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<?php
/**
* TActiveListBox class file.
*
* @author Wei Zhuo <weizhuo[at]gamil[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2011 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Id$
* @package System.Web.UI.ActiveControls
*/
/**
* TActiveListBox class.
*
* List items can be added dynamically during a callback request.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @version $Id$
* @package System.Web.UI.ActiveControls
* @since 3.1
*/
class TActiveListBox extends TListBox implements IActiveControl, ICallbackEventHandler
{
/**
* Creates a new callback control, sets the adapter to
* TActiveListControlAdapter. If you override this class, be sure to set the
* adapter appropriately by, for example, by calling this constructor.
*/
public function __construct()
{
parent::__construct();
$this->setAdapter(new TActiveListControlAdapter($this));
$this->setAutoPostBack(true);
}
/**
* @return TBaseActiveCallbackControl standard callback control options.
*/
public function getActiveControl()
{
return $this->getAdapter()->getBaseActiveControl();
}
/**
* @return TCallbackClientSide client side request options.
*/
public function getClientSide()
{
return $this->getAdapter()->getBaseActiveControl()->getClientSide();
}
/**
* Creates a collection object to hold list items. A specialized
* TActiveListItemCollection is created to allow the drop down list options
* to be added.
* This method may be overriden to create a customized collection.
* @return TActiveListItemCollection the collection object
*/
protected function createListItemCollection()
{
$collection = new TActiveListItemCollection;
$collection->setControl($this);
return $collection;
}
/**
* Javascript client class for this control.
* This method overrides the parent implementation.
* @return null no javascript class name.
*/
protected function getClientClassName()
{
return 'Prado.WebUI.TActiveListBox';
}
/**
* Sets the selection mode of the list control (Single, Multiple)
* on the client-side if the {@link setEnableUpdate EnableUpdate}
* property is set to true.
* @param string the selection mode
*/
public function setSelectionMode($value)
{
parent::setSelectionMode($value);
$multiple = $this->getIsMultiSelect();
$id = $this->getUniqueID(); $multi_id = $id.'[]';
if($multiple)
$this->getPage()->registerPostDataLoader($multi_id);
if($this->getActiveControl()->canUpdateClientSide())
{
$client = $this->getPage()->getCallbackClient();
$client->setAttribute($this, 'multiple', $multiple ? 'multiple' : false);
$client->setAttribute($this, 'name', $multiple ? $multi_id : $id);
if($multiple)
$client->addPostDataLoader($multi_id);
}
}
/**
* Raises the callback event. This method is required by {@link
* ICallbackEventHandler} interface.
* This method is mainly used by framework and control developers.
* @param TCallbackEventParameter the event parameter
*/
public function raiseCallbackEvent($param)
{
$this->onCallback($param);
}
/**
* This method is invoked when a callback is requested. The method raises
* 'OnCallback' event to fire up the event handlers. If you override this
* method, be sure to call the parent implementation so that the event
* handler can be invoked.
* @param TCallbackEventParameter event parameter to be passed to the event handlers
*/
public function onCallback($param)
{
$this->raiseEvent('OnCallback', $this, $param);
}
/**
* Updates the client-side options if the item list has changed after the OnLoad event.
*/
public function onPreRender($param)
{
parent::onPreRender($param);
$this->getAdapter()->updateListItems();
$multiple = $this->getIsMultiSelect();
$id = $this->getUniqueID(); $multi_id = $id.'[]';
if($multiple)
$this->getPage()->registerPostDataLoader($multi_id);
}
/**
* Override parent implementation, no javascript is rendered here instead
* the javascript required for active control is registered in {@link addAttributesToRender}.
*/
protected function renderClientControlScript($writer)
{
}
/**
* Ensure that the ID attribute is rendered and registers the javascript code
* for initializing the active control.
*/
protected function addAttributesToRender($writer)
{
parent::addAttributesToRender($writer);
$writer->addAttribute('id',$this->getClientID());
if ($this->getAutoPostBack())
$this->getActiveControl()->registerCallbackClientScript(
$this->getClientClassName(), $this->getPostBackOptions());
}
}
?>
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