From db15cdc590f3c328014a2b84f6230382760be4c5 Mon Sep 17 00:00:00 2001
From: Tom Edwards <109803929+TomEdwardsEnscape@users.noreply.github.com>
Date: Sat, 30 Mar 2024 20:31:34 +0100
Subject: [PATCH] Set WindowImpl._shown in response to window messages (#15177)

---
 src/Windows/Avalonia.Win32/WindowImpl.AppWndProc.cs | 4 ++++
 src/Windows/Avalonia.Win32/WindowImpl.cs            | 3 ---
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/Windows/Avalonia.Win32/WindowImpl.AppWndProc.cs b/src/Windows/Avalonia.Win32/WindowImpl.AppWndProc.cs
index e22e3aa51a..76970dd57b 100644
--- a/src/Windows/Avalonia.Win32/WindowImpl.AppWndProc.cs
+++ b/src/Windows/Avalonia.Win32/WindowImpl.AppWndProc.cs
@@ -609,6 +609,10 @@ namespace Avalonia.Win32
                     _resizeReason = WindowResizeReason.User;
                     break;
 
+                case WindowsMessage.WM_SHOWWINDOW:
+                    _shown = wParam != default;
+                    break;
+
                 case WindowsMessage.WM_SIZE:
                     {
                         var size = (SizeCommand)wParam;
diff --git a/src/Windows/Avalonia.Win32/WindowImpl.cs b/src/Windows/Avalonia.Win32/WindowImpl.cs
index 7a022d1c0d..e34a64a267 100644
--- a/src/Windows/Avalonia.Win32/WindowImpl.cs
+++ b/src/Windows/Avalonia.Win32/WindowImpl.cs
@@ -682,7 +682,6 @@ namespace Avalonia.Win32
         public void Hide()
         {
             UnmanagedMethods.ShowWindow(_hwnd, ShowWindowCommand.Hide);
-            _shown = false;
         }
 
         public virtual void Show(bool activate, bool isDialog)
@@ -1160,8 +1159,6 @@ namespace Avalonia.Win32
 
         private void ShowWindow(WindowState state, bool activate)
         {
-            _shown = true;
-
             if (_isClientAreaExtended)
             {
                 ExtendClientArea();