protected function createComponentMyForm()
    {
        $form = new Nette\Application\UI\Form;
        $presenter = $this;

        $products = $form->addDynamic('products', function (Container $container) use ($presenter) {
            $container->addText('pocet', 'Pocet');
            $container->addSubmit('buy', 'Koupit')
                ->onClick[] = callback($presenter, 'Buy');
        }, 0);

        // kontejnery vytvoř v továrničce! do toho je to továrnička
        foreach($this->model->products as $product)
        {
            $products->createOne($product->id);
        }

        return $form;
    }