#!/usr/bin/perl --
use strict;
use warnings;
use Tk;
my $mw = tkinit;
$mw->Label( -text => "yo" )->pack;
my $en = $mw->Entry( -text => "yo" )->pack;
my $bb = $mw->Button( -command => \&warner )->pack;

BuhBind( $mw, '<Enter>' ); ## mouse enter
BuhBind( $en, '<Enter>' ); ## mouse enter
BuhBind( $mw, '<KeyPress-Return>' ); 
BuhBind( $en, '<KeyPress-Return>' );

## $mw->WidgetDump; ## debuggery
$mw->MainLoop;

sub BuhBind {
    my( $wig , $tag ) = @_;
    my $str = "$wig -> bind( $tag ";
    $wig->bind( $tag => sub {
        warn " $str ## @_ ## $Tk::widget \n";
        return Tk->break  ; ## do not propagate, if $en is responding to return $mw doesn't have to
    } );
}

sub warner {
    warn "warner ## @_ ## $Tk::widget \n";
}