ECharts 中的事件和行为-

action中的dispatchAction触发

code：
option = {
title : {
text: '饼图程序调用高亮示例',
x: 'center'
},
tooltip: {
trigger: 'item',
formatter: "{a} 
{b} : {c} ({d}%)"
},
legend: {
orient: 'vertical',
left: 'left',
data: ['直接访问','邮件营销','联盟广告','视频广告','搜索引擎']
},
series : [
{
name: '访问来源',
type: 'pie',
radius : '55%',
center: ['50%', '60%'],
data:[
{value:335, name:'直接访问'},
{value:310, name:'邮件营销'},
{value:234, name:'联盟广告'},
{value:135, name:'视频广告'},
{value:1548, name:'搜索引擎'}
],
itemStyle: {
emphasis: {
shadowBlur: 10,
shadowOffsetX: 0,
shadowColor: 'rgba(0, 0, 0, 0.5)'
}
}
}
]
};

app.currentIndex = -1;

setInterval(function () {
var dataLen = option.series[0].data.length;
// 取消之前高亮的图形
myChart.dispatchAction({
type: 'downplay',
seriesIndex: 0,
dataIndex: app.currentIndex
});
app.currentIndex = (app.currentIndex + 1) % dataLen;
// 高亮当前图形
myChart.dispatchAction({
type: 'highlight',
seriesIndex: 0,
dataIndex: app.currentIndex
});
// 显示 tooltip
myChart.dispatchAction({
type: 'showTip',
seriesIndex: 0,
dataIndex: app.currentIndex
});
}, 1000);

https://www.cnblogs.com/huchong-bk/p/11412577.html