$_[HEAP]{tview} = $_[HEAP]->add( 'win1', 'Window' )->add(
     'text', 'TextViewer',
     -wrapping => 1,
     # -width    => -1,
     # -height   => -1
     -border => 1,
     -y      => 1,
     -bfg    => 'red',
     -bg     => "white",
     -fg     => "green",
 )