From bc741b867cbff58f59c2698d22a37121ebcc6c50 Mon Sep 17 00:00:00 2001
From: Friedemann Kleint <Friedemann.Kleint@digia.com>
Date: Fri, 1 Mar 2013 13:37:51 +0100
Subject: [PATCH] Windows: Repaint when switching off layered windows by
 opacity.

Task-number: QTBUG-29010

Change-Id: I565a800e5a5b4870bd3ee2e3fb3f55523334425f
Reviewed-by: Andy Shaw <andy.shaw@digia.com>
Reviewed-by: Oliver Wolff <oliver.wolff@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
---
 src/plugins/platforms/windows/qwindowswindow.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/plugins/platforms/windows/qwindowswindow.cpp b/src/plugins/platforms/windows/qwindowswindow.cpp
index 7a68cdeb478..60b455bac9a 100644
--- a/src/plugins/platforms/windows/qwindowswindow.cpp
+++ b/src/plugins/platforms/windows/qwindowswindow.cpp
@@ -257,6 +257,8 @@ static void setWindowOpacity(HWND hwnd, Qt::WindowFlags flags, bool hasAlpha, qr
         } else {
             QWindowsContext::user32dll.setLayeredWindowAttributes(hwnd, 0, (int)(level * 255), LWA_ALPHA);
         }
+    } else if (IsWindowVisible(hwnd)) { // Repaint when switching from layered.
+        InvalidateRect(hwnd, NULL, TRUE);
     }
 #endif // !Q_OS_WINCE
 }