Remember the fractional part of the scroll position.

1 files changed, 5 insertions, 0 deletions

diff --git a/qscrollareakineticscroller.cpp b/qscrollareakineticscroller.cpp
index 7b28dee..ecef0c6 100644
--- a/qscrollareakineticscroller.cpp
+++ b/qscrollareakineticscroller.cpp
@@ -78,6 +78,7 @@ public:
     bool ignoreEvents;
     QPoint lastOvershoot; // don't change the type to QPointF or we might never shoot completely back.
     QPointer<QWidget> childWidget; // the widget where the mouse was pressed
+    QPointF fractionalPosition;
 
     QElapsedTimer timer;
 
@@ -144,6 +145,7 @@ void QScrollAreaKineticScroller::setWidget(QAbstractScrollArea *widget)
     reset();
     d->area = widget;
     d->lastOvershoot = QPoint();
+    d->fractionalPosition = QPointF();
 
     setParent(d->area);
     if (d->area) {
@@ -327,6 +329,7 @@ QPointF QScrollAreaKineticScroller::contentPosition() const
             p.setX(s->value());
         if (QScrollBar *s = d->area->verticalScrollBar())
             p.setY(s->value());
+        p += d->fractionalPosition;
     }
     return p;
 }
@@ -345,6 +348,8 @@ void QScrollAreaKineticScroller::setContentPosition(const QPointF &p, const QPoi
         if (!delta.isNull())
             d->area->viewport()->move(d->area->viewport()->pos() + delta);
         d->lastOvershoot -= delta;
+
+        d->fractionalPosition = QPointF(p.x() - int(p.x()), p.y() - int(p.y()));
     }
 }