Make it possible to check the accepted state of touch events in tests

QTouchEventSequence simulates a QPA touch event, potentially containing
multiple points. (Despite the name, it only calls qt_handleTouchEvent()
once, so it cannot really send a sequence of events; however, one event
can contain multiple touchpoints.) Delivery is synchronous, and we keep
return values through the QWindowSystemInterface::handleTouchEvent()
template functions; so the remaining step is to return a bool from
qt_handleTouchEvent(), so that we can return a bool from commit().
This allows tests to see the same perspective as a platform plugin can:
check whether the event was accepted or not, after delivery is complete.
Some tests in Qt Quick need to start doing that, to enforce correct
behavior in QQuickDeliveryAgent.

[ChangeLog][QtTestLib] QTouchEventSequence::commit() now returns a bool
so that tests can check whether the event was accepted during delivery.

Pick-to: 6.4
Task-number: QTBUG-104656
Change-Id: I9cf87909a3f847dedbdeca257013e309ac19cf0d
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>

1 files changed, 6 insertions, 4 deletions

diff --git a/src/widgets/kernel/qtestsupport_widgets.cpp b/src/widgets/kernel/qtestsupport_widgets.cpp
index 490a40d431..ea8317db03 100644
--- a/src/widgets/kernel/qtestsupport_widgets.cpp
+++ b/src/widgets/kernel/qtestsupport_widgets.cpp
@@ -115,20 +115,22 @@ QTouchEventWidgetSequence& QTouchEventWidgetSequence::stationary(int touchId)
     return *this;
 }
 
-void QTouchEventWidgetSequence::commit(bool processEvents)
+bool QTouchEventWidgetSequence::commit(bool processEvents)
 {
+    bool ret = false;
     if (points.isEmpty())
-        return;
+        return ret;
     QThread::msleep(1);
     if (targetWindow) {
-        qt_handleTouchEvent(targetWindow, device, points.values());
+        ret = qt_handleTouchEvent(targetWindow, device, points.values());
     } else if (targetWidget) {
-        qt_handleTouchEvent(targetWidget->windowHandle(), device, points.values());
+        ret = qt_handleTouchEvent(targetWidget->windowHandle(), device, points.values());
     }
     if (processEvents)
         QCoreApplication::processEvents();
     previousPoints = points;
     points.clear();
+    return ret;
 }
 
 QTest::QTouchEventWidgetSequence::QTouchEventWidgetSequence(QWidget *widget, QPointingDevice *aDevice, bool autoCommit)