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+<template>
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+ <div class="water-eval-container">
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+ <div class="cityGreenLand-charts" id="cityGreenLand-charts">
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+ </div>
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+ </div>
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+</template>
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+
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+<script>
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+ import echarts from 'echarts'
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+ import 'echarts-gl';
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+ export default {
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+ name: "cityGreenLand",
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+ components: {},
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+ data() {
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+ return {
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+ optionData: [{
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+ name: '公职人员数',
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+ value: 10000,
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+ itemStyle: {
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+ //color: '#01D2AA',
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+ color:'rgba(1,210,170,0.8)'
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+ }
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+ }, {
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+ name: '自主就业',
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+ value: 12116,
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+ itemStyle: {
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+ //color: '#0F8BF6'
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+ color:'rgba(15,139,246,0.8)'
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+ }
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+ },
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+ {
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+ name: '企业员工',
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+ value: 10106,
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+ itemStyle: {
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+ // color: '#FBB135'
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+ color:'rgba( 214,215,1,0.8)'
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+ }
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+ },
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+ {
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+ name: '无业',
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+ value: 1616,
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+ itemStyle: {
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+ // color: '#D17356'
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+ color:'rgba( 255,174,45,0.8)'
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+ }
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+ },
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+ {
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+ name: '退休',
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+ value: 6616,
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+ itemStyle: {
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+ // color: '#D17356'
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+ color:'rgba( 217,111,87,0.8)'
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+ }
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+ }],
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+ }
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+ },
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+ mounted() {
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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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+ methods: {
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+ init() {
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+ //构建3d饼状图
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+ let myChart = echarts.init(document.getElementById('cityGreenLand-charts'));
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+ // 传入数据生成 option
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+ this.option = this.getPie3D(this.optionData, 0.8);
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+ myChart.setOption(this.option);
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+ // //是否需要label指引线,如果要就添加一个透明的2d饼状图并调整角度使得labelLine和3d的饼状图对齐,并再次setOption
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+ // this.option.series.push({
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+ // name: 'pie2d',
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+ // type: 'pie',
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+ // labelLine:{
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+ // length:10,
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+ // length2:10
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+ // },
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+ // startAngle: -20 , //起始角度,支持范围[0, 360]。
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+ // clockwise: false,//饼图的扇区是否是顺时针排布。上述这两项配置主要是为了对齐3d的样式
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+ // radius: ['20%', '50%'],
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+ // center: ['50%', '50%'],
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+ // data: this.optionData,
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+ // itemStyle:{
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+ // opacity:0
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+ // }
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+ // });
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+ // myChart.setOption(this.option);
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+ // this.bindListen(myChart);
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+ },
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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: typeof pieData[i].name === 'undefined' ? `series${i}` : 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: true,
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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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+
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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' ? itemStyle.color = pieData[i].itemStyle.color : null;
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+ typeof pieData[i].itemStyle.opacity != 'undefined' ? itemStyle.opacity = pieData[i].itemStyle.opacity : 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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+
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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(series[i].pieData.startRatio, series[i].pieData.endRatio,
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+ // false, false, k, series[i].pieData.value);
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+ series[i].parametricEquation = this.getParametricEquation(series[i].pieData.startRatio, series[i].pieData.endRatio,
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+ false, false, k, 8000);
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+ startValue = endValue;
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+ let bfb = that.fomatFloat(series[i].pieData.value / sumValue, 4);
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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: bfb
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+ });
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+ }
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+ let boxHeight = this.getHeight3D(series, 20);//通过传参设定3d饼/环的高度,26代表26px
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+
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+ //let boxHeight =0.03;
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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: 230,
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+ bottom: 100,
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+ itemGap: 10,
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+ textStyle: {
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+ color: '#A1E2FF',
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+ },
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+ show: true,
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+ icon: "circle",
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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 = that.fomatFloat(item.value * 100, 2) + "%";
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+ // return `${item.name} ${bfs}`;
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+ // }
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+ },
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+ labelLine: {
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+ show: true,
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+ lineStyle: {
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+ color: '#7BC0CB'
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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| 亩}',
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+
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+ },
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+ tooltip: {
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+ formatter: params => {
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+ if (params.seriesName !== 'mouseoutSeries' && params.seriesName !== 'pie2d') {
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+ let bfb = ((option.series[params.seriesIndex].pieData.endRatio - option.series[params.seriesIndex].pieData.startRatio) *
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+ 100).toFixed(2);
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+ return `${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 }%`;
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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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+ boxHeight: boxHeight, //圆环的高度
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+ viewControl: { //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: 27, //角度
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+ distance: 300,//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: true //自动旋转
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+ }
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+ },
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+ series: series
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+ };
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+ return option;
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+ },
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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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+
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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 offsetX + Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
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+ }
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+ if (u > endRadian) {
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+ return offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
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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 offsetY + Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate;
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+ }
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+ if (u > endRadian) {
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+ return offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate;
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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 * .1;
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+ }
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+ return Math.sin(v) > 0 ? 1 * h * .1 : -1;
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+ }
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+ };
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+ },
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+
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+ fomatFloat(num, n) {
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+ var f = parseFloat(num);
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+ if (isNaN(f)) {
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+ return false;
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+ }
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+ f = Math.round(num * Math.pow(10, n)) / Math.pow(10, n); // n 幂
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+ var s = f.toString();
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+ var rs = s.indexOf('.');
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+ //判定如果是整数,增加小数点再补0
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+ if (rs < 0) {
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+ rs = s.length;
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+ s += '.';
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+ }
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+ while (s.length <= rs + n) {
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+ s += '0';
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+ }
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+ return s;
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+ },
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+
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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。
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+ let that = this;
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+ let selectedIndex = '';
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+ let hoveredIndex = '';
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+ // 监听点击事件,实现选中效果(单选)
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+ myChart.on('click', function(params) {
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+ // 从 option.series 中读取重新渲染扇形所需的参数,将是否选中取反。
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+ let isSelected = !that.option.series[params.seriesIndex].pieStatus.selected;
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+ let isHovered = that.option.series[params.seriesIndex].pieStatus.hovered;
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+ let k = that.option.series[params.seriesIndex].pieStatus.k;
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+ let startRatio = that.option.series[params.seriesIndex].pieData.startRatio;
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+ let endRatio = that.option.series[params.seriesIndex].pieData.endRatio;
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+ // 如果之前选中过其他扇形,将其取消选中(对 option 更新)
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+ if (selectedIndex !== '' && selectedIndex !== params.seriesIndex) {
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+ that.option.series[selectedIndex].parametricEquation = that.getParametricEquation(that.option.series[
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+ selectedIndex].pieData
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+ .startRatio, that.option.series[selectedIndex].pieData.endRatio, false, false, k, that.option.series[
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+ selectedIndex].pieData
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+ .value);
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+ that.option.series[selectedIndex].pieStatus.selected = false;
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+ }
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+ // 对当前点击的扇形,执行选中/取消选中操作(对 option 更新)
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+ that.option.series[params.seriesIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio,
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+ isSelected,
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+ isHovered, k, that.option.series[params.seriesIndex].pieData.value);
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+ that.option.series[params.seriesIndex].pieStatus.selected = isSelected;
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+ // 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
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+ isSelected ? selectedIndex = params.seriesIndex : null;
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+ // 使用更新后的 option,渲染图表
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+ myChart.setOption(that.option);
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+ });
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+ // 监听 mouseover,近似实现高亮(放大)效果
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+ myChart.on('mouseover', function(params) {
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+ // 准备重新渲染扇形所需的参数
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+ let isSelected;
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+ let isHovered;
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+ let startRatio;
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+ let endRatio;
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+ let k;
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+ // 如果触发 mouseover 的扇形当前已高亮,则不做操作
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+ if (hoveredIndex === params.seriesIndex) {
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+ return;
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+ // 否则进行高亮及必要的取消高亮操作
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+ } else {
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+ // 如果当前有高亮的扇形,取消其高亮状态(对 option 更新)
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+ if (hoveredIndex !== '') {
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+ // 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。
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+ isSelected = that.option.series[hoveredIndex].pieStatus.selected;
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+ isHovered = false;
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+ 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') {
|
|
|
+ // 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 scoped>
|
|
|
+ .water-eval-container {
|
|
|
+ position: absolute;
|
|
|
+ width: 100%;
|
|
|
+ height: 100%;
|
|
|
+ top:-80%;
|
|
|
+ left:-26%
|
|
|
+ }
|
|
|
+ .cityGreenLand-charts {
|
|
|
+ height: 400px;
|
|
|
+ width: 800px;
|
|
|
+ }
|
|
|
+</style>
|