1 files changed, 32 insertions, 23 deletions

diff --git a/src/gui/widgets/qabstractscrollarea.cpp b/src/gui/widgets/qabstractscrollarea.cpp
index 08962567d2..7d81d5a4e2 100644
--- a/src/gui/widgets/qabstractscrollarea.cpp
+++ b/src/gui/widgets/qabstractscrollarea.cpp
@@ -293,13 +293,16 @@ void QAbstractScrollAreaPrivate::init()
     q->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
     q->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
     layoutChildren();
+    viewport->grabGesture(Qt::PanGesture);
 }
 
 #ifdef Q_WS_WIN
 void QAbstractScrollAreaPrivate::setSingleFingerPanEnabled(bool on)
 {
     singleFingerPanEnabled = on;
-    winSetupGestures();
+    QWidgetPrivate *dd = static_cast<QWidgetPrivate *>(QObjectPrivate::get(viewport));
+    if (dd)
+        dd->winSetupGestures();
 }
 #endif // Q_WS_WIN
 
@@ -539,6 +542,7 @@ void QAbstractScrollArea::setViewport(QWidget *widget)
         d->viewport->setParent(this);
         d->viewport->setFocusProxy(this);
         d->viewport->installEventFilter(d->viewportFilter.data());
+        d->viewport->grabGesture(Qt::PanGesture);
         d->layoutChildren();
         if (isVisible())
             d->viewport->show();
@@ -935,6 +939,26 @@ bool QAbstractScrollArea::event(QEvent *e)
     case QEvent::TouchUpdate:
     case QEvent::TouchEnd:
         return false;
+    case QEvent::Gesture:
+    {
+        QGestureEvent *ge = static_cast<QGestureEvent *>(e);
+        QPanGesture *g = static_cast<QPanGesture *>(ge->gesture(Qt::PanGesture));
+        if (g) {
+            QScrollBar *hBar = horizontalScrollBar();
+            QScrollBar *vBar = verticalScrollBar();
+            QPointF delta = g->lastOffset();
+            if (!delta.isNull()) {
+                if (QApplication::isRightToLeft())
+                    delta.rx() *= -1;
+                int newX = hBar->value() - delta.x();
+                int newY = vBar->value() - delta.y();
+                hBar->setValue(newX);
+                vBar->setValue(newY);
+            }
+            return true;
+        }
+        return false;
+    }
     case QEvent::StyleChange:
     case QEvent::LayoutDirectionChange:
     case QEvent::ApplicationLayoutDirectionChange:
@@ -990,6 +1014,8 @@ bool QAbstractScrollArea::viewportEvent(QEvent *e)
 #endif
         return QFrame::event(e);
     case QEvent::LayoutRequest:
+    case QEvent::Gesture:
+    case QEvent::GestureOverride:
         return event(e);
     default:
         break;
@@ -1266,11 +1292,13 @@ void QAbstractScrollAreaPrivate::_q_vslide(int y)
 void QAbstractScrollAreaPrivate::_q_showOrHideScrollBars()
 {
     layoutChildren();
-#ifdef Q_OS_WIN
+#ifdef Q_WS_WIN
     // Need to re-subscribe to gestures as the content changes to make sure we
     // enable/disable panning when needed.
-    winSetupGestures();
-#endif // Q_OS_WIN
+    QWidgetPrivate *dd = static_cast<QWidgetPrivate *>(QObjectPrivate::get(viewport));
+    if (dd)
+        dd->winSetupGestures();
+#endif // Q_WS_WIN
 }
 
 QPoint QAbstractScrollAreaPrivate::contentsOffset() const
@@ -1335,25 +1363,6 @@ void QAbstractScrollArea::setupViewport(QWidget *viewport)
     Q_UNUSED(viewport);
 }
 
-//void QAbstractScrollAreaPrivate::_q_gestureTriggered()
-//{
-//    Q_Q(QAbstractScrollArea);
-//    QPanGesture *g = qobject_cast<QPanGesture*>(q->sender());
-//    if (!g)
-//        return;
-//    QScrollBar *hBar = q->horizontalScrollBar();
-//    QScrollBar *vBar = q->verticalScrollBar();
-//    QSizeF delta = g->lastOffset();
-//    if (!delta.isNull()) {
-//        if (QApplication::isRightToLeft())
-//            delta.rwidth() *= -1;
-//        int newX = hBar->value() - delta.width();
-//        int newY = vBar->value() - delta.height();
-//        hbar->setValue(newX);
-//        vbar->setValue(newY);
-//    }
-//}
-
 QT_END_NAMESPACE
 
 #include "moc_qabstractscrollarea.cpp"