ModifyImageManipulationPreviewUrlEvent

The PSR-14 event \TYPO3\CMS\Backend\Form\Event\ModifyImageManipulationPreviewUrlEvent can be used to modify the preview URL within the image manipulation element, used for example for the crop field of the sys_file_reference table.

As soon as a preview URL is set, the image manipulation element will display a corresponding button in the footer of the modal window, next to the Cancel and Accept buttons. On click, the preview URL will be opened in a new window.

Example

EXT:my_extension/Classes/Backend/EventListener/MyEventListener.php 
<?php

declare(strict_types=1);

namespace MyVendor\MyExtension\Backend\EventListener;

use TYPO3\CMS\Backend\Form\Event\ModifyImageManipulationPreviewUrlEvent;
use TYPO3\CMS\Core\Attribute\AsEventListener;

#[AsEventListener(
    identifier: 'my-extension/backend/modify-imagemanipulation-previewurl',
)]
final readonly class MyEventListener
{
    public function __invoke(ModifyImageManipulationPreviewUrlEvent $event): void
    {
        $event->setPreviewUrl('https://example.com/some/preview/url');
    }
}
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New in version 13.0

The PHP attribute \TYPO3\CMS\Core\Attribute\AsEventListener has been introduced to tag a PHP class as an event listener. Alternatively, or if you need to be compatible with older TYPO3 versions, you can also register an event listener via the Configuration/Services.yaml file. Switch to an older version of this page for an example or have a look at the section Implementing an event listener in your extension.

API

class ModifyImageManipulationPreviewUrlEvent
Fully qualified name
\TYPO3\CMS\Backend\Form\Event\ModifyImageManipulationPreviewUrlEvent

Listeners to this Event will be able to modify the preview url, used in the ImageManipulation element

getDatabaseRow ( )
Returns
array
getFieldConfiguration ( )
Returns
array
getFile ( )
Returns
\TYPO3\CMS\Core\Resource\File
getPreviewUrl ( )
Returns
string
setPreviewUrl ( string $previewUrl)
param $previewUrl

the previewUrl