QWidgetWindow: Fix handleExposeEvent()

When the associated widget of QWidgetWindow is visible but its
updates are not enabled, avoid marking the widget dirty.

Task-number: QTBUG-25991
Change-Id: Ibeac4c0dfd3198a5174372331e50628b0d3a480d
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@digia.com>
Reviewed-by: Laszlo Agocs <laszlo.p.agocs@nokia.com>

diff --git a/src/widgets/kernel/qwidgetwindow_qpa.cpp b/src/widgets/kernel/qwidgetwindow_qpa.cpp
index 3b1d69e..21a0ada 100644 (file)
--- a/src/widgets/kernel/qwidgetwindow_qpa.cpp
+++ b/src/widgets/kernel/qwidgetwindow_qpa.cpp
@@ -474,7 +474,7 @@ void QWidgetWindow::handleExposeEvent(QExposeEvent *event)
         m_widget->setAttribute(Qt::WA_Mapped);
         if (!event->region().isNull()) {
             // Exposed native widgets need to be marked dirty to get them repainted correctly.
-            if (m_widget->internalWinId() && !m_widget->isWindow()) {
+            if (m_widget->internalWinId() && !m_widget->isWindow() && m_widget->updatesEnabled()) {
                 if (QWidgetBackingStore *bs = m_widget->d_func()->maybeBackingStore())
                     bs->markDirty(event->region(), m_widget);
             }