electron实现静默打印的示例代码
程序员文章站
2022-11-16 11:33:42
前言
electron+vuecli3 实现设置打印机，静默打印小票功能
网上相关的资料比较少，这里给大家分享一下，希望大家可以少踩一些坑
必须要强调一下的是el...
前言
electron+vuecli3 实现设置打印机，静默打印小票功能
网上相关的资料比较少，这里给大家分享一下，希望大家可以少踩一些坑
必须要强调一下的是electron的版本必须是3.0.0不能，我尝试了4和5都没有实现
效果图
使用
git clone https://github.com/sunnie1992/electron-vue-print-demo.git npm install npm run electron:serve
实现
操作思路
1.用户点击打印
2.查询本地electron-store(用来向本地存储，读取数据)是否存打印机名称
3.已经设置，直接打印
4.没有设置，弹出设置打印机框
5.用户设置好确认后打印
首页app.vue引入了两个组件，一个是主动设置打印机的弹出printdialog
另外一个是打印组件，打印是通过webview将需要打印的内容渲染到html页面然后就能打印了
<template>
<div id="app">
<el-button type="primary" @click="showprint">设置打印机</el-button>
<printdialog :dialog-visible="dialogvisible" @cancel="handleprintdialogcancel" />
<pinter ref="print" :html-data="htmldata"></pinter>
<el-table :data="tabledata" style="width: 100%">
<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: '上海市浦东新区',
tag: '家'
}, {
date: '2016-05-04',
name: '我是小仙女1',
address: '上海市浦东新区',
tag: '公司'
}, {
date: '2016-05-01',
name: '我是小仙女2',
address: '上海市浦东新区',
tag: '家'
}, {
date: '2016-05-03',
name: '我是小仙女3',
address: '上海市浦东新区',
tag: '公司'
}]
}
},
mounted() {
},
methods: {
showprint() {
this.dialogvisible = true
},
handleprintdialogcancel() {
this.dialogvisible = false
},
doprint(row) {
this.htmldata = row.name
this.$refs.print.print(row.name)
}
}
}
</script>
<style>
#app {
font-family: 'avenir', helvetica, arial, sans-serif;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
text-align: center;
color: #2c3e50;
margin-top: 60px;
}
</style>
app.vue 每次点击打印按钮后触发组件的print方法并将数据传过去 this.$refs.print.print(row.name)
printer.vue 查询打印机，然后调用打印方法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.$emit('cancel')
}
},
)
}
})
},
methods: {
print(val) {
this.htmldata = val
this.getprintlisthandle()
},
// 获取打印机列表
getprintlisthandle() {
// 改用ipc异步方式获取列表，解决打印列数量多的时候导致卡死的问题
ipcrenderer.send('getprinterlist')
ipcrenderer.once('getprinterlist', (event, data) => {
// 过滤可用打印机
this.printlist = data.filter(element => element.status === 0)
// 1.判断是否有打印服务
if (this.printlist.length <= 0) {
this.$message({
message: '打印服务异常,请尝试重启电脑',
type: 'error'
})
this.$emit('cancel')
} else {
this.checkprinter()
}
})
},
// 2.判断打印机状态
checkprinter() {
// 本地获取打印机
const printername = this.$electronstore.get('printform') || ''
const printer = this.printlist.find(device => device.name === printername)
// 有打印机设备并且状态正常直接打印
if (printer && printer.status === 0) {
this.printdevicename = printername
this.printrender()
} else if (printername === '') {
this.$message({
message: '请先设置其他打印机',
type: 'error',
duration: 1000,
onclose: () => {
this.dialogvisible = true
}
})
this.$emit('cancel')
} else {
this.$message({
message: '当前打印机不可用,请重新设置',
type: 'error',
duration: 1000,
onclose: () => {
this.dialogvisible = true
}
})
}
},
handleprintdialogcancel() {
this.$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，请稍后',
duration: 0
})
// 获取<webview>节点
const webview = this.$refs.printwebview
// 发送信息到<webview>里的页面
webview.send('webview-print-render', {
printname: this.printdevicename,
html: this.htmldata
})
}
}
}
</script>
<style scoped>
.container {
position: fixed;
right: -500px;
}
</style>
public/print.html渲染webview页面成功后发送打印指令
<script>
const { ipcrenderer } = require('electron')
ipcrenderer.on('webview-print-render', (event, info) => {
// 执行渲染
document.getelementbyid('bd').innerhtml = info.html
ipcrenderer.sendtohost('webview-print-do')
})
</script>
这里用到了electron-store存取本地数据
background.js 引入 初始化挂载在global
import electronstore from 'electron-store'
// electronstore 默认数据
import electrondefaultdata from './config/electron-default-data'
let electronstore
app.on('ready', async() => {
// 初始化配置文件
electronstore = new electronstore({
defaults: electrondefaultdata,
cwd: app.getpath('userdata')
})
global.electronstore = electronstore
})
src/plugins/inject.js
注册$electronstore
// eslint-disable-next-line
import { remote } from 'electron'
export default {
/* eslint no-param-reassign: "error" */
install(vue) {
vue.prototype.$electronstore = remote.getglobal('electronstore')
}
}
然后你就可以在vue文件里读取了
this.$electronstore.get('printform') 和 this.$electronstore.set('printform', val.name)
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。