Vue+Echart实现利用率表盘效果的示例代码
作者:老丹丘
这篇文章主要为大家详细介绍了Vue如何利用Echart实现利用率表盘的效果,文中的示例代码讲解详细,具有一定的借鉴价值,需要的可以参考一下
效果演示
组件
里面对应两个图片资源,panelBackground_red.png 和 panelBackground_green.png,请前往百度网盘进行下载。如果喜欢其他颜色,可以使用.psd来修改导出就行。
链接: https://pan.baidu.com/s/1BmupspRch3aPcqY7l01WYA 提取码: t3ur
在使用组件之前,记得引入echart组件,可以参考echart组件引入
<template> <!-- <div class="titleDiv">占用率</div> --> <div id="customGaugeContainer" ref="panel" style="height: 100%;"></div> </template> <script> import * as echarts from 'echarts' var app = {}; var ROOT_PATH = 'https://echarts.apache.org/examples'; // var _panelImageURL = ROOT_PATH + '/data/asset/img/custom-gauge-panel.png'; var _panelImageURL = require("@/assets/panel/panelBackground_green.png"); var _animationDuration = 1000; var _animationDurationUpdate = 1000; var _animationEasingUpdate = 'quarticInOut'; //这个不改 var _valOnRadianMax = 100; //这个不改 var _pointerInnerRadius = 60; //外轮廓半径 var _outerRadius = 110; //内轮廓半径 var _innerRadius = 100; //里面白色远的半径 var _insidePanelRadius = 100; var _fontSize = 50; var _currentDataIndex = 0; var _shadowColor = '#20A53A'; var _textColor = '#20A53A'; var _shadowBlur = 20; export default { name: 'SmartSchedulingSystemCustomGauge', props: { rate: { type: Number }, timeChange: { type: Number } }, watch: { rate: { handler(newValue, oldValue) { // console.log("刷新表盘数据") // console.log("oldValue:" + oldValue) // console.log("newValue:" + newValue) // console.log("rate:" + this.rate) //刷新表盘数据 this.setOptions(); }, deep: true }, }, data() { return { myChart: undefined, scheduledTask: undefined, }; }, mounted() { this.$nextTick(() => { this.initChart(); window.addEventListener('resize', this.myChart.resize()); // this.setScheduledTask(); }) }, methods: { initChart() { let dom = document.getElementById('customGaugeContainer'); let clientHeight = dom.clientHeight; // console.log("clientHeight:" + clientHeight) _outerRadius = (clientHeight / 2) * 0.9; _innerRadius = (clientHeight / 2) * 0.8; _insidePanelRadius = (clientHeight / 2) * 0.8; _fontSize = (clientHeight / 2) * 0.3; _shadowBlur = (clientHeight / 2) * 0.2; // this.myChart = echarts.init(dom, null, { // renderer: 'canvas', // useDirtyRect: false // }); this.myChart = echarts.init(this.$refs.panel); this.setOptions(); }, setOptions() { if (this.rate > 80) { _shadowColor = '#F33333'; _textColor = '#F33333'; _panelImageURL = require("@/assets/panel/panelBackground_red.png"); } else { _shadowColor = '#20A53A'; _textColor = '#20A53A'; _panelImageURL = require("@/assets/panel/panelBackground_green.png"); } let option = { animationEasing: _animationEasingUpdate, animationDuration: _animationDuration, animationDurationUpdate: _animationDurationUpdate, animationEasingUpdate: _animationEasingUpdate, //数据展示 dataset: { //100可以看成是百分比 source: [[1, this.rate]] }, tooltip: {}, angleAxis: { type: 'value', startAngle: 0, show: false, min: 0, max: _valOnRadianMax }, radiusAxis: { type: 'value', show: false }, polar: {}, series: [ { type: 'custom', coordinateSystem: 'polar', renderItem: renderItem } ] }; if (option && typeof option === 'object') { this.myChart.setOption(option); } }, /** * 设置定时任务 */ setScheduledTask() { this.scheduledTask = setInterval(function () { console.log("rate:" + this.rate) }, 2000); } }, }; function renderItem(params, api) { var valOnRadian = api.value(1); var coords = api.coord([api.value(0), valOnRadian]); var polarEndRadian = coords[3]; var imageStyle = { image: _panelImageURL, x: params.coordSys.cx - _outerRadius, y: params.coordSys.cy - _outerRadius, width: _outerRadius * 2, height: _outerRadius * 2 }; return { type: 'group', children: [ { type: 'image', style: imageStyle, clipPath: { type: 'sector', shape: { cx: params.coordSys.cx, cy: params.coordSys.cy, r: _outerRadius, r0: _innerRadius, startAngle: 0, endAngle: -polarEndRadian, transition: 'endAngle', enterFrom: { endAngle: 0 } } } }, // { // type: 'image', // style: imageStyle, // clipPath: { // type: 'polygon', // shape: { // points: makePionterPoints(params, polarEndRadian) // }, // extra: { // polarEndRadian: polarEndRadian, // transition: 'polarEndRadian', // enterFrom: { polarEndRadian: 0 } // }, // during: function (apiDuring) { // apiDuring.setShape( // 'points', // makePionterPoints(params, apiDuring.getExtra('polarEndRadian')) // ); // } // } // }, //白色中心圆 { type: 'circle', shape: { cx: params.coordSys.cx, cy: params.coordSys.cy, r: _insidePanelRadius }, style: { fill: '#fff', shadowBlur: _shadowBlur, shadowOffsetX: 0, shadowOffsetY: 0, //轮廓阴影颜色 shadowColor: _shadowColor } }, { type: 'text', extra: { valOnRadian: valOnRadian, transition: 'valOnRadian', enterFrom: { valOnRadian: 0 } }, style: { text: makeText(valOnRadian), fontSize: _fontSize, fontWeight: 700, x: params.coordSys.cx, y: params.coordSys.cy, //字体颜色 fill: _textColor, align: 'center', verticalAlign: 'middle', enterFrom: { opacity: 0 } }, during: function (apiDuring) { apiDuring.setStyle( 'text', makeText(apiDuring.getExtra('valOnRadian')) ); } } ] }; } function convertToPolarPoint(renderItemParams, radius, radian) { return [ Math.cos(radian) * radius + renderItemParams.coordSys.cx, -Math.sin(radian) * radius + renderItemParams.coordSys.cy ]; } function makePionterPoints(renderItemParams, polarEndRadian) { return [ convertToPolarPoint(renderItemParams, _outerRadius, polarEndRadian), convertToPolarPoint( renderItemParams, _outerRadius, polarEndRadian + Math.PI * 0.03 ), convertToPolarPoint(renderItemParams, _pointerInnerRadius, polarEndRadian) ]; } function makeText(valOnRadian) { // Validate additive animation calc. if (valOnRadian < -10) { alert('illegal during val: ' + valOnRadian); } return ((valOnRadian / _valOnRadianMax) * 100).toFixed(1) + '%'; } </script> <style lang="scss" scoped> #customGaugeContainer { // height: calc(100% - 20px); height: 100%; } </style>
使用方式
在页面引入组件
使用组件
<customGauge style="height: 150px;" :rate="server.jvm.usage"> </customGauge>
- height设置组件的高度
- rate属性设置利用率
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