#!/usr/bin/perl

=head1 DESCRIPTION

View random images from the supplied folder (supports . and ~).
Every time you close an image a new random image will open,
until the program is stopped.

Inspired by "Re^2: Tk show image from web" by IB2017
https://www.perlmonks.org/index.pl?node_id=11108799

=cut

use strict;
use warnings;
use autodie;

use File::Spec;
use MIME::Base64;

use Tk;
use Tk::Photo;
use Tk::JPEG;
use Tk::PNG;

my $dir = shift ||
die "Usage: $0 /path/to/images";
die 'Folder not found :-(' unless -d $dir;

opendir my $dh, glob $dir;
my @img = grep /\.(jpe?g|gif|png|bmp)/i, readdir $dh;
closedir $dh;

die 'No images found, try again!' unless @img;

while () {

  my $img  = $img[rand@img];
  my $path = File::Spec->catfile($dir,$img);
  
  open my $fh, '<', $path;
  my $dat = join '', <$fh>;
  close $fh;

  $dat = MIME::Base64::encode_base64($dat);

  print "$path \n";

  my $mw    = MainWindow->new;
  my $top   = $mw->Frame()->pack();
  my $image = $mw->Photo(-data => $dat);
  my $label = $top->Label(-image => $image)->pack();

  MainLoop
}