Vue纯JS使用canvas实现统计图
实现展示https://i-blog.csdnimg.cn/direct/90b7b84d36c64fb2a11f5cedaa2cd754.png
https://i-blog.csdnimg.cn/direct/eadf23cef2c24436a5dd81e6c1539fd0.png
https://i-blog.csdnimg.cn/direct/8ce696590283472383ee2cd020fc0e17.png
数据结构
sleepData 睡眠数据统计图
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sleepData 饼形统计图
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originalData 三线统计图
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样式实现
注意：下拉框的使用的是Element UI的下拉框组件
<template>
<div>
<div style="min-height: 100vh;background-color: #eaf2ff;overflow: hidden;">
<div class="phy-item" style="margin-top: 25px">
<div>
<div style="margin-left: -895px;margin-top: 20px">
<img width="475px" height="36px" src="图片路径./upload/67c7ff09799b1.png" />
</div>
<div class="top-right-div">
<el-select v-model="selectValue" placeholder="请选择" @change="handlePathChange" v-loading.fullscreen.lock="fullscreenLoading">
<el-option
v-for="item in selectListData"
:key="item.value"
:label="item.label"
:value="item.value">
</el-option>
</el-select>
</div>
</div>
<div style="display: flex;margin-top: 70px;height: 500px;">
<div class="svg_class">
<!-- 显示饼图 -->
<svg :width="width" :height="height" :viewBox="`0 0 ${width} ${height}`" style="overflow: visible" @mouseleave="resetHighlight"><!-- 绘制饼图的每个扇形 -->
<path v-for="(slice, index) in slices" :key="index" :d="slice.path" :fill="slice.color" @mouseover="highlightSlice(index)"
:style="{transform: slice.highlighted ? 'scale(1.1)' : 'scale(1)',transformOrigin: 'center',transition: 'transform 0.2s ease'}"/>
<!-- 显示当前悬停的数据 -->
<text v-if="hoveredIndex !== null" :x="width / 2" :y="height / 2" text-anchor="middle" dominant-baseline="middle" font-size="16" fill="#FFFFFF">
{{slices.label }}: {{ slices.value }}%
</text>
</svg>
</div>
<div class="mySleep_class">
<!-- 睡眠检测 -->
<canvas id="mySleep" ref="multiLineChartSleep" width="850" height="400"></canvas>
</div>
</div>
</div>
<div class="phy-item" style="margin-top: 25px;">
<div style="margin-left: -985px;margin-top: 20px">
<img width="383px" height="36px" src="图片路径./upload/67c8171b82805.png" />
</div>
<div style="margin-top: 20px;height: 480px;">
<!-- 原始 -->
<canvas id="myOriginal" ref="multiLineChartOriginal" width="1200" height="400" @mousemove="handleMouseMoveOriginal"></canvas>
<!-- 工具提示 -->
<div v-if="hoveredPoint" :style="tooltipStyle">
<p>{{ hoveredPoint.label }}: {{ hoveredPoint.value }}</p>
</div>
</div>
</div>
</div>
</div>
</template>
<script>
import qs from "qs";
export default {
data() {
return {
// 示例数据
originalData: {}, // 原始数据
sleepData: {},// 睡眠数据
bigCanvasData: {
sleepTime: 0,
bigCanvas: {
deepSleep: 0,
rapidSleep: 0,
eyeMovementSleep: 0,
sober: 0
}
},// 统计数据
// 每条线的颜色和标签
lines: [
{ label: '血氧', key: 'bloodOxygen', color: '#2956ff' },
{ label: '心率', key: 'heartRate', color: '#ff3472' },
{ label: '体动', key: 'body', color: '#ffa531' }
],
// 鼠标悬停的数据点
hoveredPoint: null,
// 工具提示的位置
tooltipStyle: {
position: 'fixed', // 使用 fixed 定位，确保工具提示相对于视口定位
top: '0',
left: '0',
// backgroundColor: 'white', 背景颜色
// border: '1px solid #ccc', 边框
padding: '10px',
display: 'none',
zIndex: 1000, // 设置较高的 z-index
pointerEvents: 'none' // 防止工具提示遮挡鼠标事件
},
//---------------------------睡眠数据-------------------------
colorsSleep: [
{ label: '深睡',color: '#2956ff', prevX: 120},
{ label: '浅睡',color: '#5f81ff', prevX: 180},
{ label: '眼动',color: '#97adff', prevX: 240},
{ label: '清醒',color: '#ffb7b7', prevX: 300},
],
//---------------------------扇形统计图高低数据-------------------------
width: 240, // SVG 宽度
height: 240, // SVG 高度
hoveredIndex: null, // 当前悬停的扇形索引
//---------------------------下拉数据-------------------------
selectListData: [],
selectValue: '',
fullscreenLoading: true,
};
},
computed: {
// 计算每个扇形的数据
slices() {
const total = Object.values(this.bigCanvasData.bigCanvas).reduce((sum, value) => sum + value, 0);
if (total === 0) return []; // 如果数据为空，返回空数组
let startAngle = 0;
return this.colorsSleep.map((color, index) => {
const value = Object.values(this.bigCanvasData.bigCanvas);
const angle = (value / total) * 360;
const path = this.calculateSlicePath(startAngle, angle);
startAngle += angle;
return {
label: color.label,
value: value,
color: color.color,
path: path,
highlighted: this.hoveredIndex === index
};
});
}
},
mounted() {
this.doSelect();
},
methods: {
async doSelect(){
try {
// 通过异步接口获取调用接口的反馈状态和内容...
const {status: retCode, data: retJson} = await this.$http({
method: 'post',
url: '/wxapi.php/SleepTracker/doSelect'
});
// 如果状态码有错误...
if (retCode != 200) {
this.$message.error('获取列表数据失败！');
this.m_bIsLoading = false;
return;
}
// 获取失败的处理 => 显示获取到的错误信息...
if (retJson.err_code) {
this.$message.error(retJson.err_msg);
this.m_bIsLoading = false;
return;
}
this.selectListData = retJson.selectListData;
this.selectValue = this.selectListData.value;
// 获取数据
await this.doOriginalTrackerList();
await this.doSleepTrackerList();
this.fullscreenLoading = false;
} catch (inError) {
console.log(inError);
this.$message.error(inError);
}
},
// 原始数据获取
async doOriginalTrackerList() {
try {
// 然后，准备调用参数...
let thePostData = {
pathSleep: this.selectValue
}
// 通过异步接口获取调用接口的反馈状态和内容...
const {status: retCode, data: retJson} = await this.$http({
method: 'post',
url: '/wxapi.php/SleepTracker/readOriginal',
data: qs.stringify(thePostData)
});
// 如果状态码有错误...
if (retCode != 200) {
this.$message.error('获取原始数据失败！');
this.m_bIsLoading = false;
return;
}
// 获取失败的处理 => 显示获取到的错误信息...
if (retJson.err_code) {
this.$message.error(retJson.err_msg);
this.m_bIsLoading = false;
return;
}
this.originalData = retJson.OriginalList;
console.log('this.originalData: ', this.originalData);
this.drawMultiLineChartOriginal();
} catch (inError) {
console.log(inError);
this.$message.error(inError);
}
},
// 睡眠数据获取
async doSleepTrackerList() {
try {
let thePostData = {
pathSleep: this.selectValue
}
// 通过异步接口获取调用接口的反馈状态和内容...
const {status: retCode, data: retJson} = await this.$http({
method: 'post',
url: '/wxapi.php/SleepTracker/readSleep',
data: qs.stringify(thePostData)
});
// 如果状态码有错误...
if (retCode != 200) {
this.$message.error('获取睡眠数据失败！');
this.m_bIsLoading = false;
return;
}
// 获取失败的处理 => 显示获取到的错误信息...
if (retJson.err_code) {
this.$message.error(retJson.err_msg);
this.m_bIsLoading = false;
return;
}
this.sleepData = retJson.sleepList;
console.log('this.sleepData: ', this.sleepData);
this.bigCanvasData = retJson.bigCanvasData;
console.log('this.bigCanvasData: ', this.bigCanvasData);
this.drawSleepChartSleep();
this.calculateSlicePath();
} catch (inError) {
console.log(inError);
this.$message.error(inError);
}
},
// ------------------------------------------------------- 下拉框修改 ---------------------------------------------------------------------
async handlePathChange(inProductID) {
this.fullscreenLoading = true;
console.log("inProductID: ",inProductID)
this.selectValue = inProductID;
// 获取数据
await this.doOriginalTrackerList();
await this.doSleepTrackerList();
this.fullscreenLoading = false;
},
// ------------------------------------------------------- 饼形的路径 图 ---------------------------------------------------------------------
calculateSlicePath(startAngle, angle) {
const centerX = this.width / 2;
const centerY = this.height / 2;
const radius = Math.min(this.width, this.height) / 2;
const start = this.polarToCartesian(centerX, centerY, radius, startAngle);
const end = this.polarToCartesian(centerX, centerY, radius, startAngle + angle);
const largeArcFlag = angle > 180 ? 1 : 0;
return `M ${centerX} ${centerY} L ${start.x} ${start.y} A ${radius} ${radius} 0 ${largeArcFlag} 1 ${end.x} ${end.y} Z`;
},
// 将极坐标转换为笛卡尔坐标
polarToCartesian(centerX, centerY, radius, angleInDegrees) {
const angleInRadians = ((angleInDegrees - 90) * Math.PI) / 180;
return {
x: centerX + radius * Math.cos(angleInRadians),
y: centerY + radius * Math.sin(angleInRadians)
};
},
// 高亮扇形
highlightSlice(index) {
this.hoveredIndex = index;
},
// 重置高亮
resetHighlight() {
this.hoveredIndex = null;
},
// ------------------------------------------------------- 睡眠监控 图 ---------------------------------------------------------------------
drawSleepChartSleep() {
const canvas = this.$refs.multiLineChartSleep;
const ctx = canvas.getContext('2d');
ctx.clearRect(0, 0, canvas.width, canvas.height); // 清空整个画布
const padding = 50;
const chartWidth = canvas.width - padding * 2;
const chartHeight = canvas.height - padding * 2;
// Y 轴固定值
const yValues = ; // 深睡, 浅睡, 眼动, 清醒
const yLabels = ['', '深睡', '浅睡', '眼动', '清醒'];
// X 轴分成 当前睡了几个小时
const xScale = chartWidth / (this.sleepData.groupCountSleep + 1);
// 绘制 Y 轴
ctx.beginPath();
ctx.moveTo(padding, padding);
ctx.lineTo(padding, padding + chartHeight);
ctx.strokeStyle = '#ffffff'; // Y轴的线条用同背景颜色相同进行隐藏
ctx.lineWidth = 1;
ctx.stroke();
// 绘制 Y 轴刻度
ctx.fillStyle = '#666666';
ctx.font = '14px Arial';
ctx.textAlign = 'right';
yValues.forEach((value, index) => {
// 调整 Y 轴刻度位置
const y = padding + chartHeight - (chartHeight / 4) * index;
ctx.fillText(yLabels, padding - 10, y+42);
});
// 绘制 X 轴
ctx.beginPath();
ctx.moveTo(padding, padding + chartHeight);
ctx.lineTo(padding + chartWidth, padding + chartHeight);
ctx.strokeStyle = '#CCCCCC';
ctx.lineWidth = 1;
ctx.stroke();
// 绘制 X 轴刻度
ctx.fillStyle = '#999999';
ctx.font = '12px Arial';
ctx.textAlign = 'center';
for (let i = 0; i <= (this.sleepData.groupCountSleep + 1); i++) {
const x = padding + i * xScale;
ctx.fillText(i, x, padding + chartHeight + 20);
}
// // 绘制标题
// ctx.fillStyle = '#000';
// ctx.font = '18px Arial';
// ctx.textAlign = 'center';
// ctx.fillText('睡眠检测', padding, padding - 20);// 标题位置
//
// // 绘制圆点
// for (let i = 1; i < 5; i++) {
// // 绘制圆点
// ctx.beginPath(); // 开始新的路径
// ctx.arc(padding + (60 * i), padding - 25, 5, 0, 2 * Math.PI); // 创建圆
// ctx.fillStyle = this.colorsSleep.color; // 设置填充颜色
// ctx.fill(); // 填充圆
// ctx.strokeStyle = this.colorsSleep.color; // 设置边框颜色
// ctx.stroke();
//
// // 绘制标签
// ctx.fillStyle = '#000';
// ctx.font = '14px Arial';
// ctx.textAlign = 'left';
// // padding + 70 + (60 * (i-1))X轴的位置算法
// ctx.fillText(this.colorsSleep.label, this.colorsSleep.prevX, padding - 20);
// }
let prevX = padding+1;
let prevY = padding + chartHeight - ((this.sleepData.sleepListData.sleepStatus) / 4) * chartHeight;
const xStep = xScale / 60;// 现在数据总共有6个小时的数量，所以没一小时的x段又要分成60分
ctx.lineWidth = 5;//线条粗细度
this.sleepData.sleepListData.forEach((data, index) => {
const x = padding + (index * xStep)+1;
const y = padding + chartHeight - ((data.sleepStatus) / 4) * chartHeight;
const y2 = padding-3 + chartHeight - ((data.sleepStatus-1) / 4) * chartHeight;
if (index != 0 && this.sleepData.sleepListData.sleepStatus != data.sleepStatus){
ctx.beginPath(); // 开始新的路径
ctx.moveTo(x, y); // 移动到当前点
}else {
// 绘制线条
ctx.beginPath();
ctx.strokeStyle = this.colorsSleep.color; // 线条颜色
ctx.moveTo(prevX, prevY);
ctx.lineTo(x, y);
ctx.stroke();
}
// 绘制整个区域的线，造成一个区域全是这个颜色
for (let i = 1; i<= (y2-y); i++){
ctx.beginPath();
ctx.strokeStyle = this.colorsSleep.color; // 线条颜色
ctx.moveTo(prevX, y+i);
ctx.lineTo(x, y+i);
ctx.stroke();
}
// 更新上一个点的位置
prevX = x;
prevY = y;
});
},
// ------------------------------------------------------- 原始数据 图 ---------------------------------------------------------------------
drawMultiLineChartOriginal() {
const canvas = this.$refs.multiLineChartOriginal;
const ctx = canvas.getContext('2d');
// 清空画布
ctx.clearRect(0, 0, canvas.width, canvas.height);
// 设置图表区域的内边距
const padding = 50;
const chartWidth = canvas.width - padding * 2;
const chartHeight = canvas.height - padding * 2;
// 计算 X 轴的刻度
const xScale = chartWidth / (this.originalData.resultCollection.length - 1);
// 计算 Y 轴的最大值
const maxY = Math.max(
...this.originalData.resultCollection.map(d => parseFloat(d.bloodOxygen)),
...this.originalData.resultCollection.map(d => parseFloat(d.heartRate)),
...this.originalData.resultCollection.map(d => parseFloat(d.body))
);
// 绘制 X 轴和 Y 轴
ctx.beginPath();
ctx.moveTo(padding, padding);
ctx.lineTo(padding, padding + chartHeight);
ctx.lineTo(padding + chartWidth, padding + chartHeight);
ctx.strokeStyle = '#CCCCCC';
ctx.lineWidth = 2;
ctx.stroke();
// 绘制 X 轴刻度
ctx.fillStyle = '#999999';
ctx.font = '12px Arial';
ctx.textAlign = 'center';
const xStep = this.originalData.resultCollection.length / 10;
for (let i = 0; i <= 10; i++) {
const x = padding + (i * xStep) * xScale;
const label = Math.round((i * xStep) * (this.originalData.countOriginal / this.originalData.resultCollection.length));
ctx.fillText(label, x, padding + chartHeight + 20);
}
// 绘制 Y 轴刻度
ctx.textAlign = 'right';
for (let i = 0; i <= 10; i++) {
const y = padding + chartHeight - (chartHeight / 10) * i;
const value = (maxY / 10) * i;
ctx.fillText(value.toFixed(1), padding - 10, y + 5);
}
// 绘制三条线和数据点
this.lines.forEach(line => {
this.drawLineOriginal(ctx, line, padding, chartHeight, xScale, maxY);
this.drawDataPointsOriginal(ctx, line, padding, chartHeight, xScale, maxY);
});
// 在统计图内部绘制标题和图例
// this.drawTitleAndLegendOriginal(ctx, padding, chartWidth, chartHeight);
},
drawLineOriginal(ctx, line, padding, chartHeight, xScale, maxY) {
const data = this.originalData.resultCollection.map(d => parseFloat(d));
ctx.beginPath();
ctx.moveTo(padding, padding + chartHeight - (data / maxY) * chartHeight);
data.forEach((value, index) => {
const x = padding + index * xScale;
const y = padding + chartHeight - (value / maxY) * chartHeight;
ctx.lineTo(x, y);
});
ctx.strokeStyle = line.color;
ctx.lineWidth = 2;
ctx.stroke();
},
drawDataPointsOriginal(ctx, line, padding, chartHeight, xScale, maxY) {
const data = this.originalData.resultCollection.map(d => parseFloat(d));
data.forEach((value, index) => {
const x = padding + index * xScale;
const y = padding + chartHeight - (value / maxY) * chartHeight;
ctx.beginPath();
ctx.fill();
});
},
drawTitleAndLegendOriginal(ctx, padding, chartWidth, chartHeight) {
// 绘制标题
ctx.fillStyle = '#000';
ctx.font = '18px Arial';
ctx.textAlign = 'center';
ctx.fillText('原始数据', padding + chartWidth / 2, padding - 30);// 标题位置
// 绘制图例
const legendX = padding + 20; // 图例的起始 X 坐标
const legendY = padding + 20; // 图例的起始 Y 坐标
const legendItemHeight = 20; // 每个图例项的高度
const legendColorBoxSize = 16; // 颜色方块的大小
this.lines.forEach((line, index) => {
// 绘制颜色方块
ctx.fillStyle = line.color;
ctx.fillRect((padding + chartWidth / 2) - (70 - (60 * index)), (legendY + legendItemHeight) - 60, legendColorBoxSize, legendColorBoxSize);
// 绘制标签
ctx.fillStyle = '#000';
ctx.font = '14px Arial';
ctx.textAlign = 'left';
// 第一个当前50（-0） 第二个当前 -10（-60） 第三个当前 70（-60）
ctx.fillText(line.label, (padding + chartWidth / 2) - (50 - (60 * index)), (legendY + legendItemHeight + 14) - 60);
});
},
handleMouseMoveOriginal(event) {
const canvas = this.$refs.multiLineChartOriginal;
const rect = canvas.getBoundingClientRect();
const mouseX = event.clientX - rect.left;
const mouseY = event.clientY - rect.top;
const padding = 50;
const chartWidth = canvas.width - padding * 2;
const chartHeight = canvas.height - padding * 2;
const xScale = chartWidth / (this.originalData.resultCollection.length - 1);
const maxY = Math.max(
...this.originalData.resultCollection.map(d => parseFloat(d.bloodOxygen)),
...this.originalData.resultCollection.map(d => parseFloat(d.heartRate)),
...this.originalData.resultCollection.map(d => parseFloat(d.body))
);
// 查找鼠标附近的数据点
this.hoveredPoint = null;
this.lines.forEach(line => {
const data = this.originalData.resultCollection.map(d => parseFloat(d));
data.forEach((value, index) => {
const x = padding + index * xScale;
const y = padding + chartHeight - (value / maxY) * chartHeight;
if (Math.abs(mouseX - x) < 10 && Math.abs(mouseY - y) < 10) {
this.hoveredPoint = {
label: line.label,
value: value
};
this.tooltipStyle.display = 'block';
this.tooltipStyle.left = `${event.clientX + 10}px`;
this.tooltipStyle.top = `${event.clientY + 10}px`;
}
});
});
if (!this.hoveredPoint) {
this.tooltipStyle.display = 'none';
}
}
},
}
</script>
<style scoped>
/*canvas {*/
/* border: 1px solid #ddd; !* 外部边框 *!*/
/* background-color: #f9f9f9; !* 背景颜色 *!*/
/*}*/
#myOriginal {
margin: 0 auto; /* 设置左右外边距为 auto，以便居中 */
display: block; /* 将 canvas 设置为块级元素 */
}
.phy-item {
display: flex;
flex-direction: column; /* 纵向排列 */
margin: 0 auto; /* 设置左右外边距为 auto，以便居中 */
justify-content: space-between; /* 将子元素分布在容器的两端 */
align-items: center; /* 垂直居中 */
text-align: center;
position: relative;
width: 1400px;
height: 500px;
background: #ffffff; /* 背景色 */
border-radius: 16px;
box-shadow:
-10px -10px 20px rgba(224, 237, 252, 0.8), /* 左上角渐变颜色 */
10px 10px 20px rgba(241, 248, 254, 0.8); /* 右下角渐变颜色 */
flex-grow: 1; /* 让子元素填充父元素的空间 */
}
.mySleep_class{
flex: 2; /* 线条图占据 2/3 的空间 */
margin-left: 105px;
margin-top: -50px;
}
.svg_class{
flex: 1; /* 饼图占据剩余空间的一半 */
margin-top: 40px; /* 设置左右外边距为 auto，以便居中 */
}
.top-right-div {
position: absolute; /* 使用绝对定位 */
top: 17px; /* 距离顶部 40px */
right: 25px; /* 距离右侧 10px */
}
/*#mySleep {*/
/*}*/
</style>
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