From 73d05a5ec49cb42082f9e265d25fb0c8ce787939 Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Thu, 10 Mar 2022 12:19:26 +0300
Subject: [PATCH] Add ui helpers for finding a specific element type in element
 tree

---
 libs/ui/include/psemek/ui/element.hpp | 31 +++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/libs/ui/include/psemek/ui/element.hpp b/libs/ui/include/psemek/ui/element.hpp
index f5ea9058..177d4d2a 100644
--- a/libs/ui/include/psemek/ui/element.hpp
+++ b/libs/ui/include/psemek/ui/element.hpp
@@ -88,4 +88,35 @@ namespace psemek::ui
 		void post_delayed_callbacks() const;
 	};
 
+	template <typename Type>
+	Type * find_first_parent_of_type(element * e)
+	{
+		while (true)
+		{
+			if (!e)
+				return nullptr;
+
+			if (auto p = dynamic_cast<Type *>(e))
+				return p;
+
+			e = e->parent();
+		}
+	}
+
+	template <typename Type>
+	Type * find_last_parent_of_type(element * e)
+	{
+		Type * r = nullptr;
+		while (true)
+		{
+			if (auto p = find_first_parent_of_type<Type>(e))
+			{
+				r = p;
+				e = p->parent();
+			}
+			else
+				return r;
+		}
+	}
+
 }