From 661a182553ecbfcb4aecee2d3510286406b65fb6 Mon Sep 17 00:00:00 2001
From: qinware <qinware@163.com>
Date: Mon, 4 Aug 2025 15:24:22 +0800
Subject: [PATCH] Fix CaptionButtonGroup State bug

---
 src/AtomUI.Controls/Chrome/CaptionButtonGroup.cs | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/AtomUI.Controls/Chrome/CaptionButtonGroup.cs b/src/AtomUI.Controls/Chrome/CaptionButtonGroup.cs
index a4c08ff89..82ff9bea5 100644
--- a/src/AtomUI.Controls/Chrome/CaptionButtonGroup.cs
+++ b/src/AtomUI.Controls/Chrome/CaptionButtonGroup.cs
@@ -176,13 +176,17 @@ internal class CaptionButtonGroup : TemplatedControl, IOperationSystemAware
                       {
                           PseudoClasses.Set(StdPseudoClass.Minimized, x == WindowState.Minimized);
                           PseudoClasses.Set(StdPseudoClass.Normal, x == WindowState.Normal);
-                          PseudoClasses.Set(StdPseudoClass.Maximized, IsWindowMaximized);
+                          PseudoClasses.Set(StdPseudoClass.Maximized, x == WindowState.Maximized);
                           PseudoClasses.Set(StdPseudoClass.Fullscreen, x == WindowState.FullScreen);
+                          IsWindowMaximized  = x == WindowState.Maximized;
+                          IsWindowFullScreen = x == WindowState.FullScreen;
+                      }),
+            HostWindow.GetObservable(Window.TopmostProperty)
+                      .Subscribe(x =>
+                      {
+                          IsWindowPinned     = HostWindow.Topmost;
                       })
         };
-        IsWindowPinned     = HostWindow.Topmost;
-        IsWindowMaximized  = HostWindow.WindowState == WindowState.Maximized;
-        IsWindowFullScreen = HostWindow.WindowState == WindowState.FullScreen;
     }
 
     public virtual void Detach()