1: <?php
 2: /**
 3:  * PHP version 5
 4:  * @package    generalDriver
 5:  * @author     Christian Schiffler <c.schiffler@cyberspectrum.de>
 6:  * @author     Stefan Heimes <stefan_heimes@hotmail.com>
 7:  * @author     Tristan Lins <tristan.lins@bit3.de>
 8:  * @copyright  The MetaModels team.
 9:  * @license    LGPL.
10:  * @filesource
11:  */
12: 
13: namespace DcGeneral\Contao\Callback;
14: 
15: use DcGeneral\Contao\View\Contao2BackendView\Event\GetParentHeaderEvent;
16: use DcGeneral\DC_General;
17: 
18: /**
19:  * Class ContainerHeaderCallbackListener.
20:  *
21:  * Handler for the header row in parent list mode.
22:  *
23:  * @package DcGeneral\Contao\Callback
24:  */
25: class ContainerHeaderCallbackListener extends AbstractReturningCallbackListener
26: {
27:     /**
28:      * The DC_General instance.
29:      *
30:      * @var \DcGeneral\DC_General
31:      */
32:     protected $dcGeneral;
33: 
34:     /**
35:      * Create a new instance of the listener.
36:      *
37:      * @param array|callable $callback  The callback to call when invoked.
38:      *
39:      * @param DC_General     $dcGeneral The DC_General instance to use in the callback.
40:      */
41:     public function __construct($callback, DC_General $dcGeneral)
42:     {
43:         parent::__construct($callback);
44:         $this->dcGeneral = $dcGeneral;
45:     }
46: 
47:     /**
48:      * Retrieve the arguments for the callback.
49:      *
50:      * @param GetParentHeaderEvent $event The event being emitted.
51:      *
52:      * @return array
53:      */
54:     public function getArgs($event)
55:     {
56:         return array($event->getAdditional(), $this->dcGeneral);
57:     }
58: 
59:     /**
60:      * Update the event with the information returned by the callback.
61:      *
62:      * @param GetParentHeaderEvent $event The event being emitted.
63:      *
64:      * @param array                $value The additional information.
65:      *
66:      * @return void
67:      */
68:     public function update($event, $value)
69:     {
70:         if (is_null($value))
71:         {
72:             return;
73:         }
74: 
75:         $event->setAdditional($value);
76:         $event->stopPropagation();
77:     }
78: }
79: