<?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 $Id$ * @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. * Once the {@link setGroupName GroupName} is set, you can use the {@link getRadioButtonsInGroup} * method to get an array of TRadioButtons having the same group name. * * 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 $Id$ * @package System.Web.UI.WebControls * @since 3.0 */ class TRadioButton extends TCheckBox { /** * @param array list of radio buttons that are on the current page hierarchy */ private static $_activeButtons=array(); /** * @var integer number of radio buttons created */ private static $_buttonCount=0; /** * @var integer global ID of this radiobutton */ private $_globalID; /** * @var string previous UniqueID (used to calculate UniqueGroup) */ private $_previousUniqueID=null; /** * @var string the name used to fetch radiobutton post data */ private $_uniqueGroupName=null; /** * Constructor. * Registers the radiobutton in a global radiobutton collection. * If overridden, the parent implementation must be invoked first. */ public function __construct() { parent::__construct(); $this->_globalID = self::$_buttonCount++; } /** * Registers the radio button groupings. If overriding onInit method, * ensure to call parent implemenation. * @param TEventParameter event parameter to be passed to the event handlers */ public function onInit($param) { parent::onInit($param); self::$_activeButtons[$this->_globalID]=$this; } /** * Unregisters the radio button groupings. If overriding onInit method, * ensure to call parent implemenation. * @param TEventParameter event parameter to be passed to the event handlers */ public function onUnLoad($param) { unset(self::$_activeButtons[$this->_globalID]); parent::onUnLoad($param); } /** * Loads user input data. * This method is primarly used by framework developers. * @param string the key that can be used to retrieve data from the input data collection * @param array the input data collection * @return boolean whether the data of the control has been changed */ public function loadPostData($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 $this->getViewState('GroupName',''); } /** * Sets the name of the group that the radio button belongs to. * The group is unique among the control's naming container. * @param string the group name * @see setUniqueGroupName */ public function setGroupName($value) { $this->setViewState('GroupName',$value,''); $this->_uniqueGroupName=null; } /** * @return string the name used to fetch radiobutton post data */ public function getUniqueGroupName() { if(($groupName=$this->getViewState('UniqueGroupName',''))!=='') return $groupName; else if(($uniqueID=$this->getUniqueID())!==$this->_previousUniqueID || $this->_uniqueGroupName===null) { $groupName=$this->getGroupName(); $this->_previousUniqueID=$uniqueID; 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 $this->_uniqueGroupName; } /** * Sets the unique group name that the radio button belongs to. * A unique group is a radiobutton group unique among the whole page hierarchy, * while the {@link setGroupName GroupName} specifies a group that is unique * among the control's naming container only. * For example, each cell of a {@link TDataGrid} is a naming container. * If you specify {@link setGroupName GroupName} for a radiobutton in a cell, * it groups together radiobutton within a cell, but not the other, even though * they have the same {@link setGroupName GroupName}. * On the contratry, if {@link setUniqueGroupName UniqueGroupName} is used instead, * it will group all appropriate radio buttons on the whole page hierarchy. * Note, when both {@link setUniqueGroupName UniqueGroupName} and * {@link setGroupName GroupName}, the former takes precedence. * @param string the group name * @see setGroupName */ public function setUniqueGroupName($value) { $this->setViewState('UniqueGroupName',$value,''); } /** * Gets an array of radiobuttons whose group name is the same as this radiobutton's. * Note, only those radiobuttons that are on the current page hierarchy may be * returned in the result. * @return array list of TRadioButton with the same group */ public function getRadioButtonsInGroup() { $group = $this->getUniqueGroupName(); $buttons = array(); foreach(self::$_activeButtons as $control) { if($control->getUniqueGroupName() === $group) $buttons[] = $control; } return $buttons; } /** * @return string the value attribute to be rendered */ protected function getValueAttribute() { if(($value=parent::getValueAttribute())==='') return $this->getUniqueID(); else return $value; } /** * Renders a radiobutton input element. * @param THtmlWriter the writer for the rendering purpose * @param string checkbox id * @param string onclick js */ protected function renderInputTag($writer,$clientID,$onclick) { if($clientID!=='') $writer->addAttribute('id',$clientID); $writer->addAttribute('type','radio'); $writer->addAttribute('name',$this->getUniqueGroupName()); $writer->addAttribute('value',$this->getValueAttribute()); if($onclick!=='') $writer->addAttribute('onclick',$onclick); if($this->getChecked()) $writer->addAttribute('checked','checked'); if(!$this->getEnabled(true)) $writer->addAttribute('disabled','disabled'); $page=$this->getPage(); if($this->getEnabled(true) && $this->getAutoPostBack() && $page->getClientSupportsJavaScript()) $this->renderClientControlScript($writer); 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'); $writer->renderEndTag(); } /** * Renders the client-script code. */ protected function renderClientControlScript($writer) { $cs = $this->getPage()->getClientScript(); $cs->registerPostBackControl($this->getClientClassName(),$this->getPostBackOptions()); } /** * Gets the name of the javascript class responsible for performing postback for this control. * This method overrides the parent implementation. * @return string the javascript class name */ protected function getClientClassName() { return 'Prado.WebUI.TRadioButton'; } } ?>