<script>
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import ECharts from 'echarts';
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import BaseChart from '@/components/myCharts/BaseChart.vue';
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import 'echarts-gl';
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const colorList0 = ['#afa3f5', '#00d488', '#3feed4', '#3bafff', '#f1bb4c'];
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const colorList1 = [
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'#00acee',
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'#52cdd5',
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'#79d9f1',
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'#a7e7ff',
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'#c8efff'
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];
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export default {
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extends: BaseChart,
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props: {
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alpha: {
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type: Number,
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default: 36,
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},
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themeIdx: {
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type: Number,
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default: 0
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}
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},
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data() {
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return {
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option: {},
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lastData: [],
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}
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},
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methods: {
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setData(data) {
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// let myChart = this.$options.chart;
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// 判断参数是否有变化 不变就不渲染
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if (this.check(data.sData)) {
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// console.log('数据没有变化');
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return false;
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}
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let option = this.getPie3D(data.sData, 0.1);
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this.option = option;
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this.setOption(option);
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// this.bindListen(this.$options.chart);
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},
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check(arr) {
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let lastData = this.lastData.map(v => v);
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this.lastData = arr.map(v => v);
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// console.log(arr, lastData, 'new=========last');
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if (arr.length != lastData.length) {
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return false;
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} else {
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for (let i = 0, j = arr.length; i < j; i++) {
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if (arr[i].name == lastData[i].name && arr[i].value == lastData[i].value) {
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continue;
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} else {
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return false;
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}
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}
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}
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return true;
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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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const colorList = [colorList0, colorList1][this.themeIdx];
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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: 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' ? 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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} else {
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seriesItem.itemStyle = {
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color: colorList[i % colorList.length]
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}
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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(series[i].pieData.startRatio, series[i].pieData.endRatio,
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false, false, k, series[i].pieData.value);
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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, 26);//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: 'vertical',
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left: 10,
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top: 10,
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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: "roundRect",
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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} ${bfs}`;
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}
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},
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tooltip: {
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formatter: params => {
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if (params.seriesName !== 'mouseoutSeries' && params.seriesName !== 'pie2d') {
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let bfb = ((option.series[params.seriesIndex].pieData.endRatio - option.series[params.seriesIndex].pieData.startRatio) *
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100).toFixed(2);
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return `${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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// show: true,
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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: this.alpha, //角度
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beta: 60,
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distance: 260,//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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},
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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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if (!series.length || 0 == series[0].pieData.value) {
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return 1;
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}
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return Math.min(height * 25 / series[0].pieData.value, 240);
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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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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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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;
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endRatio = that.option.series[hoveredIndex].pieData.endRatio;
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k = that.option.series[hoveredIndex].pieStatus.k;
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// 对当前点击的扇形，执行取消高亮操作（对 option 更新）
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that.option.series[hoveredIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio,
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isSelected,
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isHovered, k, that.option.series[hoveredIndex].pieData.value);
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that.option.series[hoveredIndex].pieStatus.hovered = isHovered;
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// 将此前记录的上次选中的扇形对应的系列号 seriesIndex 清空
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hoveredIndex = '';
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}
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// 如果触发 mouseover 的扇形不是透明圆环，将其高亮（对 option 更新）
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if (params.seriesName !== 'mouseoutSeries' && params.seriesName !== 'pie2d') {
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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 true。
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isSelected = that.option.series[params.seriesIndex].pieStatus.selected;
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isHovered = true;
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startRatio = that.option.series[params.seriesIndex].pieData.startRatio;
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endRatio = that.option.series[params.seriesIndex].pieData.endRatio;
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k = that.option.series[params.seriesIndex].pieStatus.k;
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// 对当前点击的扇形，执行高亮操作（对 option 更新）
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that.option.series[params.seriesIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio,
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isSelected, isHovered, k, that.option.series[params.seriesIndex].pieData.value + 5);
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that.option.series[params.seriesIndex].pieStatus.hovered = isHovered;
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// 记录上次高亮的扇形对应的系列号 seriesIndex
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hoveredIndex = params.seriesIndex;
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}
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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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});
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// 修正取消高亮失败的 bug
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myChart.on('globalout', function () {
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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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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 true。
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isSelected = that.option.series[hoveredIndex].pieStatus.selected;
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isHovered = false;
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k = that.option.series[hoveredIndex].pieStatus.k;
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startRatio = that.option.series[hoveredIndex].pieData.startRatio;
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endRatio = that.option.series[hoveredIndex].pieData.endRatio;
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// 对当前点击的扇形，执行取消高亮操作（对 option 更新）
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that.option.series[hoveredIndex].parametricEquation = that.getParametricEquation(startRatio, endRatio,
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isSelected,
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isHovered, k, that.option.series[hoveredIndex].pieData.value);
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that.option.series[hoveredIndex].pieStatus.hovered = isHovered;
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// 将此前记录的上次选中的扇形对应的系列号 seriesIndex 清空
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hoveredIndex = '';
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}
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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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},
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// 清空实例
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clear() {
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this.$options.chart.clear();
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},
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fullScreen() {
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return false;
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},
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},
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mounted() {
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this.setData({
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xLabel: [],
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sData: [],
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});
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// this.bindListen(this.$options.chart);
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}
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}
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</script>
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