I am trying to learn tk so i am writing a simple script to ping hosts and make their names red if they are down and green if they are up. The script works fine except I cannot figure out how to make it refresh the screen. Currently the timer reruns the main subroutine and prints the output below the current output, i would just like it to update what is already there. I tried ->update as you can see on line 35 (it is commented out now) but that did not work. Any help would be appreicated, tk seems pretty cool and i would like to learn it.

#!/usr/bin/perl

use strict;
use warnings;

use Net::Ping;
use Tk;

my @host_array = qw(server1 server2 server3 server4);

my $window = MainWindow->new();
$window->minsize( qw(250 250));
$window->title("Server Status");
$window->configure (-background => 'grey');

my $top = $window->Frame(-background => 'grey',)->pack(-side=>'top',-f
+ill=>'x');
#$window->Button(-text => "Refresh", -command => \&pinghost )->pack;
my $timer = $window->repeat(2000,\&pinghost);
$window->Button(-text => "Quit", -command => \&Quit )->pack;

&pinghost;

MainLoop();

#########################################################

sub pinghost{
  foreach my $host (@host_array) {
    my $color = ("green");
    my $p = Net::Ping->new("icmp");
    $color = ("red") unless $p->ping($host, 2);
    $p->close();
    my $t1 = $top->Label(-text=>"$host",-background => "$color")->pack
+();
  }
  #$window->update;
}

sub Quit{
  exit;
}

[download]

Thanks, Sean

In reply to TK refresh widgit data by siffland

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