From: Kevin Smith <sent@...>
Date: 2000-12-18T10:02:29+09:00
Subject: [ruby-talk:7527] Re: Popping up secondary Tk windows

harryo@zipworld.com.au (Harry Ohlsen) wrote:
>I've written a simple Tk-based GUI using Ruby and, so far, I've been
>able to work out how to do everything I need by reading Tcl and perl
>Tk documentation or from searches on Google.
>
>However, I've now hit a bit of a brick wall.  I have a situation where
>I want to pop up a data entry window at the current cursor location,
>to allow the user to enter a label to associate with an item on the
>screen.
>
>Can someone point me at an example of code that does this in any
>language at all?

I can't copy/paste at the moment (don't ask), but 
here's a paraphrased version of my working ruby 
code. Hopefully I won't put in a stupid typo that 
messes you up. It assumes that the main app has 
already created its own root window.

root = TkRoot.new	# root is a singleton--get it
window = TkToplevel.new(root)
window.title('Compose Message')
label = TkLabel.new(window)
label.text('Tl:')
label.grid('row' => '1', 'column' => '0', 
'sticky' => 'nw') # could use pack instead
to = TkEntry.new(window)
to.grid('row' => '1', 'column' => '1', 'sticky' 
=> 'nsew') # could use pack instead

This is invoked in response to a command, and 
will create a new toplevel window. After this 
code returns, the new window will remain open and 
the main message loop will serve both windows.

Kevin