5 files changed, 29 insertions, 7 deletions
diff --git a/src/gui/kernel/qdnd.cpp b/src/gui/kernel/qdnd.cpp
index f515fe18df..2a6cc4fc99 100644
--- a/src/gui/kernel/qdnd.cpp
+++ b/src/gui/kernel/qdnd.cpp
@@ -134,7 +134,8 @@ Qt::DropAction QDragManager::drag(QDrag *o)
     QGuiApplicationPrivate::instance()->notifyDragStarted(o);
     const Qt::DropAction result = m_platformDrag->drag(m_object);
     m_object = 0;
-    o->deleteLater();
+    if (!m_platformDrag->ownsDragObject())
+        o->deleteLater();
     return result;
 }
 
diff --git a/src/gui/kernel/qplatformdrag.cpp b/src/gui/kernel/qplatformdrag.cpp
index 8a5c7264d1..326f092ead 100644
--- a/src/gui/kernel/qplatformdrag.cpp
+++ b/src/gui/kernel/qplatformdrag.cpp
@@ -241,6 +241,18 @@ QPixmap QPlatformDrag::defaultPixmap()
     return *qt_drag_default_pixmap();
 }
 
+/*!
+    \since 5.4
+    \brief Returns bool indicating whether QPlatformDrag takes ownership
+    and therefore responsibility of deleting the QDrag object passed in
+    from QPlatformDrag::drag. This can be useful on platforms where QDrag
+    object has to be kept around.
+ */
+bool QPlatformDrag::ownsDragObject() const
+{
+    return false;
+}
+
 #endif // QT_NO_DRAGANDDROP
 
 QT_END_NAMESPACE
diff --git a/src/gui/kernel/qplatformdrag.h b/src/gui/kernel/qplatformdrag.h
index 34ad11e45f..ce7a9aa1f2 100644
--- a/src/gui/kernel/qplatformdrag.h
+++ b/src/gui/kernel/qplatformdrag.h
@@ -98,6 +98,8 @@ public:
 
     static QPixmap defaultPixmap();
 
+    virtual bool ownsDragObject() const;
+
 private:
     QPlatformDragPrivate *d_ptr;
 
diff --git a/src/plugins/platforms/xcb/qxcbdrag.cpp b/src/plugins/platforms/xcb/qxcbdrag.cpp
index 7037e102e2..ec0399ed5f 100644
--- a/src/plugins/platforms/xcb/qxcbdrag.cpp
+++ b/src/plugins/platforms/xcb/qxcbdrag.cpp
@@ -999,6 +999,8 @@ void QXcbDrag::handleFinished(const xcb_client_message_event_t *event)
         if (at != -1) {
 
             Transaction t = transactions.takeAt(at);
+            if (t.drag)
+                t.drag->deleteLater();
 //            QDragManager *manager = QDragManager::self();
 
 //            Window target = current_target;
@@ -1186,6 +1188,11 @@ bool QXcbDrag::dndEnable(QXcbWindow *w, bool on)
     }
 }
 
+bool QXcbDrag::ownsDragObject() const
+{
+    return true;
+}
+
 QXcbDropData::QXcbDropData(QXcbDrag *d)
     : QXcbMime(),
       drag(d)
diff --git a/src/plugins/platforms/xcb/qxcbdrag.h b/src/plugins/platforms/xcb/qxcbdrag.h
index e273492837..63a344a098 100644
--- a/src/plugins/platforms/xcb/qxcbdrag.h
+++ b/src/plugins/platforms/xcb/qxcbdrag.h
@@ -70,12 +70,11 @@ public:
 
     virtual QMimeData *platformDropData();
 
-
-    void startDrag();
-    void cancel();
-    void move(const QMouseEvent *me);
-    void drop(const QMouseEvent *me);
-    void endDrag();
+    void startDrag() Q_DECL_OVERRIDE;
+    void cancel() Q_DECL_OVERRIDE;
+    void move(const QMouseEvent *me) Q_DECL_OVERRIDE;
+    void drop(const QMouseEvent *me) Q_DECL_OVERRIDE;
+    void endDrag() Q_DECL_OVERRIDE;
 
     void handleEnter(QWindow *window, const xcb_client_message_event_t *event);
     void handlePosition(QWindow *w, const xcb_client_message_event_t *event);
@@ -87,6 +86,7 @@ public:
     void handleFinished(const xcb_client_message_event_t *event);
 
     bool dndEnable(QXcbWindow *win, bool on);
+    bool ownsDragObject() const Q_DECL_OVERRIDE;
 
     void updatePixmap();
     xcb_timestamp_t targetTime() { return target_time; }