Как я могу распечатать хорошую квитанцию ​​в JavaScript с помощью плагина - PullRequest
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Как я могу распечатать хорошую квитанцию ​​в JavaScript с помощью плагина

0 голосов
/ 08 ноября 2018

Я хочу отправить данные, которые уже отформатированы, в плагин Cordova Bluetooth этот плагин здесь

Я использую эти команды .js для принтера, но мне не удалось выровнять текст влево и вправо в одной строке, как Всего ------------------ --------------------- $ 70

Общая сумма должна быть сдвинута вправо, а общая сумма слева

вот код, который я написал. 

import { Component } from '@angular/core'
import { NavController } from 'ionic-angular'
import { commands } from './../../providers/printcommand/printcommand'

 declare var bluetoothSerial: any
@Component({
  selector: 'page-home',
  templateUrl: 'home.html'
})
export class HomePage {

  devicelists: any

  constructor(public navCtrl: NavController) {
   
  }

  ionViewDidLoad(){
      this.isEnabled()
      this.listDevices()
  }
listDevices() {
  bluetoothSerial.list(devices => this.devicelists = devices)
}
  isEnabled(){
    bluetoothSerial.enable(
      function() {
          alert("Bluetooth is enabled")
      },
      function() {
          alert("The user did *not* enable Bluetooth")
      }
  )
  return true
  }

  connect(data){
   // alert(data)
    bluetoothSerial.connect(data,
     function(result){
      console.log("Success")
      alert('Bluetooth printer connected')
    })
  }
  desconnect(data){
    bluetoothSerial.disconnect(function(data){
      console.log("Success")
      alert('Bluetooth printer desconnected')
    },function(err){
      console.log("Error")
      alert(err)
    })
  }
  // Call this method for printing
  print(){ 
    //Data to be printed presented in jsonData format.....
    let jsonData = [
      { id: 1, name: "Soda", price: 3.12},
      { id: 2, name: "Beer", price: 6.50},
      { id: 3, name: "Margarita", price: 12.99}
    ]
    const items = item => ({name: item.name, price: item.price})
    let product = jsonData.map(items)

    //Calculate the total price of the items in an object
    let totalPrice = jsonData.reduce((acc,next) => acc + next.price, 0)

    let company = "Apps Dev"
    let cashier = "Mathews M"
    let amoutntReceived = 400
    let change = amoutntReceived - totalPrice
    
    let receipt = ""
      receipt += commands.TEXT_FORMAT.TXT_2WIDTH
      receipt += "\x1b\x45\x01 \x00 Welcome to " +company+ "\x1b\x45\x00"
      receipt += '\n'
      receipt += commands.HORIZONTAL_LINE.HR_58MM
      receipt += '\n'
      receipt += commands.TEXT_FORMAT.TXT_NORMAL
      receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT
      receipt += "Cashier: "
      receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT
  
      receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT
      receipt +=  cashier
      receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT

      receipt += '\n'
      receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT
      receipt += "Items Bought:"
      receipt += '\n'
    
      for(var pro in product) {
        if (product.hasOwnProperty(pro)) {
          var item = product[pro]
          var itemName = item.name
          var itemPrice =  item.price
          receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT
          receipt += itemName
          receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT
          
          receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT
          receipt += itemPrice
          receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT
          receipt += '\n'
        }
      }
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT
    receipt += "Total:"
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT

    receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT
    receipt +=  "K" + totalPrice
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT
    receipt += '\n'
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT
    receipt += "Amount Received:"
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT

    receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT
    receipt +=  "K" +amoutntReceived
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT
    receipt += '\n'
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT
    receipt += "Change:"
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT

    receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT
    receipt +=  "K" + change 
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT

    receipt += '\n'
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT
    receipt += "Payment Type:"
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT
    
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_LT
    receipt +=  "Cash"
    receipt += commands.TEXT_FORMAT.TXT_ALIGN_RT

    receipt += '\n'
    receipt += commands.TEXT_FORMAT.TXT_FONT_A
    receipt += commands.HORIZONTAL_LINE.HR2_58MM
    receipt += '\n'
    receipt += commands.TEXT_FORMAT.TXT_FONT_A
    receipt += '\x1b\x61\x01'+ 'Outsource Now 2018' + '\x0a\x0a\x0a\x0a' //The unicode symbols are for centering the text
    // Write data to the printer now
    this.printText(receipt)
}

printText(receipt){  
    bluetoothSerial.write(receipt, function(data){
      console.log("Success")
      alert(`Work printed.`)
  },function(err){
      console.log("Error")
      alert(err)
  }, "String to Print")
 }
}
import { commands } from './../../providers/printcommand/printcommand'

имеет команды PRINTER из commands.js команды для форматирования текста

Любая помощь, я буду очень признателен

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