Merge remote-tracking branch 'origin/5.4.1' into 5.4

Change-Id: Idadb5639da6e55e7ac8cc30eedf76d147d8d5d23

3 files changed, 16 insertions, 1 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;