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| <template>
| <!--本文件由FirstUI授权予四川政采招投标咨询有限公司（会员ID：1 63，营业执照号：9 151 01 3 1 332 00 61 9 3K）专用，请尊重知识产权，勿私下传播，违者追究法律责任。-->
| <!-- #ifdef APP-NVUE -->
| <gcanvas @longpress="longtap" @touchstart="touchstart" @touchend="touchend" :ref="canvasId"
| :style="{ width: w + 'px', height:h + 'px' }">
| </gcanvas>
| <!-- #endif -->
|
| <!-- #ifdef MP-QQ -->
| <canvas canvas-id="canvas_barcode" :style="{width:w+'px',height:h+'px'}" @longtap="longtap" @touchstart="touchstart"
| @touchend="touchend"></canvas>
| <!-- #endif -->
|
| <!-- #ifdef MP-WEIXIN -->
| <canvas type="2d" :canvas-id="canvasId" :id="canvasId" :style="{width:w+'px',height:h+'px'}" @longtap="longtap"
| @touchstart="touchstart" @touchend="touchend" v-if="canvasId"></canvas>
| <!-- #endif -->
|
| <!-- #ifndef APP-NVUE || MP-QQ || MP-WEIXIN -->
| <canvas :canvas-id="canvasId" :id="canvasId" :style="{width:w+'px',height:h+'px'}" @longtap="longtap"
| @touchstart="touchstart" @touchend="touchend" v-if="canvasId"></canvas>
| <!-- #endif -->
|
|
| </template>
|
| <script>
| import barcode from './barcode.js'
| import {
| code128
| } from './barcode-code128.js';
|
|
| // #ifdef APP-NVUE
| import {
| enable,
| WeexBridge
| } from './gcanvas/index.js';
| // #endif
| const defalutOptions = {
| number: true,
| prefix: true,
| color: '#181818',
| debug: false,
| onValid() {},
| onInvalid() {},
| onSuccess() {},
| onError() {}
| }
| // #ifdef MP-WEIXIN
| const canvasId = `fui_bc_${Math.ceil(Math.random() * 10e5).toString(36)}`
| // #endif
|
| // #ifdef MP-QQ
| const canvasId = 'canvas_barcode'
| // #endif
| export default {
| name: "fui-barcode",
| emits: ['ready', 'longclick', 'touchStart', 'touchEnd'],
| props: {
| width: {
| type: [Number, String],
| default: 480
| },
| height: {
| type: [Number, String],
| default: 200
| },
| value: {
| type: [Number, String],
| default: ''
| },
| //条形码类型:1-EAN-13 2-Code 128
| type: {
| type: [Number, String],
| default: 1
| }
| },
| data() {
| // #ifndef MP-WEIXIN || MP-QQ
| const canvasId = `fui_bc_${Math.ceil(Math.random() * 10e5).toString(36)}`
| // #endif
| return {
| canvasId,
| defalutOptions,
| w: 240,
| h: 100
| };
| },
| watch: {
| width(val) {
| this.w = uni.upx2px(val || 480)
| },
| height(val) {
| this.h = uni.upx2px(val || 200)
| }
| },
| created() {
| this.w = Math.round(uni.upx2px(this.width || 480))
| this.h = Math.round(uni.upx2px(this.height || 200))
| this.ctx = null;
| },
| mounted() {
| this.$nextTick(() => {
| setTimeout(() => {
| this.$emit('ready', {
| canvasId: this.canvasId
| })
| }, 50)
| });
| },
| // #ifndef VUE3
| beforeDestroy() {
| this.ctx = null;
| },
| // #endif
| // #ifdef VUE3
| beforeUnmount() {
| this.ctx = null;
| },
| // #endif
| methods: {
| // #ifdef MP-WEIXIN
| getContext(callback) {
| const query = uni.createSelectorQuery().in(this)
| query.select(`#${this.canvasId}`)
| .fields({
| node: true,
| size: true
| })
| .exec((res) => {
| const canvas = res[0].node
| const ctx = canvas.getContext('2d')
| const dpr = wx.getSystemInfoSync().pixelRatio
| canvas.width = res[0].width * dpr
| canvas.height = res[0].height * dpr
| ctx.scale(dpr, dpr)
| this.ctx = ctx;
| callback && callback()
| })
| },
| // #endif
| drawBarcode(options) {
| // #ifdef MP-WEIXIN
| this.ctx.clearRect(0, 0, this.w, this.h);
| // #endif
|
| if (!this.ctx) {
| // #ifdef APP-NVUE
| let ganvas = this.$refs[this.canvasId];
| /*通过元素引用获取canvas对象*/
| let canvasObj = enable(ganvas, {
| bridge: WeexBridge
| });
| /*获取绘图所需的上下文，暂不支持3d*/
| this.ctx = canvasObj.getContext('2d');
| // #endif
|
| // #ifndef APP-NVUE || MP-WEIXIN
| this.ctx = uni.createCanvasContext(this.canvasId, this)
| // #endif
| }
|
| if (this.type == 1) {
| const opts = Object.assign({}, this.defalutOptions, options)
| new barcode(String(this.value), Object.assign({
| width: this.w,
| height: this.h
| }, opts), this.ctx)
| } else {
| code128(this.ctx, String(this.value), this.w, this.h)
| }
| },
| draw(options = {}) {
| // #ifdef MP-WEIXIN
| if (!this.ctx) {
| this.getContext(() => {
| this.drawBarcode(options)
| })
| } else {
| this.drawBarcode(options)
| }
| // #endif
|
| // #ifndef MP-WEIXIN
| this.drawBarcode(options)
| // #endif
| },
| longtap() {
| this.$emit('longclick', {})
| },
| touchstart() {
| this.$emit('touchStart', {})
| },
| touchend() {
| this.$emit('touchEnd', {})
| }
| }
| }
| </script>
|
| <style scoped></style>
|
|
