Subversion-Projekte lars-tiefland.prado

<?php
/**
 * TActiveButton class file.
 *
 * @author Wei Zhuo <weizhuo[at]gamil[dot]com>
 * @link http://www.pradosoft.com/
 * @copyright Copyright &copy; 2005-2008 PradoSoft
 * @license http://www.pradosoft.com/license/
 * @version $Id: TActiveButton.php 2541 2008-10-21 15:05:13Z qiang.xue $
 * @package System.Web.UI.ActiveControls
 */

/**
 * Load active control adapter.
 */
Prado::using('System.Web.UI.ActiveControls.TActiveControlAdapter');

/**
 * TActiveButton is the active control counter part to TButton.
 *
 * When a TActiveButton 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.
 *
 * When the {@link TBaseActiveCallbackControl::setEnableUpdate ActiveControl.EnableUpdate}
 * property is true, changing the {@link setText Text} property during callback request
 * will update the button's caption upon callback response completion.
 *
 * @author Wei Zhuo <weizhuo[at]gamil[dot]com>
 * @version $Id: TActiveButton.php 2541 2008-10-21 15:05:13Z qiang.xue $
 * @package System.Web.UI.ActiveControls
 * @since 3.1
 */
class TActiveButton extends TButton implements ICallbackEventHandler, IActiveControl
{
        /**
         * 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 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. If {@link getCausesValidation
         * CausesValidation} is true, it will invoke the page's {@link TPage::
         * validate 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);
        }

        /**
         * 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($value)
        {
                parent::setText($value);
                if($this->getActiveControl()->canUpdateClientSide())
                        $this->getPage()->getCallbackClient()->setAttribute($this, 'value', $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.
         */
        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 TActiveButton.
         */
        protected function getClientClassName()
        {
                return 'Prado.WebUI.TActiveButton';
        }
}