Hi, I just came accross this by Stephen Lidie about creating a mega-widget, hope it helps. It uses Tk::Derived .

#Stephen Lidie wrote:
#There are at least two ways of doing it: ferreting out the actual  
#superclass callback and invoking it manually (not recommended), or  
#creating a proper mega-widget.  The mega-widget method is cleaner and
+  
#seems to do what you want.

#Here is a modified version of the Emu example.  First, note that I  
#added Tk::Derived to the module's base class because we need to turn 
+ 
#this into a first class mega-widget - it's no longer a simple example
+.  
#Second, the <Enter> binding has been deleted from the class  
#initialization method ClassInit().

-------------------------------------------------------------
use Tk;
use strict;

package MyButton;

use base qw/Tk::Derived Tk::Button/;
Construct Tk::Widget 'MyButton';

sub ClassInit {
     my ($class, $mw) = @_;
     $class->SUPER::ClassInit($mw);
#    $mw->bind($class, '<Enter>', sub{print "Entered a MyButton\n"});
}

sub Populate {
     my ($self, $args) = @_;
     $self->SUPER::Populate($args);
     $self->bind('<Enter>', sub{print "Entered a MyButton\n"});
#    my (@bt) = $self->bindtags;
#    $self->bindtags( [ @bt[ 1, 0, 2, 3 ] ] );
}

1;

package main;

my $mw = MainWindow->new;
$mw->Button(-text => 'NormalButton')->pack;
$mw->MyButton(-text => 'MyButton')->pack;

MainLoop;
#--------------------------------------------------------------

#The real change is the addition of Populate(), the class instance  
#constructor. It's responsible for creating the <Enter> binding.  Now 
+ 
#when you <Enter> a MyButton mega-widget it behaves exactly as a norma
+l  
#Button does, plus, it prints a message.
[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.