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<?php
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/**
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* TForm class file
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @link http://www.pradosoft.com/
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* @copyright Copyright © 2005-2008 PradoSoft
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* @license http://www.pradosoft.com/license/
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* @version $Id: TForm.php 2541 2008-10-21 15:05:13Z qiang.xue $
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* @package System.Web.UI
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*/
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/**
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* TForm class
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*
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* TForm displays an HTML form. Besides regular body content,
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* it displays hidden fields, javascript blocks and files that are registered
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* through {@link TClientScriptManager}.
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*
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* A TForm is required for a page that needs postback.
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* Each page can contain at most one TForm. If multiple HTML forms are needed,
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* please use regular HTML form tags for those forms that post to different
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* URLs.
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*
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* @author Qiang Xue <qiang.xue@gmail.com>
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* @version $Id: TForm.php 2541 2008-10-21 15:05:13Z qiang.xue $
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* @package System.Web.UI
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* @since 3.0
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*/
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class TForm extends TControl
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{
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/**
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* Registers the form with the page.
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* @param mixed event parameter
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*/
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public function onInit($param)
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{
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parent::onInit($param);
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$this->getPage()->setForm($this);
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}
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/**
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* Adds form specific attributes to renderer.
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* @param THtmlWriter writer
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*/
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protected function addAttributesToRender($writer)
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{
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$writer->addAttribute('id',$this->getClientID());
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$writer->addAttribute('method',$this->getMethod());
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$uri=$this->getRequest()->getRequestURI();
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$writer->addAttribute('action',str_replace('&','&',str_replace('&','&',$uri)));
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if(($enctype=$this->getEnctype())!=='')
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$writer->addAttribute('enctype',$enctype);
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$attributes=$this->getAttributes();
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$attributes->remove('action');
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$writer->addAttributes($attributes);
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if(($butt=$this->getDefaultButton())!=='')
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{
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if(($button=$this->findControl($butt))!==null)
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$this->getPage()->getClientScript()->registerDefaultButton($this, $button);
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else
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throw new TInvalidDataValueException('form_defaultbutton_invalid',$butt);
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}
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}
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/**
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* Renders the form.
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* @param THtmlWriter writer
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*/
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public function render($writer)
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{
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$page=$this->getPage();
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$page->beginFormRender($writer);
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$textWriter=new TTextWriter;
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$this->renderChildren(new THtmlWriter($textWriter));
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$content=$textWriter->flush();
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$page->endFormRender($writer);
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$this->addAttributesToRender($writer);
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$writer->renderBeginTag('form');
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$cs=$page->getClientScript();
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if($page->getClientSupportsJavaScript())
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{
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$cs->renderHiddenFields($writer);
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$cs->renderScriptFiles($writer);
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$cs->renderBeginScripts($writer);
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$writer->write($content);
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$cs->renderEndScripts($writer);
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}
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else
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{
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$cs->renderHiddenFields($writer);
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$writer->write($content);
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}
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$writer->renderEndTag();
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}
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/**
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* @return string id path to the default button control.
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*/
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public function getDefaultButton()
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{
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return $this->getViewState('DefaultButton','');
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}
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/**
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* Sets a button to be default one in a form.
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* A default button will be clicked if a user presses 'Enter' key within
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* the form.
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* @param string id path to the default button control.
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*/
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public function setDefaultButton($value)
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{
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$this->setViewState('DefaultButton',$value,'');
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}
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/**
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* @return string form submission method. Defaults to 'post'.
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*/
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public function getMethod()
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{
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return $this->getViewState('Method','post');
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}
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/**
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* @param string form submission method. Valid values include 'post' and 'get'.
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*/
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public function setMethod($value)
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{
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$this->setViewState('Method',TPropertyValue::ensureEnum($value,'post','get'),'post');
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}
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/**
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* @return string the encoding type a browser uses to post data back to the server
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*/
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public function getEnctype()
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{
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return $this->getViewState('Enctype','');
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}
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/**
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* @param string the encoding type a browser uses to post data back to the server.
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* Commonly used types include
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* - application/x-www-form-urlencoded : Form data is encoded as name/value pairs. This is the standard encoding format.
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* - multipart/form-data : Form data is encoded as a message with a separate part for each control on the page.
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* - text/plain : Form data is encoded in plain text, without any control or formatting characters.
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*/
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public function setEnctype($value)
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{
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$this->setViewState('Enctype',$value,'');
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}
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/**
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* @return string form name, which is equal to {@link getUniqueID UniqueID}.
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*/
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public function getName()
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{
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return $this->getUniqueID();
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}
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}
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