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<?php
/**
* TActiveRadioButton class file.
*
* @author Wei Zhuo <weizhuo[at]gamil[dot]com>
* @link https://github.com/pradosoft/prado
* @copyright Copyright © 2005-2015 The PRADO Group
* @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
* @package System.Web.UI.ActiveControls
*/
/**
* TActiveRadioButton class.
*
* The active control counter part to radio button. The {@link setAutoPostBack AutoPostBack}
* property is set to true by default. Thus, when the radio button 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.
*
* The {@link setGroupName GroupName} property may <b>NOT</b> be changed
* during callback because the client-side <tt>name</tt> attribute is read-only
* and can not be changed using javascript.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @package System.Web.UI.ActiveControls
* @since 3.1
*/
class TActiveRadioButton extends TRadioButton implements IActiveControl, ICallbackEventHandler
{
/**
* 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();
}
/**
* @return TCallbackClientSide client side request options.
*/
public function getClientSide()
{
return $this->getAdapter()->getBaseActiveControl()->getClientSide();
}
/**
* Raises the callback event. This method is required by {@link
* ICallbackEventHandler} interface.
* This method is mainly used by framework and control developers.
* @param TCallbackEventParameter the event parameter
*/
public function raiseCallbackEvent($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, $param);
}
/**
* Updates the button text on the client-side if the
* {@link setEnableUpdate EnableUpdate} property is set to true.
* @param string caption of the button
*/
public function setText($value)
{
if(parent::getText() === $value)
return;
parent::setText($value);
if($this->getActiveControl()->canUpdateClientSide())
$this->getPage()->getCallbackClient()->update(
$this->getDefaultLabelID(), $value);
}
/**
* Checks the radio button.
* Updates radio button checked state on the client-side if the
* {@link setEnableUpdate EnableUpdate} property is set to true.
* @param boolean whether the radio button is to be checked or not.
*/
public function setChecked($value)
{
$value = TPropertyValue::ensureBoolean($value);
if(parent::getChecked() === $value)
return;
parent::setChecked($value);
if($this->getActiveControl()->canUpdateClientSide())
$this->getPage()->getCallbackClient()->check($this, $value);
}
/**
* Override parent implementation, no javascript is rendered here instead
* the javascript required for active control is registered in {@link addAttributesToRender}.
*/
protected function renderClientControlScript($writer)
{
}
/**
* Ensure that the ID attribute is rendered and registers the javascript code
* for initializing the active control.
* Since 3.1.4, the javascript code is not rendered if {@link setAutoPostBack AutoPostBack} is false
*
*/
protected function renderInputTag($writer,$clientID,$onclick)
{
parent::renderInputTag($writer,$clientID,$onclick);
if ($this->getAutoPostBack())
$this->getActiveControl()->registerCallbackClientScript(
$this->getClientClassName(), $this->getPostBackOptions());
}
/**
* @return string corresponding javascript class name for this TActiveRadioButton.
*/
protected function getClientClassName()
{
return 'Prado.WebUI.TActiveRadioButton';
}
/**
* Overrides parent implementation to ensure label has ID.
* @return TMap list of attributes to be rendered for label beside the radio button
*/
public function getLabelAttributes()
{
$attributes = parent::getLabelAttributes();
$attributes['id'] = $this->getDefaultLabelID();
return $attributes;
}
/**
* Renders a label beside the radio button.
* @param THtmlWriter the writer for the rendering purpose
* @param string radio button id
* @param string label text
*/
protected function renderLabel($writer,$clientID,$text)
{
$writer->addAttribute('id', $this->getDefaultLabelID());
parent::renderLabel($writer, $clientID, $text);
}
/**
* @return string radio button label ID;
*/
protected function getDefaultLabelID()
{
if($attributes=$this->getViewState('LabelAttributes',null))
return $this->getLabelAttributes()->itemAt('id');
else
return $this->getClientID().'_label';
}
}
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