g2plot中是否提供监听滚动条滚动的事件

在柱状图中添加滚动，有元素处于选中状态，滚动下去再滚动回来的时候，选中状态会消失，scrollbar组件是否提供滚动事件可以监听呢

Start by reproducing the selected-element loss in a bar chart with scrolling, then inspect the scrollbar component and its available event interface. No file or test is named in the issue; done means determining whether scroll events can be observed and addressing the loss of selection state when scrolling away and back.

Written by the indexing model from the issue text.