Remove QQuickPointerEvent etc.; deliver QPointerEvents directly

QEventPoint does not have an accessor to get the QPointerEvent that it
came from, because that's inconsistent with the idea that QPointerEvent
instances are temporary, stack-allocated and movable (the pointer would
often be wrong or null, therefore could not be relied upon).
So most functions that worked directly with QQuickEventPoint before
(which fortunately are still private API) now need to receive the
QPointerEvent too, which we choose to pass by pointer. QEventPoint is
always passed by reference (const where possible) to be consistent with
functions in QPointerEvent that take QEventPoint by reference.

QEventPoint::velocity() should be always in scene coordinates now, which
saves us the trouble of transforming it to each item's coordinate system
during delivery, but means that it will need to be done in handlers or
applications sometimes.  If we were going to transform it, it would be
important to also store the sceneVelocity separately in QEventPoint
so that the transformation could be done repeatedly for different items.

Task-number: QTBUG-72173
Change-Id: I7ee164d2e6893c4e407fb7d579c75aa32843933a
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 8 insertions, 7 deletions

diff --git a/src/quick/handlers/qquicktaphandler_p.h b/src/quick/handlers/qquicktaphandler_p.h
index d5c16b071f..d75547eee2 100644
--- a/src/quick/handlers/qquicktaphandler_p.h
+++ b/src/quick/handlers/qquicktaphandler_p.h
@@ -97,19 +97,20 @@ Q_SIGNALS:
     void timeHeldChanged();
     void longPressThresholdChanged();
     void gesturePolicyChanged();
-    void tapped(QQuickEventPoint *eventPoint);
-    void singleTapped(QQuickEventPoint *eventPoint);
-    void doubleTapped(QQuickEventPoint *eventPoint);
+    void tapped(QEventPoint eventPoint);
+    void singleTapped(QEventPoint eventPoint);
+    void doubleTapped(QEventPoint eventPoint);
     void longPressed();
 
 protected:
-    void onGrabChanged(QQuickPointerHandler *grabber, QQuickEventPoint::GrabTransition transition, QQuickEventPoint *point) override;
+    void onGrabChanged(QQuickPointerHandler *grabber, QPointingDevice::GrabTransition transition,
+                       QPointerEvent *ev, QEventPoint &point) override;
     void timerEvent(QTimerEvent *event) override;
-    bool wantsEventPoint(QQuickEventPoint *point) override;
-    void handleEventPoint(QQuickEventPoint *point) override;
+    bool wantsEventPoint(const QPointerEvent *event, const QEventPoint &point) override;
+    void handleEventPoint(QPointerEvent *event, QEventPoint &point) override;
 
 private:
-    void setPressed(bool press, bool cancel, QQuickEventPoint *point);
+    void setPressed(bool press, bool cancel, QPointerEvent *event, QEventPoint &point);
     int longPressThresholdMilliseconds() const;
     void connectPreRenderSignal(bool conn = true);
     void updateTimeHeld();