Native drag implementation on Mac

Create a native implementation of QCocoaDrag, using the 10.6 (and earlier) Cocoa
dragging API. This matches the implementation in Qt4 closely for the moment.
In the future it may be desirable to create an alternative implementation using
the new (non-blocking) drag API introduced in 10.7, but that will require deeper
changes to the mime-data handling.

This changes makes one more method on QPlatformDrag virtual, since the
Cocoa behaviour diverges from the base version: ::defaultAction is customised.

Change-Id: I1843293a62b2b4973a07b5e75ea3c312dc064018
Reviewed-by: Christoph Schleifenbaum <christoph.schleifenbaum@kdab.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@nokia.com>
Reviewed-by: Morten Johan Sørvig <morten.sorvig@nokia.com>

1 files changed, 20 insertions, 1 deletions

diff --git a/src/plugins/platforms/cocoa/qcocoadrag.h b/src/plugins/platforms/cocoa/qcocoadrag.h
index 5a0a3fa271..cb8a71ed92 100644
--- a/src/plugins/platforms/cocoa/qcocoadrag.h
+++ b/src/plugins/platforms/cocoa/qcocoadrag.h
@@ -51,10 +51,29 @@
 
 QT_BEGIN_NAMESPACE
 
-class QCocoaDrag : public QSimpleDrag
+class QCocoaDrag : public QPlatformDrag
 {
 public:
+    QCocoaDrag();
+
+    virtual QMimeData *platformDropData();
+    virtual Qt::DropAction drag(QDrag *m_drag);
+
+    virtual Qt::DropAction defaultAction(Qt::DropActions possibleActions,
+                                               Qt::KeyboardModifiers modifiers) const;
+
+    /**
+    * to meet NSView dragImage:at guarantees, we need to record the original
+    * event and view when handling an event in QNSView
+    */
+    void setLastMouseEvent(NSEvent *event, NSView *view);
+
+    void setAcceptedAction(Qt::DropAction act);
 private:
+    QDrag *m_drag;
+    NSEvent *m_lastEvent;
+    NSView *m_lastView;
+    Qt::DropAction m_executed_drop_action;
 };
 
 class QCocoaDropData : public QInternalMimeData