当人力车图数据发生变化时，滑块预览不会更改/更新。我无法使用滑块预览。
获得以下异常
Rickshaw.Graph.HoverDetail.Rickshaw.Class.create._calcLayoutError rickshaw.js:2282
Rickshaw.Graph.HoverDetail.Rickshaw.Class.create.render rickshaw.js:2257
Rickshaw.Graph.HoverDetail.Rickshaw.Class.create.update rickshaw.js:2173
(anonymous function) rickshaw.js:2308