From df43cd75698fa9a2d97b3a0ccac6821c4e0ff78d Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Wed, 20 May 2020 21:30:29 -0300
Subject: [PATCH] fix wpf integration.

---
 src/Windows/Avalonia.Win32.Interop/Wpf/WpfTopLevelImpl.cs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/Windows/Avalonia.Win32.Interop/Wpf/WpfTopLevelImpl.cs b/src/Windows/Avalonia.Win32.Interop/Wpf/WpfTopLevelImpl.cs
index 2887468046..b30831667b 100644
--- a/src/Windows/Avalonia.Win32.Interop/Wpf/WpfTopLevelImpl.cs
+++ b/src/Windows/Avalonia.Win32.Interop/Wpf/WpfTopLevelImpl.cs
@@ -5,6 +5,7 @@ using System.Windows;
 using System.Windows.Input;
 using System.Windows.Interop;
 using System.Windows.Media;
+using Avalonia.Controls;
 using Avalonia.Controls.Embedding;
 using Avalonia.Input;
 using Avalonia.Input.Raw;
@@ -236,6 +237,9 @@ namespace Avalonia.Win32.Interop.Wpf
         Action<Rect> ITopLevelImpl.Paint { get; set; }
         Action<Size> ITopLevelImpl.Resized { get; set; }
         Action<double> ITopLevelImpl.ScalingChanged { get; set; }
+
+        Action<WindowTransparencyLevel> ITopLevelImpl.TransparencyLevelChanged { get; set; }
+
         Action ITopLevelImpl.Closed { get; set; }
         public new event Action LostFocus;
 
@@ -248,5 +252,9 @@ namespace Avalonia.Win32.Interop.Wpf
         }
 
         public IPopupImpl CreatePopup() => null;
+
+        public void SetTransparencyLevelHint(WindowTransparencyLevel transparencyLevel) { }
+
+        public WindowTransparencyLevel TransparencyLevel { get; private set; }
     }
 }