Class enthought.​enable.​wx_backend.​window.​LessSuckyDropTarget

The sole purpose of this class is to override the implementation of OnDragOver() in the parent class to NOT short-circuit return the 'default_drag_result' if the drop_source is None. (The parent class implementation basically means that everything looks like it's OK to drop, and the DnD handler doesn't ever get a chance to intercept or veto.)