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@@ -0,0 +1,558 @@
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+<template>
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+ <view class="lime-signature" :style="[canvasStyle, styles]" ref="limeSignature">
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+ <!-- #ifndef APP-VUE || APP-NVUE -->
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+ <canvas
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+ v-if="useCanvas2d"
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+ class="lime-signature__canvas"
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+ :id="canvasId"
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+ type="2d"
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+ :disableScroll="disableScroll"
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+ @touchstart="touchStart"
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+ @touchmove="touchMove"
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+ @touchend="touchEnd"
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+ ></canvas>
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+ <canvas
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+ v-else
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+ :disableScroll="disableScroll"
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+ class="lime-signature__canvas"
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+ :canvas-id="canvasId"
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+ :id="canvasId"
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+ @touchstart="touchStart"
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+ @touchmove="touchMove"
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+ @touchend="touchEnd"
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+ @mousedown="touchStart"
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+ @mousemove="touchMove"
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+ @mouseup="touchEnd"
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+ ></canvas>
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+ <!-- #endif -->
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+ <!-- #ifdef APP-VUE -->
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+ <view
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+ :id="canvasId"
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+ :disableScroll="disableScroll"
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+ :rparam="param"
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+ :change:rparam="sign.update"
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+
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+ :rclear="rclear"
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+ :change:rclear="sign.clear"
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+
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+ :rundo="rundo"
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+ :change:rundo="sign.undo"
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+
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+ :rsave="rsave"
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+ :change:rsave="sign.save"
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+
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+ :rempty="rempty"
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+ :change:rempty="sign.isEmpty"
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+
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+ ></view>
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+ <!-- #endif -->
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+ <!-- #ifdef APP-NVUE -->
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+ <web-view
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+ src="/uni_modules/lime-signature/static/index.html"
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+ class="lime-signature__canvas"
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+ ref="webview"
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+ @pagefinish="onPageFinish"
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+ @error="onError"
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+ @onPostMessage="onMessage"
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+ ></web-view>
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+ <!-- #endif -->
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+ </view>
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+</template>
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+<!-- #ifdef APP-VUE -->
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+<script module="sign" lang="renderjs">
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+// #ifdef APP-VUE
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+// import { Signature } from '@signature'
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+import { Signature } from './signature'
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+// import {base64ToPath} from './utils'
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+
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+export default {
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+ data() {
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+ return {
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+ canvasid: null,
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+ signature: null,
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+ observer: null,
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+ options: {},
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+ saveCount: 0,
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+ }
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+ },
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+ mounted() {
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+ this.$nextTick(this.init)
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+ },
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+ methods: {
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+ init() {
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+ const el = this.$refs.limeSignature;
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+ const canvas = document.createElement('canvas')
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+ canvas.style = 'width:100%; height: 100%;'
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+ el.appendChild(canvas)
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+ this.signature = new Signature({el: canvas})
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+ this.signature.pen.setOption(this.options)
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+ const width = this.signature.canvas.get('width')
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+ const height = this.signature.canvas.get('height')
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+
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+ this.emit({
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+ changeSize: {width, height}
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+ })
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+ },
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+ undo(v) {
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+ if(v && this.signature) {
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+ this.signature.undo()
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+ }
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+ },
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+ clear(v) {
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+ if(v && this.signature) {
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+ this.signature.clear()
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+ }
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+ },
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+ save(v) {
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+ if(v !== this.saveCount) {
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+ this.saveCount = v;
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+ const image = this.signature.canvas.get('el').toDataURL()
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+ const {backgroundColor } = this.options
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+ if(backgroundColor) {
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+ const canvas = document.createElement('canvas')
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+ const width = this.signature.canvas.get('width')
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+ const height = this.signature.canvas.get('height')
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+ const pixelRatio = this.signature.canvas.get('pixelRatio')
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+ canvas.width = width * pixelRatio
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+ canvas.height = height * pixelRatio
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+ const context = canvas.getContext('2d')
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+ context.scale(pixelRatio, pixelRatio)
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+ context.fillStyle = backgroundColor
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+ context.fillRect(0,0, width, height)
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+ context.drawImage(this.signature.canvas.get('el'), 0, 0, width, height)
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+ this.emit({save: canvas.toDataURL()})
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+ canvas.remove()
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+ } else {
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+ this.emit({save: image})
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+ }
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+
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+
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+
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+ // base64ToPath(image).then((res) => {
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+ // this.emit({save: res})
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+ // })
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+ }
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+ },
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+ isEmpty(v) {
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+ if(v && this.signature) {
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+ const isEmpty = this.signature.isEmpty()
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+ this.emit({isEmpty})
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+ }
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+ },
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+ emit(event) {
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+ this.$ownerInstance.callMethod('onMessage', {
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+ detail: {
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+ data: [
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+ {
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+ event
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+ }
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+ ]
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+ }
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+ })
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+ },
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+ update(v) {
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+ if(v) {
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+ if(this.signature) {
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+ this.options = v
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+ this.signature.pen.setOption(v)
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+ } else {
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+ this.options = v
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+ }
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+ }
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+ }
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+ }
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+}
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+// #endif
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+</script>
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+<!-- #endif -->
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+
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+
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+<script>
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+ // #ifndef APP-NVUE
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+ import {getCanvas2d, wrapEvent, requestAnimationFrame, sleep} from './utils'
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+ import {Signature} from './signature'
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+ // import {Signature} from '@signature';
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+ import {uniContext, createImage, toDataURL} from './context'
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+ // #endif
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+ import {base64ToPath} from './utils'
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+ export default {
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+ props: {
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+ styles: String,
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+ disableScroll: Boolean,
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+ type: {
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+ type: String,
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+ default: '2d'
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+ },
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+ // 画笔颜色
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+ penColor: {
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+ type: String,
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+ default: 'black'
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+ },
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+ penSize: {
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+ type: Number,
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+ default: 2
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+ },
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+ // 画板背景颜色
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+ backgroundColor: String,
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+ // 笔锋
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+ openSmooth: Boolean,
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+ // 画笔最小值
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+ minLineWidth: {
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+ type: Number,
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+ default: 2
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+ },
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+ // 画笔最大值
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+ maxLineWidth: {
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+ type: Number,
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+ default: 6
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+ },
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+ // 画笔达到最小宽度所需最小速度(px/ms)，取值范围1.0-10.0，值越小，画笔越容易变细，笔锋效果会比较明显，可以自行调整查看效果，选出自己满意的值。
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+ minSpeed: {
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+ type: Number,
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+ default: 1.5
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+ },
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+ // 相邻两线宽度增(减)量最大百分比，取值范围1-100，为了达到笔锋效果，画笔宽度会随画笔速度而改变，如果相邻两线宽度差太大，过渡效果就会很突兀，使用maxWidthDiffRate限制宽度差，让过渡效果更自然。可以自行调整查看效果，选出自己满意的值。
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+ maxWidthDiffRate: {
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+ type: Number,
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+ default: 20
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+ },
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+ // 限制历史记录数，即最大可撤销数，传入0则关闭历史记录功能
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+ maxHistoryLength: {
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+ type: Number,
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+ default: 20
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+ },
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+ beforeDelay: {
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+ type: Number,
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+ default: 0
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+ }
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+ },
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+ data() {
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+ return {
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+ canvasWidth: null,
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+ canvasHeight: null,
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+ useCanvas2d: true,
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+ // #ifdef APP-PLUS
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+ rclear: 0,
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+ rundo: 0,
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+ rsave: 0,
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+ rempty: 0,
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+ risEmpty: true,
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+ toDataURL: null,
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+ tempFilePath: [],
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+ // #endif
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+ }
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+ },
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+ computed: {
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+ canvasId() {
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+ return `lime-signature${this._uid||this._.uid}`
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+ },
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+ canvasStyle() {
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+ const {canvasWidth, canvasHeight, backgroundColor} = this
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+ return {
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+ width: canvasWidth && (canvasWidth + 'px'),
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+ height: canvasHeight && (canvasHeight + 'px'),
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+ background: backgroundColor
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+ }
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+ },
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+ param() {
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+ const {penColor, penSize, backgroundColor, openSmooth, minLineWidth, maxLineWidth, minSpeed, maxWidthDiffRate, maxHistoryLength, disableScroll} = this
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+ return JSON.parse(JSON.stringify({penColor, penSize, backgroundColor, openSmooth, minLineWidth, maxLineWidth, minSpeed, maxWidthDiffRate, maxHistoryLength, disableScroll}))
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+ }
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+ },
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+ // #ifdef APP-NVUE
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+ watch: {
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+ param(v) {
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+ this.$refs.webview.evalJS(`update(${JSON.stringify(v)})`)
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+ }
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+ },
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+ // #endif
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+ // #ifndef APP-PLUS
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+ created() {
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+ this.useCanvas2d = this.type=== '2d' && getCanvas2d()
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+ },
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+ // #endif
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+ // #ifndef APP-PLUS
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+ async mounted() {
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+ if(this.beforeDelay) {
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+ await sleep(this.beforeDelay)
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+ }
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+ const config = await this.getContext()
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+ this.signature = new Signature(config)
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+ this.canvasEl = this.signature.canvas.get('el')
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+ this.canvasWidth = this.signature.canvas.get('width')
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+ this.canvasHeight = this.signature.canvas.get('height')
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+
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+ this.stopWatch = this.$watch('param' , (v) => {
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+ this.signature.pen.setOption(v)
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+ }, {immediate: true})
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+ },
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+ // #endif
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+ // #ifndef APP-PLUS
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+ // #ifdef VUE3
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+ beforeUnmount() {
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+ this.stopWatch()
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+ this.signature.destroy()
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+ },
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+ // #endif
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+ // #ifdef VUE2
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+ beforeDestroy() {
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+ this.stopWatch()
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+ this.signature.destroy()
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+ },
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+ // #endif
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+ // #endif
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+ methods: {
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+ // #ifdef APP-PLUS
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+ onPageFinish() {
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+ this.$refs.webview.evalJS(`update(${JSON.stringify(this.param)})`)
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+ },
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+ onMessage(e = {}) {
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+ const {detail: {data: [res]}} = e
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+ if(res.event?.save) {
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+ this.toDataURL = res.event.save
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+ }
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+ if(res.event?.changeSize) {
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+ const {width, height} = res.event.changeSize
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+ }
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+ if(res.event.hasOwnProperty('isEmpty')) {
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+ this.risEmpty = res.event.isEmpty
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+ }
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+ if (res.event?.file) {
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+ this.tempFilePath.push(res.event.file)
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+ if (this.tempFilePath.length > 7) {
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+ this.tempFilePath.shift()
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+ }
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+ return
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+ }
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+ if (res.event?.success) {
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+ if (res.event.success) {
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+ this.tempFilePath.push(res.event.success)
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+ if (this.tempFilePath.length > 8) {
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+ this.tempFilePath.shift()
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+ }
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+ this.toDataURL = this.tempFilePath.join('')
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+ this.tempFilePath = []
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+ // base64ToPath(this.tempFilePath.join('')).then(res => {
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+
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+ // })
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+ } else {
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+ this.$emit('fail', 'canvas no data')
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+ }
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+ return
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+ }
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+ },
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+ // #endif
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+ undo() {
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+ // #ifdef APP-VUE || APP-NVUE
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+ this.rundo += 1
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+ // #endif
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+ // #ifdef APP-NVUE
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+ this.$refs.webview.evalJS(`undo()`)
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+ // #endif
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+ // #ifndef APP-VUE
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+ if(this.signature)
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+ this.signature.undo()
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+ // #endif
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+ },
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+ clear() {
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+ // #ifdef APP-VUE || APP-NVUE
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+ this.rclear += 1
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+ // #endif
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+ // #ifdef APP-NVUE
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+ this.$refs.webview.evalJS(`clear()`)
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+ // #endif
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+ // #ifndef APP-VUE
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+ if(this.signature)
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+ this.signature.clear()
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+ // #endif
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+ },
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+ isEmpty() {
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+ // #ifdef APP-NVUE
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+ this.$refs.webview.evalJS(`isEmpty()`)
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+ // #endif
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+ // #ifdef APP-VUE || APP-NVUE
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+ this.rempty += 1
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+ // #endif
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+ // #ifndef APP-VUE || APP-NVUE
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+ return this.signature.isEmpty()
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+ // #endif
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+ },
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+ canvasToTempFilePath(param) {
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+ const isEmpty = this.isEmpty()
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+ // #ifdef APP-NVUE
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+ this.$refs.webview.evalJS(`save()`)
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+ // #endif
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+ // #ifdef APP-VUE || APP-NVUE
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+ const stopURLWatch = this.$watch('toDataURL', (v, n) => {
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+ if(v && v !== n) {
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+ if(param.pathType == 'url') {
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+ base64ToPath(v).then(res => {
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+ param.success({tempFilePath: res,isEmpty: this.risEmpty })
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+ })
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+ } else {
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+ param.success({tempFilePath: v,isEmpty: this.risEmpty })
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+ }
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+ this.toDataURL = ''
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+ }
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+ stopURLWatch && stopURLWatch()
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+ })
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+ this.rsave += 1
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+ // #endif
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+ // #ifndef APP-VUE || APP-NVUE
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+ const success = (success) => param.success && param.success(success)
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+ const fail = (fail) => param.fail && param.fail(err)
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+ const {canvas} = this.signature.canvas.get('el')
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+ const context = this.signature.canvas.get('context')
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+ const {backgroundColor} = this
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+ const width = this.signature.canvas.get('width')
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+ const height = this.signature.canvas.get('height')
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+
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+ if(this.useCanvas2d) {
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+ try{
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+ // #ifndef MP-ALIPAY
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+ const tempFilePath = canvas.toDataURL()
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+ if(backgroundColor) {
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+ const image = canvas.createImage()
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+ image.src = tempFilePath
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+ image.onload = () => {
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+ context.fillStyle = backgroundColor
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+ context.fillRect(0, 0, width, height)
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+ context.drawImage(image, 0, 0, width, height);
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+ const tempFilePath = canvas.toDataURL()
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+ success({tempFilePath, isEmpty})
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+ context.clearRect(0,0, width, height)
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+ context.drawImage(image, 0, 0, width, height);
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+ }
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+ } else {
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+ success({tempFilePath, isEmpty})
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+ }
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+ // #endif
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+ // #ifdef MP-ALIPAY
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+ canvas.toTempFilePath({
|
|
|
+ canvasid: this.canvasid,
|
|
|
+ success(res){
|
|
|
+ if(backgroundColor) {
|
|
|
+ const image = canvas.createImage()
|
|
|
+ image.src = tempFilePath
|
|
|
+ image.onload = () => {
|
|
|
+ canvas.toTempFilePath({
|
|
|
+ canvasid: this.canvasid,
|
|
|
+ success(res) {
|
|
|
+ context.fillStyle = backgroundColor
|
|
|
+ context.fillRect(0, 0, width, height)
|
|
|
+ context.drawImage(image, 0, 0, width, height);
|
|
|
+ success({tempFilePath, isEmpty})
|
|
|
+ context.clearRect(0,0, width, height)
|
|
|
+ context.drawImage(image, 0, 0, width, height);
|
|
|
+ }
|
|
|
+ })
|
|
|
+
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ success({tempFilePath: res, isEmpty})
|
|
|
+ }
|
|
|
+ },
|
|
|
+ fail
|
|
|
+ })
|
|
|
+ // #endif
|
|
|
+ }catch(err){
|
|
|
+ console.warn(err)
|
|
|
+ fail(err)
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ toDataURL(this.canvasId, this).then(res => {
|
|
|
+ if(backgroundColor) {
|
|
|
+ const image = createImage()
|
|
|
+ image.src = res
|
|
|
+ image.onload = () => {
|
|
|
+ context.fillStyle = backgroundColor
|
|
|
+ context.fillRect(0, 0, width, height)
|
|
|
+ context.drawImage(image, 0, 0, width, height);
|
|
|
+ context.draw && context.draw(true, () => {
|
|
|
+ toDataURL(this.canvasId, this).then(res => {
|
|
|
+ success({tempFilePath: res, isEmpty})
|
|
|
+ context.clearRect(0,0, width, height)
|
|
|
+ context.drawImage(image, 0, 0, width, height);
|
|
|
+ context.draw && context.draw(true)
|
|
|
+ })
|
|
|
+ });
|
|
|
+
|
|
|
+ }
|
|
|
+ } else {
|
|
|
+ success({tempFilePath: res, isEmpty})
|
|
|
+ }
|
|
|
+ }).catch(err => {
|
|
|
+ console.warn(err)
|
|
|
+ fail(err)
|
|
|
+ })
|
|
|
+ }
|
|
|
+ // #endif
|
|
|
+ },
|
|
|
+ // #ifndef APP-PLUS
|
|
|
+ getContext() {
|
|
|
+ const {pixelRatio} = uni.getSystemInfoSync()
|
|
|
+ return new Promise(resolve => {
|
|
|
+ if(this.useCanvas2d) {
|
|
|
+ uni.createSelectorQuery().in(this)
|
|
|
+ .select(`#${this.canvasId}`)
|
|
|
+ .fields({
|
|
|
+ node: true,
|
|
|
+ size: true,
|
|
|
+ rect: true,
|
|
|
+ })
|
|
|
+ .exec(res => {
|
|
|
+ if(res) {
|
|
|
+ const {width, height, node, left, top, right} = res[0]
|
|
|
+ const context = node.getContext('2d')
|
|
|
+ node.width = width * pixelRatio;
|
|
|
+ node.height = height * pixelRatio;
|
|
|
+ resolve({ left, top, right, width, height, context, canvas: node, pixelRatio})
|
|
|
+ }
|
|
|
+ })
|
|
|
+ } else {
|
|
|
+ uni.createSelectorQuery().in(this)
|
|
|
+ .select(`#${this.canvasId}`)
|
|
|
+ .boundingClientRect()
|
|
|
+ .exec(res => {
|
|
|
+ if(res) {
|
|
|
+ const {width, height, left, top, right} = res[0]
|
|
|
+ const context = uniContext(uni.createCanvasContext(this.canvasId, this))
|
|
|
+ const canvas = {
|
|
|
+ createImage,
|
|
|
+ toDataURL: () => toDataURL(this.canvasId, this),
|
|
|
+ requestAnimationFrame
|
|
|
+ }
|
|
|
+ resolve({ left, top, right, width, height, context, pixelRatio:1, canvas})
|
|
|
+ }
|
|
|
+ })
|
|
|
+ }
|
|
|
+ })
|
|
|
+ },
|
|
|
+ touchStart(e) {
|
|
|
+ if(!this.canvasEl) return
|
|
|
+ this.isStart = true
|
|
|
+ this.canvasEl.dispatchEvent('touchstart', wrapEvent(e))
|
|
|
+ },
|
|
|
+ touchMove(e) {
|
|
|
+ if(!this.canvasEl || !this.isStart && this.canvasEl) return
|
|
|
+ this.canvasEl.dispatchEvent('touchmove', wrapEvent(e))
|
|
|
+ },
|
|
|
+ touchEnd(e) {
|
|
|
+ if(!this.canvasEl) return
|
|
|
+ this.isStart = false
|
|
|
+ this.canvasEl.dispatchEvent('touchend', wrapEvent(e))
|
|
|
+ },
|
|
|
+ // #endif
|
|
|
+ }
|
|
|
+ }
|
|
|
+</script>
|
|
|
+<style lang="stylus">
|
|
|
+ .lime-signature,.lime-signature__canvas
|
|
|
+ // #ifndef APP-NVUE
|
|
|
+ width: 100%;
|
|
|
+ height: 100%
|
|
|
+ // #endif
|
|
|
+ // #ifdef APP-NVUE
|
|
|
+ flex: 1;
|
|
|
+ // #endif
|
|
|
+</style>
|
wkyy