No, because the superclass method does things before and after the loop. The only thing that the GUI aspect does is update a progress bar during a loop. I settled on simply having an if-then within updateprogress 
sub updateprogress {
    my ($self) = @_;

    return unless $self->progressbar;
    my @frac = ($self->recordi, $self->recordcount);

    my $frac = frac(@frac);

    $self->progressbar->set_fraction($frac->num);

    $self->progressbar->set_text( sprintf '%d / %d', @frac);

    use Gtk2;
    while (Gtk2->events_pending) {
      Gtk2->main_iteration;
    }
    Gtk2::Gdk->flush;
}

[download]
sub manager {
    my ($Operation) = @_;

    my @row = $Operation->getnew;
    $Operation->log->debug( 'getnew rows:' . scalar(@row) );

    $Operation->recordi(0);
    for my $row (@row) {
        $Operation->recordi( $Operation->recordi + 1 );

        $Operation->log->debug( ' --- data --- ' . Dumper($row) );
        $Operation->data($row);
        $Operation->process;

    $Operation->updateprogress;
    }

}

[download]




The mantra of every experienced web application developer is the same: thou shalt separate business logic from display. Ironically, almost all template engines allow violation of this separation principle, which is the very impetus for HTML template engine development.

-- Terence Parr, "Enforcing Strict Model View Separation in Template Engines"

In reply to Re^2: You cannot pass args when calling inner() in Moose? by metaperl
in thread You cannot pass args when calling inner() in Moose? by metaperl

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.