<template>
  <div id="area-bar" class="container"/>
</template>

<script>

import * as echarts from 'echarts';
var SData1 = [10, 13, 1, 18, 15, 19, 18, 10, 16, 14, 10, 12,10, 13, 10, 18, 15, 19, 18, 10, 16, 14, 10, 12];
var SData = [20, 13, 30, 28, 35, 29, 18, 20, 26, 24, 30, 32,20, 13, 3, 28, 35, 29, 18, 2, 26, 24, 3, 32];
var SData2 = [12,16,18,19,14,16,12,16,18,19,14,16,12,16,18,19,14,16,12,16,18,19,14,16]
export default {
  name: 'AreaBar',
  data() {
    return {
      timer: null,
      height: '0',
      extend: {
        legend: {
          textStyle: {
            color: '#cce9ff',
            fontWeight: 'bold'
          },
          lineStyle: {
            width: 5
          },
          data: ['重大', '较大', '一般']
        },
        tooltip: {
          trigger: 'axis',
          axisPointer: {
            label: {
              backgroundColor: '#82b4dc'
            }
          }
        },
        grid: {
          left: '1%',
          right: '1%',
          bottom: '1%',
          top: '15%',
          containLabel: true
        },
        xAxis: {
          type: 'category',
          axisLabel: {
            color: '#cce9ff'
          },
          axisTick: { show: false },
          axisLine: {
            lineStyle: {
              color: '#cce9ff'
            }
          },
          data: ['1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12', '13', '14', '15', '16', '17', '18', '19', '20', '21', '22', '23']
        },
        yAxis: {
          position: 'left',
          type: 'value',
          axisLabel: {
            color: '#cce9ff'
          },
          axisLine: {
            lineStyle: {
              color: '#cce9ff'
            }
          }
        },
        dataZoom: [{
          show: false,
          xAxisIndex: [0],
          type: 'slider',
          startValue: 0,
          endValue: 4
        }],
        series: [
          {
            label: {
              color: '#cce9ff',
              show: true,
              align: 'center',
              verticalAlign: 'middle',
              position: 'top',
              distance: 5
            },
            name: '重大',
            type: 'bar',
            itemStyle: {
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                { offset: 1, color: 'rgba(184,215,243,0.8)' },
                { offset: 0.3, color: '#188df0cc' },
                { offset: 0, color: '#188df0cc' }
              ])
            },
            emphasis: {
              focus: 'series',
              itemStyle: {
                color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  { offset: 0, color: '#2378f7cc' },
                  { offset: 0.7, color: '#2378f7cc' },
                  { offset: 1, color: 'rgba(184,215,243,0.8)' }
                ])
              }
            },
            data: SData
          },
          {
            label: {
              color: '#cce9ff',
              show: true,
              align: 'center',
              verticalAlign: 'middle',
              position: 'top',
              distance: 5
            },
            name: '较大',
            type: 'bar',
            itemStyle: {
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                { offset: 1, color: 'rgba(195,250,235,0.8)' },
                { offset: 0.3, color: 'rgba(0,253,232,0.8)' },
                { offset: 0, color: 'rgba(0,178,172,0.8)' }
              ])
            },
            emphasis: {
              focus: 'series',
              itemStyle: {
                color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  { offset: 0, color: 'rgba(0,253,232,0.8)' },
                  { offset: 0.7, color: 'rgba(0,178,172,0.8)' },
                  { offset: 1, color: 'rgba(195,250,235,0.8)' }
                ])
              }
            },
            data: SData1
          },
          {
            label: {
              color: '#cce9ff',
              show: true,
              align: 'center',
              verticalAlign: 'middle',
              position: 'top',
              distance: 5
            },
            name: '一般',
            type: 'bar',
            itemStyle: {
              color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                { offset: 1, color: 'rgba(250,224,198,0.8)' },
                { offset: 0.3, color: '#ff9913cc' },
                { offset: 0, color: '#FFB005CC' }
              ])
            },
            emphasis: {
              focus: 'series',
              itemStyle: {
                color: new echarts.graphic.LinearGradient(0, 0, 0, 1, [
                  { offset: 0, color: '#ff9913cc' },
                  { offset: 0.7, color: '#FFB005CC' },
                  { offset: 1, color: 'rgba(250,224,198,0.8)' }
                ])
              }
            },
            data: SData2
          }
        ]
      }
    }
  },
  mounted() {
    var myChart = echarts.init(document.getElementById('area-bar'))
    const that = this
    this.timer = setInterval(function() {
      // 每次向后滚动一个，最后一个从头开始。
      if (that.extend.dataZoom[0].endValue === 23) {
        that.extend.dataZoom[0].endValue = 4
        that.extend.dataZoom[0].startValue = 0
      } else {
        that.extend.dataZoom[0].endValue = that.extend.dataZoom[0].endValue + 1
        that.extend.dataZoom[0].startValue = that.extend.dataZoom[0].startValue + 1
      }
      myChart.setOption(that.extend, true)
    }, 2000)
    myChart.clear()
    myChart.setOption(that.extend, true)
    window.addEventListener('resize', function() {
      myChart.resize()
    })
  },
  beforeDestroy() {
    clearInterval(this.timer)
    this.timer = null
  },
  methods: {
  }
}
</script>
<style lang="scss" scoped>
.container {
  width: 100%;
  height: 200px;
}
</style>