本篇文章給大家分享的是有關(guān)利用zrender.js怎么繪制一個體溫單，小編覺得挺實用的，因此分享給大家學習，希望大家閱讀完這篇文章后可以有所收獲，話不多說，跟著小編一起來看看吧。
以下為模擬數(shù)據(jù)
重慶分公司
重慶分公司
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filterData(){
const data = chartData
data.forEach(el => {
switch (el.type) {
case "text":
// this.zrText(el)
break;
case "line":
this.zrLine(el)
break;
case "area":
this.zrPolyline(el)
break;
case "tag":
this.zrTag(el)
break;
default:
break;
}
});
}我們在新增一個文件夾創(chuàng)建utli.js這個文件夾的作用為我們把創(chuàng)建線創(chuàng)建圓的公共方法寫在這個js文件里
utli.js 我們先說 createLine createCircle
createLine 需要傳5個參數(shù)分別為開始點的橫縱坐標 結(jié)束點的橫縱坐標 還有線的樣式
createCircle 需要傳4個參數(shù)分別為 圓點的橫縱坐標 圓的半徑 和樣式
addHover 也需要 這時我們需要在init 方法里添加一段代碼(上一章創(chuàng)建的初始化方法) 這段代碼為創(chuàng)建一個div到時我們鼠標移到圓上會彈出文本信息的時候回用到
var div = document.createElement("div")
div.classList.add("tips")
document.getElementById("main").append(div)utli.js
//線段
export const createLine = (x1,y1,x2,y2,style)=>{
return new zrender.Line({
shape:{
x1:x1,
y1:y1,
x2:x2,
y2:y2
},
style:style,
});
};
// cx 橫坐標 cy縱坐標 r半徑 空心圓
export const createCircle = (cx,cy,r,style)=>{
return new zrender.Circle({
shape:{
cx:cx,
cy:cy,
r:r
},
style:style,
zlevel:4
})
}
//添加horver事件 el 元素對象 config 一些配置項 x x軸坐標 y y軸坐標 shapeOn鼠標移入一些屬性配置 shapeOn鼠標移出一些屬性配置 shape配置項看官網(wǎng)
export const addHover = (el,config,x,y,shapeOn,shapeOut) => {
const domTips = document.getElementsByClassName("tips")
el.on('mouseover',function(){
domTips[0].innerHTML = config.tips
domTips[0].setAttribute("style",`position:absolute;top:${y-13}px;left:${x}px;display:block;font-size:10px;background-color:rgba(0,0,0,.7);padding:3px;border-radius:3px;color:#fff`)
el.animateTo({
shape:shapeOn
},100,0)
}).on('mouseout',function () {
domTips[0].setAttribute("style",`display:none`)
el.animateTo({
shape:shapeOut
},100,0)
})
}
//多邊形
export const createPolygon = (points,style) => {
return new zrender.Polyline({
shape:{
points:points,
},
style:style
})
}zrLine方法里的第一段代碼 判斷這個折線拐點是需要空心圓還是實心圓還是其他的形狀 都通過shape決定 color為圓的邊框顏色填充色為白色 先定義一個style變量到時好實現(xiàn)自定義
var style = {}
switch (data.shape) {
case "x-circle":
style = {
stroke:data.color,
fill:"#fff",
text:"x",
}
break;
case "empty-circle":
style = {
stroke:data.color,
fill:"#fff",
text:"",
}
break;
default:
break;
}這里需要在添加2個方法
getX
//獲取X坐標 data當前時間點
getX(data){
let XShareOne = this.XShareOne()
return data * XShareOne
},transformY
//轉(zhuǎn)換y軸坐標點為正確坐標點 因為y軸坐標是頂點為0遞增的 所有用總高度減去原來坐標的高度剩下的高度就是正確坐標點
//i代表一個格子代表幾個高度
transformY(data,i){
let YHeight = this.YShareOne()
//計算出剩余高度
let surplusHeight = this.canavsHeight - (YHeight/i) * data
return surplusHeight
},這段代碼意思是先把數(shù)據(jù)遍歷出來 在通過time屬性計算出x坐標 value值計算出y坐標 x軸左邊基本是以time為基本來計算的 y軸坐標可能會隨數(shù)據(jù)變化而有所改變 Break屬性為是否斷線 如果需要斷線就位true
data.array.forEach((el,i) =>{
if (i > 0) {
let XShareOne = this.XShareOne()
let firstX = this.getX(data.array[i-1].time)
let firstY = this.transformY(data.array[i-1].value,1)
let x = this.getX(data.array[i].time)
let y = this.transformY(data.array[i].value,1)
if (data.array[i-1].Break == "false") {
let line = createLine(firstX,firstY,x,y,{
stroke:"#af2377",
lineWidth:2,
})
this.zr.add(line)
}
}
if (el.extraArr && el.extraArr.length > 0) {
el.extraArr.forEach((item,a) => {
let x = this.getX(el.time)
let y = this.transformY(el.value,1)
let lastY = this.transformY(item.extra,1)
let dottedLine = createLine(x,y,x,lastY,{
stroke:"#af2377",
lineWidth:2,
lineDash:[2,2]
})
this.zr.add(dottedLine)
el.extraArr.forEach((item,a) => {
let getY = this.transformY(item.extra,1)
let Circle = createCircle(x,getY,5,{
stroke:item.extraColor,
fill:"#fff",
})
this.zr.add(Circle)
addHover(Circle,{
tips:item.extraTips,
},x,getY,{
r:8,
},{
r:5,
})
})
})
}
let getX = this.getX(el.time)
let getY = this.transformY(el.value,1)
let Circle = createCircle(getX,getY,5,style)
this.zr.add(Circle)
addHover(Circle,el,getX,getY,{
r:8,
},{
r:5,
})
})這步完成折線圖應(yīng)該就畫好了
下次我們將陰影的畫法
以上就是利用zrender.js怎么繪制一個體溫單，小編相信有部分知識點可能是我們?nèi)粘９ぷ鲿姷交蛴玫降?。希望你能通過這篇文章學到更多知識。更多詳情敬請關(guān)注創(chuàng)新互聯(lián)行業(yè)資訊頻道。
