預覽地址http://106.12.212.110:8077/#/

上期我們說了如何建立專案並把各個專案的檔案結構建立好後這期我們來說如何畫出圖中代寫線段

首先我們在src/components/Render.vue中新增一下引用

import zrender from 'zrender'
import {chartData,configData} from '@/mock/index' 這是mock資料
import { createLine,createCircle,addHover,createPolygon,hoverLine } from '../js/utli' 這是負責建立線段 陰影圖等 公共方法 該檔案在文章底部
import {mapState,mapGetters,mapMutations,mapActions} from 'vuex' 這是vuex負責儲存資料
 

然後我們在data裡寫入以下屬性

//線段開始橫座標
      lineStartX:0,
      //線段開始縱座標
      lineStartY:0,
      //線段結束橫座標
      lineEndX:0,
      //線段結束縱座標
      LineEndY:0,
      //多少個y軸座標
      xLineLen:{
        //天數 7天 
        day:0,
        //一天多少分段
        time:6
      },
      canavsWidth:0, //畫板寬度
      canavsHeight:0, //畫板高度
      zr:"", //畫板屬性
      yLineLen:{
        XRegion:13, //X軸座標分幾個大塊
        XShare:5, //每塊份幾個小塊
        XLineArr:[3], //需要特殊處理的橫線 衝上往下算
      },
      YLineReset:[], //Y軸每一小格份幾份
      width:0,
      YCellHeight:0, //y軸大格子高度
      lastData:0,  //上一個資料
      CircleSize:8, //畫板上圓點的直徑
      hoverCircleSize:10,//畫板上圓點移入變化的直徑
      fontSize:15, //畫板上圓圈裡的字型大小 
 

這些屬性都是以資料的形式來建立畫板的橫座標 豎座標 橫線 豎線 基礎屬性建立好後我們在methods裡先建立一個init方法 該方法負責初始化建立一個cavans畫板 以及獲取一些頁面基礎屬性

init(){
      this.zr = zrender.init(document.getElementById("main"))
      var div = document.createElement("div")
      div.classList.add("tips")
      document.getElementById("main").append(div)
      
      this.canavsWidth = this.zr.getWidth()
      this.canavsHeight = this.zr.getHeight()
      
      if (this.httpType == 'http') {
         this.$axios({
            method:'post',
            url:`${this.configUrl}/api/PatrolInfo/ChartData`,
            data:{"PatientCode":this.urlData['cstId'],"beginDate":this.urlData['begin'],"endDate":this.urlData['end'],"PatroInfoType":this.urlData['PatroInfoType']},
          }).then(res => {
              res = res.data.Data
              this.xLineLen.time = this.TimeArr.length
              this.YLineReset = this.resetY(this.TimeArr)
              this.filterData(res)
              this.yLine() //生成Y軸座標
              this.xLine() //生成X軸座標
              this.getCellHeight()
          })
      }else{
        this.xLineLen.time = this.TimeArr.length
        this.xLineLen.day = 7
        this.YLineReset = this.resetY(this.TimeArr)
        this.filterData(chartData)
        this.yLine() //生成Y軸座標
        this.xLine() //生成X軸座標
        this.getCellHeight()
      }
      // this.hoverLine()
    },
 

這裡使用了一個判斷 來判斷當前是本地版本還是線上版本

這裡的httpType通過src/store/http.js來配置是本地還是線上 沒有檔案請先建立

http.jshttpType是mock就是本地 http就是線上

import Vue from 'vue'
import Vuex from 'vuex'
import axios from 'axios'

Vue.use(Vuex)

const store = new Vuex.Store({
    state:{
        configUrl:'', //先自己的請求地址
        httpType:"mock",
        data:JSON.parse(localStorage.getItem('patientData')), //此方法可用可不用  用於基礎普通html專案是使用
    },
    mutations:{
      
    },
    actions:{
        getUrlData(context){
            context.commit('setUrlData',data)
        }
    }
})

export default store

init方法建立好后里面有4個方法分別是

yLine() {
      //橫座標 最底部橫座標
      let Xline = new zrender.Line({
        shape:{
          x1:0,
          y1:this.canavsHeight,
          x2:this.canavsWidth,
          y2:this.canavsHeight
        }
      })
      this.zr.add(Xline)
      const yWidth = this.canavsWidth/this.xLineLen.day
      
      //迴圈顯示豎線格子 紅色豎線
      for (let i = 0; i < this.xLineLen.day; i++) {
         //縱座標
        let Yline = new zrender.Line({
          shape:{
            x1:yWidth*i,
            y1:0,
            x2:yWidth*i,
            y2:this.canavsHeight
          },
          style:{
            opacity:1,
            lineWidth:1,
            stroke:"#ff0000"
          }
        })
        this.zr.add(Yline)
      }

      let yLinAll = this.xLineLen.day*this.xLineLen.time
      for (let i = 0; i < yLinAll; i++) {
         let Yline = new zrender.Line({
          shape:{
            x1:yWidth/this.xLineLen.time*i,
            y1:0,
            x2:yWidth/this.xLineLen.time*i,
            y2:this.canavsHeight
          },
          style:{
            opacity:1,
            lineWidth:0.5,
            stroke:"#000"
          }
        })
   
        this.zr.add(Yline)
      }
    },
    xLine(){
      let xHeight = this.canavsHeight/this.yLineLen.XRegion
      let XShareAll = this.yLineLen.XRegion*this.yLineLen.XShare
      for (let i = 0; i < this.yLineLen.XRegion; i++) {
        let color = "#000"
        this.yLineLen.XLineArr.forEach(el => {
          if (el == i) {
            color = "#ff0000"
          }
        });
        //橫座標 加粗
        let Xline = new zrender.Line({
          shape:{
            x1:0,
            y1:xHeight*i,
            x2:this.canavsWidth,
            y2:xHeight*i
          },
          style:{
            opacity:1,
            lineWidth:2,
            stroke:color
          }
        })
        this.zr.add(Xline)

        for (let a = 0; a < XShareAll; a++) {
          //橫座標
          let Xline = new zrender.Line({
            shape:{
              x1:0,
              y1:xHeight/this.yLineLen.XShare*a,
              x2:this.canavsWidth,
              y2:xHeight/this.yLineLen.XShare*a
            },
            style:{
              opacity:1,
              lineWidth:0.4,
              stroke:"#000"
            }
          })
          this.zr.add(Xline)
        }
      }
    },
    filterData(data){
      //重置資訊 避免重複出現的bug
      this.lastData = 0
      data.forEach((el,i) => {
        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;
        }
        });
    },

橫縱座標建立好後我們就開始建立折線 陰影等圖

//繪製文字內容
    zrText(data){
      if (this.xLineLen.day*24 >= data.time) {
        //最小值
        const cellMin = data.cellMin
        //座標軸每格代表值
        const cellSplit = data.cellSplit
        var textWidthHeight = 15 //一個字的原始寬度高度
        var textHeight = 0 //字型總高度
        var textWidth = textWidthHeight //字型總寬度
        var moveRange = textWidthHeight/2 //需要移動的距離 用於移動字型下面的矩形背景框
        //計算文字高度
        if (data.text) {
          let dataLen = data.text.split("\n").length
          //需要換行的字型 移動距離是字型的一半 每個字寬度，高度為12
          if (dataLen > 1) {
            textHeight = dataLen * textWidthHeight
            textWidth = textWidthHeight
          } else {
            let textLen = data.text.length
            textHeight = textWidthHeight
            textWidth = textWidthHeight * textLen
            moveRange = textWidthHeight
          }
        }
        let xWidth = this.XShareOne(data.time)
        
        //如果和上一個時間相同就往後移動
        if ( this.lastData != 0 || data.time <= 1 ) {
          if (this.lastData == data.time) {
            xWidth = xWidth + textWidth + 5
          }
        }
        this.lastData = data.time  //存入當前時間 用於重合區分
        let YHeight = this.YShareOne().height
        let y = this.transformY(data.position,cellSplit,cellMin)
        let state = new zrender.Group();
        state.add(
          new zrender.Rect({
            shape:{
              x:xWidth-(textWidth/2),
              y:y,
              width:textWidth,
              height:textHeight
            },
            style:{
              fill:"#FFF"
            },
            zlevel:4
          })
        )
        state.add(
          new zrender.Text({
            style:{
              text:data.text,
              textShadowColor:"#fff",
              textStroke:"#fff",
              textFill:data.color,
              textAlign:"center",
              fontSize:13
            },
            position:[xWidth,y],
            zlevel:4
          })
        );
        this.zr.add(state)
      }
    },
zrLine(data){
      
      var style = {}
      //最小值
      const cellMin = data.cellMin
      //座標軸每格代表值
      const cellSplit = data.cellSplit
            
      data.array.forEach((el,i) =>{
        //過濾shape 個別需特殊處理 後期需優化
        switch (el.shape) {
          case "x-circle":
            style = {
              stroke:data.color,
              fill:"#fff",
              text:"x",
              fontSize:this.fontSize
            }
            break;
          case "empty-circle":
            style = {
              stroke:data.color,
              fill:"#fff",
              text:"",
            }
            break;
          case 'x':
            style = {
              stroke:data.color,
              fill:"#fff",
              text:"x",
              fontSize:this.fontSize
            }
            break;
          case 'o-circle':
            style = {
              stroke:data.color,
              fill:"#fff",
              text:"●",
              fontSize:this.fontSize
            }
            break;
          case '':
            style = {
              stroke:data.color,
              fill:data.color,
              text:"",
            }
            break;
          default:
            break;
        }
        //疼痛單獨處理
        if (el.type == "pain") {
           style = {
              stroke:data.color,
              fill:"#fff",
              text:"",
            }
        }
        
        if (i > 0) {
          let firstX = this.getX(data.array[i-1].time)  
          let firstY = this.transformY(data.array[i-1].value,cellSplit,cellMin)

          let x = this.getX(data.array[i].time)
          let y = this.transformY(data.array[i].value,cellSplit,cellMin)
          
          if (data.array[i-1].Break == "false") {
            let line = createLine(firstX,firstY,x,y,{
                stroke:data.color,
                lineWidth:2,
            })
            this.zr.add(line)
          }
        }
        
        if (el.extraArr && el.extraArr.length > 0) {
            el.extraArr.forEach((item,a) => {
              console.log(item);
              
              let x = this.getX(el.time)
              let y = this.transformY(el.value,cellSplit,cellMin)

              let lastY =  this.transformY(item.extra,cellSplit,cellMin)
              let dottedLine = createLine(x,y,x,lastY,{
                  stroke:data.color,
                  lineWidth:3,
                  lineDash:[2,2]
              })
              this.zr.add(dottedLine)

              el.extraArr.forEach((item,a) => {
                let getY = this.transformY(item.extra,cellSplit,cellMin)
                
                let Circle = createCircle(x,getY,this.CircleSize,{
                  stroke:item.extraColor,
                  fill:"#fff",
                })
                this.zr.add(Circle)
                addHover(Circle,{
                    tips:item.extraTips,
                },x,getY,{
                    r:this.hoverCircleSize,
                  },{
                    r:this.CircleSize,
                })
              })
            })
         }
        let getX = this.getX(el.time)
        let getY = this.transformY(el.value,cellSplit,cellMin)

        let Circle = createCircle(getX,getY,this.CircleSize,style)
        this.zr.add(Circle)
        addHover(Circle,el,getX,getY,{
            r:this.hoverCircleSize,
          },{
             r:this.CircleSize,
        })
      })
    },
    //多邊形
    zrPolyline(data){
      console.log(data);
      
      //最小值
      const cellMin = data.cellMin
      //座標軸每格代表值
      const cellSplit = data.cellSplit
      var points = []
      data.array.forEach((el,i) => {
        //生成圓點
        let cx = this.getX(el.time)
        let cy1 = this.transformY(el.v1,cellSplit,cellMin)
        let Circle1 = createCircle(cx,cy1,this.CircleSize,{
            stroke:data.color,
            fill:"#fff",
            text:"",
          })
        this.zr.add(Circle1)
        addHover(Circle1,{tips:el.v1Tips},cx,cy1,{
          r:this.hoverCircleSize,
        },{
            r:this.CircleSize,
        })

        let cy2 = this.transformY(el.v2,cellSplit,cellMin)
        let Circle2 = createCircle(cx,cy2,this.CircleSize,{
            stroke:data.color,
            fill:data.color,
            text:"",
          })
        this.zr.add(Circle2)
        
        addHover(Circle2,{tips:el.v2Tips},cx,cy2,{
          r:this.hoverCircleSize,
        },{
            r:this.CircleSize,
        })

        if (i > 0) {
          if (data.array[i-1].Break == "false") {
            points = []
            let pox1 = this.getX(data.array[i-1].time)
            let poy1 = this.transformY(data.array[i-1].v1,cellSplit,cellMin)
            let poy2 = this.transformY(data.array[i-1].v2,cellSplit,cellMin)
            
            let pox3 = this.getX(el.time)
            let poy3 = this.transformY(el.v1,cellSplit,cellMin)
            let poy4 = this.transformY(el.v2,cellSplit,cellMin)
            
            points.push([pox1,poy1],[pox1,poy2],[pox3,poy4],[pox3,poy3],[pox1,poy1])
            
            let area = createPolygon(points,{
              fill:data.bgColor,
              opacity:0.8,
              stroke:data.color
            })

            this.zr.add(area)
          }
        }
      })
      
    },
    zrTag(data){
      //最小值
      const cellMin = data.cellMin
      //座標軸每格代表值
      const cellSplit = data.cellSplit
      if (data.text == "R") {
        data.array.forEach((el,i) => {
          let x = this.getX(el.time)
          let y = this.transformY(el.value,cellSplit,cellMin)

          let Circle = createCircle(x,y,this.CircleSize,{
            text:data.text,
            fill:"#fff",
            stroke:data.color,
            textVerticalAlign:"middle",
            textAlign:"center",
          })
          this.zr.add(Circle)
          addHover(Circle,{tips:""},0,0,{
            r:this.hoverCircleSize,
          },{
            r:this.CircleSize,
          })
        })
      }
      if(data.text == "H"){
        data.array.forEach((el,i) => {
          let x = this.getX(el.time)
          let y = this.transformY(el.y,cellSplit,cellMin)

          let Circle = createCircle(x,y,this.CircleSize,{
            text:data.text,
            fill:"#fff",
            stroke:data.color,
            textVerticalAlign:"middle",
            textAlign:"center"
          })
          this.zr.add(Circle)
          addHover(Circle,{tips:""},0,0,{
            r:this.hoverCircleSize,
          },{
            r:this.CircleSize,
          })
        })
      }
    },

建立圖形是還需要寫幾個方法

用於獲取x軸小格子的寬度

y軸小格子寬度

以及每日時間變化後每個座標點的定位

 //每個x軸小格子寬度是多少
    XShareOne(data){
      let widthArr = [] //每格寬度 全部存入陣列
      var width = 0
      let YLineResetAll = []  //7天所有份數
      
      for (let i = 0; i < 7; i++) {
        YLineResetAll.push(...this.YLineReset)
      }
      
      for (let i = 0; i < parseInt(data); i++) {
          width = YLineResetAll[i].width + width
      }
        
      return width
    },
    //每個Y軸小格子寬度是多少
    YShareOne(){
      //計算大格子裡的每格小格子高度
      let childerHeight = this.canavsHeight/this.yLineLen.XRegion/this.yLineLen.XShare
      //計算大格高度
      let height = this.canavsHeight/this.yLineLen.XRegion
      return {height:height,childerHeight:childerHeight}
    },
    //轉換y軸座標點為正確座標點 因為y軸座標是頂點為0遞增的 所有用總高度減去原來座標的高度剩下的高度就是正確座標點
    //i代表一個格子代表幾個高度
    transformY(data,i,cellMin){
      let YHeight = this.YShareOne().height
      let YHeightChilder = this.YShareOne().childerHeight
      let xAll = this.yLineLen.XRegion  //一共多少個橫座標 大的
      let surplusHeight
      var cellAll = this.yLineLen.XRegion*this.yLineLen.XShare //一共多少個橫座標
      let index = cellMin
      var aIndex = 0
      let lastNumber = 0
      //總共佔幾格
      for (let a = 0; a < cellAll; a++) {
        //每格代表的值小於0的時候 需要特殊處理
        if (parseInt(i) == 0) {
          let floatNumber = this.getFloat(index,1)
          if (floatNumber <= this.getFloat(data,1)) {
            lastNumber = floatNumber
            aIndex = a
            surplusHeight = this.canavsHeight -this.getFloat(YHeightChilder,1)*a
          }
        }else{
          if (index <= data) {
            lastNumber = index
            aIndex = a
            surplusHeight = this.canavsHeight - YHeightChilder*a
          }
        }
        index = index+i
      }
      
      if (lastNumber-data < 0) {
        surplusHeight = surplusHeight -YHeightChilder/2
      }

      return surplusHeight
    },

transformY(data,i,cellMin)這個方法裡的邏輯比較複雜 後面我們在單獨講
下面是幾個基礎方法

resetY方法也是一個重點後面再講

    //獲取X座標 data當前時間點
    getX(data){
      let XShareOne = this.XShareOne(data)
      return XShareOne
    },
    //重置y軸座標間隔條數 傳入日期陣列 格式["1","3","4","5","6","18","21","24"]
    resetY(data){
      let oneYLinWidth = this.canavsWidth/this.xLineLen.day/this.xLineLen.time //每個時間點格子寬度
      let resetArr = [] //得到的新陣列
      
      data.forEach((item,i) => {
        if (i == 0) {
          for (let index = 0; index < item; index++) {
            resetArr.push({
              width:oneYLinWidth/2/item
            })
          }
        }else{
            let indexItem = item - data[i-1]
            for (let index = 0; index < indexItem; index++) {
              resetArr.push({
                width:oneYLinWidth/indexItem
              })
            }
           if (i+1 == data.length) {
             let indexItem = 24 - item
             for (let index = 0; index < indexItem; index++) {
                resetArr.push({
                width:oneYLinWidth/2/indexItem
              })
             }
           }
        }
      })
      return resetArr
    },
    getFloat(num,n){
      n = n ? parseInt(n) : 0;
      if(n <= 0) {
          return Math.round(num);
      }
      num = Math.round(num * Math.pow(10, n)) / Math.pow(10, n); //四捨五入
      num = Number(num).toFixed(n); //補足位數
      return num;
    },
    getCellHeight(){
      //yHeight Y軸每個小格子高度 xHeight X軸每個小格子寬度
      let xWidth = this.canavsWidth / this.xLineLen.day / this.xLineLen.time
      this.$emit('yHeight',this.YShareOne().height)
      this.$emit('xHeight',xWidth)
    },
    hoverLine(){
      var timer = null;
      let line = new zrender.Line({
          shape:{
              x1:0,
              y1:0,
              x2:0,
              y2:this.canavsHeight
          },
      })
      this.zr.add(line)
      
      hoverLine(this.zr,line,this.canavsHeight)
    }

<template>
  <div id="main">
  </div>
</template>

這是建立初始cavans需要用的

<style scoped>
  #main{
    height: 1250px;
    width: 100%;
    position: relative;
  }
  html,body{
    height: 100%;
    width: 100%;
    margin: 0;
    padding: 0;
  }
  canvas{
    width: 100%;
    height: 700px;
  }
</style>

然後是src/js/utli.js裡的各個方法

import zrender from "zrender"
import moment from 'moment';

//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 橫座標 cy縱座標 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
    })
}
//新增horver事件 el 元素物件 config 一些配置項 x x軸座標 y y軸座標 shapeOn滑鼠移入一些屬性配置 shapeOn滑鼠移出一些屬性配置 shape配置項看官網  
export const addHover = (el,config,x,y,shapeOn,shapeOut) => {
    const domTips = document.getElementsByClassName("tips")
    el.on('mouseover',function(){
        domTips[0].innerHTML = config.tips
        
        let textWidth = config.tips.length*15
        domTips[0].setAttribute("style",`position:absolute;top:${y-30}px;left:${x-textWidth/2}px;display:block;font-size:10px;background-color:rgba(0,0,0,.7);padding:3px 2px;border-radius:2px;color:#fff;width:${textWidth}px;text-align:center`)
        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
    })
}

export const hoverLine = (el,line,y2) => {
    window.onmousemove = function (e) {
        line.animateTo({
            shape:{
                x1:e.offsetX,
                y1:0,
                x2:e.offsetX,
                y2:y2
            }
        },50,0)
    }
}
//時間格式化
export const getFullTime = (i) => {
    return moment(i).format("YYYY-MM-DD HH:mm:ss");
}
//貝塞爾曲線
export const BezierCurve = (x1,y1,x2,y2,cpx1,cpy1,style) => {
    return new zrender.BezierCurve({
        shape:{
            x1:x1,
            y1:y1,
            x2:x2,
            y2:y2,
            cpx1:cpx1,
            cpy1:cpy1
        },
        style:style,
    });
}

這裡建立完成後畫板區域基本完成加上資料就能看見效果了

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