EDIT: I always get some idea after I post my question...

This is a better approach. Still not the right one, as it must be possible to set directly that color some way.

#!/usr/bin/perl
use warnings;
use strict;
use Tk;
use Tk::TableMatrix;

my $mw = MainWindow->new;

my $arrayVar = {};

print "Filling Array...\n";
my ($rows,$cols) = (10, 10);
 foreach my $row  (0..($rows-1)){
    foreach my $col (0..($cols-1)){
      $arrayVar->{"$row,$col"} = "$row,$col";
   }
}

print "Creating Table...\n";

sub colSub{
  my $col = shift;
  return "OddCol" if( $col > 0 && $col%2) ;
}

sub rowSub{
  my $row = shift;
  return "Oddrow" if( $row > 0 && $row%2) ;
}

 my $t = $mw->Scrolled('TableMatrix', -rows => $rows, -cols => $cols,
 -width => 6, -height => 6,
 -titlerows => 1, -titlecols => 1,
 -variable => $arrayVar,
 -coltagcommand => \&colSub,
 #-browsecommand => \&coloring,
 -colstretchmode => 'last',
 -rowtagcommand => \&rowSub,
 -rowstretchmode => 'last',
 -selectmode => 'extended',
 -selecttitles => 0,
 -drawmode => 'slow',
 -scrollbars=>'se',
 -relief => 'ridge',
 -selectmode => 'extended',
 -selecttype=>'row',
 );
$t->bind('<Button-1>', \&coloring);
#  Color definitions here:
$t->tagConfigure('active', -bg => 'lightyellow', -fg => 'black');
$t->tagConfigure('nonactive', -bg => 'white', -fg => 'black');
$t->pack(-expand => 1, -fill => 'both');
$t->focus;
$t->configure (-state=>'disabled');
Tk::MainLoop;

my $selected = -1;
my $prev_selected = -1;

$t->bind('<Button-1>', \&coloring);
sub coloring {
my $t = shift;
    print "COLORING SELECTED ROW ($prev_selected = $selected)...\n";
    my $event = $t->XEvent;
    $selected = $t->index('@'.$event->x.','.$event->y, 'row');
    $t->tagRow('nonactive',$prev_selected) if (defined $prev_selected 
+ && $prev_selected != -1);
    $t->tagRow('active',$selected) if (defined $selected);
    $prev_selected = $selected;
}
[download]

G'day Takamoto,

I see you've used the tagConfigure() method here (and twice in your follow-up post). I'd say you're on the right track with that; however, you probably want the 'sel' tag. See the Tags section of the Tk::TableMatrix documentation.

"... set the color ... when a cell/row is selected/in focus/highlighted (I do not know how to express it, sorry)."

I can understand that it may be difficult to use the exact terms for something that you're unfamiliar with; unfortunately, that becomes a problem when trying to provide an answer.

I think Tags is what you want. There are other options that you may find useful. Those listed under "STANDARD OPTIONS", such as -highlightbackground and -highlightcolor may serve your purpose (see Tk::options for their documentation). Also, the Tk::TableMatrix option -invertselected might be sufficient for your needs.

If you read through the documentation, you'll probably find what you want; in addition, by doing this, you'll learn the terminology. As an extra bonus, tags are used by other widgets so you'll also learn principles you can use elsewhere, e.g. Tk::Text; the same applies to other areas such as Indices.

Thank you, Ken

Oh, it was as simple as using the 'sel' tag!!! This simple line does exactly what I wanted...

$t->tagConfigure('sel', -bg => 'lightyellow', -fg => 'black');
[download]

 use Tk::TableMatrix::Spreadsheet;
 my $t = $mw->Scrolled('Spreadsheet', -rows => $rows, -cols => $cols,
[download]