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封装一个公用的【Echarts图表组件】的3种模板

一、安装echarts

npm install echarts --save

二、在需要的页面引入

import * as echarts from "echarts"

三、创建组件

1、模板1:vue2+javascript

<template>
    <div>
        <div class="echart_size" :id="id"></div>
    </div>
</template>
<script>
import * as echarts from 'echarts'
export default {
    props: {
        // 接收的参数
        id: {
            type: String,
            default: ''
        },
        datas: {
            type: Array,
            default: () => []
        }
    },
    data() {
        return {
            // 变量
        }
    },
    created() {
        this.$nextTick(() => {
            this.barBtn()
        })
    },
    methods: {
        barBtn() {
            // 实例化对象
            let myCharts = echarts.init(document.getElementById(this.id))
            // 指定配置项和数据
            let option = {
                // 某图表
            }
            // 把配置项给实例对象
            myCharts.setOption(option)
            // 让图表跟随屏幕自动的去适应
            window.addEventListener('resize', function () {
                myCharts.resize()
            })
        }
    }
}
</script>
<style lang="scss" scoped>
.echart_size{
    width: 500px;
    height: 500px;
}
</style>

2、模板2:vue3+javascript

vue3中,有的图表调用不到,初始化echarts时使用 shallowRef

const myCharts = shallowRef()
<template>
    <div class="echart_size" :id="props.id"></div>
</template>

<script setup>
import { reactive, ref, nextTick, onMounted } from 'vue'
import * as echarts from 'echarts'
const props = defineProps({
    id: {
        type: String,
        required: true
    },
    datas:{
        type: Array,
        required: true
    }
})

let person=reactive({
    // 初始变量
})

onMounted(()=>{
    GetEchar()
})

const GetEchar = () => {
    const myCharts = ref()
    nextTick(() => {
        myCharts.value = echarts.init(document.getElementById(props.id))
        let option = {
           // 某图表
        };
        myCharts.value.setOption(option)
        // 让图表跟随屏幕自动的去适应
        window.addEventListener('resize', function () {
            myCharts.value.resize()
        })
    })
}

</script>

<style lang="scss" scoped>
.echart_size {
    width: 100%;
    height: 100%;
}
</style>

3、模板3:vue3+typescript

<template>
    <div class="echart_size" :id="props.id"></div>
</template>

<script lang="ts" setup>
import { reactive, ref, nextTick, onMounted } from 'vue'
import * as echarts from 'echarts'
let person: any = reactive({
    // 初始变量
})
type Props = {
    id: string
}
const props = withDefaults(defineProps<Props>(), {})

onMounted(()=>{
    GetEchar()
})
const GetEchar = () => {
    const myChart = ref<HTMLElement>()
    const myCharts = ref<any>()
    nextTick(() => {
        const chartDom = document.getElementById(props.id)!
        myCharts.value = echarts.init(chartDom)
        let option = {
           
        };
        myCharts.value.setOption(option)
        // 让图表跟随屏幕自动的去适应
        window.addEventListener('resize', function () {
            myCharts.value.resize()
        })
    })
}

</script>

<style lang="scss" scoped>
.echart_size {
    width: 500px;
    height: 500px;
}
</style>

四、页面调用

1、vue2

<template>
  <div>
    <EchartModule v-if="data&&data.length>0" :id="'myEchart'" :datas="data" />
  </div>
</template>

<script>
  import EchartModule from '@/components/echartModule'
  export default {
    components: {EchartModule},
    data(){
      return{
        data: [
            { value: 0, label: '测试1' },
            { value: 1, label: '测试2' }
        ]
      }
    }
  }
</script>

2、vue3+js

<template>
   <EchartModule v-if="data&&data.length>0" :id="'myEchart'" :datas="data" />
</template>

<script setup>
import { reactive } from 'vue'
import EchartModule from '@/components/echartModule'
let person=reactive({
  data:[
     { value: 0, label: '测试1' },
     { value: 1, label: '测试2' }
  ]
})
</script>

3、vue3+ts

// vue3+ts
<template>
   <EchartModule v-if="data&&data.length>0" :id="'myEchart'" :datas="data" />
</template>

<script lang="ts" setup>
import { reactive } from 'vue'
import EchartModule from '@/components/echartModule'
let person:any=reactive({
  data:[
     { value: 0, label: '测试1' },
     { value: 1, label: '测试2' }
  ]
})
</script>

五、Echarts 常用的相关事件

1、鼠标单击/左键事件

//vue2
myCharts.on('click', function(e) {})

// vue3
myCharts.value.on('click', function(e) {})

2、鼠标移入/进入事件

//vue2
myCharts.on('mouseover', function(e) {})

// vue3
myCharts.value.on('mouseover', function(e) {})

3、鼠标移出/离开事件

//vue2
myCharts.on('mouseout', function(e) {})

// vue3
myCharts.value.on('mouseout', function(e) {})

4、让图表跟随屏幕去自适应

window.addEventListener('resize', function () {
   // vue2
   myCharts.resize()
   // vue3
   myCharts.value.resize()
})

5、轮播动画效果

需要配置tooltip参数使用,显示tooltip提示框的轮播动画

// vue2
myChart.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: myChart.currentIndex
  });
  myChart.currentIndex = (myChart.currentIndex + 1) % dataLen;
  // 高亮当前图形
  myChart.dispatchAction({
    type: 'highlight',
    seriesIndex: 0,
    dataIndex: myChart.currentIndex
  });
  // 显示 tooltip
  myChart.dispatchAction({
    type: 'showTip',
    seriesIndex: 0,
    dataIndex: myChart.currentIndex
  });
}, 2000);

6、dispatchAction 行为事件

具体用法参考 echarts 下的 action:https://echarts.apache.org/zh/api.html#action

(1)highlight:高亮指定的数据图形

myCharts.currentIndex = -1
myCharts.dispatchAction({
    type: 'highlight',
    seriesIndex: 0,
    dataIndex: myCharts.currentIndex
});

(2)downplay:取消高亮指定的数据图形

(3)select:选中指定的数据

(4)unselect:取消选中指定的数据

(5)toggleSelect:切换选中状态

(6)tooltip - showTip:显示提示框

(7)tooltip - hideTip:隐藏提示框

(8)dataZoom - dataZoom:数据区域缩放

(9)geo - geoSelect:选中指定的地图区域

(10)geo - geoUnSelect:取消选中指定的地图区域

(11)geo - geoToggleSelect:切换指定的地图区域选中状态

六、Echarts 常用的相关配置

1、tooltip 提示框

(1)tooltip的公共属性配置

tooltip: {
  position:'right',
  padding: [5,8],
  textStyle:{
      color: '#eee',
      fontSize: 13
  },
  backgroundColor: "rgba(13,5,30,.5)",
  extraCssText:'z-index:1', // 层级
  axisPointer: {}
}

(2)trigger 类型为 item

tooltip: {
  trigger: 'item',
  formatter: function(param) {
      let resultTooltip =
          "<div style='border:1px solid rgba(255,255,255,.2);padding:5px;border-radius:3px;'>" +
          "<div>" + param.name + "</div>" +
          "<div style='padding-top:5px; font-size:10px;color:#999;'>" +
          "<span style='display: inline-block; width: 10px; height:10px; border-radius: 50%;background-color: " + param.color + ";'></span>" +
          "<span style=''> " + param.seriesName + ":</span>" +
          "<span style='font-size:16px;color:" + param.color + "'>" + param.value + "</span></span>" +
          "</div>";
      return resultTooltip
  }
}

(3)trigger 类型为 axis

tooltip: {
  trigger: 'axis',
  formatter: function(param) {
    let resultTooltip =
        "<div style='border:1px solid rgba(255,255,255,.2);padding:5px;border-radius:3px;'>" +
        "<div>" + param[0].name + "</div>" +
        "<div style='padding-top:5px; font-size:10px;color:#999;'>" +
        "<span style='display: inline-block; width: 10px; height:10px; border-radius: 50%;background: " + param[0].color + ";'></span>" +
        "<span style=''> " + param[0].seriesName + ":</span>" +
        "<span style='font-size:16px;color:" + param[0].color + "'>" + param[0].value + "</span></span>" +
        "</div>";
    return resultTooltip
  }
}

2、axisPointer 坐标指示器

(1)type 类型为 shadow

axisPointer: {
    type: 'shadow',
    label: { show: true, backgroundColor: 'transparent' },
    shadowStyle: {
        color: {
            type: 'linear',
            x: 0,
            y: 0,
            x2: 0,
            y2: 1,
            colorStops: [
                { offset: 0, color: 'rgba(100, 101, 171, 0)' },
                { offset: 0.5, color: 'rgba(100, 101, 171, 0.2)' },
                { offset: 0.999999, color: 'rgba(100, 101, 171, 1)' },
                { offset: 1, color: 'rgba(100, 101, 171, 1)' },
            ],
            global: false
        }
    }
}

(2)type 类型为 line

axisPointer: {
    type: 'line',
    label: { show: true, backgroundColor: 'transparent' },
    lineStyle: {
      color: {
         type: 'linear',
         x: 0,
         y: 0,
         x2: 0,
         y2: 1,
         colorStops: [
            { offset: 0, color: 'rgba(100, 101, 171, 0)' },
            { offset: 0.5, color: 'rgba(100, 101, 171, 0.2)' },
            { offset: 0.999999, color: 'rgba(100, 101, 171, 1)' },
            { offset: 1, color: 'rgba(100, 101, 171, 1)' }
        ],
        global: false
      },
      type: 'solid',
      width: 10
    }
}

3、渐变处理

(1)线性渐变区域 LinearGradient

 // 前四个分参数分别代表右,下,左,上,数值0-1
color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
  {
    offset: 0,
    color: 'blue'
  },
  {
    offset: 1,
    color: 'red'
  }
])

(2)径向渐变区域 RadialGradient

// 前三个分参数分别代表圆心(x,y),半径(数值0-1)
color: new echarts.graphic.RadialGradient(0.5, 0.5, 0.8, [
  {
    offset: 0,
    color: 'blue'
  },
  {
    offset: 1,
    color: 'red'
  }
])

(3)线性渐变区域 colorStops-linear

// x,y,x2,y2数值同LinearGradient前四个参数分别代表右,下,左,上,数值0-1
color: {
  type: 'linear',
  x: 0,
  y: 0,
  x2: 0,
  y2: 1,
  colorStops: [
   {
     offset: 0,
     color: 'blue'
   },
   {
     offset: 1,
     color: 'red'
   }
  ],
  global: false // 缺省为 false
}

(4)径向渐变区域 colorStops-radial

// x 0.5 y 0.5 代表圆心,r 代表半径
color: {
  type: 'radial',
  x: 0.5,
  y: 0.5,
  r: 0.9,
  colorStops: [
    {
      offset: 0,
      color: 'blue'
    },
    {
      offset: 1,
      color: 'red'
    }
  ],
  global: false // 缺省为 false
}

(5)纹理填充 color-image

let url= "../../static/bg_icon.png"
color: {
  image: url, // 支持为 HTMLImageElement, HTMLCanvasElement,不支持路径字符串
  repeat: 'repeat' // 是否平铺,可以是 'repeat-x', 'repeat-y', 'no-repeat'
}
  希望我的愚见能够帮助你哦~,若有不足之处,还望指出,你们有更好的解决方法,欢迎大家在评论区下方留言支持,大家一起相互学习参考呀~

本文转载自: https://blog.csdn.net/weixin_50450473/article/details/121510438
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