Index: branches/5.1.x/core/units/email_events/email_event_tp.php
===================================================================
diff -u -N -r13140 -r13635
--- branches/5.1.x/core/units/email_events/email_event_tp.php	(.../email_event_tp.php)	(revision 13140)
+++ branches/5.1.x/core/units/email_events/email_event_tp.php	(.../email_event_tp.php)	(revision 13635)
@@ -21,4 +21,54 @@
 				$this->Application->setUnitOption($this->Prefix, 'Grids', $grids);
 			}
 		}
+
+		/**
+		 * Checks, that field can be edited
+		 *
+		 * @param Array $params
+		 * @return string
+		 */
+		function IsEditable($params)
+		{
+			if ($this->Application->isDebugMode()) {
+				return true;
+			}
+
+			$object =& $this->getObject($params);
+			/* @var $object kDBItem */
+
+			return $object->GetDBField($params['check_field']);
+		}
+
+		/**
+		 * Removes "To" options from possible options in "RecipientType" field
+		 *
+		 * @param Array $params
+		 */
+		function RemoveToRecipientType($params)
+		{
+			$object =& $this->getObject($params);
+			/* @var $object kDBItem */
+
+			$field_options = $object->GetFieldOptions('RecipientType');
+			unset($field_options['options'][RECIPIENT_TYPE_TO]);
+			$object->SetFieldOptions('RecipientType', $field_options);
+		}
+
+		/**
+		 * Restores "To" option in possible option list in "RecipientType" field
+		 *
+		 * @param Array $params
+		 */
+		function RestoreRecipientType($params)
+		{
+			$object =& $this->getObject($params);
+			/* @var $object kDBItem */
+
+			$field_options = $object->GetFieldOptions('RecipientType');
+			$virtual_fields = $this->Application->getUnitOption($this->Prefix, 'VirtualFields');
+			$field_options['options'] = $virtual_fields['RecipientType']['options'];
+			$object->SetFieldOptions('RecipientType', $field_options);
+		}
+
 	}
\ No newline at end of file