epc/pages/mobile/epcSimpleDetailOne.vue

<template>
	<view class="box">
		
		<view class="zdyNavBox">
			<view class="status_bar" :style="{height: iStatusBarHeight + 'px'}"></view>
			<view class="zdyNav">
				<!-- <view class="zdyNavLeft">
					<div @click="goback" class="uni-page-head-btn"><i class="uni-btn-icon"
							style="color: rgb(0, 0, 0); font-size: 27px;"></i></div>
				</view>
				<view class="xx" style="position: absolute;left:100rpx;color: black;font-size: 23px;" @click="goToSelectCarModel">X</view> -->
				<view class="zdyNavLeft">
					<div @click="goback" class="uni-page-head-btn"><i class="uni-btn-icon"
							style="color: #333333; font-size: 27px;" ></i></div>
				
				</view>
				<view class="xx" style="margin-left: -70rpx;" @click="goToSelectCarModel">
					<image src="/static/img/group2.png" style="width: 27rpx;height: 27rpx;"></image>
				</view>
				<view class="tab-box" @click="changeIsShow()">
					<view class="title">{{chlildObj.title}}</view>
					<view class="sanjiao" v-if="isShowAll == 1">▲</view>
					<view class="sanjiao" :class="{shangjian:isShowAll == 0}" v-if="isShowAll == 0">▼</view>
				</view>
				<!-- <view class="zdyNavTitle" @click="changeIsShow()">
					<view class="title">{{chlildObj.title}}</view>
					<view class="sanjiao" v-if="isShowAll == 1">▲</view>
					<view class="sanjiao" v-if="isShowAll == 0">▼</view>
				</view> -->
				<view  style="width: 120rpx;"></view>
				
			</view>
			<view class="title-box" v-if="isShowAll == 1" style="z-index: 999;">
				<view class="item" v-for="(item,index) in allChildrenObj" :key="index" @click="clickTitle(item)">
					<view class="item-image">
						<image :src="item.image" mode="aspectFit" style="width: 100%;height: 180rpx;"></image>
					</view>
					<view class="item-title" >
						{{item.title}}
					</view>
				</view>
				<view v-if="isShowAll == 1" style="height: 100vh;;z-index: 998;" @click="closeTitleTab()"></view>
				<view v-if="isShowAll == 1" style="height: 100vh;;z-index: 998;" @click="closeTitleTab()"></view>
				<view v-if="isShowAll == 1" style="height: 100vh;;z-index: 998;" @click="closeTitleTab()"></view>
			</view>
			
		</view>
		
		<view class="box-image-big" v-if="showType == 0">
			<view class="image-big">
			    <image :src="chlildObj.image" mode="aspectFit" style="width: 100%;height: 80vh"></image>
			    <canvas canvas-id="big-this-image" class="drawing-canvas" id="big-this-image" type="2d" 
			        @touchstart="handleTouchStartBig" 
			        @touchmove="handleTouchMoveBig" 
			        @touchend="handleTouchEndBig"></canvas>
			</view>
			<view class="box-btn">
				<view class="leftBtn" @click="getOther(-1)"><</view>
				<view class="rightBtn"@click="getOther(1)">></view>
			</view>
			
			
		</view>
		<view class="box-image-small" v-if="showType == 1" @tap="handleImageClick">
			<view class="small-image" >
				<image class="small-this-image"  :src="chlildObj.image" mode="aspectFill" ></image>
				     <!-- Canvas遮罩层 -->
				     <canvas 
				          canvas-id="mask-canvas" 
				          class="mask-canvas"
				          :style="{
				            position: 'absolute', 
				            top: 0, 
				            left: 0, 
				            width: '100%', 
				            height: '100%', 
				            zIndex: 1, 
				            pointerEvents: 'none'
				          }"
				        ></canvas>
			</view>
		</view>

		<view class="box-jiantou">
			<view class="jian-span " :class="{'jian-down':isRotated}" @click="changeIsRotated()">》</view>
		</view>
		<view class="box-lab">
			<scroll-view scroll-x=true enable-flex=true show-scrollbar=false class="box-lab-scr" style="white-space: nowrap;height: 90rpx;" :scroll-into-view="scrollIntoId">
				<view class="lab-titles" :class="{'clickLab':labtitile==index}" :id="'item-' + index" @click="labTitile(item,index)" v-for="(item,index) in chlildObj.children" :key="index">
					{{item.title}}
				</view>
			</scroll-view>
			
		</view>
		<view class="lab-grid" v-if="showType == 1">
			<view class="lab-child" v-for="(item,index) in labChildObj" :key="index" @click="labChildClick(item)">
				<view class="lab-child-image">
					<image :src="item.image" mode="aspectFit" style="width: 160rpx;height: 150rpx;"></image>
				</view>
				<view class="lab-child-title">
					{{item.title}}
				</view>
			</view>
		</view>
		
		
	</view>
</template>

<script>
	export default {
		data() {
			return {
				toke:"",
				param:"",
				access_time:"",
				epc_id:"",
				brand_id:"",
				iStatusBarHeight: '',
				chlildObj:null,
				allChildrenObj:null,
				isShowAll:0,
				isRotated: false,
				labtitile: 0,
				labChildObj:null,
				showType:0, //0大图1小图
				ctxBig: null, //大画布
				pointsBig: [],        // 存储所有点的坐标数组
				isDrawingBig: false,  // 是否正在绘制的标志
				currentPathBig: [],   // 当前路径的点数组
				ctxMask: null, //小画布
				pointsSmall: [],        // 存储所有点的坐标数组
				isDrawingSmall: false,  // 是否正在绘制的标志
				currentPathSmall: [],   // 当前路径的点数组
				hitChild:[],//圈选中对象
				thisWidth: 0,//当前屏幕宽度
				scrollIntoId: '', //工东严肃定位
				
				specifiedAreas: [], //预定义位置
				unmaskAreas: [], // 已取消遮罩的区域
				unmaskSize: 80,
				
				brand_name:'',
				caption:'',
				vin:'',
				imageicon:'',
				modelname:'',
				 isReturningFromChild: false,
			}
		},
		onLoad(opt) {
			this.iStatusBarHeight = uni.getSystemInfoSync().statusBarHeight;
			//当前对象
			this.chlildObj = uni.getStorageSync('epcChildren');
			//全部对象
			this.allChildrenObj = uni.getStorageSync('epcAllChildren');
			//当前详细
			this.labChildObj = this.chlildObj.children[this.labtitile].children;
			this.token = opt.token;
			this.param = opt.param;
			this.access_time = opt.access_time;
			this.epc_id = opt.epc_id;
			this.brand_id = opt.brand_id;
			this.brand_name = opt.brand_name;
			this.caption = opt.caption;
			this.vin = opt.vin;
			this.imageicon = opt.imageicon;
			this.modelname = opt.modelname;
			this.getSmileDate();
			this.initCanvas();
		},
		// onReady(){ 
		// 	this.initCanvas();
			
		// },
		// onShow() {
			
		// },
		methods: {
			goback() {
				uni.navigateBack({})
			},
			//返回选品牌
			goToSelectCarModel(){
				let vin = this.vin;
				if(vin ==undefined || vin =='' ||vin == 'undefined' ){
					uni.navigateTo({url:'SelectCarModel'});
				}else{
					uni.navigateTo({url:'index'});
				}
			},
			//标题title点击事件
			changeIsShow(){
				this.isShowAll = this.isShowAll == 0 ? 1 : 0;
			},
			//上下箭头点击事件
			changeIsRotated(){
				this.isRotated = !this.isRotated;
				this.showType = this.isRotated ? 1:0;
				
				if (this.showType == 1) {
					this.$nextTick(() => {
					  this.initSpecifiedAreasPush();
					});
				  }else{
					this.clearUnmaskAreas()
				  }
			},
			//左右按钮点击
			getOther(typeNum){
				//获取顺序
				let index = 0;
				for (var i = 0; i < this.allChildrenObj.length; i++) {
					let item = this.allChildrenObj[i]
					if (item.id == this.chlildObj.id){
						index = i;
					}
				}
				if(typeNum ==-1){
					index =  index-1 < 0 ?  this.allChildrenObj.length-1 : index-1 ;
				}else{
					index = index+1 > this.allChildrenObj.length-1 ?  0 : index+1 ;
				}
				this.chlildObj = this.allChildrenObj[index];
				this.labChildObj = this.chlildObj.children[index].children;
				
			},
			//标题下拉图片点击
			clickTitle(item){
				this.chlildObj = item;
				this.isShowAll = 0;
				this.showType = 0;
				this.initCanvas();
				this.getSmileDate();
				this.initSpecifiedAreasPush();
			},
			//labtitiel的点击事件
			labTitile(item,index){
				this.showType = 1;
				this.isRotated = true;
				this.labtitile = index;
				this.labChildObj = this.chlildObj.children[this.labtitile].children;
				this.scrollIntoId = 'item-' + index;
				//set 小图坐标
				//this.specifiedAreasPush(item);
				//延时等待渲染效果
				setTimeout(()=>{
					this.initSpecifiedAreasPush();
				},100)
				
			},
			//下布局grid点击图片事件
			labChildClick(item){
				
				var that = this;
				console.log(item);
				let url = "/simpleEpc/getCustomDetail";
				let data = {
					brand_id : this.brand_id,
					epc_id : this.epc_id,
					custom_id : item.id,
					token : this.token,
					access_time : this.access_time,
					param : this.param,
					vin:''
					
				};
				// let data = {
				// 	brand_id : this.brand_id,
				// 	epc_id : this.epc_id,
				// 	pid:item.id
					
				// };
				let res = this.textJieKou(url,data);
				res.then(response =>{
					let number = response.data.number;
					if(number != 200 ){
						uni.navigateTo({
							url: 'SimpleOemSearch?brand=' + undefined + '&token=' + this.token + '&param=' +
								this.param + '&access_time=' + this.access_time + '&title=' + item.title+'&epc_id='+this.epc_id+"&brand_name="+this.brand_name
								+"&caption="+this.caption
						})
						return;
					}
					
					let data = response.data.result.data.list;
					if(data.length > 1){//跳子组页
						uni.navigateTo({
							url: 'modelTwoSimple?brand=' + undefined + '&token=' + this.token + '&param=' +
								this.param + '&zzTime=' + this.access_time + '&title=' + item.title+'&epc_id='+this.epc_id+"&brand_name="+this.brand_name
								+"&caption="+this.caption
						})
					}else if(data.length == 1){//跳配件展示页
						uni.navigateTo({
							url: 'vinDetail?brand=' + undefined + '&token=' + data[0].token + '&param=' +
								data[0].param + '&access_time=' + response.data.result.data.access_time + '&title=' + item.title+'&epc_id='+this.epc_id+"&brand_name="+this.brand_name
								+"&tabIndex=0"
						})
					}
				})
				
				
			},
			//关闭title 下拉
			closeTitleTab(){
				this.isShowAll = 0;
			},
			//初始化画布
			initCanvas(){
				console.log("画布初始化");
				this.ctxBig = uni.createCanvasContext('big-this-image',this);
				//this.ctxSmall = uni.createCanvasContext('small-this-image',this);
				
				this.ctxMask = uni.createCanvasContext('mask-canvas', this);
				
				// 设置线条颜色
				this.ctxBig.setStrokeStyle("red");
				// 设置线宽
				this.ctxBig.setLineWidth(5);
				// 设置线条末端为圆形
				this.ctxBig.setLineCap("round");
				// 设置线条连接处为圆形
				this.ctxBig.setLineJoin("round");
				this.ctxBig.setLineDash([]); // 确保不是虚线
				 // 设置更高的绘制质量
				this.ctxBig.setGlobalAlpha(1);
				this.ctxBig.setShadow(0, 0, 0, 'transparent'); // 清除阴影避免性能问题	
				
				
				this.drawFullMask();
			},
			//小图遮罩初始化显示 正前
			initSpecifiedAreasPush(){
				let id = 0;
				//获取这是第几个labtitle
				const element = document.querySelector('.clickLab');
				if (element) {
					id =  element.id.split("-")[1];
				}
				
				let tetxx = this.chlildObj.children[id].title;
				let  isAreas = {"title":tetxx};
				this.specifiedAreasPush(isAreas);
			},
			// 处理触摸开始事件
			handleTouchStartBig(e) {
			  // 获取触摸点的x,y坐标
			  const x = e.touches[0].x;
			  const y = e.touches[0].y;
			  
			  // 设置正在绘制标志
			  this.isDrawingBig = true;
			  // 初始化当前路径数组，并添加第一个点
			  this.currentPathBig = [{x, y}];
			  
			  // 开始新路径
			  this.ctxBig.beginPath();
			  // 移动画笔到起始点
			  this.ctxBig.moveTo(x, y);
			},
			// 处理触摸移动事件
			handleTouchMoveBig(e) {
			  // 如果不是绘制状态则返回
			  if (!this.isDrawingBig) return;
			  
			  // 获取当前触摸点的坐标
			  const x = e.touches[0].x;
			  const y = e.touches[0].y;
			  
			  // 将当前点添加到当前路径数组
			  this.currentPathBig.push({x, y});
			  
			   // 当有足够点数时使用贝塞尔曲线
			    if (this.currentPathBig.length >= 3) {
			      this.drawSmoothLine();
			    } else {
			      this.drawStraightLine();
			    }
			},
			// 绘制平滑曲线
			drawSmoothLine() {
			  const points = this.currentPathBig;
			  const len = points.length;
			  
			  if (len < 3) return;
			  
			  this.ctxBig.beginPath();
			  this.ctxBig.moveTo(points[0].x, points[0].y);
			  
			  // 使用二次贝塞尔曲线平滑连接
			  for (let i = 1; i < len - 2; i++) {
			    const controlX = (points[i].x + points[i + 1].x) / 2;
			    const controlY = (points[i].y + points[i + 1].y) / 2;
			    this.ctxBig.quadraticCurveTo(points[i].x, points[i].y, controlX, controlY);
			  }
			  
			  // 处理最后两个点
			  if (len >= 3) {
			    this.ctxBig.quadraticCurveTo(
			      points[len - 2].x, 
			      points[len - 2].y, 
			      points[len - 1].x, 
			      points[len - 1].y
			    );
			  }
			  
			  this.ctxBig.stroke();
			  this.ctxBig.draw(true);
			},
			
			// 绘制直线（点数不足时）
			drawStraightLine() {
			  if (this.currentPathBig.length < 2) return;
			  
			  this.ctxBig.beginPath();
			  this.ctxBig.moveTo(this.currentPathBig[0].x, this.currentPathBig[0].y);
			  this.ctxBig.lineTo(this.currentPathBig[1].x, this.currentPathBig[1].y);
			  this.ctxBig.stroke();
			  this.ctxBig.draw(true);
			},
			 // 处理触摸结束事件
			handleTouchEndBig() {
			  // 如果不是绘制状态则返回
			  if (!this.isDrawingBig) return;
			  
			  // 将当前路径的所有点合并到总点数组中
			  this.pointsBig = [...this.pointsBig, ...this.currentPathBig];
			  // 清空当前路径
			  //this.currentPathBig = [];
			  // 重置绘制状态 
			  this.isDrawingBig = false;
			  //清空圈选对象
			  this.hitChild = [];
			  setTimeout(()=>{
				  const width = this.ctxBig.width || 1024;  // 如果没有设置width属性，使用默认值
				  const height = this.ctxBig.height || 1024;
				 this.ctxBig.clearRect(0,0,width,height);
				 this.ctxBig.draw(true);
				 this.isDrawingBig = true;
				 this.toDetailByCanvas();
			  },400)
			},
			//筛选圈选的位置
			toDetailByCanvas(){
				//坐标集合
				let zuobiao = this.currentPathBig,
				//当前对象
				chlildObj = this.labChildObj;
				//击中对象
				const oneSet = new Set();
				let isgo =false;
				zuobiao.forEach(x =>{
					//判断当前坐标是否在当前位置
					this.ifClickObj(x.x,x.y);
					//判断是否跳转
					if(this.isGoTwo()){
						//跳转
						uni.removeStorageSync('epcChildrenTwo');
						uni.setStorageSync('epcChildrenTwo', this.hitChild); 
						isgo =true;
					}
				})
				if(isgo){
					uni.navigateTo({
						url: 'epcSimpleDetailTwo?token='+this.token+'&param='+this.param+'&access_time='+this.access_time+'&epc_id='+this.epc_id+"&title="+this.chlildObj.title
						+'&brand_id='+this.brand_id+"&brand_name="+this.brand_name+"&caption="+this.caption+"&vin="+this.vin
					})
				}
			},
			isGoTwo(){
				if (this.hitChild.length === 0) {
				    return false;
				} else {
				    return this.hitChild.some(x => x.children.length > 0);
				}
			},
			/**
			 * @param {Object} x
			 * @param {Object} y
			 * 要遍历多次，第一次为外面的大类确定
			 * 第二次为大类里面的包含的小件
			 */
			//根据坐标判断是否击中集合
			ifClickObj(x,y){
				
				let isDelete = 0;
				let chlildObj = this.chlildObj; //顶级对象
				this.thisWidth = uni.getSystemInfoSync().screenWidth;
				chlildObj.children.forEach(item => {
					let item_width = item.width,
					 item_top = item.top,
					 item_left = item.left,
					 item_height = item.height,
					 image_width = chlildObj.width,
					 image_height = chlildObj.height;
					 
					 //计算实际坐标
					 let x1 = 0,//x头
						x2 = 0,//x尾
						y1 = 0,//y头
						y2 = 0;//y尾
					x1 = this.pxToX(item_left,image_width);
					x2 = x1+this.pxToX(item_width,image_width);
					y1 =this.pxToY(item_top,image_width,image_height);
					y2 = y1+this.pxToY(item_height,image_width,image_height);
					//命中父级组件
					if(x>x1 && x<x2 && y>y1 && y<y2){
						let childrenParent = this.hitChild.find(x1 => x1.title === item.title);
						if(childrenParent==undefined || childrenParent.length == ""  ){
							childrenParent = {
								"id":item.id,
								"children":[],
								"image":item.image,
								"pid":item.pid,
								"title":item.title,
								"is_visible":item.is_visible,
								"height":item.height,
								"top":item.top,
								"left":item.left,
								"width":item.width
							};
							this.hitChild.push(childrenParent);
						}
						
						//判断命中小组建
						item.children.forEach(childItem =>{
							let child_width = childItem.width,
								child_top = childItem.top,
								child_left = childItem.left,
								child_height = childItem.height,
								child_x = 0,
								child_x2 = 0,
								child_y = 0,
								child_y2 = 0;
							child_x = this.pxToX(child_width,image_width);
							child_x2 = child_x+this.pxToX(child_width,image_width);
							child_y = this.pxToY(child_top,image_width,image_height);
							child_y2 = child_y+this.pxToY(child_height,image_width,image_height);
							//命中小组件
							if(x>child_x && x<child_x2 && y>child_y && y<child_y2){
								//判断是否存在
								let hitchilditem = childrenParent.children.find(mm => mm.title === childItem.title);
								if(hitchilditem == undefined || hitchilditem == ""){
									childrenParent.children.push(childItem);
								}
								
							}
						})
						
					}
				})
			},
			/**
			 * 像素等比例转换X轴
			 * @param {Object} px 标记像素
			 * @param {Object} widch 图片宽度
			 */
			pxToX(px,width){
				let pxx =  Math.floor((px / width) * this.thisWidth);
				return pxx;
			},
			/**
			 * 像素等比例转换Y轴
			 * @param {Object} px 标记像素
			 * @param {Object} height 图片高度
			 */
			pxToY(px,width,height){
				//计算等比例高度
				const scaledHeight = (this.thisWidth / width) * height;
				let pxx =  Math.floor(( px/ height) * scaledHeight);
				return pxx;
				
			},
			
			// 清除所有取消遮罩的区域
			getSmileDate(){
				this.chlildObj.children.forEach(item => {
					let chlildObj = this.chlildObj;
					let item_width = item.width,
					 item_top = item.top,
					 item_left = item.left,
					 item_height = item.height,
					 image_width = chlildObj.width,
					 image_height = chlildObj.height;
					let x1 = 0,
						x2 = 0,
						y1 = 0,
						y2 = 0;
						
					let oldx = item_left,
						oldy = item_top,
						oldx2 = item_width*1,
						oldy2 = item_height*1;
						
						x1 = oldy*1;
						x2 = oldy*1 + oldy2*1;
						y1 = image_width*1 - oldx*1;
						y2 = image_width*1 - oldx*1 - oldx2*1;
						
					// y1 = item_left;
					// x1 = item_top;
					// y2 = item_left*1 + item_width*1;
					// x2 = item_top*1 + item_height*1;
					
					let zb1 = this.shuToHeng(image_width,image_height,x1,y1);
					let zb2 = this.shuToHeng(image_width,image_height,x2,y2);
					this.specifiedAreas.push({
						"x1":zb1.x,"y1":zb1.y,"x2":zb2.x,"y2":zb2.y,id:'area'+item.title
					})
				})
				
			},
			//push 取消遮罩
			specifiedAreasPush(item){
				let allAreas = this.specifiedAreas;
				//获取tab坐标
				let  isAreas = allAreas.find(x => x.id == "area"+item.title);
				this.unmaskAreas = [];
				this.unmaskAreas.push({
				  id: isAreas.id,
				  x1: isAreas.x1,
				  y1: isAreas.y1,
				  x2: isAreas.x2,
				  y2: isAreas.y2,
				  radius: this.unmaskSize/2
				});
				// 重绘Canvas遮罩
				this.updateMaskCanvas();
			},
			//计算横置小图的坐标,竖坐标转化成横坐标，宽高也改变了
			/**
			 * @param {Object} width 图片宽度
			 * @param {Object} height 图片高度
			 * @param {Object} x 坐标
			 * @param {Object} y 坐标
			 * @param {Object} thisWidth 当前屏幕宽度
			 */
			shuToHeng(width,height,x,y){
				//转换后的宽度
				let thisWidth = uni.getSystemInfoSync().screenWidth;
				//选装的高度
				let thisHeight =  (thisWidth / height) * width;
				//旋转后的y轴
				let pxy =  Math.floor(( y/ width) * thisHeight);
				//旋转后的X轴
				let pxx =  Math.floor((x / height) * thisWidth);
				return {"x":pxx,"y":pxy};
			},
			//start
			 handleImageClick(event) {
			    const query = uni.createSelectorQuery().in(this);
			    query.select('.small-image').boundingClientRect(data => {
			      if (data) {
			        const clickX = event.touches[0].clientX - data.left;
			        const clickY = event.touches[0].clientY - data.top;
			        // 检查是否点击在指定区域内
			        const hitArea = this.checkClickInSpecifiedArea(clickX, clickY);
			        if (hitArea) {
			          // 如果点击在指定区域内，取消该区域遮罩
			          this.addUnmaskArea(hitArea, clickX, clickY);
			        }
			      }
			    }).exec();
			    
			  },
			  
			   // 检查点击是否在指定区域内
			    checkClickInSpecifiedArea(clickX, clickY) {
					
			      for (let area of this.specifiedAreas) {
			        // 检查点击坐标是否在区域内
			        if (clickX >= area.x1 && 
			            clickX <= area.x2  && 
			            clickY >= area.y2 && 
			            clickY <= area.y1) {
			          return area;
			        }
			      }
			      return null;
			    },

				// 添加取消遮罩区域
				addUnmaskArea(area, x, y) {
				    const exists = this.unmaskAreas.some(item => item.id === area.id);
				    if (!exists) {
					  this.unmaskAreas = [];
				      this.unmaskAreas.push({
				        id: area.id,
				        x1: area.x1,
				        y1: area.y1,
						x2: area.x2,
						y2: area.y2,
				        radius: this.unmaskSize/2
				      });
				      //lab标题获取焦点
					  let childrenFor = this.chlildObj.children;
					  let index = 0;
					  for (var i = 0; i < childrenFor.length; i++) {
					  	 let item = childrenFor[i];
						 if(item.title == area.id.split("area")[1]){
							 index = i;
							 this.labTitile(item,i);
						 }
					  }
				    }
				},
				  
				// 更新Canvas遮罩
				updateMaskCanvas() {
					
				    const ctx = this.ctxMask;
					// 1. 清除画布（动态获取尺寸）
				   const { windowWidth, windowHeight } = uni.getSystemInfoSync();
				   ctx.clearRect(0, 0, windowWidth, windowHeight);
				   
				   // 2. 绘制全屏半透明遮罩
				   ctx.setFillStyle('rgba(255, 255, 255, 0.5)');
				   ctx.fillRect(0, 0, windowWidth, windowHeight);
				   
				   // 3. 关键！设置合成模式为“擦除”
				   ctx.globalCompositeOperation = 'destination-out';
				   ctx.setFillStyle('rgba(0, 0, 0, 1)'); // 颜色不重要，alpha通道生效
				   
				   // 4. 绘制取消遮罩的区域（矩形示例）
				   this.unmaskAreas.forEach(area => {
				     ctx.beginPath();
				     ctx.moveTo(area.x1, area.y1);
				     ctx.lineTo(area.x2, area.y1);
				     ctx.lineTo(area.x2, area.y2);
				     ctx.lineTo(area.x1, area.y2);
				     ctx.closePath();
				     ctx.fill();
				   });
				   
				   // 5. 恢复默认合成模式
				   ctx.globalCompositeOperation = 'source-over';
				   
				   // 6. 提交绘制（微信小程序需调用 draw）
				   ctx.draw(true); // 注意：微信小程序中需传 true 表示异步绘制
				  },
				  // 清除所有取消遮罩的区域
				  clearUnmaskAreas() {
				    this.unmaskAreas = [];
				    const ctx = this.ctxMask;
					const { windowWidth, windowHeight } = uni.getSystemInfoSync();
					// 1. 清除画布（使用实际尺寸）
					ctx.clearRect(0, 0, windowWidth * 2, windowHeight * 2); // 考虑retina屏幕
					ctx.draw(false, () => {
						uni.hideLoading(); // 如果之前有loading可以隐藏
					});
				  },

				// 绘制全屏遮罩
				drawFullMask() {
				  const ctx = this.ctxMask;
					
				  // 获取实际屏幕尺寸（更精确的方式）
				  const { windowWidth, windowHeight } = uni.getSystemInfoSync();
				  // 1. 清除画布（使用实际尺寸）
				  ctx.clearRect(0, 0, windowWidth * 2, windowHeight * 2); // 考虑retina屏幕
				  // 2. 绘制全屏遮罩
				  ctx.setFillStyle('rgba(255, 255, 255, 0.5)');
				  ctx.fillRect(0, 0, windowWidth * 2, windowHeight * 2);
				  ctx.draw(false, () => {
					uni.hideLoading(); // 如果之前有loading可以隐藏
				  });
			},
			//测试接口
			async textJieKou(url,data){
				let returnRes ;
				await this.$http(url,data, 'GET').then(res => {
					 returnRes = res;
					 console.log("方法内部返回:",res);
				});
				
				return returnRes; 
			},
		}
	}
</script>

<style scoped>
	
	.zdyNavBox {
		width: 100vw;
		background: #FFFFFF;
		position: fixed;
		top: 0;
		left: 0;
		z-index: 9999999;
	}

	.zdyNav {
		display: flex;
		justify-content: space-between;
		align-items: center;
		padding: 14rpx 6rpx;
	}
	
	.zdyNavLeft {
		width: 120rpx;
	}
	
	.tab-box{
		width: 360rpx;
		display: flex;
		height: 65rpx;
		align-items: center;
		justify-content: center;
		
	}
	
	.zdyNavRight {
		background: #FFFFFF;
		text-align: center;
		font-size: 28rpx;
		color: #3F90F7;
		width: 120rpx;
	}
	.box{
		
	}
	.title{
		background: #FFFFFF;
		text-align: center;
		font-size: 32rpx;
		color: #1777FF;
	}
	.sanjiao{
		font-size: 14rpx;
		color: #1777FF;
		padding: 10rpx 0 0 8rpx;
		/* right: 42%;
		top: 40%; */
	}
	.shangjian{
		padding: 0rpx 0 0 8rpx;
	}
	.title-box{
		display: grid;
		grid-template-columns: repeat(3,1fr);
		gap: 5rpx;
		padding-bottom: 20rpx;
		.item{
			
			margin: 30rpx 10rpx;
			height: 220rpx;
			.item-image{
				border: solid 1rpx #999999;
				border-radius: 10rpx;
				padding-bottom: 10rpx;
			}
			.item-title{
				text-align: center;
			}
		}
		
	}
	.box-image-big{
		background: #ffffff;
		height: 80vh;
		.image-big{
			position: relative;
			width: 100%;
			height: 80vh;
		}
		.drawing-canvas {
		position: absolute;
		top: 0;
		left: 0;
		width: 100%;
		height: 100%;
		z-index: 10;
}
		.box-btn{
			display: flex;
			justify-content: space-between;
			position: relative;
			top: -50%;
			z-index: 99999;
			.leftBtn{
				width: 40rpx;
				height: 100rpx;
				background: #999999;
				color: #ffffff;
				font-size: 35rpx;
				line-height: 100rpx;
				text-align: center;
				border-radius: 0 15rpx 15rpx 0;
			}
			.rightBtn{
				width: 40rpx;
				height: 100rpx;
				background: #999999;
				color: #ffffff;
				font-size: 35rpx;
				line-height: 100rpx;
				text-align: center;
				border-radius: 15rpx 0 0 15rpx;
			}
		}
	}

	.box-image-small{
		z-index: 999;
		.small-image{
			width: 100%;
			height: 420rpx;
			background: #ffffff;
			position: relative; /* 关键：为遮罩层提供定位基准 */
			.small-this-image{
				transform: rotate(-90deg); 
				height: 750rpx;
				width: 420rpx;
				margin: -150rpx 165rpx;
			}
			
		}
	}
	
	
	.image-mask {
	  position: absolute;
	  top: 0;
	  left: 0;
	 width: 100%;
	  height: 100%;
	  background: rgba(255, 255, 255, 0.5);
	  pointer-events: none;
	  z-index: 1; /* 确保在取消区域之下 */
	}
	/* 双箭头核心实现 */
	.box-jiantou {
		background: #ffffff;
		text-align: center;
		margin-top: -5rpx;
		.jian-span{
			width: 20rpx;
			height: 40rpx;
			line-height: 40rpx;
			transform: rotate(-90deg);
			transform-origin: center;
			margin: 0 auto;
			color: #999;
			
		}
		.jian-down{
			transform: rotate(90deg);
			transform-origin: center;
		}
	}
	.box-lab{
		background: #ffffff;
		z-index: 999;
	}
	.box-lab-scr{
		.uni-scroll-view-content{
			display: flex;
			flex-direction: row;
			flex-wrap: nowrap;
			white-space: nowrap;
			
		}
	}
	
	.lab-titles{
		/* width: 130rpx !important; */
		/* min-width: 130rpx !important; */
		height: 60rpx;
		font-size: 35rpx;
		color: #999999;
		padding-left: 10rpx;
		margin: 10rpx;
		padding-right: 8rpx;
		text-align: center;
	} 
	.clickLab{
		color: #1777FF;
		border-bottom: 4rpx solid #1777FF;
	}
	.lab-grid{
		display: grid;
		grid-template-columns: repeat(4,1fr);
		background: #ffffff;
		gap: 1rpx;
		.lab-child{
			margin: 10rpx;
			.lab-child-image{
				border: 1rpx solid #E2E2E2;
				border-radius: 14rpx;
			}
			.lab-child-title{
				text-align: center;
				font-size: 24rpx;
			}
		}
	}
	
	
	
</style>