Let me ask the obvious question:  Why not just bind the keypress to the MainWindow? 
#!/usr/bin/perl -w
                                                                      
+          
use strict;
use Tk;
                                                                      
+          
my $mw = 'MainWindow'->new();
                                                                      
+          
my $cv = $mw->Canvas()->pack();
                                                                      
+          
$mw->bind('<KeyPress-a>', sub { print "Ounch!\n" } );
                                                                      
+          
MainLoop();

[download]

Is there really ever a situation where you don't want to invoke the subroutine unless the Canvas is selected?

Although I understand why you'd want to bind, for example, a mouse event to a Canvas, I've never even thought about binding a keypress to a Canvas, as a keypress feels like a more "global" event.

s''(q.S:$/9=(T1';s;(..)(..);$..=substr+crypt($1,$2),2,3;eg;print$..$/

In reply to Re: Perl/Tk CanvasBind question by liverpole
in thread Perl/Tk CanvasBind question by Anonymous Monk

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