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<?php
/**
* TActiveCheckBox class file.
*
* @author Wei Zhuo <weizhuo[at]gamil[dot]com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2006 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Revision: $ : $
* @package System.Web.UI.ActiveControls
*/
/**
* TActiveCheckBox class.
*
* The active control counter part to checkbox. The {@link setAutoPostBack AutoPostBack}
* property is set to true by default. Thus, when the checkbox is clicked a
* {@link onCallback OnCallback} event is raise after {@link OnCheckedChanged} event.
*
* The {@link setText Text} and {@link setChecked Checked} properties can be
* changed during a callback.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @version : $ Tue Jun 20 01:29:35 EST 2006 $
* @package System.Web.UI.ActiveControls
* @since 3.0
*/
class TActiveCheckBox extends TCheckBox 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, by calling this constructor.
*/
public function __construct()
{
parent::__construct();
$this->setAdapter(new TActiveControlAdapter($this));
$this->setAutoPostBack(true);
}
/**
* @return TBaseActiveCallbackControl standard callback control options.
*/
public function getActiveControl()
{
return $this->getAdapter()->getBaseActiveControl();
}
/**
* Raises the callback event. This method is required by {@link
* ICallbackEventHandler} interface. If {@link getCausesValidation
* CausesValidation} is true, it will invoke the page's {@link TPage::
* validate validate} method first. It will raise {@link onCheckedChanged
* OnCheckedChanged} event first and then the {@link onCallback OnCallback} event.
* This method is mainly used by framework and control developers.
* @param TCallbackEventParameter the event parameter
*/
public function raiseCallbackEvent($param)
{
$this->raisePostDataChangedEvent($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, $param);
}
/**
* Updates the button text on the client-side if the
* {@link setEnableUpdate EnableUpdate} property is set to true.
* @param string caption of the button
*/
public function setText($value)
{
parent::setText($value);
if($this->getActiveControl()->canUpdateClientSide())
$this->getPage()->getCallbackClient()->update(
$this->getDefaultLabelID(), $value);
}
/**
* Sets a value indicating whether the checkbox is to be checked or not.
* Updates checkbox checked state on the client-side if the
* {@link setEnableUpdate EnableUpdate} property is set to true.
* @param boolean whether the checkbox is to be checked or not.
*/
public function setChecked($value)
{
$value = TPropertyValue::ensureBoolean($value);
parent::setChecked($value);
if($this->getActiveControl()->canUpdateClientSide())
$this->getPage()->getCallbackClient()->check($this, $value);
}
/**
* Registers the javascript code for initializing the active control.
*/
protected function renderClientControlScript($writer)
{
$this->getActiveControl()->registerCallbackClientScript(
$this->getClientClassName(), $this->getPostBackOptions());
}
/**
* @return string corresponding javascript class name for this TActiveCheckBox.
*/
protected function getClientClassName()
{
return 'Prado.WebUI.TActiveCheckBox';
}
/**
* Overrides parent implementation to ensure label has ID.
* @return TMap list of attributes to be rendered for label beside the checkbox
*/
public function getLabelAttributes()
{
$attributes = parent::getLabelAttributes();
$attributes['id'] = $this->getDefaultLabelID();
return $attributes;
}
/**
* Renders a label beside the checkbox.
* @param THtmlWriter the writer for the rendering purpose
* @param string checkbox id
* @param string label text
*/
protected function renderLabel($writer,$clientID,$text)
{
$writer->addAttribute('id', $this->getDefaultLabelID());
parent::renderLabel($writer, $clientID, $text);
}
/**
* @return string checkbox label ID;
*/
protected function getDefaultLabelID()
{
if($attributes=$this->getViewState('LabelAttributes',null))
return $this->getLabelAttributes()->itemAt('id');
else
return $this->getClientID().'_label';
}
}
?>
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