17:26+09:00
Subject: [ruby-talk:23871] best way to group objects in Ruby-Tk?

Hi,

What is the best way to group objects together?
I want to manipulate a group of lines/circles/text and
move them as if it were a (single) widget.

For example I have rectangles and text in each rectangle.
To move that around I could move the rectangle and the
text, but I would have to code the "interconnection" between
the two items (if I move the rectangle by 20,20 I need to move
the text by 20, 20 and vice versa). Can't Ruby-Tk do that
work for me?

Does Ruby-Tk allow me to "build" a group and
then move the entire group? A bit like moving a background
frame around; moving a sprite around; 

Not speaking Japanese, but searching for TkcWindow I first thought that 
TkcWindow might be the best way todo it as it allows embedding of other
widgets.
http://www2s.biglobe.ne.jp/~Nori/ruby/ja/tk-faq/rtkFAQ-11.html
But I didn't get it to work; Probably I don't know what
TkcWindows are good for;

#!/usr/local/bin/ruby
require 'tk'

class D
  def initialize
    @root = TkRoot.new{ title 'Tk fun' }
    canvas = TkCanvas.new(@root)
    canvas.pack
    win = TkcWindow.new(canvas, 1, 1, {'width'=>200, 'height'=>'200'}) 
    win.pack(canvas) 
    canvas2=TkCanvas.new(win) 
    canvas2.pack
    t=TkcRectangle.new(canvas2, 5, 5,  50,50)
    t.pack(canvas2)
    win.move(100,100) #-> should move the Rectangle, too, but doesn't.
  end
end
  

t=D.new
Tk.mainloop
----

thanks to all for your time,
	Armin

-----------------------------------------------
Armin Roehrl, http://www.approximity.com
"The best way to predict the future is to invent it."
                                          --Alan Kay