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, 3 deletions

diff --git a/tests/manual/touchGraphicsItem/main.cpp b/tests/manual/touchGraphicsItem/main.cpp
index 2b18634cbd..80265a46f8 100644
--- a/tests/manual/touchGraphicsItem/main.cpp
+++ b/tests/manual/touchGraphicsItem/main.cpp
@@ -68,7 +68,7 @@ protected:
             case QEvent::TouchEnd:
             {
                 QTouchEvent *te = static_cast<QTouchEvent *>(e);
-                for (const QTouchEvent::TouchPoint &tp : te->touchPoints()) {
+                for (const QEventPoint &tp : te->touchPoints()) {
                     QGraphicsEllipseItem *diameterItem = nullptr;
                     QSizeF ellipse = tp.ellipseDiameters();
                     if (ellipse.isNull()) {
@@ -121,8 +121,6 @@ int main(int argc, char **argv)
             str << " Pressure";
         if (capabilities & QPointingDevice::Velocity)
             str << " Velocity";
-        if (capabilities & QPointingDevice::RawPositions)
-            str << " RawPositions";
         if (capabilities & QPointingDevice::Capability::NormalizedPosition)
             str << " NormalizedPosition";
         if (capabilities & QInputDevice::DeviceType::MouseEmulation)