From 24c8af1b626dbc2376cd67006f847b8464ef40b4 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Wed, 11 Aug 2021 21:04:37 +0200
Subject: [PATCH] Manually restore parent windows before showing child.

---
 native/Avalonia.Native/src/OSX/window.mm | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/native/Avalonia.Native/src/OSX/window.mm b/native/Avalonia.Native/src/OSX/window.mm
index 0a78558d27..14fe60ab0b 100644
--- a/native/Avalonia.Native/src/OSX/window.mm
+++ b/native/Avalonia.Native/src/OSX/window.mm
@@ -713,6 +713,12 @@ private:
             if(cparent == nullptr)
                 return E_INVALIDARG;
             
+            // If one tries to show a child window with a minimized parent window, then the parent window will be
+            // restored but MacOS isn't kind enough to *tell* us that, so the window will be left in a non-interactive
+            // state. Detect this and explicitly restore the parent window ourselves to avoid this situation.
+            if (cparent->WindowState() == Minimized)
+                cparent->SetWindowState(Normal);
+            
             [cparent->Window addChildWindow:Window ordered:NSWindowAbove];
             
             UpdateStyle();