【echarts】07、echarts+vue2 - 环形图

前言

基于echarts5.x和vue2实现
记录以便日后查阅
1
2

实现效果

代码实现

<template>
  <div class="chart-wrap">
    <ul class="legend-list">
      <li
        v-for="(item, index) in data"
        :key="index"
        :class="['legend', item.selected ? '': 'un-active']"
        @mouseenter="enterHandler(item)"
        @mouseleave="leaveHandler(item)"
        @click="clickHandler(item)"
      >
        <i class="radius-rect" :style="{ backgroundColor: item.color }" />
        <span>{{ item.name }}span>
      li>
    ul>
    <div id="chart04" class="chart" />
  div>
template>

<script>
export default {
  name: 'Index',
  data () {
    return {
      chart: null,
      data: [
        { name: '公益志愿者活动', value: 55, color: '#013AAA', selected: true },
        { name: '太极拳活动', value: 15, color: '#E92B97', selected: true },
        { name: '暑期出行计划', value: 30, color: '#0593F7', selected: true },
        { name: '其他', value: 30, color: '#F4AD43', selected: true }
      ]
    }
  },
  mounted() {
    this.createChartHandler()
  },
  methods: {
    // 创建图表
    createChartHandler () {
      this.chart = this.$echarts.init(document.getElementById('chart04'))
      this.chart.setOption(this.getChartOption(this.data, this.chart))
      window.addEventListener('resize', () => {
        setTimeout(() => {
          this.chart.resize()
        })
      })
    },
    // 获取图表配置项
    getChartOption (data, chart) {
      return {
        title: {
          text: [
            `{value|${data.reduce((t, s) => { return t + s.value }, 0)}}`,
            '{name|活动总数}'
          ].join('\n'),
          left: 'center',
          top: 'center',
          textStyle: {
            rich: {
              value: {
                fontSize: '20',
                color: '#00D7DA',
                align: 'center',
                lineHeight: 28,
                fontFamily: 'PingFangBold',
                fontWeight: 'bold'
              },
              name: {
                fontSize: '14',
                color: '#fff',
                align: 'center',
                fontFamily: 'PingFangReg',
                fontWeight: '400'
              }
            }
          }
        },
        tooltip: {
          trigger: 'item',
          position: 'right',
          extraCssText:
            'color:#fff;background: rgba(0, 38, 118, 0.5);border:none; box-shadow: 0px 0px 8px 1px rgba(0, 145, 255, 0.5);border-radius: 2px;z-index:99',
          formatter: function (e) {
            return e.name + ':  ' + e.percent + '%'
          }
        },
        legend: {
          show: false,
          data: data.map(i => i.name)
        },
        color: data.map(i => i.color),
        series: [
          {
            name: '',
            type: 'pie',
            radius: ['45%', '60%'],
            center: ['50%', '50%'],
            label: {
              alignTo: 'edge',
              formatter: '{name|{d}%}\n',
              minMargin: 5,
              edgeDistance: 10,
              lineHeight: 30,
              rich: {
                name: {
                  fontSize: 14,
                  color: '#fff',
                  fontFamily: 'PingFangReg',
                  fontWeight: '400'
                }
              }
            },
            labelLine: {
              length: 15,
              length2: 0,
              maxSurfaceAngle: 80
            },
            labelLayout: (params) => {
              const isLeft = params.labelRect.x < chart.getWidth() / 2
              const points = params.labelLinePoints
              points[2][0] = isLeft
                ? params.labelRect.x
                : params.labelRect.x + params.labelRect.width
              return {
                labelLinePoints: points
              }
            },
            data
          }
        ]
      }
    },
    // 鼠标移入图例触发
    enterHandler (item) {
      if (!this.chart) return
      this.chart.dispatchAction({
        type: 'highlight',
        name: item.name
      })
    },
    // 鼠标移出图例触发
    leaveHandler (item) {
      if (!this.chart) return
      this.chart.dispatchAction({
        type: 'downplay',
        name: item.name
      })
    },
    // 选中切换
    clickHandler (item) {
      if (!this.chart) return
      item.selected = !item.selected
      this.chart.dispatchAction({
        type: 'legendToggleSelect',
        name: item.name
      })
    }
  }
}
script>

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