Added wxDragLink

Added SetURL to wxURLDataObject

Fixed the Mozilla problem by reversing the order of the component DOs
in the wxURLDataObject.  By checking the wxTextDataObject first then
it avoids the problem of how Mozilla sends the UniformResourceLocator
data.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@12166 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/dnd.h

@@ -34,12 +34,13 @@ enum wxDragResult
     wxDragNone,     // drag target didn't accept the data
     wxDragCopy,     // the data was successfully copied
     wxDragMove,     // the data was successfully moved (MSW only)
+    wxDragLink,     // operation is a drag-link
     wxDragCancel    // the operation was cancelled by user (not an error)
 };
 
 inline WXDLLEXPORT bool wxIsDragResultOk(wxDragResult res)
 {
-    return res == wxDragCopy || res == wxDragMove;
+    return res == wxDragCopy || res == wxDragMove || res == wxDragLink;
 }
 
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