使用zrender.js绘制体温单效果

段渊

2023-03-14

本文向大家介绍使用zrender.js绘制体温单效果，包括了使用zrender.js绘制体温单效果的使用技巧和注意事项，需要的朋友参考一下

今天我们来画折线图效果图

以下为模拟数据

[{"time":19,"text":"入\n院\n19\n时\n11\n分","position":42,"cellMin":29.0,"cellSplit":0.2,"type":"text","color":"red","shape":null},{"time":22,"text":"手\n术","position":42,"cellMin":29.0,"cellSplit":0.2,"type":"text","color":"red","shape":null},{"time":129,"text":"手\n术","position":42,"cellMin":29.0,"cellSplit":0.2,"type":"text","color":"red","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":30.0,"type":"baseline","color":"#000","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":31.0,"type":"baseline","color":"#000","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":32.0,"type":"baseline","color":"#000","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":33.0,"type":"baseline","color":"#000","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":34.0,"type":"baseline","color":"#000","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":35.0,"type":"baseline","color":"#000","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":36.0,"type":"baseline","color":"#000","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":37.0,"type":"baseline","color":"#000","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":38.0,"type":"baseline","color":"#000","shape":null},{"cellMin":28.0,"cellSplit":0.2,"y":39.0,"type":"baseline","color":"red","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":40.0,"type":"baseline","color":"#000","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":41.0,"type":"baseline","color":"#000","shape":null},{"cellMin":29.0,"cellSplit":0.2,"y":42.0,"type":"baseline","color":"#000","shape":null},{"cellMin":29.0,"cellSplit":0.2,"array":[{"time":19,"tips":"体温37.1","value":"37.1","shape":"x","Break":"false","type":"temperature","extraArr":[],"others":[]},{"time":21,"tips":"体温36.9","value":"36.9","shape":"x","Break":"false","type":"temperature","extraArr":[],"others":[]},{"time":30,"tips":"体温36.5","value":"36.5","shape":"x","Break":"false","type":"temperature","extraArr":[],"others":[]},{"time":38,"tips":"体温36.6","value":"36.6","shape":"x","Break":"false","type":"temperature","extraArr":[],"others":[]},{"time":54,"tips":"体温36.7","value":"36.7","shape":"x","Break":"false","type":"temperature","extraArr":[],"others":[]}],"type":"line","color":"blue","shape":"x-circle"},{"cellMin":-10.0,"cellSplit":2.0,"array":[{"time":19,"shape":"empty-circle","tips":"呼吸20","value":"20","Break":"false"},{"time":21,"shape":"empty-circle","tips":"呼吸20","value":"20","Break":"false"},{"time":30,"shape":"empty-circle","tips":"呼吸19","value":"19","Break":"false"},{"time":38,"shape":"empty-circle","tips":"呼吸18","value":"18","Break":"false"},{"time":54,"shape":"empty-circle","tips":"呼吸19","value":"19","Break":"false"}],"type":"line","color":"black","shape":"empty-circle"},{"cellMin":-2.0,"cellSplit":1.0,"array":[{"time":19,"tips":"疼痛7","value":"7","Break":"false","type":"pain","extraArr":[{"extra":"3","extraColor":"red","extraTips":"疼痛评价3"}],"others":[]},{"time":23,"tips":"疼痛3","value":"3","Break":"false","type":"pain","extraArr":[],"others":[]},{"time":27,"tips":"疼痛3","value":"3","Break":"false","type":"pain","extraArr":[],"others":[]},{"time":33,"tips":"疼痛3","value":"3","Break":"false","type":"pain","extraArr":[],"others":[]},{"time":39,"tips":"疼痛3","value":"3","Break":"false","type":"pain","extraArr":[{"extra":"3","extraColor":"red","extraTips":"疼痛评价3"}],"others":[]},{"time":44,"tips":"疼痛3","value":"3","Break":"false","type":"pain","extraArr":[],"others":[]},{"time":51,"tips":"疼痛3","value":"3","Break":"false","type":"pain","extraArr":[],"others":[]},{"time":58,"tips":"疼痛3","value":"3","Break":"false","type":"pain","extraArr":[{"extra":"3","extraColor":"red","extraTips":"疼痛评价3"}],"others":[]}],"type":"line","color":"red","shape":"empty-circle"},{"bgColor":"rgba(255,0,0,0.7)","cellMin":30.0,"cellSplit":2.0,"array":[{"time":19,"v1":69,"v1Tips":"心率69","v2":69,"v2Tips":"脉搏69","Break":"false"},{"time":21,"v1":70,"v1Tips":"心率70","v2":70,"v2Tips":"脉搏70","Break":"false"},{"time":30,"v1":83,"v1Tips":"心率83","v2":83,"v2Tips":"脉搏83","Break":"false"},{"time":38,"v1":78,"v1Tips":"心率78","v2":78,"v2Tips":"脉搏78","Break":"false"},{"time":54,"v1":77,"v1Tips":"心率77","v2":77,"v2Tips":"脉搏77","Break":"false"}],"type":"area","color":"red","shape":null},{"text":null,"y":"28","cellMin":-10.0,"cellSplit":2.0,"array":[],"type":"tag","color":"black","shape":null},{"text":null,"y":null,"cellMin":30.0,"cellSplit":2.0,"array":[],"type":"tag","color":"black","shape":null}]

　　首先创建filterData方法用于过滤数据 text文本 line线段 area圆 tag暂时用不到今天说的是折线所以创建zrLine 方法

filterData(){
   const data = chartData
   
   data.forEach(el => {
    html" target="_blank">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;
    }
    });
  }

我们在新增一个文件夹创建utli.js这个文件夹的作用为我们把创建线创建圆的公共方法写在这个js文件里

utli.js 我们先说 createLine createCircle

createLine 需要传5个参数分别为开始点的横纵坐标结束点的横纵坐标还有线的样式

createCircle 需要传4个参数分别为圆点的横纵坐标圆的半径和样式

addHover 也需要这时我们需要在init 方法里添加一段代码(上一章创建的初始化方法) 这段代码为创建一个div到时我们鼠标移到圆上会弹出文本信息的时候回用到

var div = document.createElement("div")
   div.classList.add("tips")
   document.getElementById("main").append(div)

utli.js

//线段
export const createLine = (x1,y1,x2,y2,style)=>{
  return new zrender.Line({
    shape:{
      x1:x1,
      y1:y1,
      x2:x2,
      y2:y2
    },
    style:style,
  });
};
// cx 横坐标 cy纵坐标 r半径 空心圆
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 元素对象 config 一些配置项 x x轴坐标 y y轴坐标 shapeOn鼠标移入一些属性配置 shapeOn鼠标移出一些属性配置 shape配置项看官网 
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)
  })
}
//多边形
export const createPolygon = (points,style) => {
  return new zrender.Polyline({
    shape:{
      points:points,
    },
    style:style
  })
}

zrLine方法里的第一段代码判断这个折线拐点是需要空心圆还是实心圆还是其他的形状都通过shape决定 color为圆的边框颜色填充色为白色先定义一个style变量到时好实现自定义

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;
   }

这里需要在添加2个方法

getX

//获取X坐标 data当前时间点
  getX(data){
   let XShareOne = this.XShareOne()
   return data * XShareOne
  },

transformY

//转换y轴坐标点为正确坐标点 因为y轴坐标是顶点为0递增的 所有用总高度减去原来坐标的高度剩下的高度就是正确坐标点
  //i代表一个格子代表几个高度
  transformY(data,i){
   let YHeight = this.YShareOne()
   
   //计算出剩余高度
   let surplusHeight = this.canavsHeight - (YHeight/i) * data
   return surplusHeight
  },

这段代码意思是先把数据遍历出来在通过time属性计算出x坐标 value值计算出y坐标 x轴左边基本是以time为基本来计算的 y轴坐标可能会随数据变化而有所改变 Break属性为是否断线如果需要断线就位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,
    })
   })

这步完成折线图应该就画好了

下次我们将阴影的画法

总结

以上所述是小编给大家介绍的使用zrender.js绘制体温单效果,希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对小牛知识库网站的支持！
如果你觉得本文对你有帮助，欢迎转载，烦请注明出处，谢谢！

使用zrender.js绘制体温单效果

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