From fd39068f561b2c7ad92e4d14febcfb50ad0569ce Mon Sep 17 00:00:00 2001
From: "Eunki, Hong" <eunkiki.hong@samsung.com>
Date: Mon, 27 Mar 2023 22:25:22 +0900
Subject: [PATCH] [NUI] Add GetOverlayLayer in NUI window.

This PR is FrontPort of #4922

Signed-off-by: Eunki, Hong <eunkiki.hong@samsung.com>
---
 src/Tizen.NUI/src/internal/Interop/Interop.Window.cs |  3 +++
 src/Tizen.NUI/src/public/Window/Window.cs            | 19 +++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/src/Tizen.NUI/src/internal/Interop/Interop.Window.cs b/src/Tizen.NUI/src/internal/Interop/Interop.Window.cs
index 03d756b..32933b3 100755
--- a/src/Tizen.NUI/src/internal/Interop/Interop.Window.cs
+++ b/src/Tizen.NUI/src/internal/Interop/Interop.Window.cs
@@ -209,6 +209,9 @@ namespace Tizen.NUI
             [global::System.Runtime.InteropServices.DllImport(NDalicPINVOKE.Lib, EntryPoint = "CSharp_Dali_Window_GetRootLayer")]
             public static extern global::System.IntPtr GetRootLayer(global::System.Runtime.InteropServices.HandleRef jarg1);
 
+            [global::System.Runtime.InteropServices.DllImport(NDalicPINVOKE.Lib, EntryPoint = "CSharp_Dali_Window_GetOverlayLayer")]
+            public static extern global::System.IntPtr GetOverlayLayer(global::System.Runtime.InteropServices.HandleRef jarg1);
+
             [global::System.Runtime.InteropServices.DllImport(NDalicPINVOKE.Lib, EntryPoint = "CSharp_Dali_Window_KeyEventSignal")]
             public static extern global::System.IntPtr KeyEventSignal(global::System.Runtime.InteropServices.HandleRef jarg1);
 
diff --git a/src/Tizen.NUI/src/public/Window/Window.cs b/src/Tizen.NUI/src/public/Window/Window.cs
index a016d14..0d1fea9 100755
--- a/src/Tizen.NUI/src/public/Window/Window.cs
+++ b/src/Tizen.NUI/src/public/Window/Window.cs
@@ -36,6 +36,7 @@ namespace Tizen.NUI
     {
         private HandleRef stageCPtr;
         private Layer rootLayer;
+        private Layer overlayLayer;
         private Layer borderLayer;
         private string windowTitle;
         private List<Layer> childLayers = new List<Layer>();
@@ -931,6 +932,24 @@ namespace Tizen.NUI
         }
 
         /// <summary>
+        /// Gets the overlay layer.
+        /// </summary>
+        /// <returns>The overlay layer.</returns>
+        [EditorBrowsable(EditorBrowsableState.Never)]
+        public Layer GetOverlayLayer()
+        {
+            // Window.IsInstalled() is actually true only when called from event thread and
+            // Core has been initialized, not when Stage is ready.
+            if (overlayLayer == null && Window.IsInstalled())
+            {
+                overlayLayer = new Layer(Interop.Window.GetOverlayLayer(SwigCPtr), true);
+                if (NDalicPINVOKE.SWIGPendingException.Pending) throw NDalicPINVOKE.SWIGPendingException.Retrieve();
+                overlayLayer.SetWindow(this);
+            }
+            return overlayLayer;
+        }
+
+        /// <summary>
         /// Add a child view to window.
         /// </summary>
         /// <param name="view">the child should be added to the window.</param>
-- 
2.7.4