From: "J.Hawkesworth" <J.Hawkesworth@...>
Date: 2003-05-13T19:37:59+09:00
Subject: Re: TK Message box and backquotes issue

I think the long pause might be caused by your cpu utilization going to
100% when Tk starts up.  This is, I believe, a known problem when using
Tk under windows from ruby.  It certainly reduces my machine to treacle.
I recall others mentioning it on the list in the past too.

Of course, the problem may have been fixed but I've missed the thread
annoucing it if it has.

All the best,

Jon


-----Original Message-----
From: Alan [mailto:cs96and@yahoo.co.uk]
Sent: 13 May 2003 11:11
To: ruby-talk ML
Subject: TK Message box and backquotes issue


Hello,

I've discovered a strange bug/feature in ruby.  This is using v1.6.8
on windows.

Basically, if you display a TK message box, and then try to execute a
command using backquotes, you get a very long pause before the
backquotes line is executed.

e.g.

require 'tk'

def msgBox(title, msg, icon='info')
	root = TkRoot.new { withdraw }
	Tk::messageBox('title'=>title, 'message'=>msg, 'icon'=>icon,
'type'=>'ok')
	root.destroy
end

msgBox('Test', 'Here is a message box')
puts "about to run 'start c:\\'"
`start c:\\`

will produce this:
<message box pops up>
<user clicks OK>
about to run 'start c:\'
<long pause - Ctrl-C doesn't work>
<explorer window pops up>

If you replace the backquotes line with:
exec 'explorer.exe', '/n,c:\\'
then it works fine.

Am i doing something wrong, or is this an issue with ruby under
windows?  I don't have linux installed to see if the same thing
happens (you can put any command in the backquotes, it doesn't have to
be 'start')


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