MDL-85359 core_ltix: make placement configuration form to be dynamic

Author: andrewgos

ltix/classes/form/edit_types.php

@@ -257,6 +257,11 @@ public function definition() {
         // The visibility of these sections should depend on the selection of the "toolplacements" element.
         foreach ($registeredplacementtypes as $key => $value) {
             $this->add_placement_config_elements($mform, $key, $value);
+
+            // Dynamically hide it depending on the toolplacements[] field
+            $unrelatedplacementtypeids = array_values(array_diff(array_keys($registeredplacementtypes), [$key]));
+            $unrelatedplacementtypeids = array_merge($unrelatedplacementtypeids, ['']); // Include blank entry to represent no selection
+            $mform->hideIf("toolplacement_placement_{$key}", 'toolplacements[]', 'in', $unrelatedplacementtypeids);
         }
 
         // Restrict to course categories.