From 4f84db9080d19beca0bcc1206370e822b0aac21e Mon Sep 17 00:00:00 2001
From: Dan Walmsley <dan@walms.co.uk>
Date: Tue, 10 Jul 2018 22:06:50 +0100
Subject: [PATCH] Add fix for monomac borderless windows being

transparent to mouse clicks when they shouldnt be.
---
 src/OSX/Avalonia.MonoMac/WindowImpl.cs | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/src/OSX/Avalonia.MonoMac/WindowImpl.cs b/src/OSX/Avalonia.MonoMac/WindowImpl.cs
index a2f8df6791..3900af8709 100644
--- a/src/OSX/Avalonia.MonoMac/WindowImpl.cs
+++ b/src/OSX/Avalonia.MonoMac/WindowImpl.cs
@@ -3,6 +3,7 @@ using Avalonia.Controls;
 using Avalonia.Platform;
 using MonoMac.AppKit;
 using MonoMac.CoreGraphics;
+using Avalonia.Threading;
 
 namespace Avalonia.MonoMac
 {
@@ -16,7 +17,14 @@ namespace Avalonia.MonoMac
 
         public WindowImpl()
         {
-            UpdateStyle();
+            // Post UpdateStyle to UIThread otherwise for as yet unknown reason.
+            // The window becomes transparent to mouse clicks except a 100x100 square
+            // at the top left. (danwalmsley)
+            Dispatcher.UIThread.Post(() =>
+            {
+                UpdateStyle();
+            });
+
             Window.SetCanBecomeKeyAndMain();
             
             Window.DidResize += delegate