That would explain why my debugger shows the results of $mw-> toplevel(), as
being a blessed reference to Tk::MainWindow (instead of perhaps a
Tk::Toplevel ).

But, you can have multiple MainWindow(s) per script, so MainWindow must be
more than just the first TopLevel in my program...

----- Original Message -----
From: "Ala Qumsieh" <qumsieh@[...].ca> 
To: "Tim Harsch" <harsch1@[...].gov> 
Cc: "PTK" <ptk@[...].EDU> ; "Michael van Nieuwenhuize"
<michaelv@[...].com> 
Sent: Thursday, May 08, 2003 2:46 PM
Subject: Re: example from Mastering Perl/Tk (correction)


>  On Thu, 8 May 2003, Tim Harsch wrote:
> 
>  > This whole MainWindow, frame, TopLevel thing confuses me.  I'm still not
>  > solid on what the real differences between them are...
> 
>  Think of them this way.
>  Frame is the base widget. It is just an empty window with no
>  decorations. Toplevel is a frame with window decorations that
>  makes it visible to your desktop manager[*]. MainWindow is just a special
>  instance of Toplevel; it's simply the first Toplevel in your program.
> 
>  --Ala
> 
>  [*] There are cases when this is not true, for example when you set
>  overrideredirect(1), and when using -use() and -container().
> 
> 

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