<template>
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<el-card class="chart-card" shadow="never" :loading="loading">
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<template #header>
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<div class="flex items-center">
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<span class="text-base font-medium text-gray-600">设备数量统计</span>
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</div>
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</template>
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<div v-if="loading && !hasData" class="h-[240px] flex justify-center items-center">
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<el-empty description="加载中..." />
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</div>
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<div v-else-if="!hasData" class="h-[240px] flex justify-center items-center">
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<el-empty description="暂无数据" />
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</div>
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<div v-else ref="deviceCountChartRef" class="h-[240px]"></div>
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</el-card>
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</template>
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<script lang="ts" setup>
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import * as echarts from 'echarts/core'
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import { PieChart } from 'echarts/charts'
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import { CanvasRenderer } from 'echarts/renderers'
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import { TooltipComponent, LegendComponent } from 'echarts/components'
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import { LabelLayout } from 'echarts/features'
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import { IotStatisticsSummaryRespVO } from '@/api/iot/statistics'
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import type { PropType } from 'vue'
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/** 【设备数量】统计卡片 */
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defineOptions({ name: 'DeviceCountCard' })
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const props = defineProps({
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statsData: {
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type: Object as PropType<IotStatisticsSummaryRespVO>,
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required: true
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},
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loading: {
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type: Boolean,
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default: false
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}
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})
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const deviceCountChartRef = ref()
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/** 是否有数据 */
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const hasData = computed(() => {
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if (!props.statsData) return false
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const categories = Object.entries(props.statsData.productCategoryDeviceCounts || {})
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return categories.length > 0 && props.statsData.deviceCount !== -1
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})
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/** 初始化图表 */
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const initChart = () => {
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// 如果没有数据，则不初始化图表
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if (!hasData.value) return
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// 确保 DOM 元素存在且已渲染
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if (!deviceCountChartRef.value) {
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console.warn('图表DOM元素不存在')
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return
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}
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echarts.use([TooltipComponent, LegendComponent, PieChart, CanvasRenderer, LabelLayout])
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try {
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const chart = echarts.init(deviceCountChartRef.value)
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chart.setOption({
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tooltip: {
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trigger: 'item'
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},
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legend: {
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top: '5%',
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right: '10%',
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align: 'left',
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orient: 'vertical',
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icon: 'circle'
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},
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series: [
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{
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name: 'Access From',
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type: 'pie',
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radius: ['50%', '80%'],
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avoidLabelOverlap: false,
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center: ['30%', '50%'],
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label: {
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show: false,
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position: 'outside'
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},
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emphasis: {
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label: {
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show: true,
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fontSize: 20,
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fontWeight: 'bold'
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}
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},
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labelLine: {
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show: false
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},
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data: Object.entries(props.statsData.productCategoryDeviceCounts).map(
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([name, value]) => ({
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name,
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value
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})
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)
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}
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]
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})
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return chart
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} catch (error) {
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console.error('初始化图表失败:', error)
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return null
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}
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}
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/** 监听数据变化 */
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watch(
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() => props.statsData,
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() => {
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// 使用 nextTick 确保 DOM 已更新
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nextTick(() => {
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initChart()
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})
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},
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{ deep: true }
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)
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/** 组件挂载时初始化图表 */
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onMounted(async () => {
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// 使用 nextTick 确保 DOM 已更新
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await nextTick(() => {
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initChart()
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})
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})
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</script>
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