Subversion-Projekte lars-tiefland.prado

<?php

/**

 * TActiveRadioButton class file.

 *

 * @author Wei Zhuo <weizhuo[at]gamil[dot]com>

 * @link http://www.pradosoft.com/

 * @copyright Copyright © 2005-2008 PradoSoft

 * @license http://www.pradosoft.com/license/

 * @version $Id: TActiveRadioButton.php 2600 2009-01-07 12:58:53Z christophe.boulain $

 * @package System.Web.UI.ActiveControls

 */

/**

 * TActiveRadioButton class.

 *

 * The active control counter part to radio button. The {@link setAutoPostBack AutoPostBack}

 * property is set to true by default. Thus, when the radio button is clicked a

 * {@link onCallback OnCallback} event is raise after {@link OnCheckedChanged} event.

 *

 * The {@link setText Text} and {@link setChecked Checked} properties can be

 * changed during a callback.

 *

 * The {@link setGroupName GroupName} property may <b>NOT</b> be changed

 * during callback because the client-side <tt>name</tt> attribute is read-only

 * and can not be changed using javascript.

 *

 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>

 * @version $Id: TActiveRadioButton.php 2600 2009-01-07 12:58:53Z christophe.boulain $

 * @package System.Web.UI.ActiveControls

 * @since 3.1

 */

class TActiveRadioButton extends TRadioButton implements IActiveControl, ICallbackEventHandler

{

	/**

	 * Creates a new callback control, sets the adapter to

	 * TActiveControlAdapter. If you override this class, be sure to set the

	 * adapter appropriately by, for example, by calling this constructor.

	 */

	public function __construct()

	{

		parent::__construct();

		$this->setAdapter(new TActiveControlAdapter($this));

		$this->setAutoPostBack(true);

	}

	/**

	 * @return TBaseActiveCallbackControl standard callback control options.

	 */

	public function getActiveControl()

	{

		return $this->getAdapter()->getBaseActiveControl();

	}

	/**

	 * @return TCallbackClientSide client side request options.

	 */

	public function getClientSide()

	{

		return $this->getAdapter()->getBaseActiveControl()->getClientSide();

	}

	/**

	 * Raises the callback event. This method is required by {@link

	 * ICallbackEventHandler} interface.

	 * This method is mainly used by framework and control developers.

	 * @param TCallbackEventParameter the event parameter

	 */

 	public function raiseCallbackEvent($param)

	{

		$this->onCallback($param);

	}

	/**

	 * This method is invoked when a callback is requested. The method raises

	 * 'OnCallback' event to fire up the event handlers. If you override this

	 * method, be sure to call the parent implementation so that the event

	 * handler can be invoked.

	 * @param TCallbackEventParameter event parameter to be passed to the event handlers

	 */

	public function onCallback($param)

	{

		$this->raiseEvent('OnCallback', $this, $param);

	}

	/**

	 * Updates the button text on the client-side if the

	 * {@link setEnableUpdate EnableUpdate} property is set to true.

	 * @param string caption of the button

	 */

	public function setText($value)

	{

		parent::setText($value);

		if($this->getActiveControl()->canUpdateClientSide())

			$this->getPage()->getCallbackClient()->update(

				$this->getDefaultLabelID(), $value);

	}

	/**

	 * Checks the radio button.

	 * Updates radio button checked state on the client-side if the

	 * {@link setEnableUpdate EnableUpdate} property is set to true.

	 * @param boolean whether the radio button is to be checked or not.

	 */

	public function setChecked($value)

	{

		$value = TPropertyValue::ensureBoolean($value);

		parent::setChecked($value);

		if($this->getActiveControl()->canUpdateClientSide())

			$this->getPage()->getCallbackClient()->check($this, $value);

	}

	/**

	 * Override parent implementation, no javascript is rendered here instead

	 * the javascript required for active control is registered in {@link addAttributesToRender}.

	 */

	protected function renderClientControlScript($writer)

	{

	}

	/**

	 * Ensure that the ID attribute is rendered and registers the javascript code

	 * for initializing the active control.

	 * Since 3.1.4, the javascript code is not rendered if {@link setAutoPostBack AutoPostBack} is false

	 *

	 */

	protected function renderInputTag($writer,$clientID,$onclick)

	{

		parent::renderInputTag($writer,$clientID,$onclick);

		if ($this->getAutoPostBack())

			$this->getActiveControl()->registerCallbackClientScript(

				$this->getClientClassName(), $this->getPostBackOptions());

	}

	/**

	 * @return string corresponding javascript class name for this TActiveRadioButton.

	 */

	protected function getClientClassName()

	{

		return 'Prado.WebUI.TActiveRadioButton';

	}

	/**

	 * Overrides parent implementation to ensure label has ID.

	 * @return TMap list of attributes to be rendered for label beside the radio button

	 */

	public function getLabelAttributes()

	{

		$attributes = parent::getLabelAttributes();

		$attributes['id'] = $this->getDefaultLabelID();

		return $attributes;

	}

	/**

	 * Renders a label beside the radio button.

	 * @param THtmlWriter the writer for the rendering purpose

	 * @param string radio button id

	 * @param string label text

	 */

	protected function renderLabel($writer,$clientID,$text)

	{

		$writer->addAttribute('id', $this->getDefaultLabelID());

		parent::renderLabel($writer, $clientID, $text);

	}

	/**

	 * @return string radio button label ID;

	 */

	protected function getDefaultLabelID()

	{

		if($attributes=$this->getViewState('LabelAttributes',null))

			return $this->getLabelAttributes()->itemAt('id');

		else

			return $this->getClientID().'_label';

	}

}

?>