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<?php
/**
* TActiveHiddenField class file.
*
* @author Carl G. Mathisen <carlgmathisen@gmail.com>
* @link https://github.com/pradosoft/prado
* @copyright Copyright © 2005-2016 The PRADO Group
* @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
* @version $Id$
* @package System.Web.UI.ActiveControls
*/
Prado::using('System.Web.UI.ActiveControls.TActiveControlAdapter');
/**
* TActiveHiddenField class
*
* TActiveHiddenField displays a hidden input field on a Web page.
* The value of the input field can be accessed via {@link getValue Value} property.
*
* @author Carl G. Mathisen <carlgmathisen@gmail.com>
* @package System.Web.UI.ActiveControls
* @since 3.1
*/
class TActiveHiddenField extends THiddenField implements ICallbackEventHandler, IActiveControl
{
/**
* 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));
}
/**
* @return TBaseActiveCallbackControl standard callback control options.
*/
public function getActiveControl()
{
return $this->getAdapter()->getBaseActiveControl();
}
/**
* @return TCallbackClientSide client side request options.
*/
public function getClientSide()
{
return $this->getAdapter()->getBaseActiveControl()->getClientSide();
}
/**
* Client-side Value property can only be updated after the OnLoad stage.
* @param string text content for the hidden field
*/
public function setValue($value)
{
if(parent::getValue() === $value)
return;
parent::setValue($value);
if($this->getActiveControl()->canUpdateClientSide() && $this->getHasLoadedPostData())
$this->getPage()->getCallbackClient()->setValue($this, $value);
}
/**
* Raises the callback event. This method is required by {@link
* ICallbackEventHandler} interface.
* This method is mainly used by framework and control developers.
* @param TCallbackEventParameter the event parameter
*/
public function raiseCallbackEvent($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, $param);
}
/**
* Gets the name of the javascript class responsible for performing postback for this control.
* This method overrides the parent implementation.
* @return string the javascript class name
*/
protected function getClientClassName()
{
return 'Prado.WebUI.TActiveHiddenField';
}
/**
* Override parent implementation, no javascript is rendered here instead
* the javascript required for active control is registered in {@link addAttributesToRender}.
*/
protected function renderClientControlScript($writer)
{
}
/**
* Ensure that the ID attribute is rendered and registers the javascript code
* for initializing the active control.
*/
protected function addAttributesToRender($writer)
{
parent::addAttributesToRender($writer);
$writer->addAttribute('id',$this->getClientID());
$this->getActiveControl()->registerCallbackClientScript(
$this->getClientClassName(), $this->getPostBackOptions());
}
}
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