public function __construct(Window $parent, $rows = 0, $cols = 0, $y = 0, $x = 0)
{
$width = 80;
$height = 10;
$x = ($parent->getMaxX() - $width) / 2;
$y = ($parent->getMaxY() - $height) / 2;
parent::__construct($parent, $height, $width, $y, $x);
}