DragHandler: don't try to handle native gesture events

No gesture handling has been implemented in DragHandler (although we could).
It just made the target item jump unintentionally.

QQuickMultiPointHandler::wantsPointerEvent() returns true for gestures,
because PinchHandler handles them, and the pattern is that base classes
only rule out some kinds of events but leave the final decision up to
the leaf class.

The autotest has to use a touchpad now, not the primary pointing device,
because QQuickPointerDeviceHandler::wantsPointerEvent() returns false
if pointerType != Finger and acceptedButtons() is not satisfied.

Fixes: QTBUG-92165
Change-Id: I984de750c9ae892f3ee61c7ed5b3ac4a7d187024
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
(cherry picked from commit 73051631545dc59d4419a5ef2202355349aab480)
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

2 files changed, 14 insertions, 0 deletions

diff --git a/src/quick/handlers/qquickdraghandler.cpp b/src/quick/handlers/qquickdraghandler.cpp
index e5e9b03f32..980481303f 100644
--- a/src/quick/handlers/qquickdraghandler.cpp
+++ b/src/quick/handlers/qquickdraghandler.cpp
@@ -179,6 +179,19 @@ void QQuickDragHandler::onActiveChanged()
     }
 }
 
+bool QQuickDragHandler::wantsPointerEvent(QPointerEvent *event)
+{
+    if (!QQuickMultiPointHandler::wantsPointerEvent(event))
+        return false;
+
+#if QT_CONFIG(gestures)
+    if (event->type() == QEvent::NativeGesture)
+       return false;
+#endif
+
+    return true;
+}
+
 void QQuickDragHandler::handlePointerEventImpl(QPointerEvent *event)
 {
     QQuickMultiPointHandler::handlePointerEventImpl(event);
diff --git a/src/quick/handlers/qquickdraghandler_p.h b/src/quick/handlers/qquickdraghandler_p.h
index c1ff108e13..dfd0961b49 100644
--- a/src/quick/handlers/qquickdraghandler_p.h
+++ b/src/quick/handlers/qquickdraghandler_p.h
@@ -94,6 +94,7 @@ Q_SIGNALS:
     Q_REVISION(2, 14) void snapModeChanged();
 
 protected:
+    bool wantsPointerEvent(QPointerEvent *event) override;
     void onActiveChanged() override;
     void onGrabChanged(QQuickPointerHandler *grabber, QPointingDevice::GrabTransition transition, QPointerEvent *event, QEventPoint &point) override;