Several changes:

  1. Thanks, and your two suggestions were implemented.
  2. In the old version, it waits even after failed to load the image; in this new version, it no longer waits in this situation.
  3. The time dealyed is now a constant, for better coding style. 
use Tk;
use Tk::JPEG;
use File::Glob ':glob';

use constant DELAY => 1000;

my @jpgs = bsd_glob("*.jpg");
my $index = 0;

my $mw = MainWindow->new(title => "JPEG");
my $image = $mw->Photo();
$mw->Button(-image => $image)->pack();

$mw->after(DELAY, \&next_image);
MainLoop;

sub next_image {
    $image->blank();
    if (eval {$image->read($jpgs[$index]); 1}) {
        $mw->configure(-title => $jpgs[$index]);
        $mw->after(DELAY, \&next_image) if (++$index <= $#jpgs);
    } else {
        $mw->after(0, \&next_image) if (++$index <= $#jpgs);
    }
}

[download]

In reply to Re: slide view of a folder a JPEG's by pg
in thread slide view of a folder of JPEG's by pg

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.