776 lines
19 KiB
Vue
776 lines
19 KiB
Vue
<template>
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<view class="sign">
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<view class="imgBox">
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<view class="nom_img" v-if="!showImg" @click="signModShow=true">
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<image v-if="!showImg" src="/static/other/signs.png" style="width: 34px;height: 34px;">
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</image>
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</view>
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<view class="across_img" v-if="showImg">
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<view v-if="showImg" class="delete_icon" @click.stop="deleteImg">
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x
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</view>
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<image v-if="showImg" :src="showImg" style="width: 140px;height: 80px;" @click="previewImg(showImg)">
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</image>
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</view>
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</view>
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<umask :show="signModShow" @click="signModShow=false" :duration="0">
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<view class="warp">
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<view class="signBox" @tap.stop>
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<view class="wrapper">
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<view class="handBtn">
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<!-- #ifdef MP-WEIXIN -->
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<image @click="selectColorEvent('black','#1A1A1A')"
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:src="selectColor === 'black' ? '/static/other/color_black_selected.png' : '/static/other/color_black.png'"
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class="black-select"></image>
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<image @click="selectColorEvent('red','#ca262a')"
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:src="selectColor === 'red' ? '/static/other/color_red_selected.png' : '/static/other/color_red.png'"
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class="red-select"></image>
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<!-- #endif -->
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<!-- #ifndef MP-WEIXIN -->
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<view class="color_pic" :style="{background:lineColor}" @click="showPickerColor=true">
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</view>
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<!-- #endif -->
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<button @click="clear" class="saveBtn">清空</button>
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<!-- <button @click="saveCanvasAsImg" class="saveBtn">保存</button>
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<button @click="previewCanvasImg" class="previewBtn">预览</button> -->
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<button @click="subCanvas" class="subBtn">完成</button>
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<button @click="undo" class="undoBtn">撤销</button>
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<span class="emptyInfo" style="color: red;" v-if="emptyShow">你还没有绘制任何东西哦</span>
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</view>
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<view class="handCenter" :style="{left:canvasLeft+'px'}">
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<canvas :disable-scroll="true" @touchstart="uploadScaleStart" @touchmove="uploadScaleMove"
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@touchend="uploadScaleEnd" :style="{width:'100%',height:'calc(85vh - 8rpx)'}"
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:canvas-id="canvasId"></canvas>
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</view>
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<view class="handCenters">
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<canvas :canvas-id="canvasIds"
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:style="{width:outSignWidth+'px',height:outSignHeight+'px'}"></canvas>
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</view>
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<view class="handRight">
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<view class="handTitle">请签名
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</view>
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</view>
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</view>
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</view>
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</view>
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</umask>
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<pickerColor :isShow="showPickerColor" :bottom="0" @callback='getPickerColor' />
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</view>
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</template>
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<script>
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import umask from "./u-mask/u-mask.vue"
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import pickerColor from "./pickerColor.vue"
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export default {
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components: {
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umask,
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pickerColor
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},
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data() {
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return {
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canvasLeft: 10000,
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emptyShow: false,
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signModShow: false,
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showImg: "",
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showPickerColor: false,
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ctx: '',
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ctxs: '',
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canvasWidth: 0,
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canvasHeight: 0,
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selectColor: 'black',
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lineColor: '#1A1A1A',
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points: [],
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historyList: [],
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canAddHistory: true,
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getImagePath: () => {
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let that = this
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return new Promise((resolve) => {
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uni.canvasToTempFilePath({
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canvasId: that.canvasId,
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fileType: 'png',
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quality: 1, //图片质量
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success: res => resolve(res.tempFilePath)
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}, this)
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})
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},
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requestAnimationFrame: void 0,
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};
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},
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watch: {
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signModShow(newValue, oldValue) {
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newValue ? this.canvasLeft = 74 : this.canvasLeft = 10000
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}
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},
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props: { //可用于修改的参数放在props里 也可单独放在外面做成组件调用 传值
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action: {
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type: String,
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default: ''
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},
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canvasId: {
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type: String,
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default: 'canvasDr'
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},
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canvasIds: {
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type: String,
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default: 'canvasRo'
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},
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header: {
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type: Object,
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default: {}
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},
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outSignWidth: {
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type: Number,
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default: 54
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},
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outSignHeight: {
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type: Number,
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default: 24
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},
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minSpeed: { //画笔最小速度
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type: Number,
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default: 1.5
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},
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minWidth: { //线条最小粗度
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type: Number,
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default: 3,
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},
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maxWidth: { //线条最大粗度
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type: Number,
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default: 10
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},
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openSmooth: { //开启平滑线条（笔锋）
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type: Boolean,
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default: true
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},
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maxHistoryLength: { //历史最大长度
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type: Number,
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default: 20
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},
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maxWidthDiffRate: { //最大差异率
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type: Number,
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default: 20
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},
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undoScan: { //撤销重新渲染偏移缩放校准
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type: Number,
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default: 0.83
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},
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bgColor: { //背景色
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type: String,
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default: ''
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},
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},
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mounted() {
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if (!this.ctx) {
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this.ctx = uni.createCanvasContext(this.canvasId, this);
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}
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if (!this.ctxs) {
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this.ctxs = uni.createCanvasContext(this.canvasIds, this);
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}
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let that = this
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this.$nextTick(() => {
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uni.createSelectorQuery().in(this).select('.handCenter').boundingClientRect(rect => {
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that.canvasWidth = rect.width;
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that.canvasHeight = rect.height;
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that.drawBgColor()
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})
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.exec();
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})
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},
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methods: {
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getPickerColor(color) {
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this.showPickerColor = false;
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if (color) {
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this.lineColor = color;
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}
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},
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// 笔迹开始
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uploadScaleStart(e) {
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this.canAddHistory = true
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this.ctx.setStrokeStyle(this.lineColor)
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this.ctx.setLineCap("round") //'butt'、'round'、'square'
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},
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// 笔迹移动
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uploadScaleMove(e) {
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let temX = e.changedTouches[0].x
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let temY = e.changedTouches[0].y
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this.initPoint(temX, temY)
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this.onDraw()
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},
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/**
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* 触摸结束
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*/
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uploadScaleEnd() {
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this.canAddHistory = true;
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this.points = [];
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},
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/**
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* 记录点属性
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*/
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initPoint(x, y) {
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var point = {
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x: x,
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y: y,
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t: Date.now()
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};
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var prePoint = this.points.slice(-1)[0];
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if (prePoint && (prePoint.t === point.t || prePoint.x === x && prePoint.y === y)) {
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return;
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}
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if (prePoint && this.openSmooth) {
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var prePoint2 = this.points.slice(-2, -1)[0];
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point.distance = Math.sqrt(Math.pow(point.x - prePoint.x, 2) + Math.pow(point.y - prePoint.y, 2));
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point.speed = point.distance / (point.t - prePoint.t || 0.1);
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point.lineWidth = this.getLineWidth(point.speed);
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if (prePoint2 && prePoint2.lineWidth && prePoint.lineWidth) {
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var rate = (point.lineWidth - prePoint.lineWidth) / prePoint.lineWidth;
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var maxRate = this.maxWidthDiffRate / 100;
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maxRate = maxRate > 1 ? 1 : maxRate < 0.01 ? 0.01 : maxRate;
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if (Math.abs(rate) > maxRate) {
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var per = rate > 0 ? maxRate : -maxRate;
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point.lineWidth = prePoint.lineWidth * (1 + per);
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}
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}
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}
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this.points.push(point);
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this.points = this.points.slice(-3);
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},
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/**
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* @param {Object}
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* 线宽
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*/
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getLineWidth(speed) {
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var minSpeed = this.minSpeed > 10 ? 10 : this.minSpeed < 1 ? 1 : this.minSpeed; //1.5
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var addWidth = (this.maxWidth - this.minWidth) * speed / minSpeed;
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var lineWidth = Math.max(this.maxWidth - addWidth, this.minWidth);
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return Math.min(lineWidth, this.maxWidth);
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},
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/**
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* 绘画逻辑
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*/
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onDraw() {
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if (this.points.length < 2) return;
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this.addHistory();
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var point = this.points.slice(-1)[0];
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var prePoint = this.points.slice(-2, -1)[0];
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let that = this
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var onDraw = function onDraw() {
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if (that.openSmooth) {
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that.drawSmoothLine(prePoint, point);
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} else {
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that.drawNoSmoothLine(prePoint, point);
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}
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};
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if (typeof this.requestAnimationFrame === 'function') {
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this.requestAnimationFrame(function() {
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return onDraw();
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});
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} else {
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onDraw();
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}
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},
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//添加历史图片地址
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addHistory() {
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if (!this.maxHistoryLength || !this.canAddHistory) return;
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this.canAddHistory = false;
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if (!this.getImagePath) {
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this.historyList.length++;
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return;
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}
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//历史地址 (暂时无用)
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let that = this
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that.getImagePath().then(function(url) {
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if (url) {
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that.historyList.push(url)
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that.historyList = that.historyList.slice(-that.maxHistoryLength);
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}
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});
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},
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//画平滑线
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drawSmoothLine(prePoint, point) {
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var dis_x = point.x - prePoint.x;
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var dis_y = point.y - prePoint.y;
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if (Math.abs(dis_x) + Math.abs(dis_y) <= 2) {
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point.lastX1 = point.lastX2 = prePoint.x + dis_x * 0.5;
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point.lastY1 = point.lastY2 = prePoint.y + dis_y * 0.5;
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} else {
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point.lastX1 = prePoint.x + dis_x * 0.3;
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point.lastY1 = prePoint.y + dis_y * 0.3;
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point.lastX2 = prePoint.x + dis_x * 0.7;
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point.lastY2 = prePoint.y + dis_y * 0.7;
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}
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point.perLineWidth = (prePoint.lineWidth + point.lineWidth) / 2;
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if (typeof prePoint.lastX1 === 'number') {
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this.drawCurveLine(prePoint.lastX2, prePoint.lastY2, prePoint.x, prePoint.y, point.lastX1, point
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.lastY1, point.perLineWidth);
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if (prePoint.isFirstPoint) return;
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if (prePoint.lastX1 === prePoint.lastX2 && prePoint.lastY1 === prePoint.lastY2) return;
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var data = this.getRadianData(prePoint.lastX1, prePoint.lastY1, prePoint.lastX2, prePoint.lastY2);
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var points1 = this.getRadianPoints(data, prePoint.lastX1, prePoint.lastY1, prePoint.perLineWidth / 2);
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var points2 = this.getRadianPoints(data, prePoint.lastX2, prePoint.lastY2, point.perLineWidth / 2);
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this.drawTrapezoid(points1[0], points2[0], points2[1], points1[1]);
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} else {
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point.isFirstPoint = true;
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}
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},
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//画不平滑线
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drawNoSmoothLine(prePoint, point) {
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point.lastX = prePoint.x + (point.x - prePoint.x) * 0.5;
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point.lastY = prePoint.y + (point.y - prePoint.y) * 0.5;
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if (typeof prePoint.lastX === 'number') {
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this.drawCurveLine(prePoint.lastX, prePoint.lastY, prePoint.x, prePoint.y, point.lastX, point.lastY,
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this.maxWidth);
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}
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},
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//画线
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drawCurveLine(x1, y1, x2, y2, x3, y3, lineWidth) {
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lineWidth = Number(lineWidth.toFixed(1));
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this.ctx.setLineWidth && this.ctx.setLineWidth(lineWidth);
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this.ctx.lineWidth = lineWidth;
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this.ctx.beginPath();
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this.ctx.moveTo(Number(x1.toFixed(1)), Number(y1.toFixed(1)));
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this.ctx.quadraticCurveTo(Number(x2.toFixed(1)), Number(y2.toFixed(1)), Number(x3.toFixed(1)), Number(y3
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.toFixed(1)));
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this.ctx.stroke();
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this.ctx.draw && this.ctx.draw(true);
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},
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//画梯形
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drawTrapezoid(point1, point2, point3, point4) {
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this.ctx.beginPath();
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this.ctx.moveTo(Number(point1.x.toFixed(1)), Number(point1.y.toFixed(1)));
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this.ctx.lineTo(Number(point2.x.toFixed(1)), Number(point2.y.toFixed(1)));
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this.ctx.lineTo(Number(point3.x.toFixed(1)), Number(point3.y.toFixed(1)));
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this.ctx.lineTo(Number(point4.x.toFixed(1)), Number(point4.y.toFixed(1)));
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this.ctx.setFillStyle && this.ctx.setFillStyle(this.lineColor);
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this.ctx.fillStyle = this.lineColor;
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this.ctx.fill();
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this.ctx.draw && this.ctx.draw(true);
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},
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//获取弧度
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getRadianData(x1, y1, x2, y2) {
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var dis_x = x2 - x1;
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var dis_y = y2 - y1;
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if (dis_x === 0) {
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return {
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val: 0,
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pos: -1
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};
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}
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if (dis_y === 0) {
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return {
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val: 0,
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pos: 1
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};
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}
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var val = Math.abs(Math.atan(dis_y / dis_x));
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if (x2 > x1 && y2 < y1 || x2 < x1 && y2 > y1) {
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return {
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val: val,
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pos: 1
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};
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}
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return {
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val: val,
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pos: -1
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};
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},
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//获取弧度点
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getRadianPoints(radianData, x, y, halfLineWidth) {
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if (radianData.val === 0) {
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if (radianData.pos === 1) {
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return [{
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x: x,
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y: y + halfLineWidth
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}, {
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x: x,
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y: y - halfLineWidth
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}];
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}
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return [{
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y: y,
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x: x + halfLineWidth
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}, {
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y: y,
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x: x - halfLineWidth
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}];
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}
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var dis_x = Math.sin(radianData.val) * halfLineWidth;
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var dis_y = Math.cos(radianData.val) * halfLineWidth;
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if (radianData.pos === 1) {
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return [{
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x: x + dis_x,
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y: y + dis_y
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}, {
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x: x - dis_x,
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y: y - dis_y
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}];
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}
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return [{
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x: x + dis_x,
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y: y - dis_y
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}, {
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x: x - dis_x,
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y: y + dis_y
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}];
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},
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/**
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* 背景色
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*/
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drawBgColor() {
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if (!this.bgColor) return;
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this.ctx.setFillStyle && this.ctx.setFillStyle(this.bgColor);
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this.ctx.fillStyle = this.bgColor;
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this.ctx.fillRect(0, 0, this.canvasWidth, this.canvasHeight);
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this.ctx.draw && this.ctx.draw(true);
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},
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//图片绘制
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drawByImage(url) {
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this.ctx.clearRect(0, 0, this.canvasWidth, this.canvasHeight);
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try {
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this.ctx.drawImage(url, 0, 0, this.canvasWidth * this.undoScan, this.canvasHeight * this.undoScan);
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this.ctx.draw && this.ctx.draw(true);
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} catch (e) {
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this.historyList.length = 0;
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}
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},
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/**
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* 清空
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*/
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clear() {
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this.ctx.clearRect(0, 0, this.canvasWidth, this.canvasHeight);
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this.ctx.draw && this.ctx.draw();
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this.drawBgColor();
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this.historyList.length = 0;
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},
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//撤消
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undo() {
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if (!this.getImagePath || !this.historyList.length) return;
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var pngURL = this.historyList.splice(-1)[0];
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this.drawByImage(pngURL);
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if (this.historyList.length === 0) {
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this.clear();
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}
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},
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//是否为空
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isEmpty() {
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return this.historyList.length === 0;
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},
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/**
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* @param {Object} str
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* @param {Object} color
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* 选择颜色
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*/
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selectColorEvent(str, color) {
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this.selectColor = str;
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this.lineColor = color;
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this.ctx.setStrokeStyle(this.lineColor)
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},
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//完成
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subCanvas() {
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let that = this
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if (that.isEmpty()) {
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that.emptyShow = true
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setTimeout(function() {
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that.emptyShow = false
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}, 1000)
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return
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}
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uni.canvasToTempFilePath({
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canvasId: that.canvasId,
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fileType: 'png',
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quality: 1, //图片质量
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success(res) {
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that.ctxs.translate(0, that.outSignHeight);
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that.ctxs.rotate(-90 * Math.PI / 180)
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that.ctxs.drawImage(res.tempFilePath, 0, 0, that.outSignHeight, that.outSignWidth)
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that.ctxs.draw()
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setTimeout(() => {
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uni.canvasToTempFilePath({
|
|
canvasId: that.canvasIds,
|
|
fileType: 'png',
|
|
quality: 1, //图片质量
|
|
success: function(res1) {
|
|
if (that.action) {
|
|
uni.showLoading()
|
|
uni.uploadFile({
|
|
url: that.action, //图片上传post请求的地址
|
|
filePath: res1.tempFilePath,
|
|
name: "file",
|
|
header: that.header,
|
|
success: (uploadFileRes) => {
|
|
uni.hideLoading()
|
|
that.showImg = res1.tempFilePath
|
|
that.$emit('signToUrl',
|
|
uploadFileRes)
|
|
that.signModShow = false
|
|
that.clear()
|
|
},
|
|
fail: (error) => {
|
|
uni.hideLoading()
|
|
}
|
|
});
|
|
} else {
|
|
that.showImg = res1.tempFilePath
|
|
that.$emit('signToUrl', {
|
|
error_code: "201",
|
|
msg: "请配置上传文件接口参数action"
|
|
})
|
|
that.signModShow = false
|
|
that.clear()
|
|
}
|
|
},
|
|
fail: (err) => {}
|
|
}, that)
|
|
}, 200);
|
|
}
|
|
}, this);
|
|
},
|
|
//保存到相册
|
|
saveCanvasAsImg() {
|
|
uni.canvasToTempFilePath({
|
|
canvasId: this.canvasId,
|
|
fileType: 'png',
|
|
quality: 1, //图片质量
|
|
success(res) {
|
|
uni.saveImageToPhotosAlbum({
|
|
filePath: res.tempFilePath,
|
|
success(res) {
|
|
uni.showToast({
|
|
title: '已保存到相册',
|
|
duration: 2000
|
|
});
|
|
}
|
|
});
|
|
}
|
|
}, this);
|
|
},
|
|
//预览
|
|
previewCanvasImg() {
|
|
uni.canvasToTempFilePath({
|
|
canvasId: this.canvasId,
|
|
fileType: 'jpg',
|
|
quality: 1, //图片质量
|
|
success(res) {
|
|
uni.previewImage({
|
|
urls: [res.tempFilePath] //预览图片 数组
|
|
});
|
|
}
|
|
}, this);
|
|
},
|
|
deleteImg() {
|
|
this.showImg = ""
|
|
},
|
|
|
|
previewImg(img) {
|
|
uni.previewImage({
|
|
urls: [img] //预览图片 数组
|
|
});
|
|
},
|
|
|
|
}
|
|
};
|
|
</script>
|
|
|
|
<style lang="scss">
|
|
|
|
.imgBox {
|
|
width: 140px;
|
|
height: 80px;
|
|
position: relative;
|
|
|
|
.nom_img {
|
|
border-radius: 8px;
|
|
border: 1px dashed;
|
|
border-color: #a3a3a3;
|
|
overflow: hidden;
|
|
display: flex;
|
|
justify-content: center;
|
|
align-items: center;
|
|
height: 80px;
|
|
width: 140px;
|
|
}
|
|
|
|
.nom_img:hover {
|
|
border-color: #008ef6 !important;
|
|
}
|
|
|
|
.across_img {
|
|
border: 1px dashed #a3a3a3;
|
|
border-radius: 8px;
|
|
height: 80px;
|
|
width: 140px;
|
|
|
|
.delete_icon {
|
|
position: absolute;
|
|
top: -12px;
|
|
right: -12px;
|
|
width: 24px;
|
|
height: 24px;
|
|
overflow: hidden;
|
|
color: #ffffff;
|
|
font-size: 24px;
|
|
text-align: center;
|
|
line-height: 20px;
|
|
background: #ff3c0c;
|
|
border-radius: 25px;
|
|
z-index: 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
.warp {
|
|
width: 100%;
|
|
height: 100vh;
|
|
display: flex;
|
|
justify-content: center;
|
|
align-items: center;
|
|
|
|
.signBox {
|
|
width: 85vw;
|
|
height: 85vh;
|
|
background: #ffffff;
|
|
border-radius: 8px;
|
|
}
|
|
}
|
|
|
|
.wrapper {
|
|
width: 85vw;
|
|
height: 85vh;
|
|
overflow: hidden;
|
|
display: flex;
|
|
align-content: center;
|
|
flex-direction: row;
|
|
justify-content: center;
|
|
font-size: 28rpx;
|
|
}
|
|
|
|
.handRight {
|
|
display: inline-flex;
|
|
align-items: center;
|
|
}
|
|
|
|
.handCenter {
|
|
position: fixed;
|
|
border: 4rpx dashed #e9e9e9;
|
|
flex: 5;
|
|
margin-top: 4rpx;
|
|
overflow: hidden;
|
|
box-sizing: border-box;
|
|
width: calc(100% - 84rpx - 200rpx);
|
|
height: calc(85vh - 8rpx)
|
|
}
|
|
|
|
.handCenters {
|
|
position: fixed;
|
|
top: 0;
|
|
left: 10000rpx;
|
|
flex: 5;
|
|
overflow: hidden;
|
|
box-sizing: border-box;
|
|
}
|
|
|
|
|
|
.handTitle {
|
|
transform: rotate(90deg);
|
|
flex: 1;
|
|
color: #666;
|
|
}
|
|
|
|
.handBtn button {
|
|
font-size: 28rpx;
|
|
}
|
|
|
|
.handBtn {
|
|
height: 85vh;
|
|
display: inline-flex;
|
|
flex-direction: column;
|
|
justify-content: space-between;
|
|
align-content: space-between;
|
|
flex: 1;
|
|
}
|
|
|
|
.delBtn {
|
|
position: absolute;
|
|
top: 380rpx;
|
|
left: 46rpx;
|
|
transform: rotate(90deg);
|
|
color: #666;
|
|
}
|
|
|
|
.subBtn {
|
|
position: absolute;
|
|
bottom: 158rpx;
|
|
left: 46rpx;
|
|
display: inline-flex;
|
|
transform: rotate(90deg);
|
|
background: #008ef6;
|
|
color: #fff;
|
|
text-align: center;
|
|
justify-content: center;
|
|
}
|
|
|
|
/*Peach - 新增 - 保存*/
|
|
|
|
.saveBtn {
|
|
position: absolute;
|
|
top: 650rpx;
|
|
left: 46rpx;
|
|
transform: rotate(90deg);
|
|
color: #666;
|
|
}
|
|
|
|
.previewBtn {
|
|
position: absolute;
|
|
top: 516rpx;
|
|
left: 46rpx;
|
|
transform: rotate(90deg);
|
|
color: #666;
|
|
}
|
|
|
|
.undoBtn {
|
|
position: absolute;
|
|
top: 780rpx;
|
|
left: 46rpx;
|
|
transform: rotate(90deg);
|
|
color: #666;
|
|
}
|
|
|
|
.emptyInfo {
|
|
position: absolute;
|
|
bottom: 418rpx;
|
|
left: -56rpx;
|
|
transform: rotate(90deg);
|
|
color: #666;
|
|
}
|
|
|
|
.color_pic {
|
|
width: 70rpx;
|
|
height: 70rpx;
|
|
border-radius: 25px;
|
|
position: absolute;
|
|
top: 200rpx;
|
|
left: 62rpx;
|
|
border: 1px solid #ddd;
|
|
}
|
|
|
|
/*Peach - 新增 - 保存*/
|
|
|
|
.black-select {
|
|
width: 60rpx;
|
|
height: 60rpx;
|
|
position: absolute;
|
|
top: 150rpx;
|
|
left: 70rpx;
|
|
}
|
|
|
|
.red-select {
|
|
width: 60rpx;
|
|
height: 60rpx;
|
|
position: absolute;
|
|
top: 260rpx;
|
|
left: 70rpx;
|
|
}
|
|
</style> |