<?php

class WebPageGeneratorForm extends Nette\Application\UI\Form {

    public function __construct(Nette\ComponentModel\IContainer $parent=NULL, $name=NULL) {
        parent::__construct($parent, $name);
        $this->addContainer("body");
        $this["body"]->addContainer("background");
        $this["body"]["background"]->currentGroup = $this->addGroup("foo", FALSE);
        $this["body"]["background"]->addText("backgroundColor", "Background color:");
        $this["body"]["background"]->addText("backgroundPosition", "Background position:", $backgroundPosition);
        $this["body"]["background"]->addSelect("backgroundRepeat", "Background repeat:");
        $this["body"]["background"]->addUpload("backgroundImage", "Background image:");


        ...
    }
}