Introduce QEvent::isSinglePointEvent()

This makes high-level event dispatching easier: for example we often
need to cast an event to access getters like button() and buttons().
We can so far assume that any QPointerEvent that is not a QTouchEvent
is a QSinglePointEvent; but more explicit type-checking looks safer.

Implemented in a similar way as c7f727996909338c3689396160f3060480521846.

Change-Id: I980d759e2a7538b6b30fd3bdc3be0c351ec6c246
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/gui/kernel/qevent.h b/src/gui/kernel/qevent.h
index 4bd7a54022..7e35a1b117 100644
--- a/src/gui/kernel/qevent.h
+++ b/src/gui/kernel/qevent.h
@@ -85,7 +85,8 @@ public:
     virtual void setTimestamp(ulong timestamp) { m_timeStamp = timestamp; }
 
 protected:
-    QInputEvent(Type type, PointerEventTag, const QInputDevice *m_dev, Qt::KeyboardModifiers modifiers = Qt::NoModifier);
+    QInputEvent(Type type, PointerEventTag, const QInputDevice *dev, Qt::KeyboardModifiers modifiers = Qt::NoModifier);
+    QInputEvent(Type type, SinglePointEventTag, const QInputDevice *dev, Qt::KeyboardModifiers modifiers = Qt::NoModifier);
 
     const QInputDevice *m_dev = nullptr;
     Qt::KeyboardModifiers m_modState = Qt::NoModifier;
@@ -122,6 +123,8 @@ public:
     bool removePassiveGrabber(const QEventPoint &point, QObject *grabber);
 
 protected:
+    QPointerEvent(Type type, SinglePointEventTag, const QInputDevice *dev, Qt::KeyboardModifiers modifiers = Qt::NoModifier);
+
     QList<QEventPoint> m_points;
 };