BooleanOrNullControl for Nette framework

readme.md

This control aims to add support for [not specified|no|yes] control to Nette. This can not be done easily because of non-type-safe working with keys in Nette\Forms.

Keep in mind that getValue returns TRUE|FALSE|NULL while getRawValue returns internal representation of these values.

I only used this with custom rendering, I don't know whether it renders correctly by default.

Snippet i used for rendering:

Note that use of $form[$name]->rawValue instead of value

	<div class="form-group">
		<div class="control-label col-sm-2">
			{label $name/}
		</div>
		<div class="col-sm-10">
			<div class="btn-group" data-toggle="buttons">

				{foreach $form[$name]->items as $key => $label}
					<label n:class="btn,btn-default, $form[$name]->rawValue === $key ? active" n:name="$name:$key">
						<input n:name="$name:$key"> {$label}
					</label>
				{/foreach}
			</div>
		</div>
	</div>

BooleanOrNullControl.php

<?php


namespace Forms\Controls;


use Nette\Forms\Controls\RadioList;

class BooleanOrNullControl extends RadioList
{

	const NULL  = -1;
	const FALSE = 0;
	const TRUE  = 1;

	protected $boolOrNullItems;



	/**
	 * @inheritDoc
	 */
	public function __construct($label = NULL, $nullLabel = 'Not specified', $falseLabel = 'No', $trueLabel = 'Yes')
	{
		$this->boolOrNullItems = [
			self::NULL  => $nullLabel,
			self::FALSE => $falseLabel,
			self::TRUE  => $trueLabel,
		];

		parent::__construct($label, $this->boolOrNullItems);
	}



	/**
	 * @inheritDoc
	 */
	public function setItems(array $items, $useKeys = TRUE)
	{
		return parent::setItems($this->boolOrNullItems);
	}



	/**
	 * @param null|bool $value
	 * @return \Nette\Forms\Controls\ChoiceControl
	 */
	public function setValue($value)
	{
		if ($value === NULL) {
			$value = self::NULL;
		} elseif ($value === TRUE) {
			$value = self::TRUE;
		} elseif ($value === FALSE) {
			$value = self::FALSE;
		} else {
			return $this->setValue((bool) $value);
		}
		$this->value = $value;

		return $this;
	}



	/**
	 * @return bool|null
	 */
	public function getValue()
	{
		$value = parent::getValue();

		if ($value === self::TRUE) {
			return TRUE;
		} elseif ($value === self::FALSE) {
			return FALSE;
		} else {
			return NULL;
		}

	}


}