#!/usr/bin/perl -w
use strict;
use Gtk2 '-init';

use constant TRUE  => 1;
use constant FALSE => 0;

my $window = Gtk2::Window->new;
$window->set_title('Widget Layout');
$window->signal_connect( destroy => sub { Gtk2->main_quit; } );
$window->set_border_width(3);

my $vbox = Gtk2::VBox->new( FALSE, 6 );

$window->add($vbox);

my $frame = Gtk2::Frame->new('Buttons');
$vbox->pack_start( $frame, TRUE, TRUE, 0 );

$frame->set_border_width(3);

my $hbox = Gtk2::HBox->new( FALSE, 6 );
$frame->add($hbox);
$hbox->set_border_width(3);

my $inc_button = Gtk2::Button->new('_Click Me');
$hbox->pack_start( $inc_button, FALSE, FALSE, 0 );
my $count = 1;

my $add_button = Gtk2::Button->new('add_label');
$hbox->pack_start( $add_button, FALSE, FALSE, 0 );

my $rem_button = Gtk2::Button->new('remove_label');
$hbox->pack_start( $rem_button, FALSE, FALSE, 0 );


my $quit_button = Gtk2::Button->new('_Quit');
$hbox->pack_start( $quit_button, FALSE, FALSE, 0 );
$quit_button->signal_connect(
    clicked => sub {
        Gtk2->main_quit;
    }
);

my $label = Gtk2::Label->new('Clicked 0 times.');

# has to be done after we've created the label so we can get to it
$inc_button->signal_connect(
    clicked => sub {
        $label->set_text("Clicked $count times.");
        $count++;
    }
);

$add_button->signal_connect(
    clicked => sub {
        $vbox->pack_start( $label, TRUE, TRUE, 0 );
        $label->show
    }
);

$rem_button->signal_connect(
    clicked => sub {
        $label->destroy;
    }
);

$window->show_all;
Gtk2->main;
[download]