Refactor pointer event hierarchy

Some goals that have hopefully been achieved are:
- make QPointerEvent and QEventPoint resemble their Qt Quick
  counterparts to such an extent that we can remove those wrappers
  and go back to delivering the original events in Qt Quick
- make QEventPoint much smaller than QTouchEvent::TouchPoint, with no pimpl
- remove most public setters
- reduce the usage of complex constructors that take many arguments
- don't repeat ourselves: move accessors and storage upwards
  rather than having redundant ones in subclasses
- standardize the set of accessors in QPointerEvent
- maintain source compatibility as much as possible: do not require
  modifying event-handling code in any QWidget subclass

To avoid public setters we now introduce a few QMutable* subclasses.
This is a bit like the Builder pattern except that it doesn't involve
constructing a separate disposable object: the main event type can be
cast to the mutable type at any time to enable modifications, iff the
code is linked with gui-private. Therefore event classes can have
less-"complete" constructors, because internal Qt code can use setters
the same way it could use the ones in QTouchEvent before; and the event
classes don't need many friends. Even some read-accessors can be kept
private unless we are sure we want to expose them.

Task-number: QTBUG-46266
Fixes: QTBUG-72173
Change-Id: I740e4e40165b7bc41223d38b200bbc2b403e07b6
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 1 insertions, 11 deletions

diff --git a/src/gui/kernel/qguiapplication_p.h b/src/gui/kernel/qguiapplication_p.h
index c5c4bd09d1..b469c94319 100644
--- a/src/gui/kernel/qguiapplication_p.h
+++ b/src/gui/kernel/qguiapplication_p.h
@@ -293,7 +293,7 @@ public:
     struct ActiveTouchPointsValue {
         QPointer<QWindow> window;
         QPointer<QObject> target;
-        QTouchEvent::TouchPoint touchPoint;
+        QMutableEventPoint touchPoint;
     };
     QHash<ActiveTouchPointsKey, ActiveTouchPointsValue> activeTouchPoints;
     QEvent::Type lastTouchType;
@@ -306,16 +306,6 @@ public:
     };
     QHash<QWindow *, SynthesizedMouseData> synthesizedMousePoints;
 
-    static int mouseEventCaps(QMouseEvent *event);
-    static QVector2D mouseEventVelocity(QMouseEvent *event);
-    static void setMouseEventCapsAndVelocity(QMouseEvent *event, int caps, const QVector2D &velocity);
-
-    static Qt::MouseEventSource mouseEventSource(const QMouseEvent *event);
-    static void setMouseEventSource(QMouseEvent *event, Qt::MouseEventSource source);
-
-    static Qt::MouseEventFlags mouseEventFlags(const QMouseEvent *event);
-    static void setMouseEventFlags(QMouseEvent *event, Qt::MouseEventFlags flags);
-
     static QInputDeviceManager *inputDeviceManager();
 
     const QColorTrcLut *colorProfileForA8Text();