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<?php
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/**
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 * TActivePanel file.
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 *
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 * @author Wei Zhuo <weizhuo[at]gamil[dot]com>
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 * @link http://www.pradosoft.com/
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 * @copyright Copyright &copy; 2005-2008 PradoSoft
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 * @license http://www.pradosoft.com/license/
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 * @version $Id: TActivePanel.php 2541 2008-10-21 15:05:13Z qiang.xue $
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 * @package System.Web.UI.ActiveControls
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 */
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/**
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 * Load active control adapter.
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 */
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Prado::using('System.Web.UI.ActiveControls.TActiveControlAdapter');
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/**
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 * TActivePanel is the TPanel active control counterpart.
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 *
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 * TActivePanel allows the client-side panel contents to be updated during a
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 * callback response using the {@link flush} method.
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 *
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 * Example: Assume $param is an instance of TCallbackEventParameter attached to
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 * the OnCallback event a TCallback with ID "callback1", and
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 * "panel1" is the ID of a TActivePanel.
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 * <code>
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 * function callback1_requested($sender, $param)
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 * {
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 * 	   $this->panel1->render($param->getNewWriter());
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 * }
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 * </code>
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 *
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 * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
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 * @version $Id: TActivePanel.php 2541 2008-10-21 15:05:13Z qiang.xue $
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 * @package System.Web.UI.ActiveControls
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 * @since 3.1
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 */
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class TActivePanel extends TPanel implements IActiveControl
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{
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	/**
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	 * Creates a new callback control, sets the adapter to
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	 * TActiveControlAdapter. If you override this class, be sure to set the
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	 * adapter appropriately by, for example, by calling this constructor.
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	 */
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	public function __construct()
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	{
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		parent::__construct();
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		$this->setAdapter(new TActiveControlAdapter($this));
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	}
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	/**
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	 * @return TBaseActiveControl standard active control options.
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	 */
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	public function getActiveControl()
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	{
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		return $this->getAdapter()->getBaseActiveControl();
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	}
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	/**
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	 * Renders and replaces the panel's content on the client-side.
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	 * When render() is called before the OnPreRender event, such as when render()
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	 * is called during a callback event handler, the rendering
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	 * is defered until OnPreRender event is raised.
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	 * @param THtmlWriter html writer
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	 */
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	public function render($writer)
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	{
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		if($this->getHasPreRendered())
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		{
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			parent::render($writer);
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			if($this->getActiveControl()->canUpdateClientSide())
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				$this->getPage()->getCallbackClient()->replaceContent($this,$writer);
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		}
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		else
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		{
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			$this->getPage()->getAdapter()->registerControlToRender($this,$writer);
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			if ($this->getHasControls())
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			{
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				// If we update a TActivePanel on callback,
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				// We shouldn't update all childs, because the whole content will be replaced by
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				// the parent
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				foreach ($this->findControlsByType('IActiveControl', false) as $control)
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				{
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						$control->getActiveControl()->setEnableUpdate(false);
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				}
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			}
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		}
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	}
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}
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