<template>
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<div class="water-eval-container">
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<div
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class="cityGreenLand-charts"
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:id="ids"
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ref="chart_pie_3d"
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:style="{ width: pwidth, height: pheight }"
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></div>
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</div>
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</template>
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<script>
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import * as echarts from "echarts";
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import "echarts-gl";
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const color = [
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"#006CCC",
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"#08AE9C",
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"#fff",
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"#31CF92",
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"#fff",
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"#31CF92",
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"#CBC55C",
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"#35CCFF",
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];
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export default {
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name: "cityGreenLand",
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components: {},
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props: {
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ids: {
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type: String,
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default() {
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return "graphChart";
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},
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},
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pwidth: {
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type: String,
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default() {
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return "100%";
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},
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},
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pheight: {
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type: String,
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default() {
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return "100%";
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},
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},
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optionData: {
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type: Array,
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default() {
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return [
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{
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name: "林地",
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value: 10000,
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itemStyle: {},
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},
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{
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name: "草地",
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value: 12116,
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itemStyle: {},
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},
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{
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name: "河流",
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value: 13990,
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itemStyle: {},
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},
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{
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name: "山地",
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value: 14880,
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itemStyle: {},
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},
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];
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},
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},
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options: {
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type: Object,
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default() {
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return {};
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},
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},
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},
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data() {
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return {
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mouFlag: false,
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pieData: [],
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};
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},
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created() {
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this.pieData = JSON.parse(JSON.stringify(this.optionData));
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this.pieData.forEach((item) => {
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item.value = item.value * 10000;
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});
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},
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watch: {
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optionData: {
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handler(newVal) {
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if (newVal) {
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this.pieData = JSON.parse(JSON.stringify(newVal));
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this.pieData.forEach((item) => {
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item.value = item.value * 10000;
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});
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this.myChart.setOption(this.getPie3D(this.pieData, 0.8));
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}
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},
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deep: true,
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},
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},
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mounted() {
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this.pieData.map((item, index) => {
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if(!item.itemStyle.color){
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item.itemStyle.color = color[index];
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}
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});
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this.$nextTick(function () {
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this.init();
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});
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},
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deactivated() {
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window.removeEventListener('resize', this.myChart.resize)
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},
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methods: {
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init() {
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//构建3d饼状图
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this.myChart = echarts.init(document.getElementById(this.ids));
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// 传入数据生成 option
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if (this.pieData.length === 0) {
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return;
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}
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this.myChart.setOption(this.getPie3D(this.pieData, 0.8));
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window.addEventListener("resize", this.myChart.resize);
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this.bindListen(this.myChart);
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},
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getPie3D(pieData, internalDiameterRatio) {
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//internalDiameterRatio:透明的空心占比
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let that = this;
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let series = [];
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let sumValue = 0;
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let startValue = 0;
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let endValue = 0;
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let legendData = [];
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let legendBfb = [];
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let k = 1 - internalDiameterRatio;
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pieData.sort((a, b) => {
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return b.value - a.value;
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});
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// 为每一个饼图数据，生成一个 series-surface 配置
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for (let i = 0; i < pieData.length; i++) {
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sumValue += pieData[i].value;
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let seriesItem = {
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name:
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typeof pieData[i].name === "undefined"
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? `series${i}`
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: pieData[i].name,
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type: "surface",
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parametric: true,
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wireframe: {
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show: false,
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},
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pieData: pieData[i],
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pieStatus: {
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selected: false,
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hovered: false,
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k: k,
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},
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center: ["10%", "50%"],
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};
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if (typeof pieData[i].itemStyle != "undefined") {
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let itemStyle = {};
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typeof pieData[i].itemStyle.color != "undefined"
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? (itemStyle.color = pieData[i].itemStyle.color)
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: null;
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typeof pieData[i].itemStyle.opacity != "undefined"
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? (itemStyle.opacity = pieData[i].itemStyle.opacity)
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: null;
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seriesItem.itemStyle = itemStyle;
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}
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series.push(seriesItem);
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}
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// 使用上一次遍历时，计算出的数据和 sumValue，调用 getParametricEquation 函数，
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// 向每个 series-surface 传入不同的参数方程 series-surface.parametricEquation，也就是实现每一个扇形。
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legendData = [];
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legendBfb = [];
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for (let i = 0; i < series.length; i++) {
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endValue = startValue + series[i].pieData.value;
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series[i].pieData.startRatio = startValue / sumValue;
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series[i].pieData.endRatio = endValue / sumValue;
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series[i].parametricEquation = this.getParametricEquation(
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series[i].pieData.startRatio,
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series[i].pieData.endRatio,
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false,
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false,
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k,
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series[i].pieData.value
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);
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startValue = endValue;
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let bfb = that.fomatFloat(series[i].pieData.value / sumValue, 2);
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let afb = series[i].pieData.value;
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legendData.push({
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name: series[i].name,
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value: bfb,
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});
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legendBfb.push({
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name: series[i].name,
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value: afb,
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});
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}
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let boxHeight = this.getHeight3D(series, 12); //通过传参设定3d饼/环的高度，26代表26px
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// 准备待返回的配置项，把准备好的 legendData、series 传入。
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let option = {
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legend: {
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data: legendData,
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orient: "horizontal",
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// left: 'auto',
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top: 20,
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itemGap: 25,
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textStyle: {
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color: "#fff",
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},
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itemWidth: 15,
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itemHeight: 4,
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show: true,
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icon: "rect",
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formatter: function (param) {
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let item = legendBfb.filter((item) => item.name == param)[0];
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let bfs = item.value/10000;
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return `${item.name} ${bfs}`;
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},
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...(this.options.legend || {}),
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},
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labelLine: {
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show: false,
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lineStyle: {
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color: "red",
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},
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},
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label: {
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show: true,
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position: "outside",
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rich: {
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b: {
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color: "#7BC0CB",
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fontSize: 12,
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lineHeight: 20,
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},
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c: {
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fontSize: 16,
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},
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},
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formatter: "{b|{b} \n}{c|{c}}{b| }",
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},
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tooltip: {
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backgroundColor: "transparent", //设置背景图片 rgba格式
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color: "#fff",
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borderColor: "transparent", //设置边框颜色
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textStyle: {
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color: "#fff", //设置文字颜色
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},
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formatter: (params) => {
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if (
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params.seriesName !== "mouseoutSeries" &&
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params.seriesName !== "pie2d"
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) {
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let bfb = (
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(option.series[params.seriesIndex].pieData.endRatio -
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option.series[params.seriesIndex].pieData.startRatio) *
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100
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).toFixed(2);
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return (
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`<p style="border-top: 1px solid #3BFFE6;background-color:rgba(37,61,80,0.6);padding:10px;">${params.seriesName}<br/>` +
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`<span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>` +
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`${bfb}%</p>`
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);
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}
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},
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},
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xAxis3D: {
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min: -1,
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max: 1,
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},
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yAxis3D: {
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min: -1,
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max: 1,
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},
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zAxis3D: {
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min: -1,
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max: 1,
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},
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grid3D: {
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show: false,
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top: '14%',
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boxHeight: boxHeight, //圆环的高度
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viewControl: {
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//3d效果可以放大、旋转等，请自己去查看官方配置
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alpha: 40, //角度
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distance: 200, //调整视角到主体的距离，类似调整zoom
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rotateSensitivity: 0, //设置为0无法旋转
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zoomSensitivity: 0, //设置为0无法缩放
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panSensitivity: 0, //设置为0无法平移
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autoRotate: false, //自动旋转
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},
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...(this.options.grid3D || {}),
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},
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gird: {
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bottom: 0,
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...(this.options.grid || {}),
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},
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graphic: {
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elements: [
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{
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type: "image",
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z: 1,
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style: {
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// image: require("./../../assets/png/bg.png"),
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width: 300,
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height: 230,
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},
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left: "center",
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top: "13%",
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position: [10, 10],
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},
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],
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},
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// backgroundColor: '#fff',
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series: series,
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};
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return option;
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},
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//获取3d丙图的最高扇区的高度
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getHeight3D(series, height) {
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series.sort((a, b) => {
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return b.pieData.value - a.pieData.value;
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});
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return (height * 25) / series[0].pieData.value;
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},
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// 生成扇形的曲面参数方程，用于 series-surface.parametricEquation
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getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, h) {
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// 计算
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let midRatio = (startRatio + endRatio) / 2;
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let startRadian = startRatio * Math.PI * 2;
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let endRadian = endRatio * Math.PI * 2;
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let midRadian = midRatio * Math.PI * 2;
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// 如果只有一个扇形，则不实现选中效果。
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if (startRatio === 0 && endRatio === 1) {
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isSelected = false;
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}
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// 通过扇形内径/外径的值，换算出辅助参数 k（默认值 1/3）
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k = typeof k !== "undefined" ? k : 1 / 3;
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// 计算选中效果分别在 x 轴、y 轴方向上的位移（未选中，则位移均为 0）
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let offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0;
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let offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0;
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// 计算高亮效果的放大比例（未高亮，则比例为 1）
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let hoverRate = isHovered ? 1.05 : 1;
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// 返回曲面参数方程
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return {
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u: {
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min: -Math.PI,
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max: Math.PI * 3,
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step: Math.PI / 32,
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},
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v: {
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min: 0,
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max: Math.PI * 2,
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step: Math.PI / 20,
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},
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x: function (u, v) {
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if (u < startRadian) {
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return (
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offsetX +
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Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate
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);
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}
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if (u > endRadian) {
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return (
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offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate
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);
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}
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return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate;
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},
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y: function (u, v) {
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if (u < startRadian) {
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return (
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offsetY +
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Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate
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);
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}
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if (u > endRadian) {
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return (
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offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate
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);
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}
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return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate;
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},
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z: function (u, v) {
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if (u < -Math.PI * 0.5) {
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return Math.sin(u);
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}
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if (u > Math.PI * 2.5) {
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return Math.sin(u) * h * 0.1;
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}
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return Math.sin(v) > 0 ? 1 * h * 0.1 : -1;
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},
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};
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},
|
|
fomatFloat(num, n) {
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var f = parseFloat(num);
|
if (isNaN(f)) {
|
return false;
|
}
|
f = Math.round(num * Math.pow(10, n)) / Math.pow(10, n); // n 幂
|
var s = f.toString();
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var rs = s.indexOf(".");
|
//判定如果是整数，增加小数点再补0
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if (rs < 0) {
|
rs = s.length;
|
s += ".";
|
}
|
while (s.length <= rs + n) {
|
s += "0";
|
}
|
return s;
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},
|
|
bindListen(myChart) {
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// 监听鼠标事件，实现饼图选中效果（单选），近似实现高亮（放大）效果。
|
let that = this;
|
let selectedIndex = "";
|
let hoveredIndex = "";
|
// 监听点击事件，实现选中效果（单选）
|
myChart.on("click", function (params) {
|
if (typeof params.seriesIndex == undefined) {
|
return;
|
}
|
// 从 option.series 中读取重新渲染扇形所需的参数，将是否选中取反。
|
let isSelected =
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!that.option.series[params.seriesIndex].pieStatus.selected;
|
let isHovered =
|
that.option.series[params.seriesIndex].pieStatus.hovered;
|
let k = that.option.series[params.seriesIndex].pieStatus.k;
|
let startRatio =
|
that.option.series[params.seriesIndex].pieData.startRatio;
|
let endRatio = that.option.series[params.seriesIndex].pieData.endRatio;
|
// 如果之前选中过其他扇形，将其取消选中（对 option 更新）
|
if (selectedIndex !== "" && selectedIndex !== params.seriesIndex) {
|
that.option.series[selectedIndex].parametricEquation =
|
that.getParametricEquation(
|
that.option.series[selectedIndex].pieData.startRatio,
|
that.option.series[selectedIndex].pieData.endRatio,
|
false,
|
false,
|
k,
|
that.option.series[selectedIndex].pieData.value
|
);
|
that.option.series[selectedIndex].pieStatus.selected = false;
|
}
|
// 对当前点击的扇形，执行选中/取消选中操作（对 option 更新）
|
that.option.series[params.seriesIndex].parametricEquation =
|
that.getParametricEquation(
|
startRatio,
|
endRatio,
|
isSelected,
|
isHovered,
|
k,
|
that.option.series[params.seriesIndex].pieData.value
|
);
|
that.option.series[params.seriesIndex].pieStatus.selected = isSelected;
|
// 如果本次是选中操作，记录上次选中的扇形对应的系列号 seriesIndex
|
isSelected ? (selectedIndex = params.seriesIndex) : null;
|
// 使用更新后的 option，渲染图表
|
myChart.setOption(that.option);
|
});
|
// 监听 mouseover，近似实现高亮（放大）效果
|
myChart.on("mouseover", function (params) {
|
if (typeof params.seriesIndex == undefined) {
|
return;
|
}
|
// 准备重新渲染扇形所需的参数
|
let isSelected;
|
let isHovered;
|
let startRatio;
|
let endRatio;
|
let k;
|
// 如果触发 mouseover 的扇形当前已高亮，则不做操作
|
if (hoveredIndex === params.seriesIndex) {
|
return;
|
// 否则进行高亮及必要的取消高亮操作
|
} else {
|
// 如果当前有高亮的扇形，取消其高亮状态（对 option 更新）
|
if (hoveredIndex !== "") {
|
// 从 option.series 中读取重新渲染扇形所需的参数，将是否高亮设置为 false。
|
isSelected = that.option.series[hoveredIndex].pieStatus.selected;
|
isHovered = false;
|
startRatio = that.option.series[hoveredIndex].pieData.startRatio;
|
endRatio = that.option.series[hoveredIndex].pieData.endRatio;
|
k = that.option.series[hoveredIndex].pieStatus.k;
|
// 对当前点击的扇形，执行取消高亮操作（对 option 更新）
|
that.option.series[hoveredIndex].parametricEquation =
|
that.getParametricEquation(
|
startRatio,
|
endRatio,
|
isSelected,
|
isHovered,
|
k,
|
that.option.series[hoveredIndex].pieData.value
|
);
|
that.option.series[hoveredIndex].pieStatus.hovered = isHovered;
|
// 将此前记录的上次选中的扇形对应的系列号 seriesIndex 清空
|
hoveredIndex = "";
|
}
|
// 如果触发 mouseover 的扇形不是透明圆环，将其高亮（对 option 更新）
|
if (
|
params.seriesName !== "mouseoutSeries" &&
|
params.seriesName !== "pie2d"
|
) {
|
if(params.componentType == "series"){
|
// 从 option.series 中读取重新渲染扇形所需的参数，将是否高亮设置为 true。
|
isSelected =
|
that.option.series[params.seriesIndex].pieStatus.selected;
|
isHovered = true;
|
startRatio =
|
that.option.series[params.seriesIndex].pieData.startRatio;
|
endRatio = that.option.series[params.seriesIndex].pieData.endRatio;
|
k = that.option.series[params.seriesIndex].pieStatus.k;
|
// 对当前点击的扇形，执行高亮操作（对 option 更新）
|
that.option.series[params.seriesIndex].parametricEquation =
|
that.getParametricEquation(
|
startRatio,
|
endRatio,
|
isSelected,
|
isHovered,
|
k,
|
that.option.series[params.seriesIndex].pieData.value + 5
|
);
|
that.option.series[params.seriesIndex].pieStatus.hovered =
|
isHovered;
|
// 记录上次高亮的扇形对应的系列号 seriesIndex
|
hoveredIndex = params.seriesIndex;
|
}
|
}
|
// 使用更新后的 option，渲染图表
|
myChart.setOption(that.option);
|
}
|
});
|
// 修正取消高亮失败的 bug
|
myChart.on("globalout", function () {
|
// 准备重新渲染扇形所需的参数
|
let isSelected;
|
let isHovered;
|
let startRatio;
|
let endRatio;
|
let k;
|
if (hoveredIndex !== "") {
|
// 从 option.series 中读取重新渲染扇形所需的参数，将是否高亮设置为 true。
|
isSelected = that.option.series[hoveredIndex].pieStatus.selected;
|
isHovered = false;
|
k = that.option.series[hoveredIndex].pieStatus.k;
|
startRatio = that.option.series[hoveredIndex].pieData.startRatio;
|
endRatio = that.option.series[hoveredIndex].pieData.endRatio;
|
// 对当前点击的扇形，执行取消高亮操作（对 option 更新）
|
that.option.series[hoveredIndex].parametricEquation =
|
that.getParametricEquation(
|
startRatio,
|
endRatio,
|
isSelected,
|
isHovered,
|
k,
|
that.option.series[hoveredIndex].pieData.value
|
);
|
that.option.series[hoveredIndex].pieStatus.hovered = isHovered;
|
// 将此前记录的上次选中的扇形对应的系列号 seriesIndex 清空
|
hoveredIndex = "";
|
}
|
// 使用更新后的 option，渲染图表
|
myChart.setOption(that.option);
|
});
|
},
|
},
|
};
|
</script>
|
<style>
|
</style>
|
