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electron實現(xiàn)靜默打印的示例代碼

發(fā)布時間:2020-09-09 11:19:48 來源:腳本之家 閱讀:194 作者:乖摸摸頭 欄目:web開發(fā)

前言

electron+vuecli3 實現(xiàn)設(shè)置打印機,靜默打印小票功能

網(wǎng)上相關(guān)的資料比較少,這里給大家分享一下,希望大家可以少踩一些坑
github地址

必須要強調(diào)一下的是electron的版本必須是3.0.0不能,我嘗試了4和5都沒有實現(xiàn)

效果圖

electron實現(xiàn)靜默打印的示例代碼

electron實現(xiàn)靜默打印的示例代碼

使用

git clone https://github.com/sunnie1992/electron-vue-print-demo.git
npm install
npm run electron:serve

實現(xiàn)

操作思路
1.用戶點擊打印
2.查詢本地electron-store(用來向本地存儲,讀取數(shù)據(jù))是否存打印機名稱
3.已經(jīng)設(shè)置,直接打印
4.沒有設(shè)置,彈出設(shè)置打印機框
5.用戶設(shè)置好確認后打印

首頁App.vue引入了兩個組件,一個是主動設(shè)置打印機的彈出printDialog

electron實現(xiàn)靜默打印的示例代碼

另外一個是打印組件,打印是通過webview將需要打印的內(nèi)容渲染到html頁面然后就能打印了

<template>
 <div id="app">
  <el-button type="primary" @click="showPrint">設(shè)置打印機</el-button>
  <printDialog :dialog-visible="dialogVisible" @cancel="handlePrintDialogCancel" />
  <pinter ref="print" :html-data="HtmlData"></pinter>
  <el-table :data="tableData" >
   <el-table-column prop="date" label="日期" width="180" column-key="date">
   </el-table-column>
   <el-table-column prop="name" label="姓名" width="180">
   </el-table-column>
   <el-table-column prop="address" label="地址">
   </el-table-column>
   <el-table-column label="操作">
    <template slot-scope="scope">
     <el-button type="primary" @click="doPrint(scope.row)">打印</el-button>
    </template>
   </el-table-column>
  </el-table>
 </div>
</template>
<script>
import { ipcRenderer } from 'electron'
import printDialog from './components/PrintDialog.vue'
import Pinter from './components/pinter.vue'
export default {
 name: 'App',
 components: {
  Pinter,
  printDialog
 },
 data() {
  return {
   dialogVisible: false,
   HtmlData: '',
   printList: [],
   tableData: [{
    date: '2016-05-02',
    name: '我是小仙女',
    address: '上海市浦東新區(qū)',
    tag: '家'
   }, {
    date: '2016-05-04',
    name: '我是小仙女1',
    address: '上海市浦東新區(qū)',
    tag: '公司'
   }, {
    date: '2016-05-01',
    name: '我是小仙女2',
    address: '上海市浦東新區(qū)',
    tag: '家'
   }, {
    date: '2016-05-03',
    name: '我是小仙女3',
    address: '上海市浦東新區(qū)',
    tag: '公司'
   }]
  }
 },
 mounted() {
 },
 methods: {
  showPrint() {
   this.dialogVisible = true
  },
  handlePrintDialogCancel() {
   this.dialogVisible = false
  },
  doPrint(row) {
   this.HtmlData = row.name
   this.$refs.print.print(row.name)
  }
 }
}
</script>

<style>
#app {
 font-family: 'Avenir', Helvetica, Arial, sans-serif;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 text-align: center;
 color: #2c3e50;
 margin-top: 60px;
}
</style>

APP.VUE 每次點擊打印按鈕后觸發(fā)組件的print方法并將數(shù)據(jù)傳過去 this.$refs.print.print(row.name)
printer.vue 查詢打印機,然后調(diào)用打印方法printRender。

<template>
 <div class="container">
  <webview id="printWebview" ref="printWebview" :src="fullPath" nodeintegration />
  <printDialog :dialog-visible="dialogVisible" @cancel="handlePrintDialogCancel" @select-print="printSelectAfter" />
 </div>
</template>
<script>
import { ipcRenderer } from 'electron'
import path from 'path'
import printDialog from './PrintDialog.vue'
export default {
 name: 'Pinter',
 components: {
  printDialog
 },
 props: {
  // HtmlData: {
  //  type: String,
  //  default: '',
  // },
 },
 data() {
  return {
   printList: [],
   dialogVisible: false,
   printDeviceName: '',
   fullPath: path.join(__static, 'print.html'),
   messageBox: null,
   htmlData: ''
  }
 },

 mounted() {
  const webview = this.$refs.printWebview
  webview.addEventListener('ipc-message', (event) => {
   if (event.channel === 'webview-print-do') {
    console.log(this.printDeviceName)
    webview.print(
     {
      silent: true,
      printBackground: true,
      deviceName: this.printDeviceName
     },
     (data) => {
      this.messageBox.close()
      if (data) {
       this.$emit('complete')
      } else {
       this.$emit('cancel')
      }
     },
    )
   }
  })
 },
 methods: {
  print(val) {
   this.htmlData = val
   this.getPrintListHandle()
  },
  // 獲取打印機列表
  getPrintListHandle() {
   // 改用ipc異步方式獲取列表,解決打印列數(shù)量多的時候?qū)е驴ㄋ赖膯栴}
   ipcRenderer.send('getPrinterList')
   ipcRenderer.once('getPrinterList', (event, data) => {
    // 過濾可用打印機
    this.printList = data.filter(element => element.status === 0)
    // 1.判斷是否有打印服務(wù)
    if (this.printList.length <= 0) {
     this.$message({
      message: '打印服務(wù)異常,請嘗試重啟電腦',
      type: 'error'
     })
     this.$emit('cancel')
    } else {
     this.checkPrinter()
    }
   })
  },
  // 2.判斷打印機狀態(tài)
  checkPrinter() {
   // 本地獲取打印機
   const printerName = this.$electronStore.get('printForm') || ''
   const printer = this.printList.find(device => device.name === printerName)
   // 有打印機設(shè)備并且狀態(tài)正常直接打印
   if (printer && printer.status === 0) {
    this.printDeviceName = printerName
    this.printRender()
   } else if (printerName === '') {
    this.$message({
     message: '請先設(shè)置其他打印機',
     type: 'error',
     duration: 1000,
     onClose: () => {
      this.dialogVisible = true
     }
    })
    this.$emit('cancel')
   } else {
    this.$message({
     message: '當前打印機不可用,請重新設(shè)置',
     type: 'error',
     duration: 1000,
     onClose: () => {
      this.dialogVisible = true
     }
    })

   }
  },

  handlePrintDialogCancel() {
   this.$emit('cancel')
   this.dialogVisible = false
  },
  printSelectAfter(val) {
   this.dialogVisible = false
   this.$electronStore.set('printForm', val.name)
   this.printDeviceName = val.name
   this.printRender()
  },
  printRender(html) {
   this.messageBox = this.$message({
    message: '打印中,請稍后',
    duration: 0
   })
   // 獲取<webview>節(jié)點
   const webview = this.$refs.printWebview
   // 發(fā)送信息到<webview>里的頁面
   webview.send('webview-print-render', {
    printName: this.printDeviceName,
    html: this.htmlData
   })
  }
 }
}
</script>
<style scoped>
.container {
 position: fixed;
 right: -500px;
}
</style>

public/print.html渲染webview頁面成功后發(fā)送打印指令

 <script>
  const { ipcRenderer } = require('electron')
  ipcRenderer.on('webview-print-render', (event, info) => {
   // 執(zhí)行渲染
   document.getElementById('bd').innerHTML = info.html
   ipcRenderer.sendToHost('webview-print-do')
  })
 </script>
 

這里用到了electron-store存取本地數(shù)據(jù)

background.js 引入 初始化掛載在global

import ElectronStore from 'electron-store'
// ElectronStore 默認數(shù)據(jù)
import electronDefaultData from './config/electron-default-data'
let electronStore
app.on('ready', async() => {
 // 初始化配置文件
 electronStore = new ElectronStore({
  defaults: electronDefaultData,
  cwd: app.getPath('userData')
 })
 global.electronStore = electronStore
})

src/plugins/inject.js

注冊$electronStore

// eslint-disable-next-line
import { remote } from 'electron'
export default {
 /* eslint no-param-reassign: "error" */
 install(Vue) {
  Vue.prototype.$electronStore = remote.getGlobal('electronStore')
 
 }
}

然后你就可以在vue文件里讀取了

this.$electronStore.get('printForm') 和 this.$electronStore.set('printForm', val.name)

以上就是本文的全部內(nèi)容,希望對大家的學(xué)習有所幫助,也希望大家多多支持億速云。

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