<template>
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<div class="water-velocity-content" v-loading="localLoading" element-loading-text="流速数据加载中..."
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element-loading-background="rgba(11, 34, 20, 0.3)">
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<div v-if="showSelectPrompt" style="font-weight: bold;">
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请在地图中选取唯一测量点
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</div>
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<div v-else>
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<div class="location-info">
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<h3>位置信息</h3>
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<p v-if="deviceName" class="coordinates">
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{{ deviceName }}
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</p>
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<p v-if="!deviceName" class="coordinates">
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经度： <strong>{{ safeCurrentInfo.longitude.toFixed(3) }} </strong>
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纬度：<strong>{{ safeCurrentInfo.latitude.toFixed(3) }}</strong>
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</p>
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</div>
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<div class="velocity-info">
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<h3>流速信息 (m/s)</h3>
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<p>
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平均：<strong>{{ avgVelocity }}</strong>
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最大：<strong>{{ maxVelocity }}</strong>
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最小：<strong>{{ minVelocity }}</strong>
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</p>
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</div>
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</div>
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<div class="chart-placeholder">
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<div ref="chartDom" style="width: 100%; height: 300px;"></div>
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</div>
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</div>
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</template>
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<script setup>
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import { ref, onMounted, watch, computed, onBeforeUnmount } from 'vue';
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import * as echarts from 'echarts';
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import { useSimStore } from '@/store/simulation';
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import { storeToRefs } from 'pinia';
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import { getFlowRate } from '@/api/trApi.js'; // 假设你有真实接口
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import { EventBus } from '@/eventBus';
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import { ElMessage } from 'element-plus';
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const simStore = useSimStore();
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const { currentInfo } = storeToRefs(simStore);
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const deviceName = computed(() => {
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return currentInfo.value?.deviceName;
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});
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// 图表 DOM 引用
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const chartDom = ref(null);
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let myChart = null;
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// 加载状态变量
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const localLoading = ref(false); // <<< 新增局部 loading 变量
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// 安全获取经纬度
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const safeCurrentInfo = computed(() => {
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const info = currentInfo.value || {};
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return {
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longitude: info.longitude !== undefined ? info.longitude : 0.0,
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latitude: info.latitude !== undefined ? info.latitude : 0.0
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};
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});
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// 是否显示选择提示
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const showSelectPrompt = computed(() => {
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const info = safeCurrentInfo.value;
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return info.longitude === 0.0 && info.latitude === 0.0;
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});
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// 计算平均、最大、最小流速
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const avgVelocity = computed(() => {
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if (!myData.value.length) return '--';
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const sum = myData.value.reduce((acc, cur) => acc + cur.velocity, 0);
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return (sum / myData.value.length).toFixed(2);
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});
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const maxVelocity = computed(() => {
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if (!myData.value.length) return '--';
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return Math.max(...myData.value.map(d => d.velocity)).toFixed(2);
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});
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const minVelocity = computed(() => {
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if (!myData.value.length) return '--';
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return Math.min(...myData.value.map(d => d.velocity)).toFixed(2);
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});
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// 数据缓存
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const myData = ref([]);
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// 防抖函数
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function debounce(func, wait) {
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let timeout;
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return function () {
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const context = this;
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const args = arguments;
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clearTimeout(timeout);
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timeout = setTimeout(() => {
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func.apply(context, args);
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}, wait);
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};
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}
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// 时间格式化工具函数
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function formatDateTime(date) {
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const d = new Date(date);
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const year = d.getFullYear();
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const month = String(d.getMonth() + 1).padStart(2, '0'); // 月份从 0 开始
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const day = String(d.getDate()).padStart(2, '0');
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const hours = String(d.getHours()).padStart(2, '0');
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const minutes = String(d.getMinutes()).padStart(2, '0');
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const seconds = String(d.getSeconds()).padStart(2, '0');
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return `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;
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}
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// 获取并更新图表
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async function fetchDataAndUpdateChart(chart) {
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const info = currentInfo.value;
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if (!info || showSelectPrompt.value || !chartDom.value) return;
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const { longitude, latitude, serviceInfo } = info;
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localLoading.value = true;
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const result = await getFlowRateInfo(longitude, latitude, serviceInfo);
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if (result && Array.isArray(result)) {
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myData.value = result;
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const option = {
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title: {
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text: '流速变化趋势',
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textStyle: {
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color: '#fff',
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fontSize: 16
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},
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left: '-1%'
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},
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tooltip: {
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trigger: 'axis',
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formatter: (params) => {
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const dateStr = formatDateTime(params[0].value[0]);
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return `${dateStr}<br/>流速：${params[0].value[1].toFixed(4)} m/s`;
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},
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backgroundColor: 'rgba(0,0,0,0.7)',
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textStyle: {
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color: '#fff',
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fontSize: 14
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}
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},
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xAxis: {
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type: 'time',
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name: '',
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axisLabel: {
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color: '#fff',
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fontSize: 12,
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formatter: function (value) {
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const date = new Date(value);
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const year = date.getFullYear();
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const month = String(date.getMonth() + 1).padStart(2, '0'); // 月份从0开始
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const day = String(date.getDate()).padStart(2, '0');
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const hours = String(date.getHours()).padStart(2, '0');
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const minutes = String(date.getMinutes()).padStart(2, '0');
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const seconds = String(date.getSeconds()).padStart(2, '0');
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return `${month}-${day} \n${hours}:${minutes}`;
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},
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interval: 'auto',
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rotate: 45
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},
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nameTextStyle: {
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color: '#fff',
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fontSize: 14
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}
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},
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yAxis: {
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type: 'value',
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name: '流速(m/s)',
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min: 0,
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max: Math.max(...result.map(i => i.velocity)) + 0.05,
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axisLabel: {
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color: '#fff',
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fontSize: 12,
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formatter: value => value.toFixed(2)
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},
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nameTextStyle: {
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color: '#fff',
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fontSize: 14
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}
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},
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dataZoom: [
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{
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type: 'slider', // 滑块型缩放条
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start: 0, // 初始显示从 0% 开始
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end: 100, // 到 100%
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height: 20, // 缩放条高度
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bottom: 10, // 距离底部距离
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borderColor: 'rgba(255,255,255,0.3)',
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backgroundColor: 'rgba(50,50,50,0.3)',
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fillerColor: 'rgba(70,130,180,0.6)',
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textStyle: {
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color: '#fff'
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}
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},
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{
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type: 'inside',
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start: 0,
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end: 100
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}
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],
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series: [{
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name: '流速',
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type: 'line',
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data: result.map(item => [new Date(item.time), item.velocity]),
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showSymbol: true,
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lineStyle: {
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color: '#3268fe',
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width: 2
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},
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itemStyle: {
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color: '#3268fe'
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},
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smooth: false,
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progressive: 0
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}],
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textStyle: {
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color: '#fff',
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fontSize: 14
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},
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animation: false
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};
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chart.setOption(option, true);
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}
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localLoading.value = false;
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}
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// 初始化图表
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function initChart(chart) {
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fetchDataAndUpdateChart(chart);
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}
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// 获取真实数据
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function getFlowRateInfo(lon, lat, serviceInfo) {
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const params = {
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lon: lon,
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lat: lat,
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serviceName: serviceInfo
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};
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return getFlowRate(params).then(data => {
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// console.log('获取到的数据:', data);
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if (data && data.code === 200) {
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return data.data; // 返回原始数据数组
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} else {
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return [];
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}
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}).catch(error => {
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console.error('获取数据时发生错误:', error);
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ElMessage.warning('数据有误，请联系管理员或重新进行模拟！');
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return [];
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});
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}
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// 监听 currentInfo 变化
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watch(
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() => currentInfo.value,
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async (newVal) => {
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if (!newVal || showSelectPrompt.value || !chartDom.value) return;
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// 销毁旧图表
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if (myChart) {
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myChart.dispose();
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}
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// 创建新图表
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myChart = echarts.init(chartDom.value);
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await fetchDataAndUpdateChart(myChart);
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},
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{ deep: true }
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);
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onMounted(() => {
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if (!showSelectPrompt.value && chartDom.value) {
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myChart = echarts.init(chartDom.value);
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initChart(myChart);
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// 添加 resize 监听器
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window.addEventListener('resize', debounce(() => {
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if (myChart) myChart.resize();
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}, 200));
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}
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// 注册事件总线监听
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EventBus.on('clear-water-velocity', clear);
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});
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onBeforeUnmount(() => {
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window.removeEventListener('resize', debounce(() => {
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if (myChart) myChart.resize();
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}, 200));
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// 清理图表
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if (myChart) {
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myChart.dispose();
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myChart = null;
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}
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// 移除事件监听
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EventBus.off('clear-water-velocity', clear);
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});
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// 清空方法
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function clear() {
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// 清空 store 中的经纬度信息
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currentInfo.value.longitude = 0.0;
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currentInfo.value.latitude = 0.0;
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// 清除 ECharts 图表
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if (myChart) {
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myChart.clear(); // 清除图表数据和图形
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myChart.dispose(); // 销毁实例，释放资源
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myChart = null;
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}
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}
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// 暴露 resize 方法供外部调用
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function resizeChart() {
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if (myChart) {
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myChart.resize();
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}
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}
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defineExpose({ resizeChart });
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</script>
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<style scoped>
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.water-velocity-content {
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position: relative;
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padding-left: 8px;
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padding-top: 8px;
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border-radius: 6px;
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}
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.chart-placeholder {
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margin-top: 10px;
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}
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.location-info,
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.velocity-info {
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margin-bottom: 10px;
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}
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.coordinates {
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font-size: 15px;
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color: #fff;
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user-select: all;
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display: inline-block;
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border-radius: 4px;
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transition: background-color 0.2s ease;
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}
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.velocity-info p {
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font-size: 14px;
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color: #fff;
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}
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.velocity-info strong {
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color: #fff;
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margin: 0 4px;
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}
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</style>
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