<?php
interface IBuilder
{

    function buildField($name, $label);

}

class Builder implements IBuilder
{
    private $form;

    public function __construct(Nette\Application\UI\Form $form)
    {
        $this->form = $form;
    }

    public function buildField($name, $label)
    {
        $this->form->addText($name, $label);
    }

}


class Director
{
    private $builder;

    public function __construct(IBuilder $builder)
    {
        $this->builder = $builder;
    }

    // nemusí být nezbytně v parametru, možné nakonfigurovat i jinak
    public function build($config)
    {
        $this->builder->buildField($config->name, $config->label);
        // ...

        return $this->builder;
    }

}


$director = new Director(new Builder(new Nette\Application\UI\Form));
$form = $director->build((object)array(
    'name' => 'sex',
    'label' => 'Pohlaví'
));

echo $form;