3 * TContentPlaceHolder class file.
5 * @author Qiang Xue <qiang.xue@gmail.com>
6 * @link http://www.pradosoft.com/
7 * @copyright Copyright © 2005-2013 PradoSoft
8 * @license http://www.pradosoft.com/license/
9 * @version $Id: TContentPlaceHolder.php 3245 2013-01-07 20:23:32Z ctrlaltca $
10 * @package System.Web.UI.WebControls
14 * TContentPlaceHolder class
16 * TContentPlaceHolder reserves a place on a template where a {@link TContent}
17 * control can inject itself and its children in. TContentPlaceHolder and {@link TContent}
18 * together implement a decoration pattern for prado templated controls.
19 * A template control (called content control) can specify a master control
20 * whose template contains some TContentPlaceHolder controls.
21 * {@link TContent} controls on the content control's template will replace the corresponding
22 * {@link TContentPlaceHolder} controls on the master control's template.
23 * This is called content injection. It is done by matching the IDs of
24 * {@link TContent} and {@link TContentPlaceHolder} controls.
26 * @author Qiang Xue <qiang.xue@gmail.com>
27 * @version $Id: TContentPlaceHolder.php 3245 2013-01-07 20:23:32Z ctrlaltca $
28 * @package System.Web.UI.WebControls
31 class TContentPlaceHolder extends TControl
34 * This method is invoked after the control is instantiated on a template.
35 * This overrides the parent implementation by registering the content placeholder
36 * control to the template owner control. The placeholder control will NOT
37 * be added to the potential parent control!
38 * @param TControl potential parent of this control
40 public function createdOnTemplate($parent)
42 if(($id=$this->getID())==='')
43 throw new TConfigurationException('contentplaceholder_id_required');
44 $this->getTemplateControl()->registerContentPlaceHolder($id,$this);
45 $parent->getControls()->add($this);