I have no clue what you are trying to do, by destroying your mainwindow. It is possible,and probably easy, to make Tk work fast for editing a bunch of files, but you need to explain in more detail what you need to do.

As to giving you some clues, based on guessing what you want, there is the toplevel window, for creating and removing windows quickly.

#!/usr/bin/perl                                                       
+                    
use Tk;                                                               
+                    
$mw = MainWindow->new;                                                
+                    
$mw->title("MainWindow");                                             
+                    
$mw->Button(-text => "Toplevel", -command => \&do_Toplevel)->pack(  );
+                    
                                                                      
+                    
MainLoop;                                                             
+                    
sub do_Toplevel {                                                     
+                    
  if (! Exists($tl)) {                                                
+                    
    $tl = $mw->Toplevel(  );                                          
+                    
    $tl->title("Toplevel");                                           
+                    
    $tl->Button(-text => "Close",                                     
+                    
                -command => sub { $tl->withdraw })->pack;             
+                    
  } else {                                                            
+                    
    $tl->deiconify(  );                                               
+                    
    $tl->raise(  );                                                   
+                    
  }                                                                   
+                    
}
[download]

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.