44、echarts图形自动轮播tooltip提示，并显示高亮

自动轮播方法

参数myChart代表echarts的实例名称, options指定图表的配置项和数据, num类目数量(原因：循环时达到最大值后，使其从头开始循环), time轮播间隔时长

//自动轮播显示高亮--tooltip提示
export function autoHover(myChart, option, num, time) {
  var defaultData = { //设置默认值
    time: 2000,
    num: 0
  };
  if (!time) {
    time = defaultData.time;
  }
  if (!num) {
    num = defaultData.num;
  }
  var count = 0;
  var timeTicket = null;
  function zdy(){
    timeTicket = setInterval(function () {
      timeTicket && clearInterval(timeTicket);
      myChart.dispatchAction({
        type: "downplay",
        seriesIndex: 0 //serieIndex的索引值   可以触发多个
      });
      myChart.dispatchAction({
        type: "highlight",
        seriesIndex: 0,
        dataIndex: count
      });
      myChart.dispatchAction({
        type: "showTip",
        seriesIndex: 0,
        dataIndex: count
      });
      count++;
      if (count >= num) {
        count = 0
      }
      zdy();
    }, 3000);
  };
  zdy();
  myChart.on("mouseover", function (params) {
    if (params.componentType !== 'geo' ){
      clearInterval(timeTicket);
      myChart.dispatchAction({
        type: "downplay",
        seriesIndex: 0
      });
      myChart.dispatchAction({
        type: "highlight",
        seriesIndex: 0,
        dataIndex: params.dataIndex
      });
      myChart.dispatchAction({
        type: "showTip",
        seriesIndex: 0,
        dataIndex: params.dataIndex
      });
    }

  });
  myChart.on("mouseout", function () {
    timeTicket && clearInterval(timeTicket);
    timeTicket = setInterval(function () {
      myChart.dispatchAction({
        type: "downplay",
        seriesIndex: 0 //serieIndex的索引值   可以触发多个
      });
      myChart.dispatchAction({
        type: "highlight",
        seriesIndex: 0,
        dataIndex: count
      });
      myChart.dispatchAction({
        type: "showTip",
        seriesIndex: 0,
        dataIndex: count
      });
      count++;
      if (count >= num) {
        count = 0
      }
    }, 3000);
  });
}
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使用方式–在需要的界面引入以上方法

import {autoHover} from "../../utils/index";
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