发布时间:2022-11-19 文章分类:WEB开发 投稿人:樱花 字号: 默认 | | 超大 打印

1.需求分析

本次需求是绘制多个折线图描述服务器状态信息。因此都是折线图,样式类似,因此考虑vue-echarts 进行一个配置option多个图表。

2.结构

3.代码

<template>
<v-chart class="chart" :option="option" />
<el-button class="myBtn" type="primary" @click="randomData"
>随机数据</el-button
>
</template>
<script>
// 导入相关组件
import { use } from "echarts/core";
import { CanvasRenderer } from "echarts/renderers";
import { LineChart } from "echarts/charts";
import {
TitleComponent,
TooltipComponent,
LegendComponent,
GridComponent,
} from "echarts/components";
import VChart, { THEME_KEY } from "vue-echarts";
import { ref, defineComponent } from "vue";
import { reactive } from "vue";
import { ElButton } from "element-plus";
use([
GridComponent,
CanvasRenderer,
LineChart,
TitleComponent,
TooltipComponent,
LegendComponent,
]);
//从后端取出数据
// import { getData } from "../utils/getChart";
// var obj = await getData();
// //console.log(obj);
// let n = obj.keys.length;
// var ans = Array(n); //作于 series.data
// for (var i = 0; i < n; i++) {
//   ans[i] = new Array(2);
//   ans[i] = [obj.keys[i], obj.vals[i]];
// }
var obj = {
keys: ["10:09:03", "10:09:06", "10:09:09", "10:09:12", "10:09:15"],
vals: [39.12, 23.76, 22.79, 30.57, 31.84],
};
let n = 5;
var ans = Array(n);
for (var i = 0; i < n; i++) {
ans[i] = new Array(2);
ans[i] = [obj.keys[i], obj.vals[i]];
}
export default defineComponent({
name: "ChartInfo",
components: {
//使用到的图表组件
ElButton,
VChart,
},
provide: {
[THEME_KEY]: "white", //设置主题
},
setup() {
//启动函数
//动态生成数据ans,双向绑定
const myData = reactive(ans);
//随机生成数据
function randomData() {
let mx = 30.0;
let mn = 1.0;
for (var i = 0; i < n; i++) {
myData[i][1] = Math.random() * (mx - mn) + mn;
}
//console.log("random:", myData);
}
//配置option
const option = ref({
//由grid控制各个图表,x,y为与左上角顶点的距离,控制各个图表的位置及大小
grid: [
{ left: "10%", top: "6%", width: "80%", height: "20%" },
{ left: "10%", top: "41%", width: "80%", height: "20%" },
{ left: "10%", y: "76%", width: "80%", height: "20%" },
],
title: [
{ text: "最近5个时刻的cpu使用率" },
{ text: "最近5个时刻的mem使用率", top: "35%" },
{ text: "最近5个时刻的load使用率", top: "70%" },
],
// tooltip: {
//   //提示框配置
//   trigger: "axis",
//   formatter: "{a} <br/>{b} : {c}",
// },
// legend: {
//   //图例组件
//   orient: "vertical",
//   left: "left",
// },
xAxis: [
{
gridIndex: 0,
data: obj.keys,
},
{
gridIndex: 1,
data: obj.keys,
},
{
gridIndex: 2,
data: obj.keys,
},
],
// xAxis: {
//   type: "category",
//   data: obj.keys, //keys是x轴
// },
yAxis: [
//minInterval控制最小间隔,不设置的话会有小数,同样由gridIndex绑定各个图表
{ gridIndex: 0, minInterval: 1 },
{ gridIndex: 1, minInterval: 1 },
{ gridIndex: 2, minInterval: 1 },
],
series: [
//系列选择pie,进行相关数据配置
{
xAxisIndex: 0,
yAxisIndex: 0,
name: "cpu使用率",
type: "line",
radius: "55%",
center: ["50%", "60%"],
data: myData,
emphasis: {
itemStyle: {
shadowBlur: 10,
shadowOffsetX: 0,
shadowColor: "rgba(0, 0, 0, 0.5)",
},
},
},
{
xAxisIndex: 1,
yAxisIndex: 1,
name: "mem使用率",
type: "line",
radius: "55%",
center: ["50%", "60%"],
data: myData,
emphasis: {
itemStyle: {
shadowBlur: 10,
shadowOffsetX: 0,
shadowColor: "rgba(0, 0, 0, 0.5)",
},
},
},
{
xAxisIndex: 2,
yAxisIndex: 2,
name: "load使用率",
type: "line",
radius: "55%",
center: ["50%", "60%"],
data: myData,
emphasis: {
itemStyle: {
shadowBlur: 10,
shadowOffsetX: 0,
shadowColor: "rgba(0, 0, 0, 0.5)",
},
},
},
],
});
return { option, randomData };
},
});
</script>
<style scoped>
.chart {
/* 100vh 表示高度为屏幕可见的100% */
height: 600px;
margin-top: 30px;
}
.myBtn {
margin-top: 10px;
}
</style>

4.结果

Vueecharts封装组件需求分析与实现

原生echarts

上文是基于vue-echarts 依赖的,在使用一段时间后,发现该模块对于异步请求数据不是很友好qwq,所以我换回了原生的echarts。

思路与前面完全一样,只是模块换成了原生的echarts。

1.代码

<template>
<div id="chart"></div>
<!-- <v-chart class="chart" :option="option" /> -->
<el-button class="myBtn" type="primary" @click="randomData"
>随机数据</el-button
>
</template>
<script>
import { ref, defineComponent, onMounted } from "vue";
import { reactive } from "vue";
import { ElButton } from "element-plus";
import { getData } from "../utils/getChart";
import * as echarts from "echarts";
export default defineComponent({
name: "ChartInfo",
props: ["id"],
components: {
//使用到的图表组件
ElButton,
},
setup(props) {
//props 为子组件介绍父组件的参数,这里是路由props的参数
//启动函数
let obj = reactive({
cpu: [],
mem: [],
});
let ans_1 = reactive([]);
let ans_2 = reactive([]);
let option = reactive({});
function myformatter(value, index) {
if (value) {
let date = new Date(value * 1000); // 时间戳为秒:10位数
//let date = new Date(value)    // 时间戳为毫秒:13位数
let year = date.getFullYear();
let month =
date.getMonth() + 1 < 10
? `0${date.getMonth() + 1}`
: date.getMonth() + 1;
let day = date.getDate() < 10 ? `0${date.getDate()}` : date.getDate();
let hour =
date.getHours() < 10 ? `0${date.getHours()}` : date.getHours();
let minute =
date.getMinutes() < 10 ? `0${date.getMinutes()}` : date.getMinutes();
let second =
date.getSeconds() < 10 ? `0${date.getSeconds()}` : date.getSeconds();
return `${hour}:${minute}:${second}`;
//return `${year}-${month}-${day} ${hour}:${minute}:${second}`;
} else {
return "";
}
}
onMounted(async () => {
let obj = await getData(props.id).catch((err) => {
console.log(err);
});
console.log("res", obj);
let x_arr = new Array(3);
let res_arr = new Array(3);
let n0 = obj.cpu.length;
for (var i = 0; i < n0; i++) obj.cpu[i].key = myformatter(obj.cpu[i].key);
x_arr[0] = new Array(n0);
res_arr[0] = new Array(n0);
for (var i = 0; i < n0; i++) {
x_arr[0][i] = obj.cpu[i].key;
res_arr[0][i] = [obj.cpu[i].key, obj.cpu[i].val];
}
console.log(res_arr[0]);
var n1 = obj.mem.length;
for (var i = 0; i < n1; i++) obj.mem[i].key = myformatter(obj.mem[i].key);
x_arr[1] = new Array(n1);
res_arr[1] = new Array(n1);
for (var i = 0; i < n1; i++) {
x_arr[1][i] = obj.mem[i].key;
res_arr[1][i] = [obj.mem[i].key, obj.mem[i].val];
}
var n2 = obj.mem.length;
x_arr[2] = new Array(n2);
res_arr[2] = new Array(n2);
for (var i = 0; i < n2; i++) {
x_arr[2][i] = obj.mem[i].key;
res_arr[2][i] = [obj.mem[i].key, obj.mem[i].val];
}
ans_1.push(...x_arr);
ans_2.push(...res_arr);
var myChart = echarts.init(document.getElementById("chart"));
option = reactive({
//由grid控制各个图表,x,y为与左上角顶点的距离,控制各个图表的位置及大小
grid: [
{ left: "10%", top: "6%", width: "80%", height: "20%" },
{ left: "10%", top: "41%", width: "80%", height: "20%" },
{ left: "10%", y: "76%", width: "80%", height: "20%" },
],
title: [
{ text: "最近5个时刻的cpu使用率" },
{ text: "最近5个时刻的mem使用率", top: "35%" },
{ text: "最近5个时刻的load使用率", top: "70%" },
],
// tooltip: {
//   //提示框配置
//   trigger: "axis",
//   formatter: "{a} <br/>{b} : {c}",
// },
// legend: {
//   //图例组件
//   orient: "vertical",
//   left: "left",
// },
xAxis: [
{
gridIndex: 0,
data: ans_1[0],
},
{
gridIndex: 1,
data: ans_1[1],
// axisLabel: {
//   formatter: myformatter,
// },
},
{
gridIndex: 2,
data: ans_1[2],
// axisLabel: {
//   formatter: myformatter,
// },
},
],
// xAxis: {
//   type: "category",
//   data: obj.keys, //keys是x轴
// },
yAxis: [
//minInterval控制最小间隔,不设置的话会有小数,同样由gridIndex绑定各个图表
{ gridIndex: 0, minInterval: 1 },
{ gridIndex: 1, minInterval: 1 },
{ gridIndex: 2, minInterval: 1 },
],
series: [
//系列选择pie,进行相关数据配置
{
xAxisIndex: 0,
yAxisIndex: 0,
name: "cpu使用率",
type: "line",
radius: "55%",
center: ["50%", "60%"],
data: ans_2[0],
emphasis: {
itemStyle: {
shadowBlur: 10,
shadowOffsetX: 0,
shadowColor: "rgba(0, 0, 0, 0.5)",
},
},
},
{
xAxisIndex: 1,
yAxisIndex: 1,
name: "mem使用率",
type: "line",
radius: "55%",
center: ["50%", "60%"],
data: ans_2[1],
emphasis: {
itemStyle: {
shadowBlur: 10,
shadowOffsetX: 0,
shadowColor: "rgba(0, 0, 0, 0.5)",
},
},
},
{
xAxisIndex: 2,
yAxisIndex: 2,
name: "load使用率",
type: "line",
radius: "55%",
center: ["50%", "60%"],
data: ans_2[2],
emphasis: {
itemStyle: {
shadowBlur: 10,
shadowOffsetX: 0,
shadowColor: "rgba(0, 0, 0, 0.5)",
},
},
},
],
});
myChart.setOption(option);
});
//随机生成数据
function randomData() {
// for (var i = 0; i < 3; i++) {
//   option.series[i].data = ans_2[i];
//   option.xAxis[i].data = ans_1[i];
// }
console.log("random test");
}
//配置option
// let option = reactive({
//   //由grid控制各个图表,x,y为与左上角顶点的距离,控制各个图表的位置及大小
//   grid: [
//     { left: "10%", top: "6%", width: "80%", height: "20%" },
//     { left: "10%", top: "41%", width: "80%", height: "20%" },
//     { left: "10%", y: "76%", width: "80%", height: "20%" },
//   ],
//   title: [
//     { text: "最近5个时刻的cpu使用率" },
//     { text: "最近5个时刻的mem使用率", top: "35%" },
//     { text: "最近5个时刻的load使用率", top: "70%" },
//   ],
//   // tooltip: {
//   //   //提示框配置
//   //   trigger: "axis",
//   //   formatter: "{a} <br/>{b} : {c}",
//   // },
//   // legend: {
//   //   //图例组件
//   //   orient: "vertical",
//   //   left: "left",
//   // },
//   xAxis: [
//     {
//       gridIndex: 0,
//       data: ans_1[0],
//     },
//     {
//       gridIndex: 1,
//       data: ans_1[1],
//     },
//     {
//       gridIndex: 2,
//       data: ans_1[2],
//     },
//   ],
//   // xAxis: {
//   //   type: "category",
//   //   data: obj.keys, //keys是x轴
//   // },
//   yAxis: [
//     //minInterval控制最小间隔,不设置的话会有小数,同样由gridIndex绑定各个图表
//     { gridIndex: 0, minInterval: 1 },
//     { gridIndex: 1, minInterval: 1 },
//     { gridIndex: 2, minInterval: 1 },
//   ],
//   series: [
//     //系列选择pie,进行相关数据配置
//     {
//       xAxisIndex: 0,
//       yAxisIndex: 0,
//       name: "cpu使用率",
//       type: "line",
//       radius: "55%",
//       center: ["50%", "60%"],
//       data: ans_2[0],
//       emphasis: {
//         itemStyle: {
//           shadowBlur: 10,
//           shadowOffsetX: 0,
//           shadowColor: "rgba(0, 0, 0, 0.5)",
//         },
//       },
//     },
//     {
//       xAxisIndex: 1,
//       yAxisIndex: 1,
//       name: "mem使用率",
//       type: "line",
//       radius: "55%",
//       center: ["50%", "60%"],
//       data: ans_2[1],
//       emphasis: {
//         itemStyle: {
//           shadowBlur: 10,
//           shadowOffsetX: 0,
//           shadowColor: "rgba(0, 0, 0, 0.5)",
//         },
//       },
//     },
//     {
//       xAxisIndex: 2,
//       yAxisIndex: 2,
//       name: "load使用率",
//       type: "line",
//       radius: "55%",
//       center: ["50%", "60%"],
//       data: ans_2[2],
//       emphasis: {
//         itemStyle: {
//           shadowBlur: 10,
//           shadowOffsetX: 0,
//           shadowColor: "rgba(0, 0, 0, 0.5)",
//         },
//       },
//     },
//   ],
// });
//console.log("dsda", obj);
//动态生成数据ans,双向绑定
//console.log(option);
//console("tep", tep);
return { ans_1, ans_2, randomData };
},
});
</script>
<style scoped>
#chart {
/* 100vh 表示高度为屏幕可见的100% */
height: 600px;
margin-top: 30px;
}
.myBtn {
margin-top: 10px;
}
</style>

2.区别

使用原生的echarts就可以在onMounted钩子函数中执行异步请求,然后得到数据,然后通过原生dom操作获取图表元素。然后配置option。

var myChart = echarts.init(document.getElementById("chart"));
option = reactive({....})
myChart.setOption(option);

vue-echarts封装后的option配置得先获得数据就很蠢,在异步请求里获得数据后,往下操作数据可能是空得,这样导出setup函数导出option就可能有问题。

3.结果

Vueecharts封装组件需求分析与实现

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