Component::createComponent() warns on non-presenter components [Closes nette/forms#147]

Author: dg

src/Application/UI/Component.php

@@ -73,6 +73,17 @@ public function getUniqueId(): string
 	}
 
 
+	protected function createComponent(string $name): ?Nette\ComponentModel\IComponent
+	{
+		$res = parent::createComponent($name);
+		if (!$res instanceof SignalReceiver && !$res instanceof StatePersistent) {
+			$type = get_class($res);
+			trigger_error("It seems that component '$name' of type $type is not intended to for in the Presenter.", E_USER_NOTICE);
+		}
+		return $res;
+	}
+
+
 	protected function validateParent(Nette\ComponentModel\IContainer $parent): void
 	{
 		parent::validateParent($parent);