注释：
最开始接到一个需求，画一个线状图，因为跟我对接的人比较随性，就简单给我看了一眼之后并没有跟我过多的交代。所以果断选择了百度的ECharts,下面就是效果图
ECharts线状图.gif
百度的ECharts其实各方面真的很牛逼，这里点赞。
但是这边收到，只能显示给出xy值，而且等比缩放。此处当时一万只草泥马心中呼啸而过~~~
终始心中再多不愿，但是还是得做啊，然后还是看效果图吧。
canvas 等比例线状图.gif
弹框直接用css写了，至于canvas，哎，对于小白来说，还是。。。（还是贴下canvas代码）
function canvas () {
let dataJson = {
'chartDef': {
'lines': [{
'nodes': [{
'xCell': {
'name': 'D6',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '05849ff7-912a-46e8-8353-9a78f5d287d5',
'dependCellNames': []
},
'yCell': {
'name': 'D7',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '8831344f-df51-4406-8147-97a8fa1b8321',
'dependCellNames': []
}
}, {
'xCell': {
'name': 'H6',
'pageid': 'S5999_9090_15511609586330678',
'cellid': 'd5bc4860-447b-4d9e-a04d-35a1a8e2bd32',
'dependCellNames': []
},
'yCell': {
'name': 'H7',
'pageid': 'S5999_9090_15511609586330678',
'cellid': 'f7b72758-1a38-471b-9b4b-64c80ef01dc0',
'dependCellNames': []
}
}, {
'xCell': {
'name': 'L6',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '3328a37c-d52c-4e84-9f67-6eb35a4704a2',
'dependCellNames': []
},
'yCell': {
'name': 'L7',
'pageid': 'S5999_9090_15511609586330678',
'cellid': 'd676ac3a-02b1-481c-b457-c3763cca694b',
'dependCellNames': []
}
}, {
'xCell': {
'name': 'P6',
'pageid': 'S5999_9090_15511609586330678',
'cellid': 'b516b026-0e85-4f8e-8486-7353586a9604',
'dependCellNames': []
},
'yCell': {
'name': 'P7',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '171c2575-0cbf-4f74-9f88-05d18c979981',
'dependCellNames': []
}
}, {
'xCell': {
'name': 'T6',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '380e2f84-2679-4461-b6cb-1d5f3d37ffd4',
'dependCellNames': []
},
'yCell': {
'name': 'T7',
'pageid': 'S5999_9090_15511609586330678',
'cellid': 'fe89d0f0-86f3-450d-b399-76a3a5830b2a',
'dependCellNames': []
}
}], 'lineColor': 'red'
}, {
'nodes': [{
'xCell': {
'name': 'D6',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '05849ff7-912a-46e8-8353-9a78f5d287d5',
'dependCellNames': []
},
'yCell': {
'name': 'F7',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '780a2956-3c74-49f3-a9c8-2a0e9987a5d8',
'dependCellNames': []
}
}, {
'xCell': {
'name': 'H6',
'pageid': 'S5999_9090_15511609586330678',
'cellid': 'd5bc4860-447b-4d9e-a04d-35a1a8e2bd32',
'dependCellNames': []
},
'yCell': {
'name': 'J7',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '88d70134-2a47-4c28-83dd-3f6128801d84',
'dependCellNames': []
}
}, {
'xCell': {
'name': 'L6',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '3328a37c-d52c-4e84-9f67-6eb35a4704a2',
'dependCellNames': []
},
'yCell': {
'name': 'N7',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '51f25018-95ab-4124-9489-e3dae4c32074',
'dependCellNames': []
}
}, {
'xCell': {
'name': 'P6',
'pageid': 'S5999_9090_15511609586330678',
'cellid': 'b516b026-0e85-4f8e-8486-7353586a9604',
'dependCellNames': []
},
'yCell': {
'name': 'R7',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '2809f3f2-be48-45d9-b7a3-8a6e468455fe',
'dependCellNames': []
}
}, {
'xCell': {
'name': 'T6',
'pageid': 'S5999_9090_15511609586330678',
'cellid': '380e2f84-2679-4461-b6cb-1d5f3d37ffd4',
'dependCellNames': []
},
'yCell': {
'name': 'V7',
'pageid': 'S5999_9090_15511609586330678',
'cellid': 'c8e1864c-fb31-4e3e-8ce5-3fb15386eb11',
'dependCellNames': []
}
}], 'lineColor': 'black'
}], 'needGetCross': false, 'xName': 'x轴', 'yName': 'y轴'
}
}
let arrData = dataJson.chartDef.lines, colors = [], series = [], arrX = [], maxNum = []
for (let i = 0; i < arrData.length; i++) {
colors.push(arrData[i].lineColor) //添加颜色
arrX.push([]) //获取y轴坐标值
series.push({data:[]})
for (let j = 0; j < arrData[i].nodes.length; j++) {
arrX[i].push(parseFloat($('#' + arrData[i].nodes[j].xCell.cellid).html()))
series[i].data.push($('#' + arrData[i].nodes[j].yCell.cellid).html())
maxNum.push($('#' + arrData[i].nodes[j].yCell.cellid).html())
}
}
let data = series, max = getMaxNum(data[0].data), min = getMinNum(data[0].data)
document.getElementById('container').style.width = window.screen.wdith + 'px'
let padding = 30
let width = $(window).width() - padding
let height = 300
document.getElementById('canvas').setAttribute('width', width)
document.getElementById('canvas').setAttribute('height', height)
let num = parseInt((width - (2 * padding)) / 12)
var pointX = []
/*X*/
for (let i = 0; i < num; i++) {
pointX.push(padding + i * width / num)
}
var pointY = []
for (let i = 0; i < num; i++) {
pointY.push(height - padding - i * height / num)
}
var canvas = document.getElementById('canvas').getContext('2d')
function drawX () { //x轴网格线 和 xy坐标线
for (var i = 1; i < pointY.length; i++) {
canvas.beginPath()
if (i == pointY.length - 1) {
canvas.strokeStyle = '#000'
canvas.moveTo(pointX[0], height - padding)
canvas.lineTo(pointX[pointY.length - 1], height - padding)
canvas.moveTo(pointX[0], height - padding)
canvas.lineTo(pointX[0], 0)
} else {
canvas.strokeStyle = '#ccc'
canvas.moveTo(pointX[0], pointY[i])
canvas.lineTo(pointX[pointY.length - 1], pointY[i])
}
canvas.closePath()
canvas.lineWidth = 1
canvas.stroke()
}
}
drawX()
function drawY () { //y轴网格线
for (var i = 1; i < pointX.length; i++) {
canvas.beginPath()
canvas.strokeStyle = '#ccc'
for (var i = 1; i < pointX.length; i++) {
canvas.moveTo(pointX[i], height - padding)
canvas.lineTo(pointX[i], 0)
}
canvas.closePath()
canvas.lineWidth = 1
canvas.stroke()
}
}
drawY()
function drawZ () { //尺标线
maxNum = getMaxNum(maxNum)
canvas.font = '16px Arial'
for (let i = 0; i < arrX.length; i++) {
canvas.beginPath()
canvas.strokeStyle = colors[i]
canvas.fillStyle = colors[i]
let arr = arrX[i],
maxX = getMaxNum(arr), //x轴坐标最大值
minX = getMinNum(arr), //x轴坐标最小值
sumX = maxX - minX, //x轴坐标相差值
pointX = [],
maxY = getMaxNum(data[i].data), //Y轴坐标最大值
minY = getMinNum(data[i].data), //Y轴坐标最小值
sumY = maxY - minY, //Y轴坐标相差值
pointY = [];
//根据已得到的坐标值“重新计算xy轴的每个坐标”
for (let a = 0; a < arr.length; a++) {
if (a == 0) {
pointX.push((width - padding) * 0)
} else {
pointX.push((width - padding) * ((arr[a] - minX) / sumX).toFixed(2))
}
pointY.push((height - padding) - (height - padding) * (data[i].data[a] / maxNum).toFixed(2))
}
//根据重新计算的坐标值绘制“线条”和“刻度值”
for (let j = 0; j < pointX.length; j++) {
//线
canvas.arc(pointX[j] + padding, pointY[j], 2,0.5*Math.PI,true)
canvas.moveTo(pointX[j] + padding, pointY[j])
canvas.lineTo(pointX[j + 1] + padding, pointY[1 + j])
//字
canvas.fillText(data[i].data[j], 0, pointY[j] + 16)
canvas.fillText(arr[j], pointX[j] + 10, height - 10)
}
canvas.closePath()
canvas.stroke()
canvas.lineWidth = 1
canvas.stroke()
}
}
drawZ()
}
//获取最大数
function getMaxNum (arr) {
// 将数组第一个元素的值赋给max
var max = parseFloat(arr[0])
// 使用for 循环从数组第一个值开始做遍历
for (var i = 1; i < arr.length; i++) {
// 如果元素当前值大于max,就把这个当前值赋值给max
if (parseFloat(arr[i]) > parseFloat(max)) {
max = parseFloat(arr[i])
}
}
// 返回最大的值
return max
}
//获取最小数
function getMinNum (arr) {
// 将数组第一个元素的值赋给min
var min = parseFloat(arr[0])
// 使用for 循环从数组第一个值开始做遍历
for (var i = 1; i < arr.length; i++) {
// 如果元素当前值小于min,就把这个当前值赋值给min
if (parseFloat(arr[i]) < parseFloat(min)) {
min = parseFloat(arr[i])
}
}
// 返回最小的值
return min
}
这是根据自己的代码编写，比如json数据，和获取数据的方式，只取这么一段代码无法完全显示最终效果。有需要的请自己去做出改动。
想获取代码请点击>>canvas 等比例线状图（可输入编辑）
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