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<?php
/**
* TRadioButton class file
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005 PradoSoft
* @license http://www.pradosoft.com/license/
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
*/
/**
* Using TCheckBox parent class
*/
Prado::using('System.Web.UI.WebControls.TCheckBox');
/**
* Using TRadioButtonList class
*/
Prado::using('System.Web.UI.WebControls.TRadioButtonList');
/**
* TRadioButton class
*
* TRadioButton displays a radio button on the page.
* You can specify the caption to display beside the radio buttonby setting
* the {@link setText Text} property. The caption can appear either on the right
* or left of the radio button, which is determined by the {@link setTextAlign TextAlign}
* property.
*
* To determine whether the TRadioButton component is checked, test the {@link getChecked Checked}
* property. The {@link onCheckedChanged OnCheckedChanged} event is raised when
* the {@link getChecked Checked} state of the TRadioButton component changes
* between posts to the server. You can provide an event handler for
* the {@link onCheckedChanged OnCheckedChanged} event to to programmatically
* control the actions performed when the state of the TRadioButton component changes
* between posts to the server.
*
* TRadioButton uses {@link setGroupName GroupName} to group together a set of radio buttons.
*
* If {@link setAutoPostBack AutoPostBack} is set true, changing the radio button state
* will cause postback action. And if {@link setCausesValidation CausesValidation}
* is true, validation will also be processed, which can be further restricted within
* a {@link setValidationGroup ValidationGroup}.
*
* Note, {@link setText Text} is rendered as is. Make sure it does not contain unwanted characters
* that may bring security vulnerabilities.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Revision: $ $Date: $
* @package System.Web.UI.WebControls
* @since 3.0
*/
class TRadioButton extends TCheckBox
{
/**
* @var string the name used to fetch radiobutton post data
*/
private $_uniqueGroupName=null;
/**
* Loads user input data.
* This method is primarly used by framework developers.
* @param string the key that can be used to retrieve data from the input data collection
* @param array the input data collection
* @return boolean whether the data of the control has been changed
*/
public function loadPostData($key,$values)
{
$uniqueGroupName=$this->getUniqueGroupName();
$value=isset($values[$uniqueGroupName])?$values[$uniqueGroupName]:null;
if($value!==null && $value===$this->getValueAttribute())
{
if(!$this->getChecked())
{
$this->setChecked(true);
return true;
}
else
return false;
}
else if($this->getChecked())
$this->setChecked(false);
return false;
}
/**
* @return string the name of the group that the radio button belongs to. Defaults to empty.
*/
public function getGroupName()
{
return $this->getViewState('GroupName','');
}
/**
* Sets the name of the group that the radio button belongs to
* @param string the group name
*/
public function setGroupName($value)
{
$this->setViewState('GroupName',$value,'');
}
/**
* @return string the name used to fetch radiobutton post data
*/
private function getUniqueGroupName()
{
if($this->_uniqueGroupName===null)
{
$groupName=$this->getGroupName();
$uniqueID=$this->getUniqueID();
if($uniqueID!=='')
{
if(($pos=strrpos($uniqueID,TControl::ID_SEPARATOR))!==false)
{
if($groupName!=='')
$groupName=substr($uniqueID,0,$pos+1).$groupName;
else if($this->getNamingContainer() instanceof TRadioButtonList)
$groupName=substr($uniqueID,0,$pos);
}
if($groupName==='')
$groupName=$uniqueID;
}
$this->_uniqueGroupName=$groupName;
}
return $this->_uniqueGroupName;
}
/**
* Renders a radiobutton input element.
* @param THtmlWriter the writer for the rendering purpose
* @param string checkbox id
* @param string onclick attribute value for the checkbox
*/
protected function renderInputTag($writer,$clientID,$onclick)
{
if($clientID!=='')
$writer->addAttribute('id',$clientID);
$writer->addAttribute('type','radio');
$writer->addAttribute('name',$this->getUniqueGroupName());
$writer->addAttribute('value',$this->getValueAttribute());
if($this->getChecked())
$writer->addAttribute('checked','checked');
if(!$this->getEnabled(true))
$writer->addAttribute('disabled','disabled');
$page=$this->getPage();
if($this->getAutoPostBack() && $page->getClientSupportsJavaScript())
$page->getClientScript()->registerPostBackControl($this);
if(($accesskey=$this->getAccessKey())!=='')
$writer->addAttribute('accesskey',$accesskey);
if(($tabindex=$this->getTabIndex())>0)
$writer->addAttribute('tabindex',"$tabindex");
if($attributes=$this->getViewState('InputAttributes',null))
$writer->addAttributes($attributes);
$writer->renderBeginTag('input');
$writer->renderEndTag();
}
}
?>
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