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

my $mw = MainWindow->new();

#create some sample data 
my %data;

foreach (0..100) {
      $data{$_}{'name'} = 'name'.$_;
      $data{$_}{'id'} =   rand(time);
      $data{$_}{'priority'} =  int rand 50;
}
#get random list of keys 
my @keys = keys %data;

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

my $h = $mw->Scrolled( 'HList',
                       -header => 1,
                       -columns => 3,
                       -width => 40,
                       -height => 40,
                       -takefocus => 1,
                       -background => 'steelblue',
                       -foreground =>'snow',
                       -selectmode => 'single',
                       -selectforeground => 'pink',
                       -selectbackground => 'black',
                #       -browsecmd => \&browseThis, 
                   )->pack(-side => "left", -anchor => "n");

$h->header('create', 0, -text => '   Name  ',
                        -borderwidth => 3,
                        -headerbackground => 'steelblue',
                        -relief => 'raised');

$h->header('create', 1, -text => '      ID      ',
                        -borderwidth => 3,
                        -headerbackground => 'lightsteelblue',
                        -relief => 'raised');

$h->header('create', 2, -text => '  Priority  ',
                        -borderwidth => 3,
                        -headerbackground => 'lightgreen',
                        -relief => 'raised');


foreach (@keys) {
     my $e = $h->addchild(""); #will add at end 

     $h->itemCreate ($e, 0,
           -itemtype => 'text',
           -text => $data{$_}{'name'},
            );

     $h->itemCreate($e, 1,
           -itemtype => 'text',
           -text => $data{$_}{'id'},
         );

     $h->itemCreate($e, 2,
           -itemtype => 'text',
           -text => $data{$_}{'priority'},
         );

}

my $button = $mw->Button(-text => 'exit',
                         -command => sub{exit})->pack;

my $sortid = $mw->Button(-text => 'Sort by Id',
                         -command => [\&sort_me,1] )->pack;

my $sortpriority = $mw->Button(-text => 'Sort by Priority',
                         -command => [\&sort_me,2] )->pack;


MainLoop;
######################################################### 
sub sort_me{
  my $col = shift;

  my @entries = $h->info('children');
  my @to_be_sorted =();

 foreach my $entry(@entries){
           push @to_be_sorted,
           [ $h->itemCget($entry,0,'text'),
             $h->itemCget($entry,1,'text'),
             $h->itemCget($entry,2,'text'),
           ];
           }

  my @sorted = sort{ $a->[$col] cmp $b->[$col]  || #primary sort ascii
+ 
                     $a->[1] <=> $b->[1]           #secondary sort num
+eric 
                       } @to_be_sorted;

my $entry = 0;
  foreach my $aref (@sorted){
#    print $aref->[0],' ',$aref->[1],' ',$aref->[1],"\n"; 
    $h->itemConfigure( $entry, 0, 'text' => $aref->[0] );
    $h->itemConfigure( $entry, 1, 'text' => $aref->[1] );
    $h->itemConfigure( $entry, 2, 'text' => $aref->[2] );
    $entry++;
  }

$mw->update;
}
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