Max,
I have a checkboxgroup datum_teiln with options date_1 and date_2. populated by a php80 like:
$options = [
['value' => $this->data("datum_1"), 'text' => $this->data("datum_1")],
['value' => $this->data("datum_2"), 'text' => $this->data("datum_2")]
];
return $options;
this is working OK.
Now i want a second field datum_vorz that shows only whenever the user has selected both checkboxes.
I think this should be possible with an event trigger in the datum_teiln and a listener in the datum_vorz.
Is that a possible way and how to setup the event trigger?