a #GdkDragContext
the new destination window, obtained by gdk_drag_find_window()
the DND protocol in use, obtained by gdk_drag_find_window()
the x position of the pointer in root coordinates
the y position of the pointer in root coordinates
the suggested action
the possible actions
the timestamp for this operation
Updates the drag context when the pointer moves or the set of actions changes.
This function is called by the drag source.
This function does not need to be called in managed drag and drop operations. See gdk_drag_context_manage_dnd() for more information.