Rename QNativeGestureEvent::deltas() to delta(); clarify docs

In QPanGesture this is called delta().
OTOH we have QWheelEvent::pixelDeltas().
Delta is a vector, and there's only one (with two components).

Native gestures hold incremental values: e.g. the pinch gesture event
provides an incremental amount of either zooming or rotation (so most
events have QNativeGestureEvent::value() very close to 0).
It's the same with the pan gesture's delta().

Add better docs for swipe and pan gestures.

Change-Id: Ia147c7c9a22e084c3700b1620dec46427d792bd1
Reviewed-by: Povilas Kanapickas <povilas@radix.lt>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index e6bc471ec7..f41c37c771 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -2760,7 +2760,7 @@ void QGuiApplicationPrivate::processGestureEvent(QWindowSystemInterfacePrivate::
 
     const QPointingDevice *device = static_cast<const QPointingDevice *>(e->device);
     QNativeGestureEvent ev(e->type, device, e->fingerCount, e->pos, e->pos, e->globalPos, (e->intValue ? e->intValue : e->realValue),
-                           e->deltas, e->sequenceId);
+                           e->delta, e->sequenceId);
     ev.setTimestamp(e->timestamp);
     QGuiApplication::sendSpontaneousEvent(e->window, &ev);
 }