【echarts】04、echarts+vue2 - 折线图

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 legend"
        :key="index"
        :class="['legend', item.selected ? '': 'un-active']"
        @mouseenter="enterHandler(item)"
        @mouseleave="leaveHandler(item)"
        @click="clickHandler(item)"
      >
        <img :src="item.url" :alt="item.title">
        <span>{{ item.title }}span>
      li>
    ul>
    <div id="chart01" class="chart" />
  div>
template>

<script>
export default {
  name: 'Index',
  data () {
    return {
      chart: null,
      data: {
        dates: ['2017', '2018', '2019', '2020', '2021'],
        values: [
          [100, 75, 125, 37, 10],
          [40, 15, 20, 30, 11],
          [40, 55, 23, 30, 12],
          [0, 24, 20, 19, 12]
        ]
      },
      legend: [
        { url: require('../../../assets/img/01/czrk.png'), title: '常驻人口', selected: true },
        { url: require('../../../assets/img/01/wlrk.png'), title: '外来人口', selected: true },
        { url: require('../../../assets/img/01/70ys.png'), title: '70岁以上', selected: true },
        { url: require('../../../assets/img/01/14yx.png'), title: '14岁以下', selected: true }
      ]
    }
  },
  mounted() {
    this.createChartHandler()
  },
  methods: {
    // 创建图表
    createChartHandler () {
      this.chart = this.$echarts.init(document.getElementById('chart01'))
      this.chart.setOption(this.getChartOption(this.data, this.legend))
      window.addEventListener('resize', () => {
        setTimeout(() => {
          this.chart.resize()
        })
      })
    },
    // 获取图表配置项
    getChartOption (data, legend) {
      return {
        legend: {
          show: false,
          data: legend.map(i => i.title)
        },
        tooltip: {
          trigger: 'axis',
          // position: [10, 10],
          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) {
            let str = `
${e[0].name}
`
            e.forEach(it => {
              str += `
${it.marker} ${it.seriesName} ${it.value}人`
            })
            str += '
'
            return str
          }
        },
        textStyle: {
          color: '#fff'
        },
        yAxis: {
          type: 'value',
          splitLine: {
            show: true,
            lineStyle: {
              color: 'rgba(0,219,255,0.4000)',
              type: 'dashed'
            }
          }
        },
        xAxis: {
          type: 'category',
          data: data.dates,
          boundaryGap: false,
          axisTick: {
            show: false
          },
          axisLine: {
            lineStyle: {
              type: 'dashed',
              color: 'rgba(0,219,255,0.2000)'
            }
          }
        },
        grid: {
          top: '5%',
          left: '5%',
          right: '5%',
          bottom: '5%',
          containLabel: true
        },
        series: [
          {
            name: '常驻人口',
            data: data.values[0],
            type: 'line',
            smooth: true,
            color: '#3C7CFF'
          }, {
            name: '外来人口',
            data: data.values[1],
            type: 'line',
            smooth: true,
            color: '#42E0FC'
          }, {
            name: '70岁以上',
            data: data.values[2],
            type: 'line',
            smooth: true,
            color: '#3AE4A2'
          }, {
            name: '14岁以下',
            data: data.values[3],
            type: 'line',
            smooth: true,
            color: '#359983'
          }
        ]
      }
    },
    // 鼠标移入图例触发
    enterHandler (item) {
      if (!this.chart) return
      this.chart.dispatchAction({
        type: 'highlight',
        seriesName: item.title
      })
    },
    // 鼠标移出图例触发
    leaveHandler (item) {
      if (!this.chart) return
      this.chart.dispatchAction({
        type: 'downplay',
        name: item.title
      })
    },
    // 选中切换
    clickHandler (item) {
      if (!this.chart) return
      item.selected = !item.selected
      this.chart.dispatchAction({
        type: 'legendToggleSelect',
        name: item.title
      })
    }
  }
}
script>

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