如何在 ElectronJS 中打印 DIV [英] How to print a DIV in ElectronJS
问题描述
我正在尝试将我的网页转换为用 ElectronJS 制作的应用
i'm trying to convert my web into an app made in ElectronJS
在我的网页中，我打印了一个带有条形码的 div.这工作得很好，但在electronjs中我无法达到这个.
in my web i print a div with a barcode. this works pretty fine, but in electronjs i can't reach this.
本来我会用这个功能
$scope.printDiv = function (divName) {
var printContents = document.getElementById(divName).innerHTML;
var popupWin = window.open('', '_blank', 'width=500,height=500');
popupWin.document.open();
popupWin.document.write('<html><head><link rel="stylesheet" type="text/css" href="styles/main.css" type=\"text/css\" media=\"print\" /></head><body onload="window.print()">' + printContents + '</body></html>');
popupWin.document.close();
}
使用electronjs
with electronjs
我不知道如何将对象传递给打印.
i don't know how to pass the object to print.
我还试图从我可以加载的内容生成 PDF.但 PDF 已损坏
also i'm trying to generate a PDF from content that i can load. but the PDF's are corrupted
var windowPrint = require('electron').remote.BrowserWindow;
var fs = require('fs');
var newWindow = new windowPrint({width: 800, height: 600, show: false});
console.log(newWindow);
newWindow.loadURL('http://github.com');
newWindow.show();
newWindow.webContents.print({silent: true, printBackground: true});
newWindow.webContents.printToPDF({printSelectionOnly : true, printBackground: true}, function (error, data) {
if (error) {
throw error;
}
console.log(error);
console.log(data);
fs.writeFile('print.pdf', function (data, error) {
if (error) {
throw error;
}
console.log(error);
console.log(data);
});
});
有一种用electronjs打印DIV的简单方法吗?
there's a simple way to print a DIV with electronjs?
感谢阅读.
推荐答案
您在加载完成之前打印了此页面.
You have printed this page before loading is finished.
我的方法:1. 创建一个主窗口和一个(不可见的)工作窗口
My approach: 1. create a mainwindow and a (invisible) worker window
import {app, BrowserWindow, Menu, ipcMain, shell} from "electron";
const os = require("os");
const fs = require("fs");
const path = require("path");
let mainWindow: Electron.BrowserWindow = undefined;
let workerWindow: Electron.BrowserWindow = undefined;
async function createWindow() {
mainWindow = new BrowserWindow();
mainWindow.loadURL("file://" + __dirname + "/index.html");
mainWindow.webContents.openDevTools();
mainWindow.on("closed", () => {
// close worker windows later
mainWindow = undefined;
});
workerWindow = new BrowserWindow();
workerWindow.loadURL("file://" + __dirname + "/worker.html");
// workerWindow.hide();
workerWindow.webContents.openDevTools();
workerWindow.on("closed", () => {
workerWindow = undefined;
});
}
// retransmit it to workerWindow
ipcMain.on("printPDF", (event: any, content: any) => {
console.log(content);
workerWindow.webContents.send("printPDF", content);
});
// when worker window is ready
ipcMain.on("readyToPrintPDF", (event) => {
const pdfPath = path.join(os.tmpdir(), 'print.pdf');
// Use default printing options
workerWindow.webContents.printToPDF({}).then((data) {
fs.writeFile(pdfPath, data, function (error) {
if (error) {
throw error
}
shell.openItem(pdfPath)
event.sender.send('wrote-pdf', pdfPath)
})
}).catch((error) => {
throw error;
})
});
2、mainWindow.html
2, mainWindow.html
<head>
</head>
<body>
<button id="btn"> Save </button>
<script>
const ipcRenderer = require("electron").ipcRenderer;
// cannot send message to other windows directly https://github.com/electron/electron/issues/991
function sendCommandToWorker(content) {
ipcRenderer.send("printPDF", content);
}
document.getElementById("btn").addEventListener("click", () => {
// send whatever you like
sendCommandToWorker("<h1> hello </h1>");
});
</script>
</body>
3、worker.html
3, worker.html
<head> </head>
<body>
<script>
const ipcRenderer = require("electron").ipcRenderer;
ipcRenderer.on("printPDF", (event, content) => {
document.body.innerHTML = content;
ipcRenderer.send("readyToPrintPDF");
});
</script>
</body>
这篇关于如何在 ElectronJS 中打印 DIV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！
