<template>
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<div class="matching">
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<div
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class="connect"
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id="connect"
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ref="connect"
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@mousemove="mousemove"
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@mouseup="(e) => touchend(e)"
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>
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<div class="answer">
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<div class="answer-box">
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<div
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class="answer-box-item"
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v-for="(item, index) in leftArr"
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:key="index"
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ref="left"
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@mousedown="(e) => touchstart(e, item, index)"
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:style="{ backgroundColor: primaryColor }"
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v-html="item.label.txt"
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></div>
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</div>
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<div class="answer-box">
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<div
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class="answer-box-item tl-le"
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v-for="(item, index) in rightArr"
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:key="index"
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ref="right"
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:style="{ backgroundColor: primaryColor }"
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v-html="item.label.txt"
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></div>
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</div>
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</div>
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<canvas
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class="connect-canvasA"
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:width="clientWidth"
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:height="clientHeight"
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ref="canvasA"
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></canvas>
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<canvas
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class="connect-canvasB"
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:width="clientWidth"
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:height="clientHeight"
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ref="canvasB"
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></canvas>
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</div>
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<!-- 按钮 -->
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<div class="btn-bottom">
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<el-button @click="submitData">提交</el-button>
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<el-button @click="saveData" :style="{ borderColor: primaryColor }"
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>保存</el-button
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>
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<el-button @click="redo">重做</el-button>
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<el-button @click="handleAnswer" :style="{ borderColor: primaryColor }"
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>查看答案</el-button
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>
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</div>
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<!-- 解析 -->
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<ul class="show-answer" v-if="isShowAnswer">
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<li v-if="isRight !== null">
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答案结果：<span v-if="isRight" style="color: #83e089">正确</span>
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<span v-if="isRight == false" style="color: #d81e06">错误</span>
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</li>
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<li class="show-answer-box">
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<div>答案:</div>
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<div>
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<img :src="question.answerImg" alt="" class="w100" />
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</div>
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</li>
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</ul>
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</div>
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</template>
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<script>
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export default {
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data() {
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return {
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isDragging: false,
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leftArr: [],
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rightArr: [],
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location: [],
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canvasA: null,
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canvasB: null,
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leftDom: [],
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rightDom: [],
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clientWidth: 0,
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clientHeight: 0,
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scrollTop: 0,
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debounce: false,
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checkItem: null,
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checkItemIndex: null,
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isShowAnswer: false,
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isRight: null,
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value: [],
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pageNum: null,
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};
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},
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props: {
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rawData: {
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type: Object,
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default: () => {
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return {
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left: [],
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right: [],
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};
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},
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},
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question: {
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type: Object,
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default: () => {
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return [];
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},
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},
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primaryColor: {
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type: String,
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default: "#0bab87",
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},
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},
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watch: {
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rawData: {
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immediate: true,
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handler(val) {
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if (val.left && val.left.length) this.init();
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},
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},
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},
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mounted() {
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// 获取当前页码，用于匹配本次存储题目数据
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this.pageNum = this.handlePage();
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// 添加滚动事件 监听 解决因为滚动引起的拖动线不对的问题
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window.addEventListener(
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"scroll",
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(e) => {
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// 加个防抖
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if (this.debounce) clearTimeout(this.debounce);
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this.debounce = setTimeout(() => {
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this.debounce = false;
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this.scrollTop = e.target.scrollTop;
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}, 500);
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},
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true
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);
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let connect = this.$refs.connect;
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this.clientWidth = connect.clientWidth;
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this.clientHeight = connect.clientHeight;
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this.canvasA = this.$refs.canvasA.getContext("2d");
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this.canvasB = this.$refs.canvasB.getContext("2d");
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this.$nextTick(() => {
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this.drawing();
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});
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this.getAnswer();
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},
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methods: {
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init() {
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this.leftArr = this.rawData.left.map((r) => {
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return {
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label: r,
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line: [],
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value: [],
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};
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});
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this.rightArr = this.rawData.right.map((r) => {
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return {
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label: r,
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};
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});
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// 等dom 渲染完成
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this.$nextTick(() => {
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this.leftDom = this.$refs.left.map((r, i) => {
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return {
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bom: r,
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index: i,
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};
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});
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this.rightDom = this.$refs.right.map((r, i) => {
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return {
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bom: r,
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index: i,
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};
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});
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this.value.map((r) => {
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this.leftArr[r.left].line = this.attachment(r.left, r.right);
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this.leftArr[r.left].value = [r.right];
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});
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this.drawing();
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});
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},
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// 触摸结束
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touchend(e, index) {
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this.isDragging = false;
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if (this.question.showAnswer) {
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return false;
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}
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// let event = e.changedTouches[0];
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// document.elementFromPoint 重点，根据x,y坐标 取当前元素 所有能运行的逻辑 都依托于这里。
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let dom = (this.container ? this.container : document).elementFromPoint(
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e.pageX,
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e.pageY
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);
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// 右边的dom是哪个
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let right = this.rightDom.find((r) => r.bom === dom);
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// 不管是哪个都清除掉 底部的线
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this.canvasB.clearRect(0, 0, this.clientWidth, this.clientHeight);
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// 如果不是右边的dom 直接把 线 干掉 -- 证明不是 没有拖到右边上
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if (!right) {
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this.checkItem.line = [];
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return;
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}
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// 如果已有的不是我自己 直接替换掉上一个的
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if (this.checkItem.value[0] !== right.index) {
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let model = this.leftArr.find((r) => r.value[0] === right.index);
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if (model) {
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model.value = [];
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model.line = [];
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}
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this.checkItem.value = [right.index];
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}
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// 重新赋值 线的 x y 轴
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this.checkItem.line = this.attachment(this.checkItemIndex, right.index);
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this.drawing();
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let model = this.leftArr
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.map((r, i) => {
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return {
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left: i,
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right: r.value[0],
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};
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})
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.filter((r) => r.right !== undefined);
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this.$emit("input", model);
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this.question.userChoise = model;
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// console.log(JSON.stringify(model));
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},
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// 触摸开始
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touchstart(e, item, index) {
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this.isDragging = true;
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this.checkItem = item;
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this.checkItemIndex = index;
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e.stopPropagation();
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// let event = e.targetTouches[0];
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item.line = [
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e.pageX,
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e.pageY - this.$refs.connect.getBoundingClientRect().y + this.scrollTop,
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];
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},
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// // 触摸中
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// touchmove(e, item) {
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// if(!this.isDragging) return false
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// console.log('移动',e);
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// if (this.question.showAnswer) {
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// return false;
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// }
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// // let event = e.targetTouches[0];
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// item.line[2] = e.pageX;
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// item.line[3] = e.pageY - this.$refs.connect.getBoundingClientRect().y + this.scrollTop;
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// this.backstrockline(item.line);
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// },
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// 移动中
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mousemove(e) {
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if (!this.isDragging) return false;
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if (this.question.showAnswer) {
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return false;
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}
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this.checkItem.line[2] = e.pageX;
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this.checkItem.line[3] =
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e.pageY - this.$refs.connect.getBoundingClientRect().y + this.scrollTop;
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this.backstrockline(this.checkItem.line);
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},
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// 拖动的时候画线
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backstrockline(val) {
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let canvasB = this.canvasB;
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canvasB.clearRect(0, 0, this.clientWidth, this.clientHeight);
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canvasB.save();
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canvasB.beginPath();
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canvasB.lineWidth = 2;
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canvasB.moveTo(val[0], val[1]);
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canvasB.lineTo(val[2], val[3]);
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canvasB.strokeStyle = "#0C6";
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canvasB.stroke();
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canvasB.restore();
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},
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// 渲染出拖动之后的线
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drawing() {
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let canvasA = this.canvasA;
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this.canvasA.clearRect(0, 0, this.clientWidth, this.clientHeight);
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canvasA.beginPath();
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canvasA.lineWidth = 2;
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for (let i = 0; i < this.leftArr.length; i++) {
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const line = this.leftArr[i].line;
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// console.log(line);
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// console.log(this.leftArr[i]);
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if (line.length) {
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canvasA.moveTo(line[0], line[1]);
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canvasA.lineTo(line[2], line[3]);
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}
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}
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canvasA.strokeStyle = "#0C6";
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canvasA.stroke();
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},
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// 根据 左边 和右边的 index,换算出 左右的X,Y轴坐标
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attachment(index, rightIndex) {
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let leftEvent = this.leftDom[index].bom;
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let rightEvent = this.rightDom[rightIndex].bom;
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// 为了让线都在中间 x轴不用改 最简单
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let leftX = leftEvent.clientWidth + leftEvent.offsetLeft;
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let rightX = rightEvent.offsetLeft;
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let leftY = leftEvent.offsetTop + leftEvent.clientHeight / 2;
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let rightY = rightEvent.offsetTop + rightEvent.clientHeight / 2;
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return [leftX, leftY, rightX, rightY];
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},
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areArraysEqual(array1, array2) {
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// 如果两个数组长度不同，则它们不等
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if (array1.length !== array2.length) {
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return false;
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}
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// 遍历数组并比较每个对象的属性
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for (let i = 0; i < array1.length; i++) {
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const obj1 = array1[i];
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const obj2 = array2[i];
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// 如果对象的left或right属性不相等，则数组不等
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if (obj1.left !== obj2.left || obj1.right !== obj2.right) {
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return false;
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}
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}
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// 如果所有对象都匹配，则数组相等
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return true;
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},
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// 查看答案
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handleAnswer() {
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this.isShowAnswer = !this.isShowAnswer;
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},
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// 提交
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submitData() {
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const answerArr = [];
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const values = this.question.options.values;
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for (let index = 0; index < values.length; index++) {
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const item = values[index];
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const rightIndex = this.question.options.linkValues.findIndex(
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(citem) => citem.oldId == item.oldId
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);
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answerArr.push({
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left: index,
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right: rightIndex,
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});
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}
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console.log(this.question.userChoise,answerArr);
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this.isRight = this.areArraysEqual(this.question.userChoise, answerArr);
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this.isShowAnswer = true;
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},
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// 获取当前页码
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handlePage() {
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let pageNum = null;
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const element = (
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this.container ? this.container : document
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).querySelector("matching");
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if (element) {
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pageNum = this.getParentWithClass(element, "page-box").getAttribute(
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"page"
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);
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}
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return pageNum;
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},
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getParentWithClass(element, className) {
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while (element.parentElement) {
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element = element.parentElement;
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if (element.classList.contains(className)) {
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return element;
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}
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}
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},
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// 获取本地存储题目答案
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getAnswer() {
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const data = localStorage.getItem(
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this.config.activeBook.name + "-matching-" + this.pageNum
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);
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if (data) {
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this.value = JSON.parse(data);
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}
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},
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// 保存
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saveData() {
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if (this.question.userChoise.length)
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localStorage.setItem(
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this.config.activeBook.name + "-matching-" + this.pageNum,
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JSON.stringify(this.question.userChoise)
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);
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// console.log('保存成功',this.config.activeBook.name,this.pageNum);
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},
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// 重做
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redo() {
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this.question.showAnswer = false;
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localStorage.removeItem(
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this.config.activeBook.name + "-matching-" + this.pageNum
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);
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this.value = [];
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for (let index = 0; index < this.leftArr.length; index++) {
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const item = this.leftArr[index];
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item.value = [];
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item.line = [];
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}
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this.leftArr;
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this.drawing();
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this.isShowAnswer = false;
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},
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},
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};
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</script>
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<style lang="less" scoped>
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.connect {
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position: relative;
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padding: 10px;
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&-canvasA {
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position: absolute;
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left: 0px;
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top: 0px;
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z-index: 1;
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}
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&-canvasB {
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position: absolute;
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left: 0px;
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top: 0px;
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z-index: 0;
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}
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}
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.answer {
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width: 100%;
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display: flex;
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justify-content: space-between;
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&-box {
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display: flex;
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flex-direction: column;
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justify-content: space-between;
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width: 40%;
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text-align: center;
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&-item {
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cursor: pointer;
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z-index: 2;
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padding: 10px;
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border-radius: 4px;
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box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
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margin-bottom: 20px;
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line-height: 24px;
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padding: 6px;
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}
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&-item:last-child {
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margin-bottom: 0;
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}
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}
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}
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.tl-le {
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text-align: left;
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}
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.connect {
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-webkit-user-select: none; /* Safari */
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-moz-user-select: none; /* Firefox */
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-ms-user-select: none; /* IE10+/Edge */
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user-select: none; /* 标准语法 */
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}
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.show-answer {
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margin: 30px auto;
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width: 100%;
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height: min-content;
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box-shadow: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
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li {
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padding: 10px;
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}
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}
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.btn-bottom {
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width: 70%;
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margin: 70px auto 0 auto;
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display: flex;
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justify-content: space-evenly;
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flex-wrap: wrap;
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.el-button {
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margin-top: 10px;
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}
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}
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.el-button {
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height: 30px;
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padding: 7px;
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min-width: 78px;
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}
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.answer-box-item {
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/deep/ .un1 {
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-webkit-text-emphasis-style: dot;
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-moz-text-emphasis-style: dot;
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-ms-text-emphasis-style: dot;
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text-emphasis-style: dot;
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-webkit-text-emphasis-position: under;
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-moz-text-emphasis-position: under;
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-ms-text-emphasis-position: under;
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text-emphasis-position: under;
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}
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}
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</style>
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