- A+
所属分类:Web前端
首先确保在项目中引入了echarts和echarts-gl
"echarts": "^4.9.0",
"echarts-gl": "^1.1.2"
剩下的配置好optionData的数据,交给代码
<template> <div class="water-eval-container"> <div class="cityGreenLand-charts" id="cityGreenLand-charts"> </div> </div> </template> <script> import echarts from 'echarts' import 'echarts-gl'; export default { name: "cityGreenLand", components: {}, data() { return { optionData: [{ name: '林地面积统计', value: 10000, itemStyle: { color: '#22c4ff', } }, { name: '草地面积统计', value: 12116, itemStyle: { color: '#aaff00' } }, { name: '耕地地面积统计', value: 16616, itemStyle: { color: '#ffaaff' } }], } }, mounted() { this.$nextTick(function() { this.init(); }); }, methods: { init() { //构建3d饼状图 let myChart = echarts.init(document.getElementById('cityGreenLand-charts')); // 传入数据生成 option this.option = this.getPie3D(this.optionData, 0.8); myChart.setOption(this.option); //是否需要label指引线,如果要就添加一个透明的2d饼状图并调整角度使得labelLine和3d的饼状图对齐,并再次setOption this.option.series.push({ name: 'pie2d', type: 'pie', labelLine:{ length:10, length2:10 }, startAngle: -20 , //起始角度,支持范围[0, 360]。 clockwise: false,//饼图的扇区是否是顺时针排布。上述这两项配置主要是为了对齐3d的样式 radius: ['20%', '50%'], center: ['50%', '50%'], data: this.optionData, itemStyle:{ opacity:0 } }); myChart.setOption(this.option); this.bindListen(myChart); }, getPie3D(pieData, internalDiameterRatio) { //internalDiameterRatio:透明的空心占比 let that = this; let series = []; let sumValue = 0; let startValue = 0; let endValue = 0; let legendData = []; let legendBfb = []; let k = 1 - internalDiameterRatio; pieData.sort((a, b) => { return (b.value - a.value); }); // 为每一个饼图数据,生成一个 series-surface 配置 for (let i = 0; i < pieData.length; i++) { sumValue += pieData[i].value; let seriesItem = { name: typeof pieData[i].name === 'undefined' ? `series${i}` : pieData[i].name, type: 'surface', parametric: true, wireframe: { show: false }, pieData: pieData[i], pieStatus: { selected: false, hovered: false, k: k }, center: ['10%', '50%'] }; if (typeof pieData[i].itemStyle != 'undefined') { let itemStyle = {}; typeof pieData[i].itemStyle.color != 'undefined' ? itemStyle.color = pieData[i].itemStyle.color : null; typeof pieData[i].itemStyle.opacity != 'undefined' ? itemStyle.opacity = pieData[i].itemStyle.opacity : null; seriesItem.itemStyle = itemStyle; } series.push(seriesItem); } // 使用上一次遍历时,计算出的数据和 sumValue,调用 getParametricEquation 函数, // 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。 legendData = []; legendBfb = []; for (let i = 0; i < series.length; i++) { endValue = startValue + series[i].pieData.value; series[i].pieData.startRatio = startValue / sumValue; series[i].pieData.endRatio = endValue / sumValue; series[i].parametricEquation = this.getParametricEquation(series[i].pieData.startRatio, series[i].pieData.endRatio, false, false, k, series[i].pieData.value); startValue = endValue; let bfb = that.fomatFloat(series[i].pieData.value / sumValue, 4); legendData.push({ name: series[i].name, value: bfb }); legendBfb.push({ name: series[i].name, value: bfb }); } let boxHeight = this.getHeight3D(series, 26);//通过传参设定3d饼/环的高度,26代表26px // 准备待返回的配置项,把准备好的 legendData、series 传入。 let option = { legend: { data: legendData, orient: 'horizontal', left: 10, top: 10, itemGap: 10, textStyle: { color: '#A1E2FF', }, show: true, icon: "circle", formatter: function(param) { let item = legendBfb.filter(item => item.name == param)[0]; let bfs = that.fomatFloat(item.value * 100, 2) + "%"; return `${item.name} ${bfs}`; } }, labelLine: { show: true, lineStyle: { color: '#7BC0CB' } }, label: { show: true, position: 'outside', rich: { b: { color: '#7BC0CB', fontSize: 12, lineHeight: 20 }, c: { fontSize: 16, }, }, formatter: '{b|{b} n}{c|{c}}{b| 亩}', }, tooltip: { formatter: params => { if (params.seriesName !== 'mouseoutSeries' && params.seriesName !== 'pie2d') { let bfb = ((option.series[params.seriesIndex].pieData.endRatio - option.series[params.seriesIndex].pieData.startRatio) * 100).toFixed(2); return `${params.seriesName}<br/>` + `<span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:${params.color};"></span>` + `${ bfb }%`; } } }, xAxis3D: { min: -1, max: 1 }, yAxis3D: { min: -1, max: 1 }, zAxis3D: { min: -1, max: 1 }, grid3D: { show: false, boxHeight: boxHeight, //圆环的高度 viewControl: { //3d效果可以放大、旋转等,请自己去查看官方配置 alpha: 40, //角度 distance: 300,//调整视角到主体的距离,类似调整zoom rotateSensitivity: 0, //设置为0无法旋转 zoomSensitivity: 0, //设置为0无法缩放 panSensitivity: 0, //设置为0无法平移 autoRotate: false //自动旋转 } }, series: series }; return option; }, //获取3d丙图的最高扇区的高度 getHeight3D(series, height) { series.sort((a, b) => { return (b.pieData.value - a.pieData.value); }) return height * 25 / series[0].pieData.value; }, // 生成扇形的曲面参数方程,用于 series-surface.parametricEquation getParametricEquation(startRatio, endRatio, isSelected, isHovered, k, h) { // 计算 let midRatio = (startRatio + endRatio) / 2; let startRadian = startRatio * Math.PI * 2; let endRadian = endRatio * Math.PI * 2; let midRadian = midRatio * Math.PI * 2; // 如果只有一个扇形,则不实现选中效果。 if (startRatio === 0 && endRatio === 1) { isSelected = false; } // 通过扇形内径/外径的值,换算出辅助参数 k(默认值 1/3) k = typeof k !== 'undefined' ? k : 1 / 3; // 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) let offsetX = isSelected ? Math.cos(midRadian) * 0.1 : 0; let offsetY = isSelected ? Math.sin(midRadian) * 0.1 : 0; // 计算高亮效果的放大比例(未高亮,则比例为 1) let hoverRate = isHovered ? 1.05 : 1; // 返回曲面参数方程 return { u: { min: -Math.PI, max: Math.PI * 3, step: Math.PI / 32 }, v: { min: 0, max: Math.PI * 2, step: Math.PI / 20 }, x: function(u, v) { if (u < startRadian) { return offsetX + Math.cos(startRadian) * (1 + Math.cos(v) * k) * hoverRate; } if (u > endRadian) { return offsetX + Math.cos(endRadian) * (1 + Math.cos(v) * k) * hoverRate; } return offsetX + Math.cos(u) * (1 + Math.cos(v) * k) * hoverRate; }, y: function(u, v) { if (u < startRadian) { return offsetY + Math.sin(startRadian) * (1 + Math.cos(v) * k) * hoverRate; } if (u > endRadian) { return offsetY + Math.sin(endRadian) * (1 + Math.cos(v) * k) * hoverRate; } return offsetY + Math.sin(u) * (1 + Math.cos(v) * k) * hoverRate; }, z: function(u, v) { if (u < -Math.PI * 0.5) { return Math.sin(u); } if (u > Math.PI * 2.5) { return Math.sin(u) * h * .1; } return Math.sin(v) > 0 ? 1 * h * .1 : -1; } }; }, fomatFloat(num, n) { 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(); var rs = s.indexOf('.'); //判定如果是整数,增加小数点再补0 if (rs < 0) { rs = s.length; s += '.'; } while (s.length <= rs + n) { s += '0'; } return s; }, bindListen(myChart) { // 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) { // 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 = !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) { // 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') { // 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 lang="less"> .water-eval-container { width: 100%; height: 100%; } .cityGreenLand-charts { height: 200px; width: 400px; } </style>
以上代码复制拿走就能直接用,还不赶快试试