#!/usr/bin/perl
use warnings;
use strict;
use Glib qw/TRUE FALSE/;
use Gtk2 '-init';

# create a new window
my $window = Gtk2::Window->new('toplevel');
$window ->signal_connect( "destroy" => sub { Gtk2->main_quit; } );


my $vbox = Gtk2::VBox->new( FALSE, 0 );
$window->add($vbox);
$vbox->set_border_width(2);

my $button = Gtk2::Button->new_from_stock('gtk-close');
my $button1 = Gtk2::Button->new_from_stock('gtk-close');
my $button2 = Gtk2::Button->new_from_stock('gtk-close');

$button->set_label('uh oh lost icon'); #won't work

# sub by muppet
find_and_set_label_in ($button2->child, "This worked");

$button->signal_connect( "clicked" => \&callback, "cool button" );
$button1->signal_connect( "clicked" => \&callback, "cool button1" );
$button2->signal_connect( "clicked" => \&callback, "cool button2" );

$vbox->pack_start( $button, FALSE, FALSE, 0 );
$vbox->pack_start( $button1, FALSE, FALSE, 0 );
$vbox->pack_start( $button2, FALSE, FALSE, 0 );

$window->show_all();

Gtk2->main;
##################################################
# our usual callback function
sub callback {
my $widget = shift;
my $data   = shift;

printf "Hello again - %s was pressed\n", $data;
}
##################################################

sub find_and_set_label_in {
 #muppet magic
 my ($widget, $text) = @_;
 print "@_\n";
 if ($widget->isa (Gtk2::Container::)) {
       $widget->foreach (sub { find_and_set_label_in ($_[0], $text); });
    } elsif ($widget->isa (Gtk2::Label::)) {
       $widget->set_text ($text);
   }
}