libs/Yii/web/form/CFormElement.php

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<?php
/**
 * CFormElement class file.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2011 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

/**
 * CFormElement is the base class for presenting all kinds of form element.
 *
 * CFormElement implements the way to get and set arbitrary attributes.
 *
 * @property boolean $visible Whether this element is visible and should be rendered.
 * @property mixed $parent The direct parent of this element. This could be either a {@link CForm} object or a {@link CBaseController} object
 * (a controller or a widget).
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id$
 * @package system.web.form
 * @since 1.1
 */
abstract class CFormElement extends CComponent
{
	/**
	 * @var array list of attributes (name=>value) for the HTML element represented by this object.
	 */
	public $attributes=array();

	private $_parent;
	private $_visible;

	/**
	 * Renders this element.
	 * @return string the rendering result
	 */
	abstract function render();

	/**
	 * Constructor.
	 * @param mixed $config the configuration for this element.
	 * @param mixed $parent the direct parent of this element.
	 * @see configure
	 */
	public function __construct($config,$parent)
	{
		$this->configure($config);
		$this->_parent=$parent;
	}

	/**
	 * Converts the object to a string.
	 * This is a PHP magic method.
	 * The default implementation simply calls {@link render} and return
	 * the rendering result.
	 * @return string the string representation of this object.
	 */
	public function __toString()
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