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<?php
/**
* TCallback class file.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @link https://github.com/pradosoft/prado
* @copyright Copyright © 2005-2016 The PRADO Group
* @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
* @package System.Web.UI.ActiveControls
*/
/**
* Load active control adapter.
*/
Prado::using('System.Web.UI.ActiveControls.TActiveControlAdapter');
/**
* TCallback component class.
*
* The TCallback provides a basic callback handler that can be invoked from the
* client side by running the javascript code obtained from the
* {@link TBaseActiveCallbackControl::getJavascript ActiveControl.Javascript} property.
* The event {@link onCallback OnCallback} is raised when a callback is requested made.
*
* Example usage:
* <code>
* <com:TCallback ID="callback1" OnCallback="callback1_Requested" />
* <script type="text/javascript">
* function do_callback1()
* {
* var request = <%= $this->callback1->ActiveControl->Javascript %>;
* request.dispatch();
* }
* </script>
* <div onclick="do_callback1()">Click Me!</div>
* </code>
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @package System.Web.UI.ActiveControls
* @since 3.1
*/
class TCallback extends TControl implements ICallbackEventHandler, IActiveControl
{
/**
* Creates a new callback control, sets the adapter to
* TActiveControlAdapter. If you override this class, be sure to set the
* adapter appropriately by, for example, call this constructor.
*/
public function __construct()
{
parent::__construct();
$this->setAdapter(new TActiveControlAdapter($this));
}
/**
* @return TBaseActiveCallbackControl standard callback options.
*/
public function getActiveControl()
{
return $this->getAdapter()->getBaseActiveControl();
}
/**
* @return TCallbackClientSide client side request options.
*/
public function getClientSide()
{
return $this->getAdapter()->getBaseActiveControl()->getClientSide();
}
/**
* Raises the callback event. This method is required by
* {@link ICallbackEventHandler ICallbackEventHandler} interface. If
* {@link getCausesValidation ActiveControl.CausesValidation} is true,
* it will invoke the page's {@link TPage::validate validate} method first.
* It will raise {@link onCallback OnCallback} event. This method is mainly
* used by framework and control developers.
* @param TCallbackEventParameter the event parameter
*/
public function raiseCallbackEvent($param)
{
if($this->getActiveControl()->canCauseValidation())
$this->getPage()->validate($this->getActiveControl()->getValidationGroup());
$this->onCallback($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);
}
}
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