<template>
  <div ref="chart" style="width: 30rem; height: 15rem;"></div>
</template>

<script>
import * as echarts from 'echarts';

export default {
  name: 'RingChart',
  mounted() {
    this.renderChart();
  },
  methods: {
    renderChart() {
      const chartDom = this.$refs.chart;
      const myChart = echarts.init(chartDom);

      const option = {
        tooltip: {
          trigger: 'item'
        },
        legend: {
          orient: 'vertical', // 图例垂直排列
          right: '10%', // 图例在右侧
          top: 'center', // 图例垂直居中
          itemGap: 20, //右侧间隔
          formatter: function (name) {
            // 自定义图例显示格式
            const data = [
              { value: 54, name: '高贸区' , itemStyle:{color:'#36C3FB'}},
              { value: 65, name: '科创区' , itemStyle:{color:'#5B76F9'} },
              { value: 32, name: '度假区' , itemStyle:{color:'#F08445'} },
              { value: 25, name: '商务区' , itemStyle:{color:'#F6B600'} },
              { value: 15, name: '苏相合作区' , itemStyle:{color:'#50DFB3'} }
            ];
            // 文本标签
            const item = data.find(item => item.name === name);
            return `${name} ${item.value}个 ${((item.value / 384) * 100).toFixed(1)}%`;
          }
        },
        series: [
          {
            name: '项目分布',
            type: 'pie',
            radius: ['40%', '60%'], 
            center: ['30%', '50%'], 
            data: [
              { value: 54, name: '高贸区' , itemStyle:{color:'#36C3FB'}},
              { value: 65, name: '科创区' , itemStyle:{color:'#5B76F9'} },
              { value: 32, name: '度假区' , itemStyle:{color:'#F08445'} },
              { value: 25, name: '商务区' , itemStyle:{color:'#F6B600'} },
              { value: 15, name: '苏相合作区' , itemStyle:{color:'#50DFB3'} }
            ],
            label: {
              show: false // 隐藏饼图内部的标签
            },
            emphasis: {
              itemStyle: {
                shadowBlur: 10,
                shadowOffsetX: 0,
                shadowColor: 'rgba(0, 0, 0, 0.5)'
              }
            }
          }
        ]
      };

      myChart.setOption(option);
    }
  }
};
</script>

<style scoped>
/* 你可以在这里添加样式 */
</style>