From: Hidetoshi NAGAI <nagai@...>
Date: 2004-05-24T23:25:40+09:00
Subject: RemoteTkIp support on Ruby/Tk

Hi, 

I committed the library to remote-control Ruby/Tk interpreters 
on the other proesses. The library is one of the application of 
MultiTkIp class, and is constructed from Tcl/Tk's 'send' command. 

# Please don't ask me how to make 'send' command available on 
# your environment. ;-)  Please see the FAQ of Tcl/Tk. 

"New Tcl/Tk 8.5 Features" on the Tcl/Tk web site says
------------------------------------------------------
    * send officially supported on Windows
------------------------------------------------------
So, you may be able to test the library on Windows with Tcl/Tk8.5a1 
(I don't test it on Windows). 

The library 'remote-tk.rb' includes RemoteTkIp class. 
Please see the following sample script. 
It depends on its context that 'TkButton.new()' creates a button 
widget on which Ruby/Tk interpreter. 
------------------------------------------------------
require 'remote-tk'

# start sub-process
ip_name = 'remote_ip'
ip_list = TkWinfo.interps
fork{
  exec "/usr/bin/env ruby -r tk -e \"Tk.appname('#{ip_name}');Tk.mainloop\""
}
sleep 1 until (app = (TkWinfo.interps - ip_list)[0]) && app =~ /^#{ip_name}/
p TkWinfo.interps

# create RemoteTkIp object
ip = RemoteTkIp.new(app)

# setup remote-ip window
btns = []
ip.eval_proc{
  btns << 
    TkButton.new(:command=>proc{
		   puts 'This procesure is on the controller-ip (Ruby-side)'
		 }, 
		 :text=>'print on controller-ip (Ruby-side)').pack(:fill=>:x)

  btns << 
    TkButton.new(:command=>
		   'puts {This procesure is on the remote-ip (Tk-side)}',
		 :text=>'print on remote-ip (Tk-side)').pack(:fill=>:x)

  btns << 
    TkButton.new(:command=>'ruby {
                   puts "This procedure is on the remote-ip (Ruby-side)"
                   p Array.new(3,"ruby")
                 }', 
		 :text=>'ruby cmd on the remote-ip').pack(:fill=>:x)

  TkButton.new(:command=>'exit', :text=>'QUIT').pack(:fill=>:x)
}

# setup controller-ip window
btns.each_with_index{|b, idx|
  TkButton.new(:command=>proc{ip.eval_proc{b.flash}}, 
	       :text=>"flash button-#{idx}", 
	       :padx=>10).pack(:padx=>10, :pady=>2)
}

TkButton.new(:command=>proc{exit}, :text=>'QUIT', 
	     :padx=>10, :pady=>7).pack(:padx=>10, :pady=>7)

# start eventloop
Tk.mainloop
------------------------------------------------------

If you are interested in the library, please get the latest sources
from CVS (1.8.x or 1.9.x) and try it. 
Comments and bug reports are welcome. 
-- 
                                  Hidetoshi NAGAI (nagai@ai.kyutech.ac.jp)