<template>
  <div class="chart-container app-container nohead">
    <div id="chart" style="height:530px;margin-top:30px;"></div>
  </div>
</template>

<script>

import * as echarts from 'echarts';
import resize from '../mixins/resize'
export default {
  name: 'extend-graphDemo-echartsLineBar',
  mixins: [resize],
  data() {
    return {
      chart: null,
      option: {
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            type: 'cross',
            crossStyle: {
              color: '#999'
            }
          }
        },
        toolbox: {
          feature: {
            dataView: { show: true, readOnly: false },
            magicType: { show: true, type: ['line', 'bar'] },
            restore: { show: true },
          }
        },
        legend: {
          data: ['蒸发量', '降水量', '平均温度']
        },
        xAxis: [
          {
            type: 'category',
            data: ['1月', '2月', '3月', '4月', '5月', '6月', '7月', '8月', '9月', '10月', '11月', '12月'],
            axisPointer: {
              type: 'shadow'
            }
          }
        ],
        yAxis: [
          {
            type: 'value',
            name: '水量',
            min: 0,
            max: 250,
            interval: 50,
            axisLabel: {
              formatter: '{value} ml'
            }
          },
          {
            type: 'value',
            name: '温度',
            min: 0,
            max: 25,
            interval: 5,
            axisLabel: {
              formatter: '{value} °C'
            }
          }
        ],
        series: [
          {
            name: '蒸发量',
            type: 'bar',
            data: [2.0, 4.9, 7.0, 23.2, 25.6, 76.7, 135.6, 162.2, 32.6, 20.0, 6.4, 3.3]
          },
          {
            name: '降水量',
            type: 'bar',
            data: [2.6, 5.9, 9.0, 26.4, 28.7, 70.7, 175.6, 182.2, 48.7, 18.8, 6.0, 2.3]
          },
          {
            name: '平均温度',
            type: 'line',
            yAxisIndex: 1,
            data: [2.0, 2.2, 3.3, 4.5, 6.3, 10.2, 20.3, 23.4, 23.0, 16.5, 12.0, 6.2]
          }
        ]
      }
    }
  },
  mounted() {
    this.initChart()
  },
  beforeDestroy() {
    if (!this.chart) {
      return
    }
    this.chart.dispose()
    this.chart = null
  },
  methods: {
    initChart() {
      this.chart = echarts.init(document.getElementById('chart'))
      this.chart.setOption(this.option)
    }
  }
}
</script>
