<?php /** * TActiveImageButton class file. * * @author Wei Zhuo <weizhuo[at]gamil[dot]com> * @link http://www.pradosoft.com/ * @copyright Copyright © 2005-2014 PradoSoft * @license http://www.pradosoft.com/license/ * @package System.Web.UI.ActiveControls */ /** * TActiveImageButton class. * * TActiveImageButton is the active control counter part to TImageButton. * When a TActiveImageButton is clicked, rather than a normal post back request a * callback request is initiated. * * The {@link onCallback OnCallback} event is raised during a callback request * and it is raise <b>after</b> the {@link onClick OnClick} event. * * @author Wei Zhuo <weizhuo[at]gmail[dot]com> * @package System.Web.UI.ActiveControls * @since 3.1 */ class TActiveImageButton extends TImageButton 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)); } /** * @return TBaseActiveControl basic active control options. */ public function getActiveControl() { return $this->getAdapter()->getBaseActiveControl(); } /** * @return TCallbackClientSide client side request options. */ public function getClientSide() { return $this->getAdapter()->getBaseActiveControl()->getClientSide(); } /** * Sets the alternative text to be displayed in the TImage when the image is unavailable. * @param string the alternative text */ public function setAlternateText($value) { parent::setAlternateText($value); if($this->getActiveControl()->canUpdateClientSide()) $this->getPage()->getCallbackClient()->setAttribute($this, 'alt', $value); } /** * Sets the alignment of the image with respective to other elements on the page. * Possible values include: absbottom, absmiddle, baseline, bottom, left, * middle, right, texttop, and top. If an empty string is passed in, * imagealign attribute will not be rendered. * @param string the alignment of the image */ public function setImageAlign($value) { parent::setImageAlign($value); if($this->getActiveControl()->canUpdateClientSide()) $this->getPage()->getCallbackClient()->setAttribute($this, 'align', $value); } /** * @param string the URL of the image file */ public function setImageUrl($value) { parent::setImageUrl($value); if($this->getActiveControl()->canUpdateClientSide()) $this->getPage()->getCallbackClient()->setAttribute($this, 'src', $value); } /** * @param string the URL to the long description of the image. */ public function setDescriptionUrl($value) { parent::setDescriptionUrl($value); if($this->getActiveControl()->canUpdateClientSide()) $this->getPage()->getCallbackClient()->setAttribute($this, 'longdesc', $value); } /** * Raises the callback event. This method is required by * {@link ICallbackEventHandler ICallbackEventHandler} interface. If * {@link getCausesValidation CausesValidation} is true, it will invoke the page's * {@link TPage::validate} method first. It will raise * {@link onClick OnClick} event first and then the {@link onCallback OnCallback} event. * This method is mainly used by framework and control developers. * @param TCallbackEventParameter the event parameter */ public function raiseCallbackEvent($param) { $this->raisePostBackEvent($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, $param); } /** * Override parent implementation, no javascript is rendered here instead * the javascript required for active control is registered in {@link addAttributesToRender}. */ protected function renderClientControlScript($writer) { } /** * Ensure that the ID attribute is rendered and registers the javascript code * for initializing the active control. */ protected function addAttributesToRender($writer) { parent::addAttributesToRender($writer); $writer->addAttribute('id',$this->getClientID()); $this->getActiveControl()->registerCallbackClientScript( $this->getClientClassName(), $this->getPostBackOptions()); } /** * @return string corresponding javascript class name for this TActiveLinkButton. */ protected function getClientClassName() { return 'Prado.WebUI.TActiveImageButton'; } }