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- <template>
- <div class="common-pdfView-modal">
- <div>
- <div id="canvas"></div>
- <div class="tools">
- <div>
- 调整比例:{{ Math.round(scalVal*100) }}%
- <div>
- <u-button :disabled="scalLoading" style="margin-right: 10px;" size="mini" @click="setScalVal(0)"><a-icon type="minus" /> 缩小</u-button>
- <u-button :disabled="scalLoading" size="mini" @click="setScalVal(1)"><a-icon type="plus" /> 放大</u-button>
- </div>
- </div>
- <div>
- <div v-if="hasClipboard">
- <u-button :disabled="scalLoading" size="mini" @click="handleCapture('export')"><a-icon type="export" /> 导出图片</u-button>
- </div>
- </div>
- <div>
- </div>
- </div>
- <div :style="{width: '100%',height: '70vh',margin:'0 auto',padding: '10px 0',overflow:'auto'}">
- <div v-if="loadedRatio > 0 && loadedRatio < 1" style="background-color: green; color: white; text-align: center" :style="{ width: loadedRatio * 100 + '%' }">{{ Math.floor(loadedRatio * 100) }}%</div>
- <pdf
- ref="pdf"
- v-for="(item,index) in pdfList"
- :key="'pdf-'+index"
- :style="{width: Math.round(scalVal*100)+'%',margin:'0 auto'}"
- :src="getUrl('data:application/pdf;base64,' + item)"
- :page="page"
- :rotate="rotate"
- @error="error"
- ></pdf>
- </div>
- </div>
- <div class="btn-box">
- <u-button size="large" style="margin-right: 25px;" @click="handleCommonCancel">取消</u-button>
- <u-button size="large" style="margin-right: 25px;" type="default" @click="handleCapture(hasClipboard?'copy':'export')">
- {{ hasClipboard?'复制截图':'导出图片' }}
- </u-button>
- </div>
- </div>
- </template>
- <script>
- import moment from 'moment'
- import pdf from 'vue-pdf-signature'
- import CMapReaderFactory from 'vue-pdf-signature/src/CMapReaderFactory.js'
- export default {
- components: {
- pdf
- },
- name: 'PdfView',
- data () {
- return {
- scalLoading: false,
- pdfAllLoad: 0,
- scalVal: 0.75,
- show: true,
- pdfList: [],
- src: '',
- loadedRatio: 0,
- page: 1,
- numPages: 0,
- rotate: 0,
- curpage: 1,
- total: 3,
- }
- },
- computed: {
- hasClipboard () {
- return typeof ClipboardItem !== 'undefined'
- }
- },
- onload(opts){
- this.setData()
- },
- methods: {
- // 缩放
- setScalVal (t) {
- if (!this.scalLoading) {
- this.scalLoading = true
- this.scalVal = this.scalVal + (t ? 0.05 : -0.05)
- if (this.scalVal > 1) {
- this.scalVal = 1
- }
- if (this.scalVal < 0.5) {
- this.scalVal = 0.5
- }
- setTimeout(() => {
- this.scalLoading = false
- }, 1000)
- }
- },
- getUrl (item) {
- const src = pdf.createLoadingTask({ url: item, CMapReaderFactory })
- return src
- },
- setData () {
- this.pdfList = this.$store.state.vuex_tempData
- this.curpage = 1
- this.total = data.length
- },
- error: function (err) {
- console.log(err)
- },
- // 取消
- handleCommonCancel () {
- this.pdfList = []
- uni.navigateBack()
- },
- // 截图
- handleCapture (type) {
- if (this.scalLoading) { return }
- const pdf = this.$refs.pdf
- const len = pdf.length
- const imgsList = []
- const canvas = document.createElement('canvas')
- let maxHeight = 0
- const maxWidth = pdf[0].$refs.canvas.width
- for (let i = 0; i < len; i++) {
- const imgs = pdf[i].$refs.canvas
- maxHeight = maxHeight + imgs.height
- imgsList.push(imgs)
- }
- // 设置画布宽度和高度
- canvas.width = maxWidth
- canvas.height = maxHeight
- const ctx = canvas.getContext('2d')
- // 开始合并
- let y = 0
- imgsList.map(item => {
- ctx.drawImage(item, 0, y, item.width, item.height)
- y = y + item.height
- })
- const base64Str = canvas.toDataURL('image/png')
- // 复制图片
- if (type == 'copy') {
- this.copyImgBtn(base64Str)
- }
- // 下载图片
- if (type == 'export') {
- const fileName = moment().format('YYYYMMDDHHmmss')
- this.downloadFile(fileName, base64Str)
- }
- // 清除画布
- ctx.clearRect(0, 0, maxWidth, maxHeight)
- },
- downloadFile (fileName, base64Data) {
- const aLink = document.createElement('a')
- const blob = this.convertBase64ToBlob(base64Data.split(',')[1], 'image/png')
- const evt = document.createEvent('HTMLEvents')
- // initEvent 不加后两个参数在FF下会报错 事件类型,是否冒泡,是否阻止浏览器的默认行为
- evt.initEvent('click', true, true)
- aLink.download = fileName
- aLink.href = URL.createObjectURL(blob)
- aLink.click()
- },
- // 将照片复制到剪贴版
- copyImgBtn (base64Data) {
- const blobInput = this.convertBase64ToBlob(base64Data.split(',')[1], 'image/png')
- if (navigator.clipboard) {
- const clipboardItemInput = new ClipboardItem({ 'image/png': blobInput })
- navigator.clipboard.write([clipboardItemInput])
- this.$message.success('截图成功,可以右键去粘贴图片!')
- } else {
- const image = nativeImageElectron.createFromDataURL(base64Data)
- clipboardElectron.writeImage(image)
- this.$message.success('截图成功,可以右键去粘贴图片!')
- }
- },
- convertBase64ToBlob (base64, type) {
- var bytes = window.atob(base64)
- var ab = new ArrayBuffer(bytes.length)
- var ua = new Uint8Array(ab)
- for (var i = 0; i < bytes.length; i++) {
- ua[i] = bytes.charCodeAt(i)
- }
- return new Blob([ab], { type: type })
- }
- },
- watch: {
- }
- }
- </script>
- <style lang="less">
- .common-pdfView-modal{
- background-color: #666;
- .tools{
- padding: 10px;
- display: flex;
- align-items: center;
- border-bottom: 1px solid #eee;
- background-color: #f8f8f8;
- justify-content: space-between;
- > div{
- display: flex;
- align-items: center;
- >div{
- padding: 0 10px;
- }
- }
- }
- .btn-box{
- text-align: center;
- margin-top: 20px;
- }
- }
- </style>
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