silverstripe-framework/forms/Tab.php

<?php
/**
 * Implements a single tab in a {@link TabSet}.
 *
 * Here is a simple implementation of a Tab. Obviously, you can include as much fields
 * inside as you want. A tab can contain other tabs as well.
 *
 * <code>
 * new Tab(
 * 	$title='Tab one',
 * 	new HeaderField("A header"),
 * 	new LiteralField("Lipsum","Lorem ipsum dolor sit amet enim.")
 * )
 * </code>
 *
 * @package forms
 * @subpackage fields-structural
 */
class Tab extends CompositeField {

	/**
	 * @var TabSet
	 */
	protected $tabSet;

	/**
	 * @var string
	 */
	protected $id;

	/**
	 * @uses FormField::name_to_label()
	 *
	 * @param string $name Identifier of the tab, without characters like dots or spaces
	 * @param string|FormField $titleOrField Natural language title of the tabset, or first tab.
	 * If its left out, the class uses {@link FormField::name_to_label()} to produce a title
	 * from the {@link $name} parameter.
	 * @param FormField ...$fields All following parameters are inserted as children to this tab
	 */
	public function __construct($name, $titleOrField = null, $fields = null) {
		if(!is_string($name)) {
			throw new InvalidArgumentException('Invalid string parameter for $name');
		}

		// Get following arguments
		$fields = func_get_args();
		array_shift($fields);

		// Detect title from second argument, if it is a string
		if($titleOrField && is_string($titleOrField)) {
			$title = $titleOrField;
			array_shift($fields);
		} else {
			$title = static::name_to_label($name);
		}

		// Remaining arguments are child fields
		parent::__construct($fields);

		// Assign name and title (not assigned by parent constructor)
		$this->setName($name);
		$this->setTitle($title);
		$this->setID(Convert::raw2htmlid($name));
	}

	public function ID() {
		if($this->tabSet) {
			return $this->tabSet->ID() . '_' . $this->id;
		} else {
			return $this->id;
		}
	}

	/**
	 * Set custom HTML ID to use for this tabset
	 *
	 * @param string $id
	 * @return $this
	 */
	public function setID($id) {
		$this->id = $id;
		return $this;
	}

	/**
	 * Get child fields
	 *
	 * @return FieldList
	 */
	public function Fields() {
		return $this->children;
	}

	/**
	 * Assign to a TabSet instance
	 *
	 * @param TabSet $val
	 * @return $this
	 */
	public function setTabSet($val) {
		$this->tabSet = $val;
		return $this;
	}

	/**
	 * Get parent tabset
	 *
	 * @return TabSet
	 */
	public function getTabSet() {
		return $this->tabSet;
	}

	public function extraClass() {
		return implode(' ', (array)$this->extraClasses);
	}

	public function getAttributes() {
		return array_merge(
			$this->attributes,
			array(
				'id' => $this->ID(),
				'class' => 'tab ' . $this->extraClass()
			)
		);
	}
}