-relief => 'solid',

##</code><code>##

  # after you instantiate all your widgets in $master.
  $master->update;
  my $maxHeight = (sort {$b <=> $a}
                   map $_->reqheight =>
                   $master->gridSlaves)[0];
  my $maxWidth  = (sort {$b <=> $a} 
                   map $_->reqwidth  =>
                   $master->gridSlaves)[0];

  $master->gridColumnconfigure($_, -minsize => $maxWidth)
    for 0 .. ($master->gridSize)[0];
  $master->gridRowconfigure   ($_, -minsize => $maxHeight)
    for 0 .. ($master->gridSize)[1];