<template>
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<BaseCard size="medium">
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<template #content>
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<div ref="lineChart" class="line-chart"></div>
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</template>
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<template #footer>
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<!-- 单页数据量-->
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<SliderBar
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v-model:progress="progress"
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@size-change="(e) => (pageSize = e)"
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></SliderBar>
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</template>
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</BaseCard>
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</template>
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<script>
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import * as echarts from 'echarts';
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import { FactorDatas } from '@/model/FactorDatas';
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import { factorName } from '@/constant/factor-name';
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import { factorLineOption } from '@/utils/chart/chart-option';
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// 带可拖动进度条的折线图
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export default {
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props: {
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loading: Boolean,
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factorDatas: {
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type: FactorDatas
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// default: () => new FactorDatas()
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},
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selectFactorType: {
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type: Array,
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default: () => ['1']
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},
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// 当前选中高亮的数据点索引
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locateIndex: Number
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},
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data() {
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return {
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allXAxis: [],
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allSeries: [],
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option: null,
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pageSize: 200,
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progress: 0,
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// 对应progress进度下，所展示数据的起始索引
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sIndex: 0
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};
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},
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emits: ['chartClick'],
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watch: {
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factorDatas: {
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handler() {
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this.initData();
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this.changeChartRange();
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},
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deep: true
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},
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selectFactorType: {
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handler() {
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this.changeChartSeries();
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}
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},
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progress() {
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this.changeChartRange();
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},
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pageSize() {
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this.changeChartRange();
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},
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locateIndex(nV, oV) {
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if (nV == oV) return;
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for (const iterator of this.allSeries) {
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// if (iterator.name == factorName || (iterator.name == 'TVOC' || factorName == 'VOC')) {
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iterator.markLine = {
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symbol: 'none',
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data: [
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{
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name: '选中',
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xAxis: this.allXAxis[nV],
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label: {
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color: 'white'
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},
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lineStyle: {
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color: 'yellow'
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}
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}
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]
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};
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}
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// 计算超出单页数据量的长度
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let len = this.allXAxis.length - this.pageSize;
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len = len < 0 ? 0 : len;
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// 定位点应该展示在趋势图中间，因此定位百分比往前偏移当前_size的一半
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let i = nV - parseInt(this.pageSize / 2);
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// 确保索引不会超出范围
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i = i < 0 ? 0 : i;
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i = i > len ? len : i;
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// 获取索引对应的进度百分比
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const _progress = len == 0 ? 0 : (i / len) * 100;
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if (this.progress != _progress) {
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this.progress = _progress;
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} else {
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this.changeChartRange();
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}
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}
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},
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methods: {
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initData() {
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this.allXAxis = this.factorDatas.times.map((v) => {
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return v.split(' ')[1];
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});
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const res = [];
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for (const key in this.factorDatas.factor) {
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if (Object.hasOwnProperty.call(this.factorDatas.factor, key)) {
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const e = this.factorDatas.factor[key];
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res.push({
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key: key,
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name: factorName[e.factorName],
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type: 'line',
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allData: e.datas.map((v) => v.factorData),
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data: e.datas.map((v) => v.factorData),
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showAllSymbol: true,
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animationDelay: function (idx) {
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return idx * 10;
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}
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});
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}
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}
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this.allSeries = res;
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},
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// 修改图表展示的折线图类型
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changeChartSeries() {
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const { sIndex, eIndex, startPer, endPer } = this.getRange();
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this.option.series = this.getShowSeries(sIndex, eIndex);
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this.lineChart.setOption(this.option, { notMerge: true });
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},
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changeChartRange() {
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const { sIndex, eIndex, startPer, endPer } = this.getRange();
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const showSeries = this.getShowSeries(sIndex, eIndex);
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const xAxis = this.getShowXAxis(sIndex, eIndex);
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if (!this.option) {
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this.option = factorLineOption(xAxis, showSeries);
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} else {
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this.option.xAxis.data = xAxis;
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this.option.series = showSeries;
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}
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// this.option.dataZoom[0].start = startPer;
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// this.option.dataZoom[0].end = endPer;
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this.lineChart.setOption(this.option, { notMerge: true });
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},
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getShowXAxis(sIndex, eIndex) {
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return this.allXAxis.slice(sIndex, eIndex);
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},
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getShowSeries(sIndex, eIndex) {
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this.allSeries.forEach((s) => {
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s.data = s.allData.slice(sIndex, eIndex);
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});
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const res = this.allSeries.filter((s) => {
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return this.selectFactorType.includes(s.key);
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});
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return res;
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},
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getRange() {
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let len = this.allXAxis.length - this.pageSize;
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len = len < 0 ? 0 : len;
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const sIndex = Math.round((len * this.progress) / 100);
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const eIndex = sIndex + this.pageSize;
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const startPer = (this.sIndex / this.allXAxis.length) * 100;
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const endPer = (eIndex / this.allXAxis.length) * 100;
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this.sIndex = sIndex;
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return { sIndex, eIndex, startPer, endPer };
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}
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},
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beforeUnmount() {
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// this.$refs.lineChart && this.$refs.lineChart.clear();
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},
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mounted() {
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this.lineChart = echarts.init(this.$refs.lineChart);
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this.lineChart.on('click', (e) => {
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this.$emit('chartClick', this.sIndex + e.dataIndex);
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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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.line-chart {
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/* width: 200px; */
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height: 280px;
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}
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</style>
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