Echart中国地图更换背景图的方法示例
时间：2022-12-15 10:31:17 | 栏目：JavaScript代码 | 点击：次
需求
- ui设计稿给了一张下面这张图，背景图用线条画出来的， 心里也是...，没办法也是要实现出来。
解题思路
1.思路一
在canvas外层添加一个div背景图用上面的图片，然后把map地图背景图调成透明，这种方法有很大问题，就是后面怎么做hover显示不同的省份，怎么做缩放呢，难不成还要监听canvas的组件事件来缩放div，所以果断放弃。
2.思路二
仔细观察这张图是不是有规律的，它是一个一个小方格组成的就像贴地板砖一样，那我是不是可以利用地图的纹理来做文章,经过查找Echart api 正好有设置纹理的配置，赞。
解题方法
1.标准动作一
先找ui切个"地板砖"，地板转如下图 (ps:地板砖有点小哈)
2.标准动作二
在代码html里面增加img标签 设置图片为切好的地砖
<div class="graph-chart-wrap">
<div class="graph-chart" ref="graph"></div>
<img ref="image" style="width:10px" v-show="false" src="/assets/image/public/repeat2.png" alt />
</div>
在定义options的上面获取img
const dom = this.$refs["image"];
配置options
geo: {
map: 'china',
show: true,
roam: true,
label: {
normal: {
show: true
},
emphasis: {
show: true
}
},
type: "map",
geoIndex: "1",
zoom: 1.2,
itemStyle: {
normal: {
areaColor: {
image: dom, // 这里是引用上面的img html
repeat: "repeat" // 地板是重复铺贴吗
},
borderColor: "rgba(0,0,0,0.2)"
},
emphasis: {
areaColor:'#69a5ff',
color: "#fff"
},
label: {
show: false
},
shadowColor: 'rgba(0, 0, 0, 1)',
shadowBlur: 100
}
},
全部代码
<template>
<div class="graph-chart-wrap">
<div class="graph-chart" ref="graph"></div>
<img ref="image" style="width:10px" v-show="false" src="../../../../assets/image/public/repeat2.png" alt />
</div>
</template>
<script lang="ts">
import { Component, Vue } from 'vue-property-decorator';
import * as echarts from 'echarts';
import { getTreemap } from '@/api/home';
import { fontSize } from '@/utils/index';
const echartMapJSON = require('@/assets/map/china.json');
@Component({
name: 'graph',
components: {}
})
export default class extends Vue {
private dataList = [];
mounted() {
this.getTreemap();
setInterval(() => {
this.getTreemap();
}, 60000);
this.createChart();
}
private async getTreemap() {
const res = await getTreemap();
if (res && res.data.code === 200) {
this.dataList = res.data.data;
}
}
private createChart() {
const GeoCoordMap: any = {
北京市: [116.4551, 40.2539],
辽宁: [123.1238, 42.1216],
重庆: [108.384366, 30.439702],
浙江: [119.5313, 29.8773],
福建: [119.4543, 25.9222],
广东: [113.12244, 23.009505],
上海: [121.4648, 31.2891]
};
const data = [
{ name: '北京', value: 199 },
{ name: '天津', value: 42 },
{ name: '河北', value: 102 },
{ name: '山西', value: 81 },
{ name: '内蒙古', value: 47 },
{ name: '辽宁', value: 67 },
{ name: '吉林', value: 82 },
{ name: '黑龙江', value: 123 },
{ name: '上海', value: 24 },
{ name: '江苏', value: 92 },
{ name: '浙江', value: 114 },
{ name: '安徽', value: 109 },
{ name: '福建', value: 116 },
{ name: '江西', value: 91 },
{ name: '山东', value: 119 },
{ name: '河南', value: 137 },
{ name: '湖北', value: 116 },
{ name: '湖南', value: 114 },
{ name: '重庆', value: 91 },
{ name: '四川', value: 125 },
{ name: '贵州', value: 62 },
{ name: '云南', value: 83 },
{ name: '西藏', value: 9 },
{ name: '陕西', value: 80 },
{ name: '甘肃', value: 56 },
{ name: '青海', value: 10 },
{ name: '宁夏', value: 18 },
{ name: '新疆', value: 180 },
{ name: '广东', value: 123 },
{ name: '广西', value: 59 },
{ name: '海南', value: 14 }
];
const colorList = [
'#5776DE','#709EED','#6434D5','#E26395','#E8A057','#6434D5'
]
const convertData = (data: any) => {
let res = [];
for (let i = 0; i < data.length; i++) {
const geoCoord = GeoCoordMap[data[i].name];
if (geoCoord) {
res.push({
name: data[i].name,
value: geoCoord.concat(data[i].value)
});
}
}
return res;
};
const dom = this.$refs["image"];
let options: any = {
title: {
top: 20,
// text: '“会员活跃度” - 山东省',
subtext: '',
x: 'center',
textStyle: {
color: '#fff'
}
},
tooltip: {
trigger: 'item',
backgroundColor:'#fff',
className: 'echarts-tooltip echarts-tooltip-dark echarts-tooltip-user',
borderColor:'#e6e6e6',
padding: 4,
triggerOn:'click'
},
geo: {
map: 'china',
show: true,
roam: true,
label: {
normal: {
show: true
},
emphasis: {
show: true
}
},
type: "map",
geoIndex: "1",
zoom: 1.2,
itemStyle: {
normal: {
areaColor: {
image: dom,
repeat: "repeat"
},
borderColor: "rgba(0,0,0,0.2)"
},
emphasis: {
areaColor:'#69a5ff',
color: "#fff"
},
label: {
show: false
},
shadowColor: 'rgba(0, 0, 0, 1)',
shadowBlur: 100
}
},
series: [
{
symbolSize: 5,
label: {
normal: {
formatter: '{b}',
position: 'right',
show: false
},
emphasis: {
show: false
}
},
itemStyle: {
normal: {
color: '#fff'
}
},
name: 'light',
type: 'scatter',
coordinateSystem: 'geo',
data: convertData(data)
},
{
name: 'Top 5',
type: 'effectScatter',
coordinateSystem: 'geo',
symbol: 'circle',
symbolSize: [8, 8],
itemStyle: {
normal: {
color:function(params:{ dataIndex: any }){
return colorList[params.dataIndex]
}
}
},
data: convertData(data),
showEffectOn: 'render',
rippleEffect: {
brushType: 'stroke'
},
hoverAnimation: true,
zlevel: 1,
tooltip: {
formatter: function (params: { value: any[]; name: any; dataIndex: number }) {
return `<div style="width: aoto;text-align:center;line-height:28px; height: auto;color:#fff;font-size: 10px; padding:5px;margin: 0;background:${colorList[params.dataIndex]};border-radius:10px">
<p style="line-height:20px;padding:0;margin:0">${params.name}工厂线</p>
<p style="line-height:20px;padding:0;margin:0">今日实时生产总数</p>
<p style="line-height:20px;padding:0;margin:0">${params.value[2]}</p>
</div>`
},
position:'top',
backgroundColor:'#fff'
}
},
]
};
const graphChart = echarts.init(this.$refs.graph as HTMLCanvasElement);
echarts.registerMap('china', echartMapJSON);
graphChart.setOption(options);
let len = -1;
setInterval(() => {
const dataLen = colorList.length;
len = (len + 1) % dataLen;
graphChart.dispatchAction({
type: 'hideTip'
});
graphChart.dispatchAction({
type: 'showTip',
seriesIndex: 1,
dataIndex: len
});
}, 2000);
}
}
</script>
最终效果
