I would like to create a logfile viewer in Perl Tk that can use a pipe to get input from another program's STDOUT. For instance:

$> tail -f logfile | logfileviewer
[download]

- or -

$> ls -l  | logfileviewer
[download]

I have a while loop to get <STDIN> as seen below:

#!/usr/local/bin/perl -w

use Tk;
use Tk::HList;
use Tk::ItemStyle;

$|=1;

########################
# Text Window

my $mw2 = MainWindow->new;

$mw2->title("LogViewer");

my $tex = $mw2->Scrolled("Text",
    -background    =>    'grey',
    -foreground    =>    'white'
    )->pack(
    -fill        =>    'both',
    -expand     =>    1,
    ); 

#create text tag
$tex->tagConfigure('red', -foreground    => 'red' );

Tk::MainLoop;

sub DisplayItem {
    print "Called DisplayItem\n";    

    $tex->insert("end", "$_[0]", 'red' );
}

while( <STDIN> ) {

    print "While called with: $_\n";
    chomp;
    &DisplayItem( $_ );

} # end while
[download]

However, I only get the following error when closing the MainWindow:

While called with: random text in file
Called DisplayItem
Failed to AUTOLOAD 'Tk::Frame::insert' at logviewer line 37
[download]

Any assistance would be appreciated. Thanks.

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