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<?php
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/**
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* TContentPlaceHolder class file.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.pradosoft.com/
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* @copyright Copyright © 2005-2008 PradoSoft
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* @license http://www.pradosoft.com/license/
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* @version $Id: TContentPlaceHolder.php 2541 2008-10-21 15:05:13Z qiang.xue $
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* @package System.Web.UI.WebControls
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*/
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/**
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* TContentPlaceHolder class
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*
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* TContentPlaceHolder reserves a place on a template where a {@link TContent}
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* control can inject itself and its children in. TContentPlaceHolder and {@link TContent}
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* together implement a decoration pattern for prado templated controls.
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* A template control (called content control) can specify a master control
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* whose template contains some TContentPlaceHolder controls.
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* {@link TContent} controls on the content control's template will replace the corresponding
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* {@link TContentPlaceHolder} controls on the master control's template.
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* This is called content injection. It is done by matching the IDs of
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* {@link TContent} and {@link TContentPlaceHolder} controls.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @version $Id: TContentPlaceHolder.php 2541 2008-10-21 15:05:13Z qiang.xue $
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* @package System.Web.UI.WebControls
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* @since 3.0
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*/
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class TContentPlaceHolder extends TControl
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{
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/**
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* This method is invoked after the control is instantiated on a template.
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* This overrides the parent implementation by registering the content placeholder
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* control to the template owner control. The placeholder control will NOT
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* be added to the potential parent control!
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* @param TControl potential parent of this control
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*/
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public function createdOnTemplate($parent)
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{
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if(($id=$this->getID())==='')
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throw new TConfigurationException('contentplaceholder_id_required');
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$this->getTemplateControl()->registerContentPlaceHolder($id,$this);
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$parent->getControls()->add($this);
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}
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}
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