文本元素的缓冲/更新问题

#!/usr/bin/perl

use strict;
use Tkx;

my $mw = Tkx::widget->new('.');

$mw->g_wm_minsize( 400, 350 );

my $btn_start = $mw->new_ttk__button( -text => "Start", -width => 60, -command => sub { start(); } );

my $txt_processed_domains = $mw->new_tk__text( -width => 40, -height => 10, -state => "disabled", -wrap => "none" );

Tkx::grid( $btn_start, -row => 2, -columnspan => 3, -padx => 10, -pady => 10 );

Tkx::grid( $txt_processed_domains, -row => 3, -columnspan => 3, -padx => 10, -pady => 10 );

Tkx::MainLoop();

sub start {

    foreach my $id ( 1.. 10 ) {

        $txt_processed_domains->configure(-state => "normal");
        $txt_processed_domains->insert_end( "$id => Available\n" );
        $txt_processed_domains->configure(-state => "disabled");

        sleep 1;
    }

    Tkx::tk___messageBox( -message => "Completed!" );
}

我需要看看哪些身份证被处理,但只有在最后得到整个名单。这就像用文件句柄缓冲,但我不确定。如何在插入文本框后看到文本?