From e666ee8547ddfa936861903caa75ef785067e8dc Mon Sep 17 00:00:00 2001
From: aixianling <aixianling@sinoecare.com>
Date: Thu, 3 Mar 2022 17:11:05 +0800
Subject: [PATCH] =?UTF-8?q?=E4=BF=AE=E5=A4=8D=E5=BC=82=E5=B8=B8?=
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---
 src/mods/AppServiceOnlineNew/serviceForm.vue | 407 ++++++++++++++++++-
 1 file changed, 405 insertions(+), 2 deletions(-)

diff --git a/src/mods/AppServiceOnlineNew/serviceForm.vue b/src/mods/AppServiceOnlineNew/serviceForm.vue
index 1b6ffaa..5d62991 100644
--- a/src/mods/AppServiceOnlineNew/serviceForm.vue
+++ b/src/mods/AppServiceOnlineNew/serviceForm.vue
@@ -171,10 +171,10 @@
 </template>
 
 <script>
-import { mapState } from 'vuex'
-import Handwriting from '@/utils/signature.js'
+import {mapState} from 'vuex'
 
 export default {
+  name: "serviceForm",
   data() {
     return {
       pageShow: false,
@@ -495,6 +495,409 @@ export default {
       }
 
       if (this.isHasSignature && !this.signatureId) {
+        class Handwriting {
+          // 内置数据
+          ctx = '';
+          canvasWidth = 300;
+          canvasHeight = 900;
+          linePrack = []; //划线轨迹 ; 生成线条的实际点
+          currentLine = [];
+          transparent = 1; // 透明度
+          pressure = 0.5; // 默认压力
+          smoothness = 100; //顺滑度，用60的距离来计算速度
+          lineSize = 1.5; // 笔记倍数
+          lineMin = 0.5; // 最小笔画半径
+          lineMax = 2; // 最大笔画半径
+          currentPoint = {};
+          firstTouch = true; // 第一次触发
+          radius = 1; //画圆的半径
+          cutArea = {
+            top: 0,
+            right: 0,
+            bottom: 0,
+            left: 0
+          }; //裁剪区域
+          lastPoint = 0;
+          chirography = []; //笔迹
+          startY = 0;
+          deltaY = 0;
+          startValue = 0;
+
+          constructor(opts) {
+            console.log(opts);
+            this.lineColor = opts.lineColor || '#1A1A1A' // 颜色
+            this.slideValue = opts.slideValue || 50
+            this.canvasName = opts.canvasName || 'handWriting'
+            this.init()
+          }
+
+          init() {
+            this.ctx = uni.createCanvasContext(this.canvasName)
+            var query = uni.createSelectorQuery();
+            query.select('.handCenter').boundingClientRect(rect => {
+              console.log(rect)
+              this.canvasWidth = rect.width;
+              this.canvasHeight = rect.height;
+            }).exec();
+            this.selectSlideValue(this.slideValue);
+          }
+
+          // 笔迹开始
+          uploadScaleStart(event) {
+            console.log('start');
+            let e = event.mp
+            console.log(e.touches[0])
+            if (e.type != 'touchstart') return false;
+            this.ctx.setFillStyle(this.lineColor); // 初始线条设置颜色
+            this.ctx.setGlobalAlpha(this.transparent); // 设置半透明
+            this.currentPoint = {
+              x: e.touches[0].x,
+              y: e.touches[0].y
+            }
+            this.currentLine.unshift({
+              time: new Date().getTime(),
+              dis: 0,
+              x: this.currentPoint.x,
+              y: this.currentPoint.y
+            })
+            if (this.firstTouch) {
+              this.cutArea = {
+                top: this.currentPoint.y,
+                right: this.currentPoint.x,
+                bottom: this.currentPoint.y,
+                left: this.currentPoint.x
+              }
+              this.firstTouch = false
+            }
+            this.pointToLine(this.currentLine);
+          }
+
+          // 笔迹移动
+          uploadScaleMove(event) {
+            console.log('move');
+            let e = event.mp
+            if (e.type != 'touchmove') return false;
+            if (e.cancelable) {
+              // 判断默认行为是否已经被禁用
+              if (!e.defaultPrevented) {
+                e.preventDefault();
+              }
+            }
+            let point = {
+              x: e.touches[0].x,
+              y: e.touches[0].y
+            }
+            //测试裁剪
+            if (point.y < this.cutArea.top) {
+              this.cutArea.top = point.y;
+            }
+            if (point.y < 0) this.cutArea.top = 0;
+
+            if (point.x > this.cutArea.right) {
+              this.cutArea.right = point.x;
+            }
+            if (this.canvasWidth - point.x <= 0) {
+              this.cutArea.right = this.canvasWidth;
+            }
+            if (point.y > this.cutArea.bottom) {
+              this.cutArea.bottom = point.y;
+            }
+            if (this.canvasHeight - point.y <= 0) {
+              this.cutArea.bottom = this.canvasHeight;
+            }
+            if (point.x < this.cutArea.left) {
+              this.cutArea.left = point.x;
+            }
+            if (point.x < 0) this.cutArea.left = 0;
+
+            this.lastPoint = this.currentPoint;
+            this.currentPoint = point
+            this.currentLine.unshift({
+              time: new Date().getTime(),
+              dis: this.distance(this.currentPoint, this.lastPoint, 'move'),
+              x: point.x,
+              y: point.y
+            })
+            this.pointToLine(this.currentLine);
+          }
+
+          // 笔迹结束
+          uploadScaleEnd(event) {
+            let e = event.mp
+            if (e.type != 'touchend') return 0;
+            console.log(e);
+            let point = {
+              x: e.changedTouches[0].x,
+              y: e.changedTouches[0].y
+            }
+
+            this.lastPoint = this.currentPoint;
+            this.currentPoint = point
+            this.currentLine.unshift({
+              time: new Date().getTime(),
+              dis: this.distance(this.currentPoint, this.lastPoint, 'end'),
+              x: point.x,
+              y: point.y
+            })
+            if (this.currentLine.length > 2) {
+              var info = (this.currentLine[0].time - this.currentLine[this.currentLine.length - 1].time) / this.currentLine.length;
+              //$("#info").text(info.toFixed(2));
+            }
+            //一笔结束，保存笔迹的坐标点，清空，当前笔迹
+            //增加判断是否在手写区域；
+            this.pointToLine(this.currentLine);
+            var currentChirography = {
+              lineSize: this.lineSize,
+              lineColor: this.lineColor
+            };
+            this.chirography.unshift(currentChirography);
+            this.linePrack.unshift(this.currentLine);
+            this.currentLine = []
+          }
+
+          retDraw() {
+            this.ctx.clearRect(0, 0, 700, 730)
+            this.ctx.draw()
+          }
+
+          //画两点之间的线条；参数为:line，会绘制最近的开始的两个点；
+          pointToLine(line) {
+            this.calcBethelLine(line);
+            // this.calcBethelLine1(line);
+            return;
+          }
+
+          //计算插值的方式；
+          calcBethelLine(line) {
+            if (line.length <= 1) {
+              line[0].r = this.radius;
+              return;
+            }
+            let x0, x1, x2, y0, y1, y2, r0, r1, r2, len, lastRadius, dis = 0,
+                time = 0,
+                curveValue = 0.5;
+            if (line.length <= 2) {
+              x0 = line[1].x
+              y0 = line[1].y
+              x2 = line[1].x + (line[0].x - line[1].x) * curveValue;
+              y2 = line[1].y + (line[0].y - line[1].y) * curveValue;
+              //x2 = line[1].x;
+              //y2 = line[1].y;
+              x1 = x0 + (x2 - x0) * curveValue;
+              y1 = y0 + (y2 - y0) * curveValue;
+              ;
+
+            } else {
+              x0 = line[2].x + (line[1].x - line[2].x) * curveValue;
+              y0 = line[2].y + (line[1].y - line[2].y) * curveValue;
+              x1 = line[1].x;
+              y1 = line[1].y;
+              x2 = x1 + (line[0].x - x1) * curveValue;
+              y2 = y1 + (line[0].y - y1) * curveValue;
+            }
+            //从计算公式看，三个点分别是(x0,y0),(x1,y1),(x2,y2) ；(x1,y1)这个是控制点，控制点不会落在曲线上；实际上，这个点还会手写获取的实际点，却落在曲线上
+            len = this.distance({
+              x: x2,
+              y: y2
+            }, {
+              x: x0,
+              y: y0
+            }, 'calc');
+            lastRadius = this.radius;
+            for (let n = 0; n < line.length - 1; n++) {
+              dis += line[n].dis;
+              time += line[n].time - line[n + 1].time;
+              if (dis > this.smoothness) break;
+            }
+            this.radius = Math.min(time / len * this.pressure + this.lineMin, this.lineMax) * this.lineSize
+            line[0].r = this.radius;
+            //计算笔迹半径；
+            if (line.length <= 2) {
+              r0 = (lastRadius + this.radius) / 2;
+              r1 = r0;
+              r2 = r1;
+              //return;
+            } else {
+              r0 = (line[2].r + line[1].r) / 2;
+              r1 = line[1].r;
+              r2 = (line[1].r + line[0].r) / 2;
+            }
+            let n = 5;
+            let point = [];
+            for (let i = 0; i < n; i++) {
+              let t = i / (n - 1);
+              let x = (1 - t) * (1 - t) * x0 + 2 * t * (1 - t) * x1 + t * t * x2;
+              let y = (1 - t) * (1 - t) * y0 + 2 * t * (1 - t) * y1 + t * t * y2;
+              let r = lastRadius + (this.radius - lastRadius) / n * i;
+              point.push({
+                x: x,
+                y: y,
+                r: r
+              });
+              if (point.length == 3) {
+                let a = this.ctaCalc(point[0].x, point[0].y, point[0].r, point[1].x, point[1].y, point[1].r, point[2].x, point[2].y, point[2].r);
+                a[0].color = this.lineColor;
+                this.bethelDraw(a, 1);
+                point = [{
+                  x: x,
+                  y: y,
+                  r: r
+                }];
+              }
+            }
+          }
+
+          //求两点之间距离
+          distance(a, b, type) {
+            let x = b.x - a.x;
+            let y = b.y - a.y;
+            return Math.sqrt(x * x + y * y) * 5;
+          }
+
+          ctaCalc(x0, y0, r0, x1, y1, r1, x2, y2, r2) {
+            let a = [],
+                vx01, vy01, norm, n_x0, n_y0, vx21, vy21, n_x2, n_y2;
+            vx01 = x1 - x0;
+            vy01 = y1 - y0;
+            norm = Math.sqrt(vx01 * vx01 + vy01 * vy01 + 0.0001) * 2;
+            vx01 = vx01 / norm * r0;
+            vy01 = vy01 / norm * r0;
+            n_x0 = vy01;
+            n_y0 = -vx01;
+            vx21 = x1 - x2;
+            vy21 = y1 - y2;
+            norm = Math.sqrt(vx21 * vx21 + vy21 * vy21 + 0.0001) * 2;
+            vx21 = vx21 / norm * r2;
+            vy21 = vy21 / norm * r2;
+            n_x2 = -vy21;
+            n_y2 = vx21;
+            a.push({
+              mx: x0 + n_x0,
+              my: y0 + n_y0,
+              color: "#1A1A1A"
+            });
+            a.push({
+              c1x: x1 + n_x0,
+              c1y: y1 + n_y0,
+              c2x: x1 + n_x2,
+              c2y: y1 + n_y2,
+              ex: x2 + n_x2,
+              ey: y2 + n_y2
+            });
+            a.push({
+              c1x: x2 + n_x2 - vx21,
+              c1y: y2 + n_y2 - vy21,
+              c2x: x2 - n_x2 - vx21,
+              c2y: y2 - n_y2 - vy21,
+              ex: x2 - n_x2,
+              ey: y2 - n_y2
+            });
+            a.push({
+              c1x: x1 - n_x2,
+              c1y: y1 - n_y2,
+              c2x: x1 - n_x0,
+              c2y: y1 - n_y0,
+              ex: x0 - n_x0,
+              ey: y0 - n_y0
+            });
+            a.push({
+              c1x: x0 - n_x0 - vx01,
+              c1y: y0 - n_y0 - vy01,
+              c2x: x0 + n_x0 - vx01,
+              c2y: y0 + n_y0 - vy01,
+              ex: x0 + n_x0,
+              ey: y0 + n_y0
+            });
+            a[0].mx = a[0].mx.toFixed(1);
+            a[0].mx = parseFloat(a[0].mx);
+            a[0].my = a[0].my.toFixed(1);
+            a[0].my = parseFloat(a[0].my);
+            for (let i = 1; i < a.length; i++) {
+              a[i].c1x = a[i].c1x.toFixed(1);
+              a[i].c1x = parseFloat(a[i].c1x);
+              a[i].c1y = a[i].c1y.toFixed(1);
+              a[i].c1y = parseFloat(a[i].c1y);
+              a[i].c2x = a[i].c2x.toFixed(1);
+              a[i].c2x = parseFloat(a[i].c2x);
+              a[i].c2y = a[i].c2y.toFixed(1);
+              a[i].c2y = parseFloat(a[i].c2y);
+              a[i].ex = a[i].ex.toFixed(1);
+              a[i].ex = parseFloat(a[i].ex);
+              a[i].ey = a[i].ey.toFixed(1);
+              a[i].ey = parseFloat(a[i].ey);
+            }
+            return a;
+          }
+
+          bethelDraw(point, is_fill, color) {
+            this.ctx.beginPath();
+            this.ctx.moveTo(point[0].mx, point[0].my);
+            if (undefined != color) {
+              this.ctx.setFillStyle(color);
+              this.ctx.setStrokeStyle(color);
+            } else {
+              this.ctx.setFillStyle(point[0].color);
+              this.ctx.setStrokeStyle(point[0].color);
+            }
+            for (let i = 1; i < point.length; i++) {
+              this.ctx.bezierCurveTo(point[i].c1x, point[i].c1y, point[i].c2x, point[i].c2y, point[i].ex, point[i].ey);
+            }
+            this.ctx.stroke();
+            if (undefined != is_fill) {
+              this.ctx.fill(); //填充图形 ( 后绘制的图形会覆盖前面的图形, 绘制时注意先后顺序 )
+            }
+            this.ctx.draw(true)
+          }
+
+          selectColorEvent(lineColor) {
+            this.lineColor = lineColor;
+          }
+
+          selectSlideValue(slideValue) {
+            switch (slideValue) {
+              case 0:
+                this.lineSize = 0.1;
+                this.lineMin = 0.1;
+                this.lineMax = 0.1;
+                break;
+              case 25:
+                this.lineSize = 1;
+                this.lineMin = 0.5;
+                this.lineMax = 2;
+                break;
+              case 50:
+                this.lineSize = 1.5;
+                this.lineMin = 1;
+                this.lineMax = 3;
+                break;
+              case 75:
+                this.lineSize = 1.5;
+                this.lineMin = 2;
+                this.lineMax = 3.5;
+                break;
+              case 100:
+                this.lineSize = 3;
+                this.lineMin = 2;
+                this.lineMax = 3.5;
+                break;
+            }
+          }
+
+          saveCanvas() {
+            return new Promise((resolve, rej) => {
+              uni.canvasToTempFilePath({
+                canvasId: this.canvasName,
+                success: function (res) {
+                  resolve(res.tempFilePath);
+                },
+                fail: function (err) {
+                  rej(err);
+                }
+              })
+            })
+          }
+        }
+
         this.handwriting = new Handwriting({
           lineColor: this.lineColor,
           slideValue: this.slideValue,