157 lines
4.8 KiB
Vue
157 lines
4.8 KiB
Vue
<template>
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<!-- Echarts图表容器,必须设置宽高,绑定ref用于获取DOM -->
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<div class="line-chart-container" ref="chartRef"></div>
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</template>
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<script>
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// Vue2 推荐这种引入方式,适配绝大多数echarts版本
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import * as echarts from 'echarts'
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export default {
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name: 'LineChart',
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props: {
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data: {
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type: Array,
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default: () => []
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}
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},
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data() {
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return {
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// 存储echarts实例对象,防止重复渲染
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chartInstance: null
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}
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},
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mounted() {
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// 组件挂载完成初始化图表
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this.initEcharts()
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// 监听浏览器窗口大小变化,图表自适应
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window.addEventListener('resize', this.resizeChart)
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},
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beforeDestroy() {
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// Vue2 销毁生命周期【重点】,不是beforeUnmount
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// 销毁实例+解绑监听,防止内存泄漏
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window.removeEventListener('resize', this.resizeChart)
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if (this.chartInstance) {
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this.chartInstance.dispose()
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this.chartInstance = null
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}
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},
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watch: {
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// 深度监听父组件传入的data数据,数据更新时重新渲染图表【核心】
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data: {
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deep: true,
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immediate: true,
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handler() {
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// 数据变化时,先判断实例是否存在,存在则重新渲染
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this.chartInstance && this.initEcharts()
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}
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}
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},
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methods: {
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// 初始化echarts图表核心方法
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initEcharts() {
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const chartDom = this.$refs.chartRef
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// 防止重复初始化,先销毁再创建
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if (this.chartInstance) {
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this.chartInstance.dispose()
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}
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// 初始化图表实例
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this.chartInstance = echarts.init(chartDom)
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// 1. 浅拷贝原数组 + 按planDate日期升序排序,生成新数组,不修改原this.data
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const sortedData = [...this.data].sort((a, b) => new Date(a.planDate) - new Date(b.planDate))
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// 2. 从排序后的新数组中,提取图表所需数据
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const xAxisData = sortedData.map(item => item.productName)
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const coilCountData = sortedData.map(item => item.coilCount)
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// 总重量字符串转数字,保证图表渲染正常
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const totalWeightData = sortedData.map(item => Number(item.totalWeight))
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// echarts核心配置项 - 双Y轴折线图
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const option = {
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// 图表内边距,防止内容溢出
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grid: { left: '3%', right: '10%', bottom: '3%', containLabel: true },
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// 鼠标悬浮提示框,展示精准数据
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tooltip: {
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trigger: 'axis',
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formatter: '{b}<br/>{a}: {c}',
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axisPointer: { type: 'cross' }
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},
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// 图例,可点击切换显隐对应折线
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legend: {
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data: ['总卷数', '总重量(吨)'],
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top: 10
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},
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// X轴 - 类目轴,展示收货计划名称
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xAxis: [
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{
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type: 'category',
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data: xAxisData,
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axisLabel: {
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// interval: 0, // 强制显示所有X轴标签,不隐藏
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fontSize: 12
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}
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}
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],
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// 双Y轴核心配置
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yAxis: [
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{
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// 左侧Y轴 - 对应【总卷数】
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type: 'value',
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name: '总卷数',
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nameTextStyle: { color: '#2db7f5' },
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axisLine: { lineStyle: { color: '#2db7f5' } }
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},
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{
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// 右侧Y轴 - 对应【总重量】
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type: 'value',
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name: '总重量(吨)',
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nameTextStyle: { color: '#ff6600' },
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axisLine: { lineStyle: { color: '#ff6600' } },
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splitLine: { show: false } // 关闭右侧网格线,避免页面杂乱
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}
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],
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// 折线图系列数据
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series: [
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{
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name: '总卷数',
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type: 'line',
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yAxisIndex: 0, // 指定绑定左侧Y轴
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data: coilCountData,
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smooth: true, // 平滑折线,更美观
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symbol: 'circle', // 拐点为圆点
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symbolSize: 6,
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lineStyle: { width: 2, color: '#2db7f5' },
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itemStyle: { color: '#2db7f5' }
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},
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{
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name: '总重量(吨)',
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type: 'line',
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yAxisIndex: 1, // 指定绑定右侧Y轴
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data: totalWeightData,
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smooth: true,
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symbol: 'circle',
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symbolSize: 6,
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lineStyle: { width: 2, color: '#ff6600' },
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itemStyle: { color: '#ff6600' }
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},
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]
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}
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// 设置配置项并渲染图表
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this.chartInstance.setOption(option)
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},
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// 图表自适应窗口大小
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resizeChart() {
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this.chartInstance && this.chartInstance.resize()
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}
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}
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}
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</script>
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<style scoped>
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/* 图表容器必须设置宽高,否则无法渲染,可根据需求修改尺寸 */
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.line-chart-container {
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width: 100%;
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height: 400px;
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}
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</style> |