使用echarts在地图中使用dispatchAction

注意事项

1、必须使用goe渲染地图
2、同一个option只能存在一个series参数
3、tooltip提示框默认跟随series参数展示
4、通过地图区域的鼠标悬停事件，用dispatchAction触发城市锚点scatter对应的tooltip
5、dispatchAction的seriesIndex必须加上

代码如下

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script src="../echarts-4.8.0/package/dist/echarts.js"></script>
<script src="./黔西南布依族苗族自治州.js"></script>
</head>
<body>
<div id="map" style="width: 500px;height: 500px;margin: 0 auto"></div>

<script type="text/javascript">
// 城市的坐标
// yoy : year on year 同比
// mom: month on month 环比
const scatterData = [
{
name: '兴义市',
value: [104.897982, 25.088599],
typeList: [{ type: '数据', yoy: '14.8', mom: '-12.8' }],
},
{
name: '安龙县',
value: [105.471498, 25.108959],
typeList: [{ type: '数据', yoy: '14.8', mom: '-12.8' }],
},
{
name: '兴仁市',
value: [105.192778, 25.431378],
typeList: [{ type: '数据', yoy: '14.8', mom: '-12.8' }],
},
{
name: '普安县',
value: [104.955347, 25.786404],
typeList: [{ type: '数据', yoy: '14.8', mom: '-12.8' }],
},
{
name: '晴隆县',
value: [105.218773, 25.832881],
typeList: [{ type: '数据', yoy: '14.8', mom: '-12.8' }],
},
{
name: '贞丰县',
value: [105.650133, 25.385752],
typeList: [{ type: '数据', yoy: '14.8', mom: '-12.8' }],
},
{
name: '望谟县',
value: [106.091563, 25.166667],
typeList: [{ type: '数据', yoy: '14.8', mom: '-12.8' }],
},
{
name: '册亨县',
value: [105.81241, 24.983338],
typeList: [{ type: '数据', yoy: '14.8', mom: '-12.8' }],
},
];

const option = {
title: {
text: '黔西南州',
subtext: '兴义市',
left: 'center',
},
tooltip: {
backgroundColor: '#fff',
trigger: 'item',
alwaysShowContent: true,
triggerOn: 'mousemove' ,
formatter: function(params) {
let htmlStr = '';
params.data.typeList.forEach(item => {
// 判断数值升降
let colorSpan = number => {
let color = number > 0 ? '#00cc99' : '#ff0000';
return `<span style="color: ${color}">${number}%</span>`;
};
htmlStr += `
<div>
${item.type}：同比 ${colorSpan(item.yoy)} 环比 ${colorSpan(item.mom)}
</div>
`;
});

return `<div style="width: 300px; height: 100px; border-radius: 5px; color: #000; font-weight: 600;">
${htmlStr}
</div>`;
},
},
geo: {
map: '黔西南州',
roam: false,
zoom: 1.2,
itemStyle: {
normal: {
borderWidth: 2,
borderColor: '#0090fe', //边框颜色
areaColor: '#003399', //地图区域颜色
},
emphasis: {
show: 'true',
borderWidth: 4,
borderColor: '#b2163c', //边框颜色
areaColor: '#531f67', //鼠标移上去的颜色
},
},
label: {
normal: {
color: '#fff',
fontWeight: 'bold',
show: true,
},
emphasis: {
color: '#fff',
fontWeight: 'bold',
show: true,
},
},
},
series:[
{
type: 'scatter',
coordinateSystem: 'geo',
symbol: 'circle' ,
symbolSize: 10 ,
color: "#00cc99",
data: scatterData
}
]
};

echarts.registerMap("黔西南州", jsonGeo);
let myChart = echarts.init(document.getElementById('map'));
myChart.setOption(option);

myChart.on('mouseover' , (params)=>{
myChart.dispatchAction({
type:'showTip',//默认显示江苏的提示框
seriesIndex: 0,//这行不能省
name: params.name
});
})
</script>
</body>
</html>

原文地址：https://www.cnblogs.com/onesea/p/15392009.html