2 files changed, 22 insertions, 0 deletions
diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp
index b056caa..7c41bb9 100644
--- a/src/opengl/qwindowsurface_gl.cpp
+++ b/src/opengl/qwindowsurface_gl.cpp
@@ -604,6 +604,17 @@ void QGLWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint &
     if (!hasPartialUpdateSupport() && !d_ptr->did_paint)
         return;
 
+#ifdef Q_OS_SYMBIAN
+    if (window() != widget) {
+        // For performance reasons we don't support
+        // flushing native child widgets on Symbian.
+        // It breaks overlapping native child widget
+        // rendering in some cases but we prefer performance.
+        return;
+    }
+#endif
+
+
     QWidget *parent = widget->internalWinId() ? widget : widget->nativeParentWidget();
     Q_ASSERT(parent);
 
diff --git a/src/openvg/qwindowsurface_vg.cpp b/src/openvg/qwindowsurface_vg.cpp
index 9ce7f9a..5fb28ac 100644
--- a/src/openvg/qwindowsurface_vg.cpp
+++ b/src/openvg/qwindowsurface_vg.cpp
@@ -79,6 +79,17 @@ QPaintDevice *QVGWindowSurface::paintDevice()
 void QVGWindowSurface::flush(QWidget *widget, const QRegion &region, const QPoint &offset)
 {
     Q_UNUSED(offset);
+
+#ifdef Q_OS_SYMBIAN
+    if (window() != widget) {
+        // For performance reasons we don't support
+        // flushing native child widgets on Symbian.
+        // It breaks overlapping native child widget
+        // rendering in some cases but we prefer performance.
+        return;
+    }
+#endif
+
     QWidget *parent = widget->internalWinId() ? widget : widget->nativeParentWidget();
     d_ptr->endPaint(parent, region);
 }