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<?php
/**
* TControl, TControlCollection, TEventParameter and INamingContainer class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package Prado\Web\UI
*/
namespace Prado\Web\UI;
use Prado\Exceptions\TInvalidDataTypeException;
/**
* TControlCollection class
*
* TControlCollection implements a collection that enables
* controls to maintain a list of their child controls.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package Prado\Web\UI
* @since 3.0
*/
class TControlCollection extends \Prado\Collections\TList
{
/**
* the control that owns this collection.
* @var TControl
*/
private $_o;
/**
* Constructor.
* @param TControl the control that owns this collection.
* @param boolean whether the list is read-only
*/
public function __construct(TControl $owner,$readOnly=false)
{
$this->_o=$owner;
parent::__construct(null,$readOnly);
}
/**
* @return TControl the control that owns this collection.
*/
protected function getOwner()
{
return $this->_o;
}
/**
* Inserts an item at the specified position.
* This overrides the parent implementation by performing additional
* operations for each newly added child control.
* @param integer the speicified position.
* @param mixed new item
* @throws TInvalidDataTypeException if the item to be inserted is neither a string nor a TControl.
*/
public function insertAt($index,$item)
{
if($item instanceof TControl)
{
parent::insertAt($index,$item);
$this->_o->addedControl($item);
}
else if(is_string($item) || ($item instanceof IRenderable))
parent::insertAt($index,$item);
else
throw new TInvalidDataTypeException('controlcollection_control_required');
}
/**
* Removes an item at the specified position.
* This overrides the parent implementation by performing additional
* cleanup work when removing a child control.
* @param integer the index of the item to be removed.
* @return mixed the removed item.
*/
public function removeAt($index)
{
$item=parent::removeAt($index);
if($item instanceof TControl)
$this->_o->removedControl($item);
return $item;
}
/**
* Overrides the parent implementation by invoking {@link TControl::clearNamingContainer}
*/
public function clear()
{
parent::clear();
if($this->_o instanceof INamingContainer)
$this->_o->clearNamingContainer();
}
}
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