From a6be5564823be40670e0cad8dc758557dbd37549 Mon Sep 17 00:00:00 2001
From: wei <>
Date: Sat, 24 Jun 2006 05:46:22 +0000
Subject: Update active controls.

---
 .../Web/UI/ActiveControls/TActiveDropDownList.php  | 153 +++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 framework/Web/UI/ActiveControls/TActiveDropDownList.php

(limited to 'framework/Web/UI/ActiveControls/TActiveDropDownList.php')

diff --git a/framework/Web/UI/ActiveControls/TActiveDropDownList.php b/framework/Web/UI/ActiveControls/TActiveDropDownList.php
new file mode 100644
index 00000000..679996b5
--- /dev/null
+++ b/framework/Web/UI/ActiveControls/TActiveDropDownList.php
@@ -0,0 +1,153 @@
+<?php
+/**
+ * TActiveDropDownList class file.
+ *
+ * @author Wei Zhuo <weizhuo[at]gamil[dot]com>
+ * @link http://www.pradosoft.com/
+ * @copyright Copyright &copy; 2006 PradoSoft
+ * @license http://www.pradosoft.com/license/
+ * @version $Revision: $  : $
+ * @package System.Web.UI.ActiveControls
+ */
+
+/**
+ * Load active list control adapter
+ */
+Prado::using('System.Web.UI.ActiveControls.TActiveListControlAdapter');
+
+/**
+/**
+ * TActiveDropDownList class.
+ * 
+ * The active control counter part to drop down list control. 
+ * The {@link setAutoPostBack AutoPostBack} property is set to true by default. 
+ * Thus, when the drop down list selection is changed the {@link onCallback OnCallback} event is 
+ * raised after {@link OnSelectedIndexChanged} event. 
+ * 
+ * With {@link TBaseActiveControl::setEnableUpdate() ActiveControl.EnabledUpdate}
+ * set to true (default is true), changes to the selection, <b>after</b> OnLoad event has
+ * been raised, will be updated.
+ * on the client side.
+ *
+ * @author Wei Zhuo <weizhuo[at]gmail[dot]com>
+ * @version : $  Sun Jun 25 19:55:19 EST 2006 $
+ * @package System.Web.UI.ActiveControls
+ * @since 3.0
+ */
+class TActiveDropDownList extends TDropDownList implements ICallbackEventHandler, IActiveControl
+{
+	/**
+	 * Creates a new callback control, sets the adapter to
+	 * TActiveListControlAdapter. If you override this class, be sure to set the
+	 * adapter appropriately by, for example, by calling this constructor.
+	 */
+	public function __construct()
+	{
+		parent::__construct();
+		$this->setAdapter(new TActiveListControlAdapter($this));
+		$this->setAutoPostBack(true);
+	}
+
+	/**
+	 * @return TBaseActiveCallbackControl standard callback control options.
+	 */
+	public function getActiveControl()
+	{
+		return $this->getAdapter()->getBaseActiveControl();
+	}
+
+	/**
+	 * No client class for this control.
+	 * This method overrides the parent implementation.
+	 * @return null no javascript class name.
+	 */
+	protected function getClientClassName()
+	{
+		return 'Prado.WebUI.TActiveDropDownList';
+	}
+	
+	/**
+	 * Loads user input data.
+	 * Disables ActiveControl.EnableUpdate subproperty during loading post data
+	 * to avoid duplicating selection changes.
+	 * @param string the key that can be used to retrieve data from the input data collection
+	 * @param array the input data collection
+	 * @return boolean whether the data of the component has been changed
+	 */
+	public function loadPostData($key,$values)
+	{
+		$enabled = $this->getActiveControl()->getEnableUpdate();
+		$this->getActiveControl()->setEnableUpdate(false);
+		$result = parent::loadPostData($key, $values);
+		$this->getActiveControl()->setEnableUpdate($enabled);
+		return $result;
+	}
+	
+	/**
+	 * Creates a collection object to hold list items. A specialized
+	 * TActiveListItemCollection is created to allow the drop down list options
+	 * to be added.
+	 * This method may be overriden to create a customized collection.
+	 * @return TActiveListItemCollection the collection object
+	 */
+	protected function createListItemCollection()
+	{
+		$collection  = new TActiveListItemCollection;
+		$collection->setControl($this);
+		return $collection;
+	}
+	
+	/**
+	 * Override parent implementation, no javascript is rendered here instead 
+	 * the javascript required for active control is registered in {@link addAttributesToRender}.
+	 */
+	protected function renderClientControlScript($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(), $this->getPostBackOptions());		
+	}		
+	
+	/**
+	 * Raises the callback event. This method is required by {@link
+	 * ICallbackEventHandler} interface. 
+	 * This method is mainly used by framework and control developers.
+	 * @param TCallbackEventParameter the event parameter
+	 */
+ 	public function raiseCallbackEvent($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, $param);
+	}	
+	
+	/**
+	 * Updates the client-side options if the item list has changed after the OnLoad event.
+	 */
+	public function onPreRender($param)
+	{
+		parent::onPreRender($param);
+		$this->getAdapter()->updateListItems();
+	}
+}
+
+?>
\ No newline at end of file
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