From 018f74448da9bfc71063f9255bf8d9f90153a621 Mon Sep 17 00:00:00 2001
From: svan71 <48870638+svan71@users.noreply.github.com>
Date: Sat, 11 Jul 2026 01:53:08 -0400
Subject: [PATCH] fix: compare winId consistently in
 _q_onWindowMotifHintsChanged

The slot receives winId as quint32 (eventFilter and the DWindowManagerHelper
windowMotifWMHintsChanged signal both deliver it truncated to 32 bits), but the
identity guard compared it against the full-width WId from QWindow::winId().
On X11 WId is a 32-bit XID so it worked; on Wayland/Qt6.11 WId is a 64-bit
pointer (>4GiB), so the guard is always true and the slot returns before
fetching Motif functions, leaving motifFunctions at 0 and disabling the
minimize/close buttons on DTK client titlebars (e.g. dde-control-center).
---
 src/dquickwindow.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/dquickwindow.cpp b/src/dquickwindow.cpp
index 64210d35..42966570 100644
--- a/src/dquickwindow.cpp
+++ b/src/dquickwindow.cpp
@@ -214,7 +214,7 @@ void DQuickWindowAttachedPrivate::_q_onWindowMotifHintsChanged(quint32 winId)
 
     if (!q->window())
         return;
-    if (q->window()->winId() != winId)
+    if (static_cast<quint32>(q->window()->winId()) != winId)
         return;
 
     auto functions_hints = DWindowManagerHelper::getMotifFunctions(q->window());