My problem is this: I have a callback that can take a several seconds to execute and the feedback is strongly in favor of some notice that the program is doing something. After a couple hours I came up with this horrible bit of code: 
use strict;
use warnings;

use Tk;

my $top = new MainWindow;
$top->Button( -text => 'Start LongTime.exe', -command => \&longtime )
    ->pack;
my $diag = $top->Dialog( -text => 'Working...', -buttons => [] );

MainLoop;

sub longtime {
    $diag->after( 100,
        sub {
            system('longtime.exe');
            $diag->{selected_button} = 1
        } );
    $diag->Show();
}

[download]
Which works, but I'm hoping there's a way that's slightly more kosher. (I know threading would help, but restructuring the code to that extent is off in the future)

In reply to Tk Dialog Manipulation by Anonymous Monk

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