ALVIN-YANG commented on issue #3564:
URL: https://github.com/apache/echarts/issues/3564#issuecomment-2550481014
测试可行的判断方法：myChart.getZr() 监听鼠标事件，根据 __legendDataIndex 有无值判断 hover的是 饼图还是
legend 组件，hover 到饼图的时候 没有 __legendDataIndex 属性，hover 到 legend 组件的时候有
```
myChart.getZr().on("mouseover", (event) => {
const legendDataIndex = event.topTarget.parent.__legendDataIndex;
if (undefined === legendDataIndex) {
return;
}
console.log("当前hover的legend 的index: ", legendDataIndex);
}
```
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