2 files changed, 21 insertions, 5 deletions
diff --git a/src/plugins/platforms/cocoa/qnsview.mm b/src/plugins/platforms/cocoa/qnsview.mm
index 8c0119f68f..cfcbb8053c 100644
--- a/src/plugins/platforms/cocoa/qnsview.mm
+++ b/src/plugins/platforms/cocoa/qnsview.mm
@@ -1124,10 +1124,17 @@ static QTabletEvent::TabletDevice wacomTabletDevice(NSEvent *theEvent)
     }
 }
 
+- (bool) shouldSendSingleTouch
+{
+    // QtWidgets expects single-point touch events, QtDeclarative does not.
+    // Until there is an API we solve this by looking at the window class type.
+    return m_window->inherits("QWidgetWindow");
+}
+
 - (void)touchesBeganWithEvent:(NSEvent *)event
 {
     const NSTimeInterval timestamp = [event timestamp];
-    const QList<QWindowSystemInterface::TouchPoint> points = QCocoaTouch::getCurrentTouchPointList(event, /*acceptSingleTouch= ### true or false?*/false);
+    const QList<QWindowSystemInterface::TouchPoint> points = QCocoaTouch::getCurrentTouchPointList(event, [self shouldSendSingleTouch]);
     qCDebug(lcQpaTouch) << "touchesBeganWithEvent" << points;
     QWindowSystemInterface::handleTouchEvent(m_window, timestamp * 1000, touchDevice, points);
 }
@@ -1135,7 +1142,7 @@ static QTabletEvent::TabletDevice wacomTabletDevice(NSEvent *theEvent)
 - (void)touchesMovedWithEvent:(NSEvent *)event
 {
     const NSTimeInterval timestamp = [event timestamp];
-    const QList<QWindowSystemInterface::TouchPoint> points = QCocoaTouch::getCurrentTouchPointList(event, /*acceptSingleTouch= ### true or false?*/false);
+    const QList<QWindowSystemInterface::TouchPoint> points = QCocoaTouch::getCurrentTouchPointList(event, [self shouldSendSingleTouch]);
     qCDebug(lcQpaTouch) << "touchesMovedWithEvent" << points;
     QWindowSystemInterface::handleTouchEvent(m_window, timestamp * 1000, touchDevice, points);
 }
@@ -1143,7 +1150,7 @@ static QTabletEvent::TabletDevice wacomTabletDevice(NSEvent *theEvent)
 - (void)touchesEndedWithEvent:(NSEvent *)event
 {
     const NSTimeInterval timestamp = [event timestamp];
-    const QList<QWindowSystemInterface::TouchPoint> points = QCocoaTouch::getCurrentTouchPointList(event, /*acceptSingleTouch= ### true or false?*/false);
+    const QList<QWindowSystemInterface::TouchPoint> points = QCocoaTouch::getCurrentTouchPointList(event, [self shouldSendSingleTouch]);
     qCDebug(lcQpaTouch) << "touchesEndedWithEvent" << points;
     QWindowSystemInterface::handleTouchEvent(m_window, timestamp * 1000, touchDevice, points);
 }
@@ -1151,7 +1158,7 @@ static QTabletEvent::TabletDevice wacomTabletDevice(NSEvent *theEvent)
 - (void)touchesCancelledWithEvent:(NSEvent *)event
 {
     const NSTimeInterval timestamp = [event timestamp];
-    const QList<QWindowSystemInterface::TouchPoint> points = QCocoaTouch::getCurrentTouchPointList(event, /*acceptSingleTouch= ### true or false?*/false);
+    const QList<QWindowSystemInterface::TouchPoint> points = QCocoaTouch::getCurrentTouchPointList(event, [self shouldSendSingleTouch]);
     qCDebug(lcQpaTouch) << "touchesCancelledWithEvent" << points;
     QWindowSystemInterface::handleTouchEvent(m_window, timestamp * 1000, touchDevice, points);
 }
diff --git a/src/widgets/kernel/qapplication.cpp b/src/widgets/kernel/qapplication.cpp
index 4818dd7eaa..42a1c0259d 100644
--- a/src/widgets/kernel/qapplication.cpp
+++ b/src/widgets/kernel/qapplication.cpp
@@ -4343,7 +4343,16 @@ bool QApplicationPrivate::translateRawTouchEvent(QWidget *window,
         }
         Q_ASSERT(target.data() != 0);
 
-        StatesAndTouchPoints &maskAndPoints = widgetsNeedingEvents[static_cast<QWidget *>(target.data())];
+        QWidget *targetWidget = static_cast<QWidget *>(target.data());
+
+#ifdef Q_OS_OSX
+        // Single-touch events are normally not sent unless WA_TouchPadAcceptSingleTouchEvents is set.
+        // In Qt 4 this check was in OS X-only coode. That behavior is preserved here by the #ifdef.
+        if (touchPoints.count() == 1 && !targetWidget->testAttribute(Qt::WA_TouchPadAcceptSingleTouchEvents))
+            continue;
+#endif
+
+        StatesAndTouchPoints &maskAndPoints = widgetsNeedingEvents[targetWidget];
         maskAndPoints.first |= touchPoint.state();
         maskAndPoints.second.append(touchPoint);
     }