Refactor the QPA dnd interface.

- Give QPlatformDrag a synchronous drag() function returning
  the Qt::DropAction
- Move the base functionality for asynchronous event handling
  to the platformsupport library as QBasicDrag (extendable base class
  handling drag icon and providing new virtuals)  and QSimpleDrag
  (sample implementation for drag within the Qt application).
- Change the Windows implementation accordingly.
- Change XCB to be based on QBasicDrag.
- Clean up QDragManager.

Change-Id: I654f76f0e55a385ba189bd74f3ceaded6a8fe318
Reviewed-by: Morten Johan Sørvig <morten.sorvig@nokia.com>

1 files changed, 4 insertions, 2 deletions

diff --git a/src/gui/kernel/qguiapplication_p.h b/src/gui/kernel/qguiapplication_p.h
index 68546ce0cf..d9477a3e9e 100644
--- a/src/gui/kernel/qguiapplication_p.h
+++ b/src/gui/kernel/qguiapplication_p.h
@@ -53,6 +53,8 @@
 #include "private/qwindowsysteminterface_qpa_p.h"
 #include "private/qshortcutmap_p.h"
 
+#include "qplatformdrag_qpa.h"
+
 QT_BEGIN_HEADER
 
 QT_BEGIN_NAMESPACE
@@ -121,8 +123,8 @@ public:
 
     static void processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent *e);
 
-    static Qt::DropAction processDrag(QWindow *w, QMimeData *dropData, const QPoint &p);
-    static Qt::DropAction processDrop(QWindow *w, QMimeData *dropData, const QPoint &p);
+    static QPlatformDragQtResponse processDrag(QWindow *w, const QMimeData *dropData, const QPoint &p, Qt::DropActions supportedActions);
+    static QPlatformDropQtResponse processDrop(QWindow *w, const QMimeData *dropData, const QPoint &p, Qt::DropActions supportedActions);
 
     static bool processNativeEvent(QWindow *window, const QByteArray &eventType, void *message, long *result);