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<?php
/**
* THiddenField class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.xisc.com/
* @copyright Copyright © 2004-2005, Qiang Xue
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
*/
/**
* THiddenField class
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
* @since 3.0
*/
class THiddenField extends TControl implements IPostBackDataHandler
{
/**
* @return string tag name of the hyperlink
*/
protected function getTagName()
{
return 'input';
}
public function focus()
{
throw new TInvalidOperationException('xxx');
}
protected function addAttributesToRender($writer)
{
$page=$this->getPage();
$page->ensureRenderInForm($this);
$writer->addAttribute('type','hidden');
if(($uid=$this->getUniqueID())!=='')
$writer->addAttribute('name',$uid);
if(($id=$this->getID())!=='')
$writer->addAttribute('id',$id);
if(($value=$this->getValue())!=='')
$writer->addAttribute('value',$value);
}
/**
* @return string the value of the THiddenField
*/
public function getValue()
{
return $this->getViewState('Value','');
}
/**
* Sets the value of the THiddenField
* @param string the value to be set
*/
public function setValue($value)
{
$this->setViewState('Value',$value,'');
}
public function getEnableTheming()
{
return false;
}
public function setEnableTheming($value)
{
throw new TInvalidOperationException('no_theming_support');
}
public function setSkinID($value)
{
throw new TInvalidOperationException('no_theming_support');
}
/**
* Loads hidden field data.
* This method is primarly used by framework developers.
* @param string the key that can be used to retrieve data from the input data collection
* @param array the input data collection
* @return boolean whether the data of the component has been changed
*/
public function loadPostData($key,$values)
{
$value=$values[$key];
if($value===$this->getValue())
return false;
else
{
$this->setValue($value);
return true;
}
}
/**
* Raises postdata changed event.
* This method calls {@link onValueChanged} method.
* This method is primarly used by framework developers.
*/
public function raisePostDataChangedEvent()
{
$this->onValueChanged(new TEventParameter);
}
/**
* This method is invoked when the value of the <b>Value</b> property changes between posts to the server.
* The method raises 'ValueChanged' event to fire up the event delegates.
* If you override this method, be sure to call the parent implementation
* so that the event delegates can be invoked.
* @param TEventParameter event parameter to be passed to the event handlers
*/
public function onValueChanged($param)
{
$this->raiseEvent('ValueChanged',$this,$param);
}
}
?>
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