133 lines
3.1 KiB
JavaScript
133 lines
3.1 KiB
JavaScript
// #ifdef APP-VUE
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// import { Signature } from '@signature'
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import { Signature } from './signature'
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import { isTransparent } from './utils'
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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||this.$ownerInstance.$el;
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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({
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el: canvas
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})
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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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this.emit({
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changeSize: {
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width,
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height
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}
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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(param) {
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let {fileType = 'png', quality = 1, n} = JSON.parse(param)
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const type = `image/${fileType}`.replace(/jpg/, 'jpeg');
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if (n !== this.saveCount) {
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this.saveCount = n;
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const {backgroundColor, landscape, boundingBox} = this.options
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const flag = landscape || backgroundColor || boundingBox
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const image = this.signature.canvas.get('el').toDataURL(!flag && type, !flag && quality)
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if (flag) {
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const canvas = document.createElement('canvas')
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const pixelRatio = this.signature.canvas.get('pixelRatio')
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let width = this.signature.canvas.get('width')
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let height = this.signature.canvas.get('height')
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let x = 0
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let y = 0
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const next = () => {
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const size = [width, height]
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if(landscape) {size.reverse()}
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canvas.width = size[0] * pixelRatio
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canvas.height = size[1] * pixelRatio
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const param = [x, y, width, height, 0 , 0, width, height].map(item => item * pixelRatio)
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const context = canvas.getContext('2d')
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if (landscape) {
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context.translate(0, width * pixelRatio)
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context.rotate(-Math.PI / 2)
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}
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if (backgroundColor && !isTransparent(backgroundColor)) {
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context.fillStyle = backgroundColor
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context.fillRect(0, 0, width * pixelRatio, height * pixelRatio)
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}
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// param
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context.drawImage(this.signature.canvas.get('el'), ...param)
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this.emit({
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save: canvas.toDataURL(type, quality)
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})
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canvas.remove()
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}
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if(boundingBox) {
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const res = this.signature.getContentBoundingBox()
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width = res.width
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height = res.height
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x = res.startX
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y = res.startY
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next()
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} else {
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next()
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}
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} else {
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this.emit({
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save: image
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})
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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({
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isEmpty
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})
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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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event
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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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