While this appears to work, I'm not sure it's the "right" way.
In fact, I'm tempted to say that having your program press buttons by itself is bad UI. It takes control away from the user and can surprise and irritate him.

#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11147002
use warnings;
use Tk;

my $mw = new MainWindow;
my $label = $mw -> Label(-text=>"Hello World") -> pack();
my $button = $mw -> Button(-activebackground => 'red', -activeforegrou
+nd => 'black', -text => "Quit"
);
$button->bind('<ButtonPress-1>' => \&myexit);
$button->bind('<ButtonRelease-1>' => \&myexit2);
$button->pack;

$button->eventGenerate('<ButtonPress-1>');
$button->eventGenerate('<ButtonRelease-1>');

$mw->after(5000 => \&doit);
$mw->after(10000 => \&doit2);

sub doit {
     $button->focus;
     $button->eventGenerate('<ButtonPress-1>');
}

sub doit2 {
     $button->focus;
     $button->eventGenerate('<ButtonRelease-1>');
}

MainLoop;

sub myexit {
print time."\n";
}

sub myexit2 {
$button->configure(-background => "gray", -foreground => "black");
$button->eventGenerate('<Leave>'); # NOTE
print time." 2\n";
}
[download]

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