You are looking for the -browsecmd. With the HList, you usually have to devise a system of looping thru all possible selections. For a fully functional example of using the HList, ItemStyle with images, and looping thru entries, see ztkdb-sql where it's all done. A similar, but smaller version is at ztkdb.

What you have to watch out for, is that HList keeps an internal counter of added entries, and you need to learn to reuse them by reconfiguring them with $hlist->selectionSet( 0 ), or whichever row you want to modify. This is important in paging. If you don't use selectionSet(), you risk the internal counter continually increasing and causing unwanted memory gains.

Finally, carefully read thru the perldoc for Tk::HList, and see all it's methods, they are not easy to understand until you practice using them.

#!/usr/bin/perl
use Tk;
use Tk::HList;
use YAML;

$top = new MainWindow;

$hlist = $top->Scrolled("HList",
   -header => 1,
   -columns => 4,
   -scrollbars => 'osoe',
   -command => sub{print 1},
   -width => 70,
   -selectbackground => 'SeaGreen3',
   -browsecmd => \&browseThis,
         )->pack(-expand => 1, -fill => 'both');

$hlist->header('create', 0, -text => 'From');
$hlist->header('create', 1, -text => 'Subject');
$hlist->header('create', 2, -text => 'Date');
$hlist->header('create', 3, -text => 'Size');

$hlist->add(0);
$hlist->itemCreate(0, 0, -text => "eserte\@cs.tu-berlin.de");
$hlist->itemCreate(0, 1, -text => "Re: HList?");
$hlist->itemCreate(0, 2, -text => "1999-11-20");
$hlist->itemCreate(0, 3, -text => "1432");

$hlist->add(1);
$hlist->itemCreate(1, 0, -text => "dummy\@foo.com");
$hlist->itemCreate(1, 1, -text => "Re: HList?");
$hlist->itemCreate(1, 2, -text => "1999-11-21");
$hlist->itemCreate(1, 3, -text => "2335");


MainLoop;

sub browseThis{
     for my $column (0..3){
       print $hlist->itemCget( $hlist->selectionGet, $column, 'text' )
+, "\n";
     }
}


=head1

  my $listArrayRef = [];

  my @selectedindices = $hlist->info('selection');

  foreach my $r (@selectedindices) {
     push @{$listArrayRef}, getRowArrayRef($hlist, $r);
     print Dump(@{$listArrayRef}),"\n";
   }

  sub getRowArrayRef {
    my ($hlist, $r) = @_;
    my @row;
   foreach my $c  (0 .. $hlist->cget(-columns) -1) {
     push @row, $hlist->itemCget($r, $c, '-text');
   } 
   return \@row;
  }    

}
=cut
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