--- SelectCheckBoxElement.php	2019-01-29 18:04:04.711144300 +0100
+++ SelectCheckBoxElement_new.php	2019-01-26 11:34:42.140624000 +0100
@@ -79,73 +79,73 @@
         $selItems = $config['items'];
         if (!empty($selItems)) {
             // Get values in an array (and make unique, which is fine because there can be no duplicates anyway):
+            if ( is_string($parameterArray['itemFormElValue']) ) {
+                $parameterArray['itemFormElValue'] = explode(',', $parameterArray['itemFormElValue']);
+            }
             $itemArray = array_flip($parameterArray['itemFormElValue']);
 
             // Traverse the Array of selector box items:
             $groups = [];
             $currentGroup = 0;
             $c = 0;
-            $sOnChange = '';
-            if (!$disabled) {
-                $sOnChange = implode('', $parameterArray['fieldChangeFunc']);
-                // Used to accumulate the JS needed to restore the original selection.
-                foreach ($selItems as $p) {
-                    // Non-selectable element:
-                    if ($p[1] === '--div--') {
-                        $selIcon = '';
-                        if (isset($p[2]) && $p[2] !== 'empty-empty') {
-                            $selIcon = FormEngineUtility::getIconHtml($p[2]);
-                        }
-                        $currentGroup++;
-                        $groups[$currentGroup]['header'] = [
-                            'icon' => $selIcon,
-                            'title' => $p[0]
-                        ];
-                    } else {
-                        // Check if some help text is available
-                        // Help text is expected to be an associative array
-                        // with two key, "title" and "description"
-                        // For the sake of backwards compatibility, we test if the help text
-                        // is a string and use it as a description (this could happen if items
-                        // are modified with an itemProcFunc)
-                        $hasHelp = false;
-                        $help = '';
-                        $helpArray = [];
-                        if (!empty($p[3])) {
-                            $hasHelp = true;
-                            if (is_array($p[3])) {
-                                $helpArray = $p[3];
-                            } else {
-                                $helpArray['description'] = $p[3];
-                            }
-                        }
-                        if ($hasHelp) {
-                            $help = BackendUtility::wrapInHelp('', '', '', $helpArray);
-                        }
-
-                        // Selected or not by default:
-                        $checked = 0;
-                        if (isset($itemArray[$p[1]])) {
-                            $checked = 1;
-                            unset($itemArray[$p[1]]);
-                        }
-
-                        // Build item array
-                        $groups[$currentGroup]['items'][] = [
-                            'id' => StringUtility::getUniqueId('select_checkbox_row_'),
-                            'name' => $parameterArray['itemFormElName'] . '[' . $c . ']',
-                            'value' => $p[1],
-                            'checked' => $checked,
-                            'disabled' => false,
-                            'class' => '',
-                            'icon' => FormEngineUtility::getIconHtml(!empty($p[2]) ? $p[2] : 'empty-empty'),
-                            'title' => $p[0],
-                            'help' => $help
-                        ];
-                        $c++;
-                    }
-                }
-            }
+			$sOnChange = implode('', $parameterArray['fieldChangeFunc']);
+			// Used to accumulate the JS needed to restore the original selection.
+			foreach ($selItems as $p) {
+				// Non-selectable element:
+				if ($p[1] === '--div--') {
+					$selIcon = '';
+					if (isset($p[2]) && $p[2] !== 'empty-empty') {
+						$selIcon = FormEngineUtility::getIconHtml($p[2]);
+					}
+					$currentGroup++;
+					$groups[$currentGroup]['header'] = [
+						'icon' => $selIcon,
+						'title' => $p[0]
+					];
+				} else {
+					// Check if some help text is available
+					// Help text is expected to be an associative array
+					// with two key, "title" and "description"
+					// For the sake of backwards compatibility, we test if the help text
+					// is a string and use it as a description (this could happen if items
+					// are modified with an itemProcFunc)
+					$hasHelp = false;
+					$help = '';
+					$helpArray = [];
+					if (!empty($p[3])) {
+						$hasHelp = true;
+						if (is_array($p[3])) {
+							$helpArray = $p[3];
+						} else {
+							$helpArray['description'] = $p[3];
+						}
+					}
+					if ($hasHelp) {
+						$help = BackendUtility::wrapInHelp('', '', '', $helpArray);
+					}
+
+					// Selected or not by default:
+					$checked = 0;
+					if (isset($itemArray[$p[1]])) {
+						$checked = 1;
+						unset($itemArray[$p[1]]);
+					}
+
+					// Build item array
+					$groups[$currentGroup]['items'][] = [
+						'id' => StringUtility::getUniqueId('select_checkbox_row_'),
+						'name' => $parameterArray['itemFormElName'] . '[' . $c . ']',
+						'value' => $p[1],
+						'checked' => $checked,
+                        'disabled' => $disabled,
+						'class' => '',
+						'icon' => FormEngineUtility::getIconHtml(!empty($p[2]) ? $p[2] : 'empty-empty'),
+						'title' => $p[0],
+						'help' => $help
+					];
+					$c++;
+				}
+			}
 
             $fieldInformationResult = $this->renderFieldInformation();
             $fieldInformationHtml = $fieldInformationResult['html'];
@@ -204,7 +204,7 @@
 
                     // Build reset group button
                     $resetGroupBtn = '';
-                    if (!empty($resetGroup)) {
+                    if (!empty($resetGroup) && !$disabled) {
                         $resetGroup[] = 'TYPO3.FormEngine.updateCheckboxState(this);';
                         $title = htmlspecialchars($this->getLanguageService()->sL('LLL:EXT:core/Resources/Private/Language/locallang_core.xlf:labels.revertSelection'));
                         $resetGroupBtn = '<a href="#" '
@@ -219,15 +219,19 @@
                         $html[] = '<div id="' . $groupId . '" class="panel-collapse collapse" role="tabpanel">';
                     }
                     $checkboxId = uniqid($groupId);
+                    $checkbox = '';
+                    $checkboxLabel = '&nbsp;';
+                    if (!$disabled) {
+                        $checkbox = '<input type="checkbox" id="' . $checkboxId . '" class="t3js-toggle-checkboxes" data-trigger="hover" data-placement="right" data-title="' . $title . '" data-toggle="tooltip" />';
+                        $checkboxLabel = '<label for="' . $checkboxId . '">' . $title . '</label>';
+                    }
                     $title = htmlspecialchars($this->getLanguageService()->sL('LLL:EXT:core/Resources/Private/Language/locallang_core.xlf:labels.toggleall'));
                     $html[] =    '<div class="table-responsive">';
                     $html[] =        '<table class="table table-transparent table-hover">';
                     $html[] =            '<thead>';
                     $html[] =                '<tr>';
-                    $html[] =                    '<th class="col-checkbox">';
-                    $html[] =                       '<input type="checkbox" id="' . $checkboxId . '" class="t3js-toggle-checkboxes" data-trigger="hover" data-placement="right" data-title="' . $title . '" data-toggle="tooltip" />';
-                    $html[] =                    '</th>';
-                    $html[] =                    '<th class="col-title" colspan="2"><label for="' . $checkboxId . '">' . $title . '</label></th>';
+                    $html[] =                    '<th class="col-checkbox">' . $checkbox . '</th>';
+                    $html[] =                    '<th class="col-title" colspan="2">' . $checkboxLabel . '</th>';
                     $html[] =                    '<th class="text-right">' . $resetGroupBtn . '</th>';
                     $html[] =                '</tr>';
                     $html[] =            '</thead>';