1 files changed, 12 insertions, 3 deletions
diff --git a/src/widgets/kernel/qwidget.cpp b/src/widgets/kernel/qwidget.cpp
index af862e08a2..8f927e8bee 100644
--- a/src/widgets/kernel/qwidget.cpp
+++ b/src/widgets/kernel/qwidget.cpp
@@ -2578,14 +2578,15 @@ void QWidgetPrivate::createWinId()
 /*!
 \internal
 Ensures that the widget is set on the screen point is on. This is handy getting a correct
-size hint before a resize in e.g QMenu and QToolTip
+size hint before a resize in e.g QMenu and QToolTip.
+Returns if the screen was changed.
 */
 
-void QWidgetPrivate::setScreenForPoint(const QPoint &pos)
+bool QWidgetPrivate::setScreenForPoint(const QPoint &pos)
 {
     Q_Q(QWidget);
     if (!q->isWindow())
-        return;
+        return false;
     // Find the screen for pos and make the widget undertand it is on that screen.
     const QScreen *currentScreen = windowHandle() ? windowHandle()->screen() : nullptr;
     QScreen *actualScreen = QGuiApplication::screenAt(pos);
@@ -2594,7 +2595,9 @@ void QWidgetPrivate::setScreenForPoint(const QPoint &pos)
             createWinId();
         if (windowHandle())
             windowHandle()->setScreen(actualScreen);
+        return true;
     }
+    return false;
 }
 
 /*!
@@ -9356,6 +9359,12 @@ bool QWidget::event(QEvent *event)
         d->renderToTextureReallyDirty = 1;
 #endif
         break;
+    case QEvent::PlatformSurface: {
+        auto surfaceEvent = static_cast<QPlatformSurfaceEvent*>(event);
+        if (surfaceEvent->surfaceEventType() == QPlatformSurfaceEvent::SurfaceAboutToBeDestroyed)
+            d->setWinId(0);
+        break;
+    }
 #ifndef QT_NO_PROPERTIES
     case QEvent::DynamicPropertyChange: {
         const QByteArray &propName = static_cast<QDynamicPropertyChangeEvent *>(event)->propertyName();