_bindClickableRail
                                         protected 
                                        
                                        
                                        void
                                            _bindClickableRail
                                           (
                                            )
                                        
                                        
                                        
                                            Attaches DOM event subscribers to support rail interaction.
                                        
                                        _defRailMouseDownFn
                                         protected 
                                        
                                        
                                        void
                                            _defRailMouseDownFn
                                           (
                                                
                                                        
                                                         e
                                                    
                                                
                                            )
                                        
                                        
                                        
                                            Default behavior for the railMouseDown event.  Centers the thumb at
the click location and passes control to the DDM to behave as though
the thumb itself were clicked in preparation for a drag operation.
                                        
                                        - Parameters:
- 
                                                        e <Event>the EventFacade for the railMouseDown custom event
_getThumbDestination
                                         protected 
                                        
                                        
                                        Array
                                            _getThumbDestination
                                           (
                                                
                                                        
                                                         e
                                                    
                                                
                                                        , 
                                                         node
                                                    
                                                
                                            )
                                        
                                        
                                        
                                            Calculates the top left position the thumb should be moved to to
align the click XY with the center of the specified node.
                                        
                                        - Parameters:
- 
                                                        e <DOMEvent>The mousedown event object
- 
                                                        node <Node>The node to position
- Returns:
                                                    Array
- the [top, left] pixel position of the destination
_initClickableRail
                                         protected 
                                        
                                        
                                        void
                                            _initClickableRail
                                           (
                                            )
                                        
                                        
                                        
                                            Initializes the internal state and sets up events.
                                        
                                        _onRailMouseDown
                                         protected 
                                        
                                        
                                        void
                                            _onRailMouseDown
                                           (
                                                
                                                        
                                                         e
                                                    
                                                
                                            )
                                        
                                        
                                        
                                            Dispatches the railMouseDown event.
                                        
                                        - Parameters:
- 
                                                        e <DOMEvent>the mousedown event object
_resolveThumb
                                         protected 
                                        
                                        
                                        Y.DD.Drag
                                            _resolveThumb
                                           (
                                                
                                                        
                                                         e
                                                    
                                                
                                            )
                                        
                                        
                                        
                                            Resolves which thumb to actuate if any.  Override this if you want to
support multiple thumbs.  By default, returns the Drag instance for
the thumb stored by the Slider.
                                        
                                        - Parameters:
- 
                                                        e <DOMEvent>the mousedown event object
- Returns:
                                                    Y.DD.Drag
- the Drag instance that should be moved
_unbindClickableRail
                                         protected 
                                        
                                        
                                        void
                                            _unbindClickableRail
                                           (
                                            )
                                        
                                        
                                        
                                            Detaches DOM event subscribers for cleanup/destruction cycle.