Begin handling the QEvent refactoring

This is an intermediate step to get Qt Quick working again after
qtbase 4e400369c08db251cd489fec1229398c224d02b4.

- QQuickEventPoint::id() is no longer unique across devices, because now
  eventPoint.event.device tells which specific device the event comes from.
  (In Qt 5, we could not yet add the device pointer to QInputEvent.)
- However, MultiPointTouchArea's docs say that each pointId is unique,
  and so do the HandlerPoint docs (for similar use cases with PointHandler).
  So we still need the same hack using a Qt-specific short device ID
  to unique-ify the QEventPoint::id(). Now we use the device index
  in QInputDevice::devices() as the short ID.
- Otherwise, we trust QInputDevice::systemId() and QEventPoint::id()
  more than before.
- Use QMutable* classes from qevent_p.h to continue using setters
  that were in QTouchEvent before, etc.  But setTouchPoints() is
  not there, so we have to make new event instances in a couple of cases.
- QGuiApplicationPrivate::setMouseEventCapsAndVelocity() and
  setMouseEventSource() are gone.
- Use (compiler-written) event copy constructors when possible.

Task-number: QTBUG-72173
Change-Id: I3915dc535ae4c5a81cbf333aba9355f01c420c15
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/quick/items/qquickwindow_p.h b/src/quick/items/qquickwindow_p.h
index e79f2634e1..09851c5fa5 100644
--- a/src/quick/items/qquickwindow_p.h
+++ b/src/quick/items/qquickwindow_p.h
@@ -1,6 +1,6 @@
 /****************************************************************************
 **
-** Copyright (C) 2016 The Qt Company Ltd.
+** Copyright (C) 2020 The Qt Company Ltd.
 ** Contact: https://www.qt.io/licensing/
 **
 ** This file is part of the QtQuick module of the Qt Toolkit.
@@ -65,6 +65,7 @@
 #include <QtCore/qwaitcondition.h>
 #include <QtCore/qrunnable.h>
 
+#include <QtGui/private/qevent_p.h>
 #include <QtGui/private/qwindow_p.h>
 #include <QtGui/qevent.h>
 #include <QtGui/qstylehints.h>
@@ -185,6 +186,7 @@ public:
     QQuickPointerEvent *pointerEventInstance(const QPointingDevice *device, QEvent::Type eventType = QEvent::None) const;
 
     // delivery of pointer events:
+    QMouseEvent *touchToMouseEvent(QEvent::Type type, const QEventPoint &p, QTouchEvent *event, QQuickItem *item, bool transformNeeded = true);
     QQuickPointerEvent *pointerEventInstance(QEvent *ev) const;
     void deliverPointerEvent(QQuickPointerEvent *);
     void deliverTouchEvent(QQuickPointerTouchEvent *);
@@ -269,7 +271,7 @@ public:
     QSGRenderLoop *windowManager;
     QQuickRenderControl *renderControl;
     QScopedPointer<QQuickAnimatorController> animationController;
-    QScopedPointer<QTouchEvent> delayedTouch;
+    QScopedPointer<QMutableTouchEvent> delayedTouch;
 
     int pointerEventRecursionGuard;