1 files changed, 29 insertions, 5 deletions
diff --git a/src/gui/widgets/qabstractscrollarea.cpp b/src/gui/widgets/qabstractscrollarea.cpp
index 7d81d5a..3cf4e94 100644
--- a/src/gui/widgets/qabstractscrollarea.cpp
+++ b/src/gui/widgets/qabstractscrollarea.cpp
@@ -51,6 +51,7 @@
 #include "qdebug.h"
 #include "qboxlayout.h"
 #include "qpainter.h"
+#include "qmargins.h"
 
 #include "qabstractscrollarea_p.h"
 #include <qwidget.h>
@@ -293,7 +294,9 @@ void QAbstractScrollAreaPrivate::init()
     q->setFrameStyle(QFrame::StyledPanel | QFrame::Sunken);
     q->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
     layoutChildren();
+#ifndef Q_WS_MAC
     viewport->grabGesture(Qt::PanGesture);
+#endif
 }
 
 #ifdef Q_WS_WIN
@@ -542,7 +545,9 @@ void QAbstractScrollArea::setViewport(QWidget *widget)
         d->viewport->setParent(this);
         d->viewport->setFocusProxy(this);
         d->viewport->installEventFilter(d->viewportFilter.data());
+#ifndef Q_WS_MAC
         d->viewport->grabGesture(Qt::PanGesture);
+#endif
         d->layoutChildren();
         if (isVisible())
             d->viewport->show();
@@ -868,6 +873,22 @@ void QAbstractScrollArea::setViewportMargins(int left, int top, int right, int b
 }
 
 /*!
+    \since 4.6
+    Sets \a margins around the scrolling area. This is useful for
+    applications such as spreadsheets with "locked" rows and columns.
+    The marginal space is is left blank; put widgets in the unused
+    area.
+
+    By default all margins are zero.
+
+*/
+void QAbstractScrollArea::setViewportMargins(const QMargins &margins)
+{
+    setViewportMargins(margins.left(), margins.top(),
+                       margins.right(), margins.bottom());
+}
+
+/*!
     \fn bool QAbstractScrollArea::event(QEvent *event)
 
     \reimp
@@ -946,7 +967,7 @@ bool QAbstractScrollArea::event(QEvent *e)
         if (g) {
             QScrollBar *hBar = horizontalScrollBar();
             QScrollBar *vBar = verticalScrollBar();
-            QPointF delta = g->lastOffset();
+            QPointF delta = g->delta();
             if (!delta.isNull()) {
                 if (QApplication::isRightToLeft())
                     delta.rx() *= -1;
@@ -1113,10 +1134,13 @@ void QAbstractScrollArea::mouseMoveEvent(QMouseEvent *e)
 void QAbstractScrollArea::wheelEvent(QWheelEvent *e)
 {
     Q_D(QAbstractScrollArea);
-    if (static_cast<QWheelEvent*>(e)->orientation() == Qt::Horizontal)
-        QApplication::sendEvent(d->hbar, e);
-    else
-        QApplication::sendEvent(d->vbar, e);
+    QScrollBar *const bars[2] = { d->hbar, d->vbar };
+    int idx = (e->orientation() == Qt::Vertical) ? 1 : 0;
+    int other = (idx + 1) % 2;
+    if (!bars[idx]->isVisible() && bars[other]->isVisible())
+        idx = other;   // If the scrollbar of the event orientation is hidden, fallback to the other.
+
+    QApplication::sendEvent(bars[idx], e);
 }
 #endif