#!/usr/bin/perl

use strict;
use warnings;
use feature qw( state );
use Tk;

my ( @bHits, @rHits );
my ( @bList, @rList );
state $turn = 0;

my $mw = MainWindow->new( -title => 'Test Grid!' );
$mw->geometry( '1000x400+200+50' );
$mw->resizable( 0, 0 );
$mw->Label( -text       => 'Test Grid',
            -foreground => 'black',
          )->pack( -side   => 'top',
                   -expand => '0', );

my $mw_switch_b = $mw->Button(
            -text    => 'Switch',
            -command => \&toggleButtons,
          )->pack;

my $mw_exit_b = $mw->Button( -text    => 'Exit',
                             -command => sub { exit }
                           )->pack;
my ( $blueFrame, $redFrame, $blHitFrame, $rdHitFrame );

$blueFrame = $mw->Frame;
$redFrame  = $mw->Frame;
### Blue Grid
for my $row ( 0 .. 9 ) {
    for my $col ( 0 .. 9 ) {;
        $blueFrame->Button( -text       => $col . $row,
                            -background => 'light blue',
                            -command    => \&toggleButtons ,
                          )->grid( -row => $row, -column => $col );
    }
}
### Red Grid
for my $row ( 0 .. 9 ) {
    for my $col ( 0 .. 9 ) {
        $redFrame->Button( -text       => $col . $row,
                           -background => 'gray',
                           -command    => \&toggleButtons,
                           -state      => 'disabled',
                         )->grid( -row => $row, -column => $col );
    }
}

$blueFrame->pack( -side => 'left',  -padx => '10' );
$redFrame->pack( -side  => 'right', -padx => '10' );

@bList = $blueFrame->gridSlaves();
@rList = $redFrame->gridSlaves();

MainLoop;

sub toggleButtons {
    my $bg = 'light blue';
    for my $list (\@bList, \@rList) {
        my ($state, $background) = 'disabled' eq $list->[0]->cget('-state')
                                   ? ('normal', $bg)
                                   : qw/disabled gray/;
        for my $button (@$list) {
            $button->configure(-state => $state,
                               -background => $background);
        }
        $bg = 'indian red';
    }
}