ModifyImageManipulationPreviewUrlEvent

New in version 12.0: This event serves as a direct replacement for the now removed $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['Backend/Form/Element/ImageManipulationElement']['previewUrl'] hook.

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.

Note

The element's crop variants will always be appended to the preview URL as JSON-encoded string, using the cropVariants parameter.

Example

Registration of the event listener in the extension's Services.yaml:

EXT:my_extension/Configuration/Services.yaml

services:
  # Place here the default dependency injection configuration

  MyVendor\MyExtension\Backend\EventListener\MyEventListener:
    tags:
      - name: event.listener
        identifier: 'my-extension/backend/modify-imagemanipulation-previewurl'

Read how to configure dependency injection in extensions.

The corresponding event listener class:

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;

final class MyEventListener
{
    public function __invoke(ModifyImageManipulationPreviewUrlEvent $event): void
    {
        $event->setPreviewUrl('https://example.com/some/preview/url');
    }
}

API

class TYPO3\CMS\Backend\Form\Event\ModifyImageManipulationPreviewUrlEvent

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

getDatabaseRow()

Return type

array

getFieldConfiguration()

Return type

array

getFile()

Return type

TYPO3\CMS\Core\Resource\File

getPreviewUrl()

Return type

string

setPreviewUrl(string $previewUrl)

Parameters

• $previewUrl (string) -- the previewUrl