echarts写仪表盘，指针到不同区域显示不同颜色 https://my.oschina.net/u/3549294/blog/1586818
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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>空气质量</title> <link rel="stylesheet" href="http://v3.bootcss.com/dist/css/bootstrap.min.css"> <script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script> <script src="http://echarts.baidu.com/dist/echarts.min.js"></script> </head> <body> <!--正文--> <div class="container-fluid"> <div class="title"> <h4 class="text-center">房间名称实时空气质量</h4> </div> <div class="gaugelabel"> <div class="gaugbox pull-left" style="width: 33%;"> <a href="#"> <div class="pull-left" id="pm" style="width: 100%;height: 500px"></div> </a> </div> <div class="gaugbox pull-left" style="width: 22%"> <a href="#"> <div class="pull-left" id="co2" style="width: 100%;height: 500px"></div> </a> </div> <div class="gaugbox pull-left" style="width: 22%"> <a href="#"> <div class="pull-left" id="voc" style="width: 100%;height: 500px"></div> </a> </div> <div class="gaugbox pull-left" style="width: 22%"> <a href="#"> <div class="pull-left" id="jqz" style="width: 100%;height: 500px"></div> </a> </div> </div> </div> </body> <script> $(document).ready(function() { gaugeimg('pm', '室内PM2.5', 0, 500, 300, 'μg/m3'); gaugeimg('co2', '二氧化碳', 350, 5000, 780, 'ppm'); gaugeimg('voc', 'voc', 0.2, 25, 25, 'mg/m3'); gaugeimg('jqz', '甲醛', 0, 0.30, 0.2, 'mg/m3'); /* *id:id; *title:仪表盘名称 *min:最小值 *max:最大值 *val:当前实际值 *unit:单位符号 */ function gaugeimg(id, title, min, max, val, unit) { var myChart = echarts.init(document.getElementById(id)); //初始化 option = { title: { text: title, x: 'center', y: '90%' }, tooltip: { formatter: "{a} <br/>{b} : {c}" + unit }, toolbox: { show: false, feature: { mark: { show: true }, restore: { show: true }, saveAsImage: { show: true } } }, series: [{ center: ['50%', '50%'], number: [0, '50%'], startAngle: 240, //仪表盘起始角度 endAngle: -60, //仪表盘结束角度 //min: min, //max: max, splitNumber: 10, //分割段数 name: title, type: 'gauge', radius: '90%', splitNumber: 10, // 分割段数，默认为5 axisLine: { // 坐标轴线 lineStyle: { // 属性lineStyle控制线条样式 color: [ [0.25, '#ddd'], [1, '#ddd'] ], width: 8 } }, axisTick: { // 坐标轴小标记 splitNumber: 10, // 每份split细分多少段 length: 12, // 属性length控制线长 lineStyle: { // 属性lineStyle控制线条样式 color: 'auto' } }, axisLabel: { // 坐标轴文本标签，详见axis.axisLabel textStyle: { // 其余属性默认使用全局文本样式，详见TEXTSTYLE color: 'auto' } }, splitLine: { // 分隔线 show: true, // 默认显示，属性show控制显示与否 length: 22, // 属性length控制线长 lineStyle: { // 属性lineStyle（详见lineStyle）控制线条样式 color: 'auto' } }, pointer: { //指针粗细 width: 5 }, title: { textStyle: { // 其余属性默认使用全局文本样式，详见TEXTSTYLE fontWeight: 'bolder' }, "show": true, "offsetCenter": [0, "-30%"], "padding": [5, 10], "fontSize": 18, //"color": "auto", }, detail: { formatter: '{value}' + unit, textStyle: { // 其余属性默认使用全局文本样式，详见TEXTSTYLE color: 'auto', fontWeight: 'bolder', "fontSize": 20 } }, data: [{ //value: val, //name: name }] }] }; option.series[0].min = min; option.series[0].max = max; option.series[0].data[0].value = val; option.series[0].axisLine.lineStyle.color[0][0] = (val - min) / (max - min); option.series[0].axisLine.lineStyle.color[0][1] = detectionData(val, id); myChart.setOption(option); } /* *颜色设置， */ function detectionData(str, id) { if (id == 'pm') { //空气颜色设置 var color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#56b7ef' }, { offset: 1, color: '#56b7ef' }]); option.series[0].data[0].name = '优'; if (str >= 51 && str <= 100) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#00ab35' }, { offset: 1, color: '#00ab35' }]); option.series[0].data[0].name = '良'; } if (str >= 101 && str <= 150) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#98c100' }, { offset: 1, color: '#98c100' }]); option.series[0].data[0].name = '轻度污染'; } if (str >= 151 && str <= 200) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#f49c00' }, { offset: 1, color: '#f49c00' }]); option.series[0].data[0].name = '中度污染'; } if (str >= 201 && str <= 300) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#fd2c00' }, { offset: 1, color: '#fd2c00' }]); option.series[0].data[0].name = '重度污染'; } else if (str > 300) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#9d3f7e' }, { offset: 1, color: '#9d3f7e' }]); option.series[0].data[0].name = '严重污染'; } option.series[0].axisLine.lineStyle.width = '11'; //重置仪表盘轴线宽度 option.series[0].axisTick.length = '16'; //重置仪表盘刻度线长度 option.series[0].title.color = color.colorStops[1].color; //字体颜色和轴线颜色一致 option.series[0].title.fontSize = 30; //第一个字体变大 return color; } if (id == 'co2') { //二氧化碳颜色设置 var color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#56b7ef' }, { offset: 1, color: '#56b7ef' }]); option.series[0].data[0].name = '同一般室外环境'; if (str >= 450 && str <= 1000) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#00ab35' }, { offset: 1, color: '#00ab35' }]); option.series[0].data[0].name = '空气清新'; } if (str >= 1001 && str <= 2000) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#f49c00' }, { offset: 1, color: '#f49c00' }]); option.series[0].data[0].name = '空气混浊'; } if (str >= 2001 && str <= 5000) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#fd2c00' }, { offset: 1, color: '#fd2c00' }]); option.series[0].data[0].name = '头痛、轻度恶心'; } else if (str > 5000) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#9f3979' }, { offset: 1, color: '#9f3979' }]); option.series[0].data[0].name = '严重缺氧'; } option.series[0].title.color = color.colorStops[1].color; //字体颜色和轴线颜色一致 return color; } if (id == 'voc') { //voc颜色 var color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#56b7ef' }, { offset: 1, color: '#56b7ef' }]); option.series[0].data[0].name = '无效应水平'; if (str >= 0.3 && str < 3) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#f49c00' }, { offset: 1, color: '#f49c00' }]); option.series[0].data[0].name = '感到不舒服'; } else if (str >= 25) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#9f3979' }, { offset: 1, color: '#9f3979' }]); option.series[0].data[0].name = '出现毒性'; } option.series[0].title.color = color.colorStops[1].color; //字体颜色和轴线颜色一致 return color; } if (id == 'jqz') { //甲醛颜色设置 var color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#56b7ef' }, { offset: 1, color: '#56b7ef' }]); option.series[0].data[0].name = '正常'; if (str >= 0.10 && str <= 0.20) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#00ab35' }, { offset: 1, color: '#00ab35' }]); option.series[0].data[0].name = '轻度污染'; } if (str >= 0.20 && str <= 0.30) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#fd2c00' }, { offset: 1, color: '#fd2c00' }]); option.series[0].data[0].name = '中度污染'; } else if (str > 0.30) { color = new echarts.graphic.LinearGradient(0, 0, 1, 1, [{ offset: 0, color: '#9f3979' }, { offset: 1, color: '#9f3979' }]); option.series[0].data[0].name = '重度污染'; } option.series[0].title.color = color.colorStops[1].color; //字体颜色和轴线颜色一致 return color; } } }) </script> </html> |
1.要想使仪表盘颜色全部一样，设置
option.series[0].axisLine.lineStyle.color[0][0] =100;
