Fixed missing repaints on S60 3.1.

The bug happened when a paint event came in from Symbian, but the
painted area was bigger than the exposed rect being passed in by
Symbian. In these cases we would lose updates to the area outside.

Fixed by calling Draw() once more if we detect that we painted a
larger area to the backing store.

It is still a mystery why this worked on 5.0 though... :-P

AutoTest: QWidget passed
RevBy:    Jason Barron
Task:     QTBUG-8200

1 files changed, 9 insertions, 1 deletions

diff --git a/src/gui/painting/qwindowsurface_s60.cpp b/src/gui/painting/qwindowsurface_s60.cpp
index 6cbf3d9..028ec48 100644
--- a/src/gui/painting/qwindowsurface_s60.cpp
+++ b/src/gui/painting/qwindowsurface_s60.cpp
@@ -149,11 +149,19 @@ void QS60WindowSurface::flush(QWidget *widget, const QRegion &region, const QPoi
     Q_ASSERT(window);
     QTLWExtra *topExtra = window->d_func()->maybeTopData();
     Q_ASSERT(topExtra);
+    QRect qr = region.boundingRect();
     if (!topExtra->inExpose) {
         topExtra->inExpose = true; // Prevent DrawNow() from calling syncBackingStore() again
-        TRect tr = qt_QRect2TRect(region.boundingRect());
+        TRect tr = qt_QRect2TRect(qr);
         widget->winId()->DrawNow(tr);
         topExtra->inExpose = false;
+    } else {
+        // This handles the case when syncBackingStore updates content outside of the
+        // original drawing rectangle. This might happen if there are pending update()
+        // events at the same time as we get a Draw() from Symbian.
+        QRect drawRect = qt_TRect2QRect(widget->winId()->DrawableWindow()->GetDrawRect());
+        if (!drawRect.contains(qr))
+            widget->winId()->DrawDeferred();
     }
 }