#!/usr/bin/perl
use strict;
use warnings;

use Tk;

tk_main();
MainLoop();
exit;


sub tk_main {
    my $mw = MainWindow->new();
    $mw->title('Pack Layout 1');

    # |------------------------------------------------|
    # |                      Frame 1                   |
    # |------------------------------------------------|
    # |      Frame 2    |            Frame 3           |
    # |                 |------------------------------|
    # |                 |             Frame 4          |
    # |------------------------------------------------|
    my $frame1 = $mw->Frame(
        -borderwidth => 5,
        -background  => 'blue',
    )->pack(
        -side   => 'top',
        -expand => 1,
        -fill   => 'both',
    );
    my $frame2 = $mw->Frame(
        -borderwidth => 5,
        -background  => 'green',
    )->pack(
        -side => 'left',
        -expand => 1,
        -fill   => 'both',
    );
    my $f_tmp  = $mw->Frame(
        -borderwidth => 5,
        -background  => 'red',
    )->pack(
        -side => 'left',
        -expand => 1,
        -fill   => 'both',
    );
    my $frame3 = $f_tmp->Frame(
        -borderwidth => 5,
        -background  => 'orange',
    )->pack(
        -side => 'top',
        -expand => 1,
        -fill   => 'both',
    );
    my $frame4 = $f_tmp->Frame(
        -borderwidth => 5,
        -background  => 'magenta',
    )->pack(
        -side => 'top',
        -expand => 1,
        -fill   => 'both',
    );

    $frame1->Label(-text => 'Label 1')->pack();
    $frame2->Label(-text => 'Label 2')->pack();
    $frame3->Label(-text => 'Label 3')->pack();
    $frame4->Label(-text => 'Label 4')->pack();
}