<template>
  <div class="mod-demo-echarts">
    <el-row :gutter="20">
      <el-col :span="24">
        <el-card>
          <div id="J_chartBarBox" class="chart-box"></div>
        </el-card>
      </el-col>
    </el-row>
  </div>
</template>

<script>
  import echarts from 'echarts'
  export default {
    data () {
      return {
        chartBar: null
      }
    },
    mounted () {
      this.initChartBar()
    },
    activated () {
      // 由于给echart添加了resize事件, 在组件激活时需要重新resize绘画一次, 否则出现空白bug
      if (this.chartBar) {
        this.chartBar.resize()
      }
    },
    methods: {
      // 柱状图
      initChartBar () {
        var option = {
          tooltip: {
            trigger: 'axis',
            axisPointer: {
              type: 'shadow'
            }
          },
          legend: {
            data: ['直接访问', '邮件营销', '联盟广告', '视频广告', '搜索引擎', '百度', '谷歌', '必应', '其他']
          },
          grid: {
            left: '3%',
            right: '4%',
            bottom: '3%',
            containLabel: true
          },
          xAxis: [
            {
              type: 'category',
              data: ['周一', '周二', '周三', '周四', '周五', '周六', '周日']
            }
          ],
          yAxis: [
            {
              type: 'value'
            }
          ],
          series: [
            {
              name: '直接访问',
              type: 'bar',
              data: [320, 332, 301, 334, 390, 330, 320]
            },
            {
              name: '邮件营销',
              type: 'bar',
              stack: '广告',
              data: [120, 132, 101, 134, 90, 230, 210]
            },
            {
              name: '联盟广告',
              type: 'bar',
              stack: '广告',
              data: [220, 182, 191, 234, 290, 330, 310]
            },
            {
              name: '视频广告',
              type: 'bar',
              stack: '广告',
              data: [150, 232, 201, 154, 190, 330, 410]
            },
            {
              name: '搜索引擎',
              type: 'bar',
              data: [862, 1018, 964, 1026, 1679, 1600, 1570],
              markLine: {
                lineStyle: {
                  normal: {
                    type: 'dashed'
                  }
                },
                data: [
                  [{ type: 'min' }, { type: 'max' }]
                ]
              }
            },
            {
              name: '百度',
              type: 'bar',
              barWidth: 5,
              stack: '搜索引擎',
              data: [620, 732, 701, 734, 1090, 1130, 1120]
            },
            {
              name: '谷歌',
              type: 'bar',
              stack: '搜索引擎',
              data: [120, 132, 101, 134, 290, 230, 220]
            },
            {
              name: '必应',
              type: 'bar',
              stack: '搜索引擎',
              data: [60, 72, 71, 74, 190, 130, 110]
            },
            {
              name: '其他',
              type: 'bar',
              stack: '搜索引擎',
              data: [62, 82, 91, 84, 109, 110, 120]
            }
          ]
        }
        this.chartBar = echarts.init(document.getElementById('J_chartBarBox'))
        this.chartBar.setOption(option)
        window.addEventListener('resize', () => {
          this.chartBar.resize()
        })
      }
    }
  }
</script>

<style lang="scss">
  .mod-demo-echarts {
    > .el-alert {
      margin-bottom: 10px;
    }
    > .el-row {
      margin-top: -10px;
      margin-bottom: -10px;
      .el-col {
        padding-top: 10px;
        padding-bottom: 10px;
      }
    }
    .chart-box {
      min-height: 400px;
    }
  }
</style>
