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<?php
/**
* TJuiDroppable class file.
*
* @author Fabio Bas <ctrlaltca[at]gmail[dot]com>
* @link https://github.com/pradosoft/prado
* @copyright Copyright © 2013-2015 PradoSoft
* @license https://github.com/pradosoft/prado/blob/master/COPYRIGHT
* @package System.Web.UI.JuiControls
*/
Prado::using('System.Web.UI.JuiControls.TJuiControlAdapter');
Prado::using('System.Web.UI.ActiveControls.TActivePanel');
/**
* TJuiDroppable class.
*
* TJuiDroppable is an extension to {@link TActivePanel} based on jQuery-UI's
* {@link http://jqueryui.com/droppable/ Droppable} interaction.
* When a {@link TJuiDraggable} is dropped over a TJuiDroppable panel, the
* {@link onDrop OnDrop} event will be triggered. The event hanler will receive
* a {@link TJuiEventParameter} object containing a reference to the dropped control
* in the <tt>DraggableControl</tt> property.
*
* <code>
* <com:TJuiDraggable
* ID="drag1"
* Style="border: 1px solid red; width:100px;height:100px;background-color: #fff"
* >
* drag me
* </com:TJuiDraggable>
*
* <com:TJuiDroppable
* ID="drop1"
* Style="border: 1px solid blue; width:600px;height:600px; background-color: lime"
* OnDrop="drop1_ondrop"
* >
* drop it over me
* </com:TJuiDroppable>
* </code>
*
* <code>
* public function drop1_ondrop($sender, $param)
* {
* $draggable=$param->DraggableControl;
* $offset=$param->getCallbackParameter()->offset;
* $target=$param->getCallbackParameter()->target->offset;
* $top=$offset->top - $target->top;
* $left=$offset->left - $target->left;
* $this->label1->Text="Dropped ".$draggable->ID." at: <br/>Top=".$top." Left=".$left;
* }
* </code>
*
* @author Fabio Bas <ctrlaltca[at]gmail[dot]com>
* @package System.Web.UI.JuiControls
* @since 3.3
*/
class TJuiDroppable extends TActivePanel implements IJuiOptions, ICallbackEventHandler
{
protected $_options;
/**
* 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();
$this->setAdapter(new TJuiControlAdapter($this));
}
/**
* @return string the name of the jQueryUI widget method
*/
public function getWidget()
{
return 'droppable';
}
/**
* @return string the clientid of the jQueryUI widget element
*/
public function getWidgetID()
{
return $this->getClientID();
}
/**
* Object containing defined javascript options
* @return TJuiControlOptions
*/
public function getOptions()
{
if (($options=$this->getViewState('JuiOptions'))===null)
{
$options=new TJuiControlOptions($this);
$this->setViewState('JuiOptions', $options);
}
return $options;
}
/**
* Array containing valid javascript options
* @return array()
*/
public function getValidOptions()
{
return array('accept', 'activeClass', 'addClasses', 'disabled', 'greedy', 'hoverClass', 'scope', 'tolerance');
}
/**
* Array containing valid javascript events
* @return array()
*/
public function getValidEvents()
{
return array('activate', 'create', 'deactivate', 'drop', 'out', 'over');
}
/**
* @return array list of callback options.
*/
protected function getPostBackOptions()
{
return $this->getOptions()->toArray();
}
/**
* Ensure that the ID attribute is rendered and registers the javascript code
* for initializing the active control.
*/
protected function addAttributesToRender($writer)
{
parent::addAttributesToRender($writer);
$writer->addAttribute('id',$this->getClientID());
$options=TJavascript::encode($this->getPostBackOptions());
$cs=$this->getPage()->getClientScript();
$code="jQuery('#".$this->getWidgetID()."').".$this->getWidget()."(".$options.");";
$cs->registerEndScript(sprintf('%08X', crc32($code)), $code);
}
/**
* Raises callback event. This method is required by the {@link ICallbackEventHandler}
* interface.
* @param TCallbackEventParameter the parameter associated with the callback event
*/
public function raiseCallbackEvent($param)
{
$this->getOptions()->raiseCallbackEvent($param);
}
/**
* Raises the OnActivate event
* @param object $params event parameters
*/
public function onActivate ($params)
{
$this->raiseEvent('OnActivate', $this, $params);
}
/**
* Raises the OnCreate event
* @param object $params event parameters
*/
public function onCreate ($params)
{
$this->raiseEvent('OnCreate', $this, $params);
}
/**
* Raises the OnDeactivate event
* @param object $params event parameters
*/
public function onDeactivate ($params)
{
$this->raiseEvent('OnDeactivate', $this, $params);
}
/**
* Raises the OnDrop event
* @param object $params event parameters
*/
public function onDrop ($params)
{
$this->raiseEvent('OnDrop', $this, $params);
}
/**
* Raises the OnOut event
* @param object $params event parameters
*/
public function OnOut ($params)
{
$this->raiseEvent('OnOut', $this, $params);
}
/**
* Raises the OnOver event
* @param object $params event parameters
*/
public function OnOver ($params)
{
$this->raiseEvent('OnOver', $this, $params);
}
/**
* This method is invoked when a callback is requested. The method raises
* 'OnCallback' event to fire up the event handlers. If you override this
* method, be sure to call the parent implementation so that the event
* handler can be invoked.
* @param TCallbackEventParameter event parameter to be passed to the event handlers
*/
public function onCallback($param)
{
$this->raiseEvent('OnCallback', $this, $param);
}
}
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