Symbian control invokes slots before and after native draw ops

Direct Screen Access (DSA) allows a client to request notification
from the window server when drawing is performed by other threads,
into a specified region of the screen.  This allows DSA rendering
- for example video - to be suspended when notifications are
drawn, preventing the video content from overwriting the
notification.

If the drawing originates from the same thread as that which holds
the DSA session, DSA must be suspended while drawing takes place.
This change allows a widget to request notification when native
drawing is about to be performed by QSymbianControl::Draw.

Task-number: QTBUG-5467
Reviewed-by: Jason Barron

1 files changed, 9 insertions, 0 deletions

diff --git a/src/gui/kernel/qwidget_p.h b/src/gui/kernel/qwidget_p.h
index 025d703..04cf4bb 100644
--- a/src/gui/kernel/qwidget_p.h
+++ b/src/gui/kernel/qwidget_p.h
@@ -257,6 +257,15 @@ struct QWExtra {
 
     NativePaintMode nativePaintMode : 2;
 
+    /**
+     * If this bit is set, each native widget receives the signals from the
+     * Symbian control immediately before and immediately after draw ops are
+     * sent to the window server for this control:
+     *      void beginNativePaintEvent(const QRect &paintRect);
+     *      void endNativePaintEvent(const QRect &paintRect);
+     */
+    uint receiveNativePaintEvents : 1;
+
 #endif
 };