Forward touchEvents to children inside QGraphicsProxyWidget

Just sending the event to the embedded widget is not enough, we
have to perform hit-testing for the different touch points, and
send the event to the child widget under the point. Fortunately,
QApplicationPrivate::translateRawTouchEvent provides the logic
that generates multiple events for groups of touch points.

Since that helper always sent events spontaneously, add an
optional parameter to allow sending of non-spontaneous events.

Add a test case that simulates touch events to different widget
configurations inside a QGraphicsProxyWidget.

Fixes: QTBUG-67819
Task-number: QTBUG-45737
Pick-to: 6.2 6.1 5.15
Change-Id: Iffd5c84c64ee2ceadc7e31863675fdf227582c81
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

1 files changed, 2 insertions, 1 deletions

diff --git a/src/widgets/kernel/qapplication_p.h b/src/widgets/kernel/qapplication_p.h
index f690b07924..31dde00dd9 100644
--- a/src/widgets/kernel/qapplication_p.h
+++ b/src/widgets/kernel/qapplication_p.h
@@ -253,7 +253,8 @@ public:
     static bool translateRawTouchEvent(QWidget *widget,
                                        const QPointingDevice *device,
                                        QList<QEventPoint> &touchPoints,
-                                       ulong timestamp);
+                                       ulong timestamp,
+                                       bool spontaneous = true);
     static void translateTouchCancel(const QPointingDevice *device, ulong timestamp);
 
     QPixmap applyQIconStyleHelper(QIcon::Mode mode, const QPixmap& base) const override;