修改
This commit is contained in:
曹辉
parent
c85d8901d7
commit
f7a022c3e8
@ -1,238 +1,245 @@
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<template>
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<view class="signature-wrap">
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<canvas
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:canvas-id="cid"
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:id="cid"
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@touchstart="onTouchStart"
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@touchmove="onTouchMove"
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@touchend="onTouchEnd"
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style="height:600rpx"
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:style="[{ width: formatSize(width)}, customStyle]"
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></canvas>
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<canvas :canvas-id="cid" :id="cid" @touchstart="onTouchStart" @touchmove="onTouchMove" @touchend="onTouchEnd"
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style="height:600rpx" :style="[{ width: formatSize(width)}, customStyle]"></canvas>
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<slot />
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</view>
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</template>
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<script>
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/**
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* sign canvas 手写签名
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* @description 设置线条宽度、颜色，撤回，清空
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* @tutorial
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* @property {String} cid canvas id 不设置则默认为 v-sign-时间戳
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* @property {String, Number} width canvas 宽度
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* @property {String, Number} height canvas 高度
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* @property {Object} customStyle 自定义样式
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* @property {String} lineColor 画笔颜色
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* @property {Number} lineWidth 画笔大小，权重大于 v-sign-pen 组件设置的画笔大小
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* @event {Function} init 当创建完 canvas 实例后触发，向外提供 canvas实例，撤回，清空方法
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* @example <v-sign @init="signInit"></v-sign>
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*/
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import { formatSize } from './utils'
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// convas 实例
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let canvasCtx
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/**
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* sign canvas 手写签名
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* @description 设置线条宽度、颜色，撤回，清空
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* @tutorial
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* @property {String} cid canvas id 不设置则默认为 v-sign-时间戳
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* @property {String, Number} width canvas 宽度
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* @property {String, Number} height canvas 高度
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* @property {Object} customStyle 自定义样式
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* @property {String} lineColor 画笔颜色
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* @property {Number} lineWidth 画笔大小，权重大于 v-sign-pen 组件设置的画笔大小
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* @event {Function} init 当创建完 canvas 实例后触发，向外提供 canvas实例，撤回，清空方法
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* @example <v-sign @init="signInit"></v-sign>
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*/
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import {
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formatSize
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} from './utils'
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// convas 实例
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let canvasCtx
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export default {
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name: 'v-sign',
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props: {
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// canvas id
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cid: {
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type: String,
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default: `v-sign-${Date.now()}`
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// required: true
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},
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// canvas 宽度
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width: {
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type: [String, Number],
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default: '100%'
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},
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// canvas 高度
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height: {
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type: [String, Number],
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default: 300
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},
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// 画笔大小，权重大于 v-sign-pen 组件设置的画笔大小
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lineWidth: {
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type: Number
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},
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// 线颜色
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lineColor: {
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type: String,
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default: '#000'
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},
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// canvas自定义样式
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customStyle: {
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type: Object,
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default: () => ({})
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}
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},
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provide() {
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return {
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getInterface: this.provideInterface
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}
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},
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data() {
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return {
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formatSize,
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lineData: [],
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winWidth: 0,
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winHeight: 0,
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penLineWidth: null, // v-sign-pen 组件设置的画笔大小
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}
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},
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mounted() {
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canvasCtx = uni.createCanvasContext(this.cid, this)
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// 初始化完成，向外暴露接口
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this.$emit('init', this.provideInterface())
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// 获取窗口宽高
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uni.getSystemInfo({
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success: res => {
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this.winWidth = res.windowWidth
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this.winHeight = res.windowHeight
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export default {
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name: 'v-sign',
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props: {
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// canvas id
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cid: {
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type: String,
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default: `v-sign-${Date.now()}`
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// required: true
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},
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// canvas 宽度
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width: {
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type: [String, Number],
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default: '100%'
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},
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// canvas 高度
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height: {
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type: [String, Number],
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default: 300
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},
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// 画笔大小，权重大于 v-sign-pen 组件设置的画笔大小
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lineWidth: {
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type: Number
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},
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// 线颜色
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lineColor: {
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type: String,
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default: '#000'
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},
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// canvas自定义样式
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customStyle: {
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type: Object,
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default: () => ({})
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}
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})
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},
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methods: {
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onTouchStart(e) {
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const pos = e.touches[0]
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this.lineData.push({
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style: {
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color: this.lineColor,
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width: this.lineWidth || this.penLineWidth || 4
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},
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// 屏幕坐标
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coordinates: [
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{
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},
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provide() {
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return {
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getInterface: this.provideInterface
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}
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},
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data() {
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return {
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formatSize,
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lineData: [],
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winWidth: 0,
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winHeight: 0,
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penLineWidth: null, // v-sign-pen 组件设置的画笔大小
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}
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},
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mounted() {
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canvasCtx = uni.createCanvasContext(this.cid, this)
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// 初始化完成，向外暴露接口
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this.$emit('init', this.provideInterface())
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// 获取窗口宽高
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uni.getSystemInfo({
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success: res => {
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this.winWidth = res.windowWidth
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this.winHeight = res.windowHeight
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}
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})
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},
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methods: {
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onTouchStart(e) {
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const pos = e.touches[0]
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this.lineData.push({
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style: {
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color: this.lineColor,
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width: this.lineWidth || this.penLineWidth || 4
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},
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// 屏幕坐标
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coordinates: [{
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type: e.type,
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x: pos.x,
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y: pos.y
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}]
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})
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this.drawLine()
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},
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onTouchMove(e) {
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const pos = e.touches[0]
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this.lineData[this.lineData.length - 1].coordinates.push({
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type: e.type,
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x: pos.x,
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y: pos.y
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})
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this.drawLine()
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},
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onTouchEnd(e) {
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// console.log(e.type, e)
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},
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// 清空画布
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clear() {
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this.lineData = []
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canvasCtx.clearRect(0, 0, this.winWidth, this.winHeight)
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canvasCtx.draw()
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},
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// 撤销
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revoke() {
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this.lineData.pop()
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this.lineData.forEach((item, index) => {
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canvasCtx.beginPath()
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canvasCtx.setLineCap('round')
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canvasCtx.setStrokeStyle(item.style.color)
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canvasCtx.setLineWidth(item.style.width)
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item.coordinates.forEach(pos => {
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if (pos.type == 'touchstart') {
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canvasCtx.moveTo(pos.x, pos.y)
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} else {
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canvasCtx.lineTo(pos.x, pos.y)
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}
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})
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canvasCtx.stroke()
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})
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canvasCtx.draw()
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},
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// 绘制线条
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drawLine() {
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const lineDataLen = this.lineData.length
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if (!lineDataLen) return
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const currentLineData = this.lineData[lineDataLen - 1]
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const coordinates = currentLineData.coordinates
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const coordinatesLen = coordinates.length
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if (!coordinatesLen) return
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let startPos
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let endPos
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if (coordinatesLen < 2) {
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// only start, no move event
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startPos = coordinates[coordinatesLen - 1]
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endPos = {
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x: startPos.x + 1,
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y: startPos.y
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}
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]
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})
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this.drawLine()
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},
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onTouchMove(e) {
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const pos = e.touches[0]
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this.lineData[this.lineData.length - 1].coordinates.push({
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type: e.type,
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x: pos.x,
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y: pos.y
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})
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this.drawLine()
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},
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onTouchEnd(e) {
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// console.log(e.type, e)
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},
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// 清空画布
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clear() {
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this.lineData = []
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canvasCtx.clearRect(0, 0, this.winWidth, this.winHeight)
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canvasCtx.draw()
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},
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// 撤销
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revoke() {
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this.lineData.pop()
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this.lineData.forEach((item, index) => {
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} else {
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startPos = coordinates[coordinatesLen - 2]
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endPos = coordinates[coordinatesLen - 1]
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}
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const style = currentLineData.style
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canvasCtx.beginPath()
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canvasCtx.setLineCap('round')
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canvasCtx.setStrokeStyle(item.style.color)
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canvasCtx.setLineWidth(item.style.width)
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item.coordinates.forEach(pos => {
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if (pos.type == 'touchstart') {
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canvasCtx.moveTo(pos.x, pos.y)
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} else {
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canvasCtx.lineTo(pos.x, pos.y)
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}
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})
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canvasCtx.setStrokeStyle(style.color)
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canvasCtx.setLineWidth(style.width)
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canvasCtx.moveTo(startPos.x, startPos.y)
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canvasCtx.lineTo(endPos.x, endPos.y)
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// const P1 = this.caculateBezier(startPos, endPos, centerPos)
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// console.log(P1.x, P1.y)
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// canvasCtx.moveTo(startPos.x, startPos.y)
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// canvasCtx.quadraticCurveTo(P1.x, P1.y, endPos.x, endPos.y)
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canvasCtx.stroke()
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})
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canvasCtx.draw()
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},
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// 绘制线条
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drawLine() {
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const lineDataLen = this.lineData.length
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if (!lineDataLen) return
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const currentLineData = this.lineData[lineDataLen - 1]
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const coordinates = currentLineData.coordinates
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const coordinatesLen = coordinates.length
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if (!coordinatesLen) return
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let startPos
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let endPos
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if (coordinatesLen < 2) {
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// only start, no move event
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startPos = coordinates[coordinatesLen - 1]
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endPos = { x: startPos.x + 1, y: startPos.y }
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} else {
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startPos = coordinates[coordinatesLen - 2]
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endPos = coordinates[coordinatesLen - 1]
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}
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const style = currentLineData.style
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canvasCtx.beginPath()
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canvasCtx.setLineCap('round')
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canvasCtx.setStrokeStyle(style.color)
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canvasCtx.setLineWidth(style.width)
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canvasCtx.moveTo(startPos.x, startPos.y)
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canvasCtx.lineTo(endPos.x, endPos.y)
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// const P1 = this.caculateBezier(startPos, endPos, centerPos)
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// console.log(P1.x, P1.y)
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// canvasCtx.moveTo(startPos.x, startPos.y)
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// canvasCtx.quadraticCurveTo(P1.x, P1.y, endPos.x, endPos.y)
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canvasCtx.stroke()
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canvasCtx.draw(true)
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},
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canvasToTempFilePath(conf = {}) {
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return new Promise((resolve, reject) => {
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uni.canvasToTempFilePath(
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{
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canvasId: this.cid,
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...conf,
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success: res => {
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resolve(res.tempFilePath)
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canvasCtx.draw(true)
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},
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canvasToTempFilePath(conf = {}) {
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return new Promise((resolve, reject) => {
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uni.canvasToTempFilePath({
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canvasId: this.cid,
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...conf,
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success: res => {
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resolve(res.tempFilePath)
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},
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fail: err => {
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console.log('fail', err)
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reject(err)
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}
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},
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fail: err => {
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console.log('fail', err)
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reject(err)
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}
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},
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this
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)
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})
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},
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setLineWidth(numberVal) {
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this.penLineWidth = numberVal
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},
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provideInterface() {
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return {
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cid: this.cid,
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ctx: canvasCtx,
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clear: this.clear,
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revoke: this.revoke,
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canvasToTempFilePath: this.canvasToTempFilePath,
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setLineWidth: this.setLineWidth
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this
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)
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})
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},
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setLineWidth(numberVal) {
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this.penLineWidth = numberVal
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},
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provideInterface() {
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return {
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cid: this.cid,
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ctx: canvasCtx,
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clear: this.clear,
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revoke: this.revoke,
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canvasToTempFilePath: this.canvasToTempFilePath,
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setLineWidth: this.setLineWidth
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}
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},
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/**
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* 计算二次贝塞尔曲线 控制点 P1
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* 起点 P0(x0,y0)、控制点P1(x1, y1)、P2(x2, y2)、曲线上任意点B(x, y)
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* 二次贝塞尔公式：B(t) = (1-t)²P0 + 2t(1-t)P1 + t²P2
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* 代入坐标得：
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* x = (1-t)²*x0 + 2t(1-t)*x1 + t²*x2
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* y = (1-t)²*y0 + 2t(1-t)*y1 + t²*y2
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*/
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caculateBezier(P0, P2, B, t = 0.5) {
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const {
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x: x0,
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y: y0
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} = P0
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const {
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x: x2,
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y: y2
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} = P2
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const {
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x,
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y
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} = B
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let x1 = (x - (1 - t) * (1 - t) * x0 - t * t * x2) / (2 * t * (1 - t))
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let y1 = (y - (1 - t) * (1 - t) * y0 - t * t * y2) / (2 * t * (1 - t))
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return {
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x: x1,
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y: y1
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}
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}
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},
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/**
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* 计算二次贝塞尔曲线 控制点 P1
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* 起点 P0(x0,y0)、控制点P1(x1, y1)、P2(x2, y2)、曲线上任意点B(x, y)
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* 二次贝塞尔公式：B(t) = (1-t)²P0 + 2t(1-t)P1 + t²P2
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* 代入坐标得：
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* x = (1-t)²*x0 + 2t(1-t)*x1 + t²*x2
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* y = (1-t)²*y0 + 2t(1-t)*y1 + t²*y2
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*/
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caculateBezier(P0, P2, B, t = 0.5) {
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const { x: x0, y: y0 } = P0
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const { x: x2, y: y2 } = P2
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const { x, y } = B
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let x1 = (x - (1 - t) * (1 - t) * x0 - t * t * x2) / (2 * t * (1 - t))
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let y1 = (y - (1 - t) * (1 - t) * y0 - t * t * y2) / (2 * t * (1 - t))
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return { x: x1, y: y1 }
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}
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}
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}
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</script>
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<style lang="scss" scoped>
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.signature-wrap {
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position: relative;
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}
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.signature-wrap {
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position: relative;
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}
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</style>
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@ -51,7 +51,8 @@
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"path": "pages/confirmCompletion/confirmCompletion",
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"style": {
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"navigationBarTitleText": "当前工单",
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"enablePullDownRefresh": false
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"enablePullDownRefresh": false,
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"disableScroll": true
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}
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}, {
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"path": "pages/taskReturn/taskReturn",
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@ -72,7 +72,7 @@
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<view class="attendantImg" style="border-bottom: 1rpx solid #BAB7B8;">
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用户签名
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</view>
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<!-- <view class="receive">
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<!-- <view class="receive">
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我确认已接受服务
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</view> -->
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<view class="uppicture" @tap='show=true'>
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@ -101,8 +101,14 @@
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</view>
|
||||
</view>
|
||||
</u-popup>
|
||||
<u-mask :show="show" @click="show = false">
|
||||
<!-- <u-popup v-model="show" mode='bottom' :closeable='true' :safe-area-inset-bottom='true' @touchmove.stop.prevent
|
||||
height='900'>
|
||||
<signature @userSignaturePictureUrl='userSignaturePicture' @click.native.stop
|
||||
style='background-color: #F4F5F7;width: 100%;height: 800rpx;'>
|
||||
</signature>
|
||||
</u-popup> -->
|
||||
<u-mask :show="show" @click="show = false" @touchmove.stop.prevent>
|
||||
<signature @userSignaturePictureUrl='userSignaturePicture' @click.native.stop v-if='show'
|
||||
style='background-color: #F4F5F7;position:absolute;bottom:0%;width: 100%;height: 800rpx;'></signature>
|
||||
</u-mask>
|
||||
<u-toast ref="uToast" />
|
||||
@ -284,7 +290,9 @@
|
||||
<style lang="scss">
|
||||
.app {
|
||||
font-size: 36rpx;
|
||||
padding: 0 0 100rpx;
|
||||
padding: 0;
|
||||
overflow: scroll;
|
||||
height: 100vh;
|
||||
|
||||
.finishmask {
|
||||
height: 300rpx;
|
||||
|
||||
@ -1,5 +1,5 @@
|
||||
<template>
|
||||
<view class="" style="background-color: #F4F5F7;">
|
||||
<view class="" style="background-color: #F4F5F7;" @touchmove.stop.prevent>
|
||||
<Signature @init="onSignInit" style='background-color: #fff;'></Signature>
|
||||
<view class="btns">
|
||||
<button @click="clear">清空</button>
|
||||
|
||||
Loading…
Reference in New Issue
Block a user