Google JavaScript API - chrome.printerProvider [英] Google JavaScript API - chrome.printerProvider

问题描述

我尝试制作打印扩展程序，可以配置打印选项并将打印作业发送到连接的打印机。

I'm trying to make a printing extension, that can configure printing options and send a print job to the attached printers.

打印，但打印API没有方法，只是事件，所以它不适合我。

I have made sample extensions other than printing, but the printing API has no methods, just events, so it's not working for me.

这是我的脚本（Event.js）：

Here is my script (Event.js):

chrome.printerProvider.onPrintRequested.addListener(
function( printJob, callback){
    var str = printJob.printerId + " , " + printJob.title ;
    alert('str: '+ str);
    console.log('str: '+str);
    appendToLog('str: '+ str );
    });


function callback(infos){
     console.log('Printing Completed!');
    }

正如我从文档中理解的那样，这应该在打印事件时触发。但是当我打印时，没有任何反应（它们没有触发）。

As I understood from the documentation, this should be triggered on printing events. But when i print, nothing happens (they are not triggered).

这是我的manifest.json的一部分：

Here is part of my manifest.json:

"background": {
    "scripts": ["event.js"],
    "persistent": false
  },

 "permissions": [
     "printerProvider"
 ]

Google PrintProvider JS API： https://developer.chrome.com/extensions/printerProvider

Google PrintProvider JS API: https://developer.chrome.com/extensions/printerProvider

谁能告诉我我做错了什么？或指导我一个有用的资源？

Can anyone tell me what am i doing wrong? or guide me to a useful resources?

推荐答案

您提供的打印机必须在 onGetPrintersRequested 事件优先。

The printer you're providing has to register itself at onGetPrintersRequested event first.

您是否理解此API的用途？它不会允许您修改现有打印机的打印设置。这是一种驱动程序界面，为Chrome提供了一个新的打印机（因此它的名字）。

Do you understand the purpose of this API? It will not allow you to modify print settings for existing printers. It's kind of a "driver" interface to provide (hence the name) a new printer to Chrome.

这篇关于Google JavaScript API - chrome.printerProvider的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！