wheel bug的意思|示意

Unfortunately, there is still a bug in the mouse wheel support capabilities to be used (see Resources for details).

遗憾的是，在要使用的鼠标滚轮支持功能中仍存在错误（有关详细信息请参阅 参考资料）。

Documentation states that mouse wheel events propagate up the container hierarchy, but the bug prevents this from happening so you'll need to attach the listener to the button.

文档声明鼠标滚轮事件向上传递容器层次结构，但错误导致这件事无法发生，所以您需要为按钮增加一个侦听器。

When the mouse wheel listener bug is fixed, you'll be able to remove the use of the button and scroll pane.

修正鼠标滚轮侦听器后，您将可以不用按钮和滚动窗格。