g-cesium-map/public/map/components/charts/WaveLineChart.vue

<template>
  <div ref="chartContainer" class="wave-line-chart-container"></div>
</template>

<script setup lang="ts">
import { ref, onMounted, onBeforeUnmount, watch } from 'vue'
import * as echarts from 'echarts'

// 定义组件属性
interface Props {
  chartData?: Array<{ name: string; value: number }>
  title?: string
  color?: string
  magnifyMode?: boolean
}

const props = withDefaults(defineProps<Props>(), {
  chartData: () => [],
  title: '',
  color: '#1296db',
  magnifyMode: false
})

// 图表容器引用和实例
const chartContainer = ref<HTMLDivElement | null>(null)
let chartInstance: echarts.ECharts | null = null

// 初始化图表
const initChart = () => {
  if (chartContainer.value) {
    chartInstance = echarts.init(chartContainer.value)
    updateChart()
  }
}

// 更新图表
const updateChart = () => {
  if (!chartInstance || !props.chartData.length) return

  // 创建波浪效果的数据点
  const waveData = props.chartData.map(item => {
    return {
      ...item,
      value: item.value
    }
  })

  const option = {
    title: {
      // text: props.title,
      textStyle: {
        color: '#fff',
        fontSize: props.magnifyMode ? 24 : 14
      },
      left: 'center'
    },
    tooltip: {
      trigger: 'axis',
      backgroundColor: 'rgba(0, 0, 0, 0.7)',
      borderColor: 'rgba(30, 120, 255, 0.4)',
      borderWidth: 1,
      textStyle: {
        color: '#fff',
        fontSize: props.magnifyMode ? 20 : 12
      }
    },
    xAxis: {
      type: 'category',
      data: props.chartData.map(item => item.name),
      axisLine: {
        lineStyle: {
          color: 'rgba(255, 255, 255, 0.3)'
        }
      },
      axisLabel: {
        color: 'rgba(255, 255, 255, 0.7)',
        fontSize: props.magnifyMode ? 18 : 10,
        rotate: 0,
        interval: Math.ceil(props.chartData.length / 12), // 减少间隔以显示更多标签
        formatter: (value: string) => {
          // 更灵活的时间格式化
          if (value.includes(':')) {
            const parts = value.split(':');
            if (parts.length >= 2) {
              // 如果是完整的时间格式 HH:mm:ss
              if (parts[2] && parts[2] === '00') {
                return parts[0] + ':' + parts[1];
              }
              // 如果是 HH:mm 格式
              return parts[0] + ':' + parts[1];
            }
          }
          return value;
        },
        margin: 10
      }
    },
    yAxis: {
      type: 'value',
      // 设置 Y 轴最小值略低于数据中的最小值，以提供更好的可视化效果
      min: (value: any) => {
        if (props.chartData && props.chartData.length > 0) {
          const minValue = props.chartData[0].value
          // 计算一个合适的最小值，略低于实际最小值
          // const range = value.max - minValue;
          return minValue; // 最小值不低于0
        }
        return undefined;
      },
      axisLine: {
        lineStyle: {
          color: 'rgba(255, 255, 255, 0.3)'
        }
      },
      splitLine: {
        lineStyle: {
          color: 'rgba(255, 255, 255, 0.1)'
        }
      },
      axisLabel: {
        color: 'rgba(255, 255, 255, 0.7)',
        fontSize: props.magnifyMode ? 18 : 10
      }
    },
    series: [
      {
        data: waveData.map(item => item.value),
        type: 'line',
        smooth: true,
        showSymbol: true,
        symbol: 'circle',
        symbolSize: props.magnifyMode ? 8 : 4,
        lineStyle: {
          color: props.color,
          width: props.magnifyMode ? 4 : 2
        },
        areaStyle: {
          color: {
            type: 'linear',
            x: 0,
            y: 0,
            x2: 0,
            y2: 1,
            colorStops: [
              {
                offset: 0,
                color: props.color + '80' // 添加透明度
              },
              {
                offset: 1,
                color: props.color + '00' // 透明
              }
            ]
          }
        },
        // 添加波浪效果的特殊配置
        emphasis: {
          focus: 'series'
        },
        // 显示数据点和数值
        label: {
          show: true,
          position: 'top',
          color: '#fff',
          fontSize: props.magnifyMode ? 16 : 10,
          formatter: '{c}',
          distance: props.magnifyMode ? 10 : 5
        }
      },
      // 添加一个辅助系列来增强波浪视觉效果
      {
        data: props.chartData.map(item => item.value),
        type: 'line',
        smooth: true,
        showSymbol: false,
        lineStyle: {
          color: props.color + '60',
          width: props.magnifyMode ? 2 : 1,
          type: 'dashed'
        },
        // 辅助系列不显示数据标签以避免重叠
        label: {
          show: false
        }
      }
    ],
    grid: {
      left: '1%',
      right: '1%',
      top: props.title ? (props.magnifyMode ? '10%' : '15%') : '5%',
      bottom: '1%',
      containLabel: true
    }
  }

  chartInstance.setOption(option)
}

// 监听数据变化
watch(
  () => props.chartData,
  () => {
    updateChart()
  },
  { deep: true }
)

// 窗口大小改变时重绘图表
const handleResize = () => {
  if (chartInstance) {
    chartInstance.resize()
  }
}

// 组件挂载时初始化图表
onMounted(() => {
  // 延迟初始化，确保DOM已经完全渲染
  setTimeout(() => {
    initChart()
  }, 200)
  window.addEventListener('resize', handleResize)
})

// 组件销毁前清理资源
onBeforeUnmount(() => {
  window.removeEventListener('resize', handleResize)
  if (chartInstance) {
    chartInstance.dispose()
    chartInstance = null
  }
})
</script>

<style scoped>
.wave-line-chart-container {
  width: 100%;
  height: 100%;
  min-height: 0;
}
</style>