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+<?php
+/**
+ * TDropContainer class file
+ *
+ * @author Christophe BOULAIN (Christophe.Boulain@gmail.com)
+ * @copyright Copyright &copy; 2008, PradoSoft
+ * @license http://www.pradosoft.com/license
+ * @version $Id$
+ */
+
+/**
+ * Load active control adapter.
+ */
+Prado::using('System.Web.UI.ActiveControls.TActiveControlAdapter');
+/**
+ * Load active panel.
+ */
+Prado::using('System.Web.UI.ActiveControls.TActivePanel');
+
+
+/**
+ * TDropContainer is a panel where TDraggable controls can be dropped.
+ * When a TDraggable component is dropped into a TDropContainer, the {@link OnDrop OnDrop} event is raised.
+ * The {@link TDropContainerEventParameter} param will contain the dropped control.
+ *
+ * Properties :
+ *
+ * <b>{@link setAcceptCssClass AcceptCssClass}</b> : a coma delimited classname of elements that the drop container can accept.
+ * <b>{@link setHoverCssClass HoverCssClass}</b>: CSS classname of the container when a draggable element hovers over the container.
+ *
+ * Events:
+ *
+ * <b>{@link OnDrop OnDrop} : raised when a TDraggable control is dropped. The dropped control is encapsulated in the event parameter
+ *
+ * @author Christophe BOULAIN (Christophe.Boulain@gmail.com)
+ * @copyright Copyright &copy; 2008, PradoSoft
+ * @license http://www.pradosoft.com/license
+ * @version $Id$
+ */
+class TDropContainer extends TPanel implements IActiveControl, ICallbackEventHandler
+{
+ private $_container=null;
+
+ /**
+ * 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 standard active control options.
+ */
+ public function getActiveControl()
+ {
+ return $this->getAdapter()->getBaseActiveControl();
+ }
+
+
+ /**
+ * Gets the Css class name that this container can accept.
+ * @return string
+ */
+ public function getAcceptCssClass()
+ {
+ return $this->getViewState('Accepts', '');
+ }
+
+ /**
+ * Sets the Css class name that this container can accept.
+ * @param string comma delimited css class names.
+ */
+ public function setAcceptCssClass($value)
+ {
+ $this->setViewState('Accepts', TPropertyValue::ensureArray($value), '');
+ }
+
+ /**
+ * Sets the Css class name used when a draggble element is hovering
+ * over this container.
+ * @param string css class name during draggable hover.
+ */
+ public function setHoverCssClass($value)
+ {
+ $this->setViewState('HoverClass', $value, '');
+ }
+
+ /**
+ * Gets the Css class name used when a draggble element is hovering
+ * over this container.
+ * @return string css class name during draggable hover.
+ */
+ public function getHoverCssClass()
+ {
+ return $this->getViewState('HoverClass', '');
+ }
+
+
+ /**
+ * Raises callback event. This method is required bu {@link ICallbackEventHandler}
+ * interface.
+ * It raises the {@link onDrop OnDrop} event, then, the {@link onCallback OnCallback} event
+ * This method is mainly used by framework and control developers.
+ * @param TCallbackEventParameter the parameter associated with the callback event
+ */
+ public function raiseCallbackEvent($param)
+ {
+ $this->onDrop($param->getCallbackParameter());
+ $this->onCallback($param);
+ }
+
+ /**
+ * Raises the onDrop event.
+ * The dropped control is encapsulated into a {@link TDropContainerEventParameter}
+ *
+ * @param string $dropControlId
+ */
+ public function onDrop ($dropControlId)
+ {
+ // Find the control
+ // Warning, this will not work if you have a '_' in your control Id !
+ $control=$this->getPage();
+ $namingContainers=explode(TControl::CLIENT_ID_SEPARATOR, $dropControlId);
+ foreach ($namingContainers as $nc)
+ {
+ $control=$control->findControl($nc);
+ }
+ $this->raiseEvent('OnDrop', $this, new TDropContainerEventParameter ($control));
+
+ }
+
+ /**
+ * 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);
+ }
+
+ /**
+ * Gets the post back options for this textbox.
+ * @return array
+ */
+ protected function getPostBackOptions()
+ {
+ $options['ID'] = $this->getClientID();
+ $options['EventTarget'] = $this->getUniqueID();
+
+ $options['accept'] = TJavascript::encode($this->getAcceptCssClass());
+ $options['hoverclass'] = $this->getHoverCssClass();
+ return $options;
+ }
+
+ /**
+ * Gets the name of the javascript class responsible for performing postback for this control.
+ * This method overrides the parent implementation.
+ * @return string the javascript class name
+ */
+ protected function getClientClassName()
+ {
+ return 'Prado.WebUI.DropContainer';
+ }
+
+
+ /**
+ * Ensure that the ID attribute is rendered and registers the javascript code
+ * for initializing the active control.
+ */
+ protected function addAttributesToRender($writer)
+ {
+ parent::addAttributesToRender($writer);
+ $writer->addAttribute('id',$this->getClientID());
+
+ $this->getPage()->getClientScript()->registerPradoScript('dragdrop');
+
+ $this->getActiveControl()->registerCallbackClientScript(
+ $this->getClientClassName(), $this->getPostBackOptions());
+ }
+
+ /**
+ * Creates child control
+ * Override parent implementation to create a container which will contain all
+ * child controls. This container will be a TActivePanel, in order to allow user
+ * to update its content on callback.
+ */
+ public function createChildControls ()
+ {
+ if ($this->_container===null)
+ {
+ $this->_container=Prado::CreateComponent('System.Web.UI.ActiveControls.TActivePanel');
+ $this->_container->setId($this->getId().'_content');
+ parent::getControls()->add($this->_container);
+ }
+ }
+
+ /**
+ * Override parent implementation to return the container control collection.
+ *
+ * @return TControlCollection
+ */
+ public function getControls()
+ {
+ $this->ensureChildControls();
+ return $this->_container->getControls();
+ }
+
+ /**
+ * Renders and replaces the panel's content on the client-side.
+ * When render() is called before the OnPreRender event, such as when render()
+ * is called during a callback event handler, the rendering
+ * is defered until OnPreRender event is raised.
+ * @param THtmlWriter html writer
+ */
+ public function render ($writer)
+ {
+ if($this->getHasPreRendered())
+ {
+ parent::render($writer);
+ if($this->getActiveControl()->canUpdateClientSide())
+ $this->getPage()->getCallbackClient()->replaceContent($this->_container,$writer);
+ }
+ else
+ {
+ $this->getPage()->getAdapter()->registerControlToRender($this->_container,$writer);
+ }
+ }
+
+}
+
+/**
+ * TDropContainerEventParameter class
+ *
+ * TDropContainerEventParameter encapsulate the parameter
+ * data for <b>OnDrop</b> event of TDropContainer components
+ *
+ * @author Christophe BOULAIN (Christophe.Boulain@ceram.fr)
+ * @copyright Copyright &copy; 2008, PradoSoft
+ * @license http://www.pradosoft.com/license
+ * @version $Id$
+ */
+class TDropContainerEventParameter extends TEventParameter
+{
+ /*
+ * the id of control which has been dropped
+ * @var string
+ */
+ private $_droppedControl;
+
+ /**
+ * constructor
+ *
+ * @param string the id of control which been dropped
+ */
+ public function __construct ($control)
+ {
+ $this->_droppedControl=$control;
+ }
+
+ /**
+ * @return TDraggable
+ */
+ public function getDroppedControl ()
+ {
+ return $this->_droppedControl;
+ }
+}
+?> \ No newline at end of file